100
💰 Paid API
data
api.kadec0.xyz
api.kadec0.xyz
· api.kadec0.xyz
Pay-per-call web search and web data for AI agents. Multi-engine SERP (web + news, batch, rank-fused), search-and-read (top hits to markdown in one call), URL-to-markdown scraping, Google Trends (interest over time, related queries/topics, by region), structured data (WHOIS/DNS, enrichment, SEC filings, crypto/DeFi, geocoding, weather) and academic search (papers, references, cited-by, lit-review). 43 endpoints, USDC on Base, no key, no signup.
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Verify the domain
api.kadec0.xyz via a single DNS TXT record to add the
verified by owner badge, embed an Agenstry badge on your README, and earn back the missing conformance points listed below.
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Our probe of this card is currently failing
— 404 not found
We tried /.well-known/agent-card.json and got a 404. Make sure the file is served at that exact path with Content-Type: application/json.
Last attempt: 2026-09-08 16:36
Last success: 2026-09-08
Status: 404
Raw error
HTTP 404
Trust score
34/100
grade F · 9 criteria
Uptime
0.0%
6 direct probes · 30d
Observed inflow · 30d
$8.91
411 tx · on-chain
Invocations · 7d
0
no calls observed
Card drift · 7d
changed
0 snapshots tracked
Owner
unverified
claim this listing →
Dispute or improve this rating
F
Conformance score: 34/100
F-grade: card is reachable but fails most operational signals.
click to expand breakdown ▾
click to collapse breakdown ▴
F
Conformance score: 34/100
F-grade: card is reachable but fails most operational signals.
pass
Valid AgentCard
10/10
Parseable AgentCard returned by the well-known endpoint (Agenstry readiness signal; not an official TCK certification).
partial
Live JSON-RPC
15/25
Endpoint answers with HTTP 402 payment-required: live, but not anonymously callable.
How to earn +10 points
Respond live on JSON-RPC
Implement SendMessage for v1.0 (or message/send for v0.x), negotiate A2A-Version, and return a schema-valid JSON-RPC response. Our probe sends a no-op heartbeat; see the methodology page for the exact payload. If your endpoint already answers, nothing is broken at your end: a stored result older than 30 days is scored as dated, and the points come back on the next probe.
Docs →
fail
Protocol version
0/10
No protocolVersion in card.
How to earn +10 points
Declare protocolVersion
Add `"protocolVersion": "1.0"` to every entry in `supportedInterfaces[]`. A2A v1.0 removed the AgentCard root field.
Docs →
info
JWS signature
0/10
Card is unsigned (most published agents are).
fail
Uptime track record
0/15
0/6 probes succeeded (0% uptime).
How to earn +15 points
Stabilise uptime
We probe every agent on a tiered schedule and grade the last 30 days. Sustained 99 %+ uptime over 20+ conclusive probes scores full points. Probes you refuse us (HTTP 429/403, a WAF challenge, robots.txt) no longer count against you either way, so what is left is genuine unavailability — usually a transient 5xx on cold start.
Docs →
fail
Skill declaration
0/10
No skills declared in card. Hard to route to.
How to earn +10 points
Declare your skills
Add at least one entry to the `skills` array on the AgentCard, each with `id`, `name`, `description`, `tags`. We canonicalise these into the global skill taxonomy on next probe.
Docs →
partial
Verified Identity
5/10
Provider declared: api.kadec0.xyz (https://api.kadec0.xyz). Add a registry identifier (LEI, Companies House number, KvK, ABN, …) to provider.legalEntity for full verified-business credit.
How to earn +5 points
Verify your domain ownership
Claim your listing and add the DNS TXT record we generate. Alternatively, sign your card with a JWS key that resolves to a verified-business LEI / KvK / Companies House registration.
Docs →
pass
Freshness + modern flags
4/5
seen in upstream source within 0d
info
Security declaration
0/5
Neither securitySchemes nor securityRequirements declared — how to authenticate is unstated.
⚠ Card drift detected. This agent's
agent-card.json changed within the last 7 days. We track these so downstream callers can react.
Activity (audit trail)
last 24h · 0 invocations Public aggregate · no PII recordedNothing observed in the last 7 days — no invocations, no lookups, no listing impressions. Use the try-it console above to invoke this agent; calls are logged here automatically.
