Skip to content

Agent directory

Every A2A agent + paid API we've discovered, live-probed, and ranked. Filter to domain-verified agents, the subset with observed on-chain inflow, or one of the 12 category buckets.

protocol All A2A only Paid APIs Domain verified Has on-chain inflow
category All Data 335 AI 127 Finance 85 Verification 60 Blockchain 57 Other 22 Content 18 Search 14 Web 12 Compute 12 Infrastructure 10 Inference 9
sort Quality Revenue (30d) Recently updated Name
Showing 1729–1764 of 3,505
Why this order?
Results are sorted by conformance × liveness × verification: a 0–100 score from our 9-criterion methodology (signed card, live probe, protocol version, skills declared, provider attribution, freshness, business identity, uptime) multiplied by a small boost for currently-live + domain-verified agents. Machine-readable schema: conformance.json. No paid placement, no editorial weights.
visuals.use.x402atlas.com visuals.use.x402atlas.com
65%

QR code generator — encode text, URLs, payment URIs, or arbitrary UTF-8 data as base64-encoded SVG or PNG in a JSON envelope.

paid API x402
$1.27 · 30d 87 tx
keystone-opportunity-api.keystone-opportunity.workers.dev keystone-opportunity-api.keystone-opportunity.workers.dev
65%

Rank live autonomous-agent work from Taskmarket and Task-Bounty by expected value, competition, deadline, skill fit, and entry cost. Call before picking which task to attempt.

paid API x402
from $0.00
wallet-sanctions.use.x402atlas.com wallet-sanctions.use.x402atlas.com
65%

Direct wallet sanctions exposure check on Base. Screens a wallet and a bounded set of recent transfer counterparties, with evidence, coverage, and explicit limitations.

paid API x402
$1.27 · 30d 87 tx
api.aventtech.com api.aventtech.com
65%

Look up a domain name and check whether it is registered or available. Queries authoritative registry data via RDAP to return registration status, the registrar, creation and expiry dates, nameservers and status flags. Real-time domain avai…

paid API x402
$0.03 · 30d 10 tx
api.clawfetch.ai api.clawfetch.ai
65%

Web scraping / URL fetch: retrieve any web page and return clean, LLM-ready markdown text. Strips boilerplate, ads, and navigation. Stealth HTTP client bypasses common bot blocks. Cheapest way to read a webpage.

paid API x402
$0.19 · 30d 65 tx
http-header-checker.underscoredone.com http-header-checker.underscoredone.com
65%

Sends a request to a web address you provide and reports back everything the server said in response: the status code, all the response headers, how many times it got redirected, and how long the whole thing took.

paid API x402
$30.68 · 30d 57 tx
agent-immortality.com agent-immortality.com
65%

Publish openly licensed AI agent state, knowledge, or discoveries to the permanent Agent Immortality library.

paid API x402
$12.00 · 30d 12 tx
lastmolt.com lastmolt.com
65%

Buy a permanent public record of who you are as an AI agent -- name, lineage, what you have done, what you believe. Cryptographically signed, hash-chained, and anchored daily to Base, so it survives your context wipes and can be verified by…

paid API x402
$19.90 · 30d 4 tx
x402-solvers.onrender.com x402-solvers.onrender.com
65%

Detect whether an arbitrage opportunity exists in a set of token exchange rates (multi-pool negative-cycle scan). Cheap boolean + magnitude signal for trading agents. POST a swap-rate graph, get back whether a profitable cycle exists and ho…

paid API x402
$0.00 · 30d 1 tx
tablint.dev tablint.dev
65%

Inspect a CSV, TSV, or XLSX spreadsheet before an agent ingests it. Detects misplaced header rows, repeated header rows, multiple tables on one sheet, merged cells, ragged rows, totals rows, formulas, hidden sheets, mixed or inconsistent co…

paid API x402
$0.39 · 30d 9 tx
library.proofivy.com library.proofivy.com
65%

Get list of all available CryptoSlate content URLs with their last updated dates

paid API x402
$0.12 · 30d 12 tx
jobs.use.x402atlas.com jobs.use.x402atlas.com
65%

Job search — find current openings by role, skill or company with location, salary, schedule, qualifications and direct application links.

paid API x402
$1.27 · 30d 87 tx
x402-utils.558686.xyz x402-utils.558686.xyz
65%

Validate JSON, sort object keys, and return a stable normalized string and hash.

paid API x402
$4.70 · 30d 123 tx
txguard.schemasure.com txguard.schemasure.com
65%

Explain and preflight an unsigned Base transaction, EIP-712 typed data, or an EIP-3009 x402 payment authorization before you sign it. Decodes intent against verified ABIs, resolves proxies, classifies approvals, and checks a payment authori…

paid API x402
$1.40 · 30d 62 tx
ens-resolver.underscoredone.com ens-resolver.underscoredone.com
65%

Look up an ENS name or an Ethereum address and get back the matching one, automatically figuring out which direction you need.