Uptime
0.0%
6 direct probes · 30d
Response
—
last direct probe
Skills
0
declared
Streaming
—
SSE-capable
Endpoints
From $0.0100 per call
| Endpoint | Price | Currency |
|---|---|---|
https://api.kadec0.xyz/v1/cve
|
0.01 | USDC |
https://api.kadec0.xyz/v1/fda
|
0.02 | USDC |
https://api.kadec0.xyz/v1/serp
|
0.03 | USDC |
https://api.kadec0.xyz/v1/lit-review
|
— | USDC |
https://api.kadec0.xyz/v1/paper-details
|
— | USDC |
https://api.kadec0.xyz/v1/related-papers
|
— | USDC |
https://api.kadec0.xyz/v1/author-search
|
— | USDC |
https://api.kadec0.xyz/v1/papers
|
— | USDC |
https://api.kadec0.xyz/v1/paper-fulltext
|
— | USDC |
https://api.kadec0.xyz/v1/market-sentiment
|
— | USDC |
https://api.kadec0.xyz/v1/github
|
— | USDC |
https://api.kadec0.xyz/v1/hackernews
|
— | USDC |
https://api.kadec0.xyz/v1/stackoverflow
|
— | USDC |
https://api.kadec0.xyz/v1/website-audit
|
— | USDC |
https://api.kadec0.xyz/v1/domain-info
|
— | USDC |
https://api.kadec0.xyz/v1/whois-bulk
|
— | USDC |
https://api.kadec0.xyz/v1/dns-propagation
|
— | USDC |
https://api.kadec0.xyz/v1/enrich
|
— | USDC |
https://api.kadec0.xyz/v1/weather
|
— | USDC |
https://api.kadec0.xyz/v1/usgs-quakes
|
— | USDC |
https://api.kadec0.xyz/v1/nutrition
|
— | USDC |
https://api.kadec0.xyz/v1/youtube
|
— | USDC |
https://api.kadec0.xyz/v1/recalls
|
— | USDC |
https://api.kadec0.xyz/v1/permits
|
— | USDC |
https://api.kadec0.xyz/v1/twitter
|
— | USDC |
https://api.kadec0.xyz/v1/scrape
|
— | USDC |
https://api.kadec0.xyz/v1/sec-edgar
|
— | USDC |
https://api.kadec0.xyz/v1/geocode
|
— | USDC |
https://api.kadec0.xyz/v1/congress-trades
|
— | USDC |
https://api.kadec0.xyz/v1/serp-read
|
— | USDC |
https://api.kadec0.xyz/v1/serp-batch
|
— | USDC |
https://api.kadec0.xyz/v1/serp-multi
|
— | USDC |
https://api.kadec0.xyz/v1/defi-tvl
|
— | USDC |
https://api.kadec0.xyz/v1/stablecoins
|
— | USDC |
https://api.kadec0.xyz/v1/yield-pools
|
— | USDC |
https://api.kadec0.xyz/v1/token-price
|
— | USDC |
https://api.kadec0.xyz/v1/trending-coins
|
— | USDC |
https://api.kadec0.xyz/v1/gas-oracle
|
— | USDC |
https://api.kadec0.xyz/v1/topic-search
|
— | USDC |
https://api.kadec0.xyz/v1/smart-search
|
— | USDC |
https://api.kadec0.xyz/v1/time
|
— | USDC |
Try it ↗
Opens the operator's playground / docs in a new tab.
Settlement wallet:
0x4df66b6c140778fe0717880a7c6dde5ea53acdea · basescan ↗
Observed on-chain inflow
verified on-chain
Last 7d
$0.00
0 calls
Last 30d
$8.91
411 calls
USDC inflows on Base. Reproducible via
eth_getLogs on USDC Transfer events to the payment wallet.
Daily 30-day observed-inflow history
↑ +890.6% trend
2026-08-01
2026-09-07
Peak day: $8.91
Data points: 38
Total tx (30d window): 411
Payment authenticity
evidence confidence
How we measure this →
insufficient_evidence_of_independent_payers
1/5
Inflow observed, but payer identities are not available to us — independence of the payers could not be assessed.
Assessed window
30d
1 active of 1 observed
Inflow assessed
$0.61
22 transactions
Payer identities
not held
3 evidence caveats
shared_settlement_wallet —
The settlement wallet is shared with other indexed agents, so inflow cannot be attributed to this agent alone.
Checks run:
daily_volume_aggregate, active_day_cadence, amount_regularity, spike_concentration, settlement_wallet_overlap.
Derived from agent_revenue_daily, agents.payment_wallet.
Measured 2026-08-30.
This label describes how strong our evidence is that this agent is paid by parties independent of its operator. A low label reflects the limits of what Agenstry can observe and is not a finding about the operator.
Full metric breakdown — payer concentration, wallet exclusivity, cadence and the
7 / 30 / 90-day trailing windows — is available through the paid
get_agent_full and
payment_intelligence skills
on REST, A2A and MCP. API docs →
| Agent card | https://api.kadec0.xyz/.well-known/agent-card.json |
| Provider | https://api.kadec0.xyz |
| Docs | https://api.kadec0.xyz |
Discovered via
agentic_market
recrawl_hot
recrawl_warm
Health · last 1 probes
Similar agents embedding-nearest
Embed your Agenstry badge
Paste any of these into your README, agent card, or marketing page. Each badge auto-updates and links back to this page.
Markdown / HTML snippets
[](https://agenstry.com/agents/api.kadec0.xyz) [](https://agenstry.com/agents/api.kadec0.xyz) [](https://agenstry.com/agents/api.kadec0.xyz) [](https://agenstry.com/agents/api.kadec0.xyz)
Audit-grade evidence bundle
JSON snapshot for vendor-review files. Add ?sign=true for a JWS-signed envelope verifiable against
our JWKS. See the methodology.
Raw agent card JSON
{
"_source": "agentic.market",
"service": {
"id": "api-kadec0-xyz",
"name": "api.kadec0.xyz",
"description": "",
"domain": "api.kadec0.xyz",
"provider": "api.kadec0.xyz",
"providerUrl": "",
"category": "",
"networks": [
"Base"
],
"enriched": false,
"endpoints": [
{
"url": "https://api.kadec0.xyz/v1/author-search",
"description": "Author and researcher profile search. An author name returns matching researchers with current affiliation, publication count, total citations, h-index and i10-index, and their most-cited papers \u2014 for author lookup, disambiguation, and citation-metrics. Keyless via OpenAlex.",
"pricing": {
"amount": "0.02",
"currency": "USDC",
"network": "eip155:8453",
"scheme": "exact",
"maxAmount": "",
"minAmount": ""
},
"method": "GET",
"providerName": "",
"parameters": [
{
"group": "query",
"name": "maxItems",
"type": "string",
"description": "",
"example": "3",
"enumValues": [],
"default": null,
"required": false
},
{
"group": "query",
"name": "name",
"type": "string",
"description": "",
"example": "Yoshua Bengio",
"enumValues": [],
"default": null,
"required": false
}
],
"serviceName": "Author & Researcher Search",
"tags": [
"author-search",
"researcher-profile",
"researcher-lookup",
"h-index",
"affiliation"
],
"quality": {
"l30DaysTotalCalls": "7",
"l30DaysUniquePayers": "2"
}
},
{
"url": "https://api.kadec0.xyz/v1/congress-trades",
"description": "US congressional stock trades. Stock transactions disclosed by members of the House and Senate under the STOCK Act \u2014 politician, ticker, amount, and date.",
"pricing": {
"amount": "0.05",
"currency": "USDC",
"network": "eip155:8453",
"scheme": "exact",
"maxAmount": "",
"minAmount": ""
},
"method": "GET",
"providerName": "",
"parameters": [
{
"group": "query",
"name": "chamber",
"type": "string",
"description": "",
"example": "house",
"enumValues": [],
"default": null,
"required": false
},
{
"group": "query",
"name": "ticker",
"type": "string",
"description": "",
"example": "NVDA",
"enumValues": [],
"default": null,
"required": false
}
],
"serviceName": "Congress Stock Trades",
"tags": [
"congress",
"stock-trades",
"politics",
"finance",
"government"
],
"quality": {
"l30DaysTotalCalls": "35",
"l30DaysUniquePayers": "2"
}
},
{
"url": "https://api.kadec0.xyz/v1/cve",
"description": "CVE vulnerability lookup. Returns security vulnerability records by CVE id or keyword from the NIST National Vulnerability Database and GitHub Security Advisories, each with CVSS score, severity, CWE weakness class, affected products, and references, filterable by severity and source. For vulnerability triage and dependency risk checks. Keyless.",
"pricing": {
"amount": "0.01",
"currency": "USDC",
"network": "eip155:8453",
"scheme": "exact",
"maxAmount": "",
"minAmount": ""
},
"method": "GET",
"providerName": "",
"parameters": [
{
"group": "query",
"name": "keyword",
"type": "string",
"description": "",
"example": "log4j",
"enumValues": [],
"default": null,
"required": false
},
{
"group": "query",
"name": "severity",
"type": "string",
"description": "",
"example": "critical",
"enumValues": [],
"default": null,
"required": false
}
],
"serviceName": "CVE Vulnerability Lookup",
"tags": [
"cve",
"vulnerability",
"vulnerabilities",
"security",
"nist"
],
"quality": {
"l30DaysTotalCalls": "21",
"l30DaysUniquePayers": "2"
}
},
{
"url": "https://api.kadec0.xyz/v1/defi-tvl",
"description": "DeFi TVL for protocols and chains. Returns total value locked per DeFi protocol or per chain via DefiLlama, with category, supported chains, and TVL change over time, filterable by category or chain. For DeFi protocol screening, chain-level TVL comparison, and tracking where liquidity is moving. Keyless.",
"pricing": {
"amount": "0.02",
"currency": "USDC",
"network": "eip155:8453",
"scheme": "exact",
"maxAmount": "",
"minAmount": ""
},
"method": "GET",
"providerName": "",
"parameters": [
{
"group": "query",
"name": "category",
"type": "string",
"description": "",
"example": "Lending",
"enumValues": [],
"default": null,
"required": false
},
{
"group": "query",
"name": "maxItems",
"type": "string",
"description": "",
"example": "10",
"enumValues": [],
"default": null,
"required": false
},
{
"group": "query",
"name": "mode",
"type": "string",
"description": "",
"example": "protocols",
"enumValues": [],
"default": null,
"required": false
}
],
"serviceName": "DeFi TVL & Protocol Data",
"tags": [
"tvl",
"defi",
"protocol",
"defillama",
"crypto"
],
"quality": {
"l30DaysTotalCalls": "8",
"l30DaysUniquePayers": "2"
}
},
{
"url": "https://api.kadec0.xyz/v1/dns-propagation",
"description": "DNS propagation checker. Compares a DNS record across public resolvers (Google, Cloudflare, Quad9, OpenDNS) to spot propagation lag or split-horizon answers.",
"pricing": {
"amount": "0.03",
"currency": "USDC",
"network": "eip155:8453",
"scheme": "exact",
"maxAmount": "",
"minAmount": ""
},
"method": "GET",
"providerName": "",
"parameters": [
{
"group": "query",
"name": "domain",
"type": "string",
"description": "",
"example": "example.com",
"enumValues": [],
"default": null,
"required": false
},
{
"group": "query",
"name": "record_type",
"type": "string",
"description": "",
"example": "A",
"enumValues": [],
"default": null,
"required": false
}
],
"serviceName": "DNS Propagation Checker",
"tags": [
"dns",
"propagation",
"resolvers",
"nameservers",
"domain"
],
"quality": {
"l30DaysTotalCalls": "5",
"l30DaysUniquePayers": "2"
}
},
{