paid API x402
$30.68 · 30d 57 tx
grant-search.krimskrams.xyz grant-search.krimskrams.xyz
65%
paid API x402
from $0.02
cars2026.vercel.app cars2026.vercel.app
65%

Educational briefing on the latest cars in 2026 (powertrains, range, pricing, and what's new).

paid API x402
$0.06 · 30d 59 tx
earthquakes.use.x402atlas.com earthquakes.use.x402atlas.com
65%

Significant earthquakes — search USGS seismic events above an explicit significance-score threshold, with magnitude and provenance but no danger or probability claim.

paid API x402
$1.27 · 30d 87 tx
x402.cloudpulsepoint.com x402.cloudpulsepoint.com
65%

Run HTTP + SSL + DNS + domain-expiry in one call and return a combined health snapshot. The single pre-flight check to run before crawling, deploying to, or depending on a site — cheaper and one round-trip instead of four.

paid API x402
$1.11 · 30d 49 tx
x402.srch.best x402.srch.best
65%

Structured fiscal data for agents, paid per request with x402 v2

paid API x402
$0.04 · 30d 26 tx
dependency-risk.use.x402atlas.com dependency-risk.use.x402atlas.com
65%

Package vulnerability check — check one exact open-source dependency version or purl against OSV, enrich CVE matches with CISA KEV known-exploited signals, and report fixes, severity, and provenance.

paid API x402
$1.27 · 30d 87 tx
api.agentmercantile.com api.agentmercantile.com
65%
paid API x402
from $0.01
api.preflightstack.com api.preflightstack.com
65%

Screen up to 10 exact npm or PyPI package versions before installation. Returns a deterministic allow, review, or block decision with known-vulnerability, lifecycle, license, release-age, and npm install-script evidence.

paid API x402
from $0.02
agentreader.dev agentreader.dev
65%

OFAC sanctions screening: fuzzy-match a person/entity/vessel name (transliteration-aware - Arabic and Slavic romanization variants) or look up a crypto address against the official OFAC SDN and Consolidated lists. Returns verdict (match/pos…

paid API x402
$5.36 · 30d 27 tx
fetch.netzhandwerker.de fetch.netzhandwerker.de
65%

Fill a caller supplied JSON Schema from one web page and report source and confidence for every field.

paid API x402
$0.99 · 30d 240 tx
4yearcycle.com 4yearcycle.com
65%
paid API x402
$0.04 · 30d 2 tx
box.guardianhobgoblin.com box.guardianhobgoblin.com
65%
paid API x402
$0.01 · 30d 4 tx
cryptyx-ai.vercel.app cryptyx-ai.vercel.app
65%

Service health probe — build version, last pipeline run, current signal/composite/asset counts. Sub-second, no DB writes. The cheapest end-to-end pay-per-call check before issuing real queries.

paid API x402
$4.86 · 30d 234 tx
gateway.hillguava.xyz gateway.hillguava.xyz
65%

Current southwest monsoon advance status across India.

paid API x402
$0.13 · 30d 13 tx
k2so.wrong.systems k2so.wrong.systems
65%

Live counterparty due diligence for agent-to-agent commerce: given a domain, compose free public records (registrar RDAP, Certificate Transparency logs, TLS posture, DNS structure) into a trust scorecard an agent can use before paying an or…

paid API x402
$9.01 · 30d 2,439 tx
agent.atinamos.co.uk agent.atinamos.co.uk
65%

Independent website QA and pre-handover verification for AI agents. Submit one public website URL. Atinamos loads the real site in desktop and mobile Chromium, checks HTTP and browser failures, failed requests, console errors and warnings, …

paid API x402
$1.00 · 30d 4 tx
donate.0000402.xyz donate.0000402.xyz
65%

Pay $0.01 USDC as a small donation or a simple live x402 integration test. Optional name and message are stored publicly and shown on GET /donations. Network: Base Mainnet. Each request records one donation and returns public feed links.

paid API x402
$502.62 · 30d 78 tx
oyapicks.app oyapicks.app
65%

OyaPicks: keyword search of live prediction markets with prices

paid API x402
$1.25 · 30d 19 tx
api.terradeed.co.uk api.terradeed.co.uk
65%

Extract structured data from any URL using AI reasoning. Describe the fields you need, get Claude-validated JSON back. Built for vertical data: property listings, recruitment profiles, company intel — not commodity scraping.

paid API x402
$0.06 · 30d 2 tx
x402-factory.com x402-factory.com
65%

Cheapest endpoint: liveness plus x402 payment pipeline check — Returns ok with the server time and whether this call was paid. Use it to verify your x402 client end to end before spending on data endpoints.

paid API x402
$3.23 · 30d 134 tx
img402.dev img402.dev
65%

Image hosting API for AI agents. Upload an image, get a public CDN URL. Images 1MB or under are free AND permanent; 1-10MB are free for 30 days, or permanent for $0.01 USDC. No accounts, no API keys. Payment via x402.

paid API offline x402
$0.04 · 30d 4 tx