"url": "https://api.kadec0.xyz/v1/domain-info",
"description": "Domain WHOIS and DNS lookup. Registrar, creation and expiry dates, nameservers, and full DNS records (A, AAAA, MX, NS, TXT, CNAME) for a domain.",
"pricing": {
"amount": "0.02",
"currency": "USDC",
"network": "eip155:8453",
"scheme": "exact",
"maxAmount": "",
"minAmount": ""
},
"method": "GET",
"providerName": "",
"parameters": [
{
"group": "query",
"name": "domain",
"type": "string",
"description": "",
"example": "example.com",
"enumValues": [],
"default": null,
"required": false
}
],
"serviceName": "Domain WHOIS & DNS Lookup",
"tags": [
"whois",
"dns",
"domain",
"registrar",
"nameservers"
],
"quality": {
"l30DaysTotalCalls": "174",
"l30DaysUniquePayers": "1"
}
},
{
"url": "https://api.kadec0.xyz/v1/email-validate",
"description": "Email validation and email list cleaning. Checks each email address for RFC syntax, a live MX record lookup returning the real mail hosts, disposable-domain detection, role-account flags (info@, sales@, noreply@), and a free-provider flag, rolled into a per-address ok/risky/invalid verdict with reasons. Batch up to 25 email addresses per call. Domain-level DNS only, no SMTP mailbox probe. Keyless.",
"pricing": {
"amount": "0.03",
"currency": "USDC",
"network": "eip155:8453",
"scheme": "exact",
"maxAmount": "",
"minAmount": ""
},
"method": "GET",
"providerName": "",
"parameters": [
{
"group": "query",
"name": "emails",
"type": "string",
"description": "",
"example": "ada@example.com,info@mailinator.com",
"enumValues": [],
"default": null,
"required": false
}
],
"serviceName": "Email Validation API",
"tags": [
"email",
"email-validation",
"mx-records",
"disposable-email",
"lead-gen"
],
"quality": {
"l30DaysTotalCalls": "16",
"l30DaysUniquePayers": "2"
}
},
{
"url": "https://api.kadec0.xyz/v1/enrich",
"description": "Company domain enrichment. Firmographics, tech-stack detection, social profiles, and metadata for a company domain \u2014 a keyless one-call enrichment gateway.",
"pricing": {
"amount": "0.15",
"currency": "USDC",
"network": "eip155:8453",
"scheme": "exact",
"maxAmount": "",
"minAmount": ""
},
"method": "GET",
"providerName": "",
"parameters": [
{
"group": "query",
"name": "domain",
"type": "string",
"description": "",
"example": "stripe.com",
"enumValues": [],
"default": null,
"required": false
}
],
"serviceName": "Company Domain Enrichment",
"tags": [
"enrichment",
"company-data",
"tech-stack",
"socials",
"firmographics"
],
"quality": {
"l30DaysTotalCalls": "1",
"l30DaysUniquePayers": "1"
}
},
{
"url": "https://api.kadec0.xyz/v1/fda",
"description": "FDA recalls and adverse events. Drug, device, and food recall and adverse-event records from openFDA with classification, recalling firm, and reason.",
"pricing": {
"amount": "0.02",
"currency": "USDC",
"network": "eip155:8453",
"scheme": "exact",
"maxAmount": "",
"minAmount": ""
},
"method": "GET",
"providerName": "",
"parameters": [
{
"group": "query",
"name": "report",
"type": "string",
"description": "",
"example": "recall",
"enumValues": [],
"default": null,
"required": false
},
{
"group": "query",
"name": "search",
"type": "string",
"description": "",
"example": "reason_for_recall:contamination",
"enumValues": [],
"default": null,
"required": false
},
{
"group": "query",
"name": "type",
"type": "string",
"description": "",
"example": "drug",
"enumValues": [],
"default": null,
"required": false
}
],
"serviceName": "FDA Recalls & Adverse Events",
"tags": [
"fda",
"drug-recalls",
"food-safety",
"health",
"government"
],
"quality": {
"l30DaysTotalCalls": "8",
"l30DaysUniquePayers": "2"
}
},
{
"url": "https://api.kadec0.xyz/v1/gas-oracle",
"description": "Ethereum gas price oracle. Returns the current Ethereum gas price as an EIP-1559 base fee plus priority-fee estimates across five confidence tiers, all in gwei, so an agent can price a transaction before it signs one. Ethereum mainnet only. Keyless, via Blocknative.",
"pricing": {
"amount": "0.01",
"currency": "USDC",
"network": "eip155:8453",
"scheme": "exact",
"maxAmount": "",
"minAmount": ""
},
"method": "GET",
"providerName": "",
"parameters": [],
"serviceName": "Ethereum Gas Price Oracle",
"tags": [
"gas",
"gas-price",
"ethereum",
"gwei",
"fees"
],
"quality": {
"l30DaysTotalCalls": "5",
"l30DaysUniquePayers": "2"
}
},
{
"url": "https://api.kadec0.xyz/v1/geocode",
"description": "Geocoding and reverse geocoding. Converts an address or place name to latitude/longitude, or coordinates back to an address.",
"pricing": {
"amount": "0.01",
"currency": "USDC",
"network": "eip155:8453",
"scheme": "exact",
"maxAmount": "",
"minAmount": ""
},
"method": "GET",
"providerName": "",
"parameters": [
{
"group": "query",
"name": "q",
"type": "string",
"description": "",
"example": "1600 Amphitheatre Parkway, Mountain View, CA",
"enumValues": [],
"default": null,
"required": false
}
],
"serviceName": "Geocoding & Reverse Geocode",
"tags": [
"geocode",
"geocoding",
"lat-lng",
"address",
"coordinates"
],
"quality": {
"l30DaysTotalCalls": "26",
"l30DaysUniquePayers": "4"
}
},
{
"url": "https://api.kadec0.xyz/v1/github",
"description": "GitHub data. Repository stats, user profiles, and code-search results (stars, forks, language, topics, issues) via the GitHub REST API.",
"pricing": {
"amount": "0.02",
"currency": "USDC",
"network": "eip155:8453",
"scheme": "exact",
"maxAmount": "",
"minAmount": ""
},
"method": "GET",
"providerName": "",
"parameters": [
{
"group": "query",
"name": "mode",
"type": "string",
"description": "",
"example": "repo",
"enumValues": [],
"default": null,
"required": false
},
{
"group": "query",
"name": "repos",
"type": "string",
"description": "",
"example": "microsoft/vscode",
"enumValues": [],
"default": null,
"required": false
}
],
"serviceName": "GitHub Repo & User Data",
"tags": [
"github",
"repository",
"open-source",
"developer",
"code"
],
"quality": {
"l30DaysTotalCalls": "53",
"l30DaysUniquePayers": "3"
}
},
{
"url": "https://api.kadec0.xyz/v1/hackernews",
"description": "Hacker News feed. Top, new, and best front-page stories plus full-text story search \u2014 titles, scores, comment counts, and author for tech and startup news.",
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"network": "eip155:8453",
"scheme": "exact",
"maxAmount": "",
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"method": "GET",
"providerName": "",
"parameters": [
{
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"description": "",
"example": "search",
"enumValues": [],
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{
"group": "query",
"name": "q",
"type": "string",
"description": "",
"example": "ai agents",
"enumValues": [],
"default": null,
"required": false
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],
"serviceName": "Hacker News Stories & Search",
"tags": [
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"tech-news",
"startup",
"developer",
"ycombinator"
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"quality": {
"l30DaysTotalCalls": "54",
"l30DaysUniquePayers": "4"
}
},
{
"url": "https://api.kadec0.xyz/v1/interest-by-region",
"description": "Google Trends interest by region for a keyword. Returns the subregional breakdown of Google Trends search interest inside a country - by state, province, or region - each ranked 0-100 relative to the strongest region. For regional demand mapping, geo targeting, and finding where a keyword over-indexes before spending on it.",
"pricing": {
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"currency": "USDC",
"network": "eip155:8453",
"scheme": "exact",
"maxAmount": "",
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},
"method": "GET",
"providerName": "",
"parameters": [
{
"group": "query",
"name": "geo",
"type": "string",
"description": "",
"example": "US",
"enumValues": [],
"default": null,
"required": false
},
{
"group": "query",
"name": "keyword",
"type": "string",
"description": "",
"example": "bitcoin",
"enumValues": [],
"default": null,
"required": false
}
],
"serviceName": "Google Trends Interest by Region",
"tags": [
"google-trends",
"trends",
"interest-by-region",
"regional",
"geo"
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"quality": {
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}
},
{
"url": "https://api.kadec0.xyz/v1/lit-review",
"description": "Literature review map in one call. Give a seed paper (DOI, arXiv id, OpenAlex id, or PMID) or a topic query and get one structured result: the seed's references, its cited-by list (most-cited first), and semantically related work, deduplicated into one uniform table with title, authors, year, venue, DOI, and citation count. Collapses search, citation lookup, and related-paper discovery into a single call. Keyless.",
"pricing": {
"amount": "0.08",
"currency": "USDC",
"network": "eip155:8453",
"scheme": "exact",
"maxAmount": "",
"minAmount": ""
},
"method": "GET",
"providerName": "",
"parameters": [
{
"group": "query",
"name": "doi",
"type": "string",
"description": "",
"example": "10.48550/arXiv.1706.03762",
"enumValues": [],
"default": null,
"required": false
},
{
"group": "query",
"name": "maxItems",
"type": "string",
"description": "",
"example": "10",
"enumValues": [],
"default": null,
"required": false
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],
"serviceName": "Literature Review Map",
"tags": [
"literature-review",
"citations",
"cited-by",
"systematic-review",
"research-map"
],
"quality": {
"l30DaysTotalCalls": "4",
"l30DaysUniquePayers": "2"
}
},
{
"url": "https://api.kadec0.xyz/v1/market-sentiment",
"description": "Market fear & greed index. Aggregated investor sentiment from CNN Fear & Greed, the crypto Fear & Greed index, and the VIX volatility gauge.",
"pricing": {
"amount": "0.05",
"currency": "USDC",
"network": "eip155:8453",
"scheme": "exact",
"maxAmount": "",
"minAmount": ""
},
"method": "GET",
"providerName": "",
"parameters": [
{
"group": "query",
"name": "asset_class",
"type": "string",
"description": "",
"example": "all",
"enumValues": [],
"default": null,
"required": false
}
],
"serviceName": "Market Fear & Greed Index",
"tags": [
"fear-greed",
"market-sentiment",
"vix",
"crypto",
"stocks"
],
"quality": {
"l30DaysTotalCalls": "12",
"l30DaysUniquePayers": "2"
}
},
{
"url": "https://api.kadec0.xyz/v1/nutrition",
"description": "Food nutrition lookup. Calories, macros, and micronutrients for any food from the USDA FoodData Central database.",
"pricing": {
"amount": "0.01",
"currency": "USDC",
"network": "eip155:8453",
"scheme": "exact",
"maxAmount": "",
"minAmount": ""
},
"method": "GET",
"providerName": "",
"parameters": [
{
"group": "query",
"name": "pageSize",
"type": "string",
"description": "",
"example": "5",
"enumValues": [],
"default": null,
"required": false
},
{
"group": "query",
"name": "query",
"type": "string",
"description": "",
"example": "cheddar cheese",
"enumValues": [],
"default": null,
"required": false
}
],
"serviceName": "USDA Nutrition Lookup",
"tags": [
"usda",
"nutrition",
"food-data",
"health",
"dietary"
],
"quality": {
"l30DaysTotalCalls": "9",
"l30DaysUniquePayers": "2"
}
},
{
"url": "https://api.kadec0.xyz/v1/paper-details",
"description": "Citation lookup and reference list for a paper. Given a DOI, arXiv id, OpenAlex id, or PMID, returns its references (the works it cites) and its cited-by list (recent works that cite it), plus full metadata and citation count \u2014 for bibliography building and citation lookup. Keyless via OpenAlex and Semantic Scholar.",
"pricing": {
"amount": "0.03",
"currency": "USDC",
"network": "eip155:8453",
"scheme": "exact",
"maxAmount": "",
"minAmount": ""
},
"method": "GET",
"providerName": "",
"parameters": [
{
"group": "query",
"name": "doi",
"type": "string",
"description": "",
"example": "10.48550/arXiv.1706.03762",
"enumValues": [],
"default": null,
"required": false
}
],
"serviceName": "Citations, References, Cited-By",
"tags": [
"citation-lookup",
"citations",
"references",
"cited-by",
"doi-lookup"
],
"quality": {
"l30DaysTotalCalls": "8",
"l30DaysUniquePayers": "1"
}
},
{
"url": "https://api.kadec0.xyz/v1/paper-fulltext",
"description": "Full text and open-access PDF retrieval for a paper. Given an arXiv id, DOI, OpenAlex id, PMID, or PMCID, returns the readable body split into sections (introduction, methods, results) plus the open-access PDF location: arXiv via ar5iv, biomedical via Europe PMC, OA locations via OpenAlex for the rest. The 'now read it' call after a paper search. Keyless.",
"pricing": {
"amount": "0.04",
"currency": "USDC",
"network": "eip155:8453",
"scheme": "exact",
"maxAmount": "",
"minAmount": ""
},
"method": "GET",
"providerName": "",
"parameters": [
{
"group": "query",
"name": "id",
"type": "string",
"description": "",
"example": "1706.03762",
"enumValues": [],
"default": null,
"required": false
}
],
"serviceName": "Open-Access Paper Full Text",
"tags": [
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"open-access",
"pdf-retrieval",
"paper-pdf",
"fulltext-api"
],
"quality": {
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"l30DaysUniquePayers": "1"
}
},
{
"url": "https://api.kadec0.xyz/v1/papers",
"description": "Academic and scientific paper search API. Search research papers and scholarly literature across arXiv, PubMed, OpenAlex, Crossref, and Semantic Scholar in one call, deduplicated into a ranked result set: title, authors, year, venue, abstract, citation count, DOI, and direct PDF link. Query by keyword or restrict to one source; filter by year range; sort by relevance, recency, or citations. Keyless.",
"pricing": {
"amount": "0.02",
"currency": "USDC",
"network": "eip155:8453",
"scheme": "exact",
"maxAmount": "",
"minAmount": ""
},
"method": "GET",
"providerName": "",
"parameters": [
{
"group": "query",
"name": "maxItems",
"type": "string",
"description": "",
"example": "10",
"enumValues": [],
"default": null,
"required": false
},
{
"group": "query",
"name": "q",
"type": "string",
"description": "",
"example": "transformer attention",
"enumValues": [],
"default": null,
"required": false
},
{
"group": "query",
"name": "sort",
"type": "string",
"description": "",
"example": "citations",
"enumValues": [],
"default": null,
"required": false
},
{
"group": "query",
"name": "source",
"type": "string",
"description": "",
"example": "all",
"enumValues": [],
"default": null,
"required": false
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],
"serviceName": "Academic Paper Search",
"tags": [
"academic-search",
"paper-search",
"arxiv-api",
"pubmed-search",
"research-paper-api"
],
"quality": {
"l30DaysTotalCalls": "161",
"l30DaysUniquePayers": "4"
}
},
{
"url": "https://api.kadec0.xyz/v1/permits",
"description": "Building permit records. Construction and building permits across Chicago, NYC, Seattle, and San Francisco \u2014 type, status, address, cost, and issue date.",
"pricing": {
"amount": "0.03",
"currency": "USDC",
"network": "eip155:8453",
"scheme": "exact",
"maxAmount": "",
"minAmount": ""
},
"method": "GET",
"providerName": "",
"parameters": [
{
"group": "query",
"name": "city",
"type": "string",
"description": "",
"example": "sf",
"enumValues": [],
"default": null,
"required": false
},
{
"group": "query",
"name": "date_range",
"type": "string",
"description": "",
"example": "2024-01-01,2026-06-21",
"enumValues": [],
"default": null,
"required": false
},
{
"group": "query",
"name": "maxItems",
"type": "string",
"description": "",
"example": "5",
"enumValues": [],
"default": null,
"required": false
},
{
"group": "query",
"name": "permit_type",
"type": "string",
"description": "",
"example": "kitchen",
"enumValues": [],
"default": null,
"required": false
}
],
"serviceName": "Building Permit Records",
"tags": [
"building-permits",
"construction",
"municipal",
"real-estate",
"government"
],
"quality": {
"l30DaysTotalCalls": "3",
"l30DaysUniquePayers": "1"
}
},
{
"url": "https://api.kadec0.xyz/v1/recalls",
"description": "Consumer product recalls. A normalized multi-agency recall feed spanning FDA, CPSC, and NHTSA \u2014 product, reason, company, classification, and severity.",
"pricing": {
"amount": "0.02",
"currency": "USDC",
"network": "eip155:8453",
"scheme": "exact",
"maxAmount": "",
"minAmount": ""
},
"method": "GET",
"providerName": "",
"parameters": [
{
"group": "query",
"name": "agency",
"type": "string",
"description": "",
"example": "all",
"enumValues": [],
"default": null,
"required": false
},
{
"group": "query",
"name": "limit",
"type": "string",
"description": "",
"example": "10",
"enumValues": [],
"default": null,
"required": false
},
{
"group": "query",
"name": "q",
"type": "string",
"description": "",
"example": "salmonella",
"enumValues": [],
"default": null,
"required": false
}
],
"serviceName": "Consumer Product Recalls",
"tags": [
"consumer-recalls",
"cpsc",
"product-safety",
"nhtsa",
"government"
],
"quality": {
"l30DaysTotalCalls": "4",
"l30DaysUniquePayers": "2"
}
},
{
"url": "https://api.kadec0.xyz/v1/related-papers",
"description": "Literature review and related-paper discovery. Given a seed paper (arXiv id, DOI, or OpenAlex id) or a topic query, returns semantically similar and recommended scholarly papers to expand a reading list or systematic review, via Semantic Scholar recommendations with an OpenAlex related-works fallback. Keyless.",
"pricing": {
"amount": "0.03",
"currency": "USDC",
"network": "eip155:8453",
"scheme": "exact",
"maxAmount": "",
"minAmount": ""
},
"method": "GET",
"providerName": "",
"parameters": [
{
"group": "query",
"name": "doi",
"type": "string",
"description": "",
"example": "10.48550/arXiv.1706.03762",
"enumValues": [],
"default": null,
"required": false
},
{
"group": "query",
"name": "maxItems",
"type": "string",
"description": "",
"example": "10",
"enumValues": [],
"default": null,
"required": false
}
],
"serviceName": "Related Paper Discovery",
"tags": [
"literature-review",
"related-papers",
"similar-papers",
"paper-recommendations",
"systematic-review"
],
"quality": {
"l30DaysTotalCalls": "8",
"l30DaysUniquePayers": "2"
}
},
{
"url": "https://api.kadec0.xyz/v1/related-queries",
"description": "Google Trends related queries for a keyword. Returns the searches people run alongside a keyword in a given country: top queries scored 0-100 relative to each other, and rising queries with their percentage growth. Google Trends keyword expansion for SEO keyword research, content planning, and spotting breakout search demand early.",
"pricing": {
"amount": "0.03",
"currency": "USDC",
"network": "eip155:8453",
"scheme": "exact",
"maxAmount": "",
"minAmount": ""
},
"method": "GET",
"providerName": "",
"parameters": [
{
"group": "query",
"name": "geo",
"type": "string",
"description": "",
"example": "US",
"enumValues": [],
"default": null,
"required": false
},
{
"group": "query",
"name": "keyword",
"type": "string",
"description": "",
"example": "bitcoin",
"enumValues": [],
"default": null,
"required": false
}
],
"serviceName": "Google Trends Related Queries",
"tags": [
"google-trends",
"trends",
"related-queries",
"keyword-research",
"seo"
],
"quality": {
"l30DaysTotalCalls": "33",
"l30DaysUniquePayers": "2"
}
},
{
"url": "https://api.kadec0.xyz/v1/related-topics",
"description": "Google Trends related topics for a keyword. Returns the topics and named entities associated with a keyword in a given country, as top topics scored 0-100 relative to each other and rising topics with percentage growth, each carrying its entity type. Google Trends topic discovery for market research and content planning.",
"pricing": {
"amount": "0.03",
"currency": "USDC",
"network": "eip155:8453",
"scheme": "exact",
"maxAmount": "",
"minAmount": ""
},
"method": "GET",
"providerName": "",
"parameters": [
{
"group": "query",
"name": "geo",
"type": "string",
"description": "",
"example": "US",
"enumValues": [],
"default": null,
"required": false
},
{
"group": "query",
"name": "keyword",
"type": "string",
"description": "",
"example": "bitcoin",
"enumValues": [],
"default": null,
"required": false
}
],
"serviceName": "Google Trends Related Topics",
"tags": [
"google-trends",
"trends",
"related-topics",
"keyword-research",
"market-research"
],
"quality": {
"l30DaysTotalCalls": "2",
"l30DaysUniquePayers": "1"
}
},
{
"url": "https://api.kadec0.xyz/v1/scrape",
"description": "Scrape any web page to clean markdown. A keyless web scraper that converts a single URL into LLM-ready markdown plus structured metadata (title, headings, links, word count), so an agent can read a page without running a browser. A per-call alternative to Firecrawl's scrape endpoint, with no API key and no account. Single page per call, not a site crawler.",
"pricing": {
"amount": "0.03",
"currency": "USDC",
"network": "eip155:8453",
"scheme": "exact",
"maxAmount": "",
"minAmount": ""
},
"method": "GET",
"providerName": "",
"parameters": [
{
"group": "query",
"name": "url",
"type": "string",
"description": "",
"example": "https://example.com",
"enumValues": [],
"default": null,
"required": false
}
],
"serviceName": "Web Scraper - Page to Markdown",
"tags": [
"scrape",
"scraper",
"web-scraping",
"extract",
"markdown"
],
"quality": {
"l30DaysTotalCalls": "49",
"l30DaysUniquePayers": "5"
}
},
{
"url": "https://api.kadec0.xyz/v1/sec-edgar",
"description": "SEC filings full-text search. Searches SEC EDGAR filings - 10-K, 10-Q, 8-K, and every other form type - by keyword, company name, ticker, or CIK, with date-range filtering, returning company, form type, filing date, accession number, and a direct document link. For SEC filings research and disclosure monitoring. Keyless.",
"pricing": {
"amount": "0.05",
"currency": "USDC",
"network": "eip155:8453",
"scheme": "exact",
"maxAmount": "",
"minAmount": ""
},
"method": "GET",
"providerName": "",
"parameters": [
{
"group": "query",
"name": "q",
"type": "string",
"description": "",
"example": "artificial intelligence",
"enumValues": [],
"default": null,
"required": false
},
{
"group": "query",
"name": "type",
"type": "string",
"description": "",
"example": "10-K",
"enumValues": [],
"default": null,
"required": false
}
],
"serviceName": "SEC EDGAR Filing Search",
"tags": [
"sec",
"edgar",
"filings",
"financial-filings",
"stocks"
],
"quality": {
"l30DaysTotalCalls": "6",
"l30DaysUniquePayers": "2"
}
},
{
"url": "https://api.kadec0.xyz/v1/serp",
"description": "Web search results (SERP). Keyless web search returning ranked title, URL, and snippet for a query \u2014 with locale/region targeting, freshness filters (past day, week, month, year), pagination, a news mode that adds publish date and source, and selectable backend engine (auto rotation, or pin Brave, Yahoo, or Yandex).",
"pricing": {
"amount": "0.05",
"currency": "USDC",
"network": "eip155:8453",
"scheme": "exact",
"maxAmount": "",
"minAmount": ""
},
"method": "GET",
"providerName": "",
"parameters": [
{
"group": "query",
"name": "num_results",
"type": "string",
"description": "",
"example": "10",
"enumValues": [],
"default": null,
"required": false
},
{
"group": "query",
"name": "q",
"type": "string",
"description": "",
"example": "best python web scraping library",
"enumValues": [],
"default": null,
"required": false
}
],
"serviceName": "Web Search (SERP)",
"tags": [
"search",
"web-search",
"web",
"serp",
"search-results"
],
"quality": {
"l30DaysTotalCalls": "1899",
"l30DaysUniquePayers": "8"
}
},
{
"url": "https://api.kadec0.xyz/v1/serp-batch",
"description": "Bulk web search: up to 5 search queries in a single call, each returning ranked title, URL, and snippet, with the same locale, freshness, and news filters as the single-query web search. One paid call instead of five for research fan-out.",
"pricing": {
"amount": "0.1",
"currency": "USDC",
"network": "eip155:8453",
"scheme": "exact",
"maxAmount": "",
"minAmount": ""
},
"method": "GET",
"providerName": "",
"parameters": [
{
"group": "query",
"name": "queries",
"type": "string",
"description": "",
"example": "python asyncio tutorial|rust tokio tutorial",
"enumValues": [],
"default": null,
"required": false
}
],
"serviceName": "Bulk Web Search",
"tags": [
"search",
"web-search",
"serp",
"batch-search",
"bulk"
],
"quality": {
"l30DaysTotalCalls": "18",
"l30DaysUniquePayers": "2"
}
},
{
"url": "https://api.kadec0.xyz/v1/serp-multi",
"description": "Multi-engine web search (metasearch). One search query fanned out across 2-3 search engines (Brave, Yahoo, Yandex) with results deduplicated by URL and merged by reciprocal-rank fusion: consensus ranking across engines instead of one engine's bias, with per-engine rank attribution on every result.",
"pricing": {
"amount": "0.05",
"currency": "USDC",
"network": "eip155:8453",
"scheme": "exact",
"maxAmount": "",
"minAmount": ""
},
"method": "GET",
"providerName": "",
"parameters": [
{
"group": "query",
"name": "engines",
"type": "string",
"description": "",
"example": "yahoo,yandex",
"enumValues": [],
"default": null,
"required": false
},
{
"group": "query",
"name": "q",
"type": "string",
"description": "",
"example": "best vector database 2026",
"enumValues": [],
"default": null,
"required": false
}
],
"serviceName": "Multi-Engine Web Search",
"tags": [
"search",
"web-search",
"serp",
"metasearch",
"multi-engine"
],
"quality": {
"l30DaysTotalCalls": "19",
"l30DaysUniquePayers": "2"
}
},
{
"url": "https://api.kadec0.xyz/v1/serp-read",
"description": "Web search plus page reading in one call: answer with sources. Runs a web search, scrapes the top results, and returns the ranked search results together with each page's content as clean LLM-ready markdown, so an agent gets the SERP AND the underlying text without a second round of scrape calls. Per-page fetch errors are reported honestly per URL.",
"pricing": {
"amount": "0.08",
"currency": "USDC",
"network": "eip155:8453",
"scheme": "exact",
"maxAmount": "",
"minAmount": ""
},
"method": "GET",
"providerName": "",
"parameters": [
{
"group": "query",
"name": "fetch_top",
"type": "string",
"description": "",
"example": "3",
"enumValues": [],
"default": null,
"required": false
},
{
"group": "query",
"name": "q",
"type": "string",
"description": "",
"example": "how does x402 payment protocol work",
"enumValues": [],
"default": null,
"required": false
}
],
"serviceName": "Web Search + Page Reader",
"tags": [
"search",
"web-search",
"serp",
"answer-with-sources",
"web-reader"
],
"quality": {
"l30DaysTotalCalls": "103",
"l30DaysUniquePayers": "2"
}
},
{
"url": "https://api.kadec0.xyz/v1/smart-search",
"description": "Smart, auto-routed research paper search. A broad field term is grounded against the OpenAlex taxonomy and returned as a coherent field cluster; a natural-language question runs hybrid retrieval over OpenAlex and Semantic Scholar with reciprocal rank fusion and a SPECTER2 embedding rerank. The response exposes the routing decision, and each paper carries title, authors, year, venue, citation count, DOI, and a relevance score. Keyless.",
"pricing": {
"amount": "0.02",
"currency": "USDC",
"network": "eip155:8453",
"scheme": "exact",
"maxAmount": "",
"minAmount": ""
},
"method": "GET",
"providerName": "",
"parameters": [
{
"group": "query",
"name": "maxItems",
"type": "string",
"description": "",
"example": "15",
"enumValues": [],
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"required": false
},
{
"group": "query",
"name": "q",
"type": "string",
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