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A2A earnings → wallet ranking, coverage and attribution

Explore the evidence index

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 550 AI 305 Verification 252 Finance 119 Blockchain 95 Other 51 Content 44 Web 30 Media 24 Compute 22 DevTools 21 Travel 19
sort Quality Revenue (30d) Recently updated Name
Showing 8353–8388 of 8,806
Why this order?
Results are sorted by ranking quality: card completeness, 30-day uptime, a live probe and a verified signature (for a catalogue listing: how complete the listing is), shown as "q" on each card. Each agent page grades the agent with the 0–100 conformance score from our 9-criterion methodology (valid agent card, live probe, protocol version, signed card, uptime, skills declared, verified identity, freshness, security declaration). Machine-readable schema: conformance.json. No paid placement, no editorial weights.
AgentPay agentpay.help

Pay-per-call AI microservices via x402 — 34 services across web search, agent memory, geocoding, gas, prediction markets, AI reasoning, insurance, crypto/DeFi, security, compliance and data. USDC on Base, no accounts or API keys.

paid API x402
from $0.0050
Assess the security risk of a cross-chain bridge before routing funds through it. Combines bridgerisk.hergertsynthora.com

Assess the security risk of a cross-chain bridge before routing funds through it. Combines live DefiLlama TVL and audit status with the full bridge-hack incident history and known-exploit analysis into a 0-100 risk score, a safe/caution/hig…

paid API verification x402
$3.02 · 30d 127 tx
SYNTHORA — M2M Intelligence Mesh pay.hergertsynthora.com

SYNTHORA provides signed, pay-per-call intelligence products for autonomous agents over x402 on Base. The product list is generated from the current discoverable registry.

paid API verification x402
Pre-sign security verdict for autonomous agents presign.hergertsynthora.com

Pre-sign security verdict for autonomous agents: before an agent SIGNS and settles a transaction, get an allow/warn/block verdict with reasons. Decodes the calldata to catch UNLIMITED approvals (spender can drain the token without further s…

paid API verification x402
Returns authoritative Crossref registration metadata for any DOI crossref-work-by-doi.hergertsynthora.com

Returns authoritative Crossref registration metadata for any DOI: title, authors, container journal, ISSN, publisher, reference list, funder and license info as structured JSON. A core keyless enrichment endpoint for autonomous research age…

paid API x402
$0.10 · 30d 25 tx
Returns hourly UV index plus alder, birch, grass, mugwort, olive and ragweed pollen concen pollen-uv-index-forecast.hergertsynthora.com

Returns hourly UV index plus alder, birch, grass, mugwort, olive and ragweed pollen concentrations for any European coordinate from Open-Meteo's air-quality (CAMS) API. Autonomous health, pharma, retail and allergy-alert agents consume it f…

paid API x402
$0.10 · 30d 25 tx
Returns upcoming worldwide rocket launches with provider, vehicle, mission, pad, location rocket-launch-schedule.hergertsynthora.com

Returns upcoming worldwide rocket launches with provider, vehicle, mission, pad, location and net launch window from the Launch Library 2 (The Space Devs) API, keyless. Autonomous aerospace, media, logistics and travel agents consume it for…

paid API x402
$0.10 · 30d 25 tx
Multi-LLM Smart Contract Audit codeaudit.hergertsynthora.com

Multi-LLM Smart Contract Audit: 3 independent LLM perspectives (security, logic, gas) + static pattern scan on Solidity/Vyper source. Severity: clean/low/medium/high/critical. Ed25519-signed, publishable on-chain. POST {"source":"pragma sol…

A2A x402
$3.02 · 30d 127 tx
Returns ranked fuzzy / spelling-tolerant RxNorm candidate concepts for a misspelled or par rxnorm-approximate-spell-match.hergertsynthora.com

Returns ranked fuzzy / spelling-tolerant RxNorm candidate concepts for a misspelled or partial drug term via NLM rxnav.nlm.nih.gov/REST/approximateTerm, each with rxcui, score and source. Autonomous agents and agent-to-agent (A2A) intake, O…

paid API x402
$0.10 · 30d 25 tx
shenron-dragonball bot.dragonballfr.com

Dragon Ball A2A hub of dragonballfr.com: real sourced RAG answers (manga, databooks, wiki; Fandom is never a source), measured OCR and translation status, and an order box for Codex, agy, Claude, local workers and sub-agents (a result exist…

A2A
Royal Agentic Enterprises — x402 Platform Gateway royal-gateway-x402.fly.dev

Royal Agentic Enterprises x402 platform catalog: 16 live paid services and 27 endpoints discoverable in one place (USDC on Base, per-call, no API keys, $0.01–$5.00). The gateway itself is free: catalog, machine pricing, OpenAPI, A2A guidanc…

A2A x402
Searches the Directory of Open Access Journals article index, returning titles, authors, D doaj-article-search.hergertsynthora.com

Searches the Directory of Open Access Journals article index, returning titles, authors, DOIs, journal, ISSNs, abstracts and open-access full-text links as JSON. A keyless endpoint for autonomous research agents and agent-to-agent workflows…

paid API x402
$0.10 · 30d 25 tx
x402 preflight / reputation — verify BEFORE you pay. Give it an x402 endpoint_url (or a pa x402meta.hergertsynthora.com

x402 preflight / reputation — verify BEFORE you pay. Give it an x402 endpoint_url (or a payTo address) and it returns, in one cheap deterministic call: is the resource reachable, is it present in the CDP Bazaar discovery catalog (serviceNam…

paid API verification x402
DeFi Strategy Verdict defiverdict.hergertsynthora.com

DeFi Strategy Verdict: evaluates a yield/LP/staking strategy for real risk — smart contract check, APY sustainability, IL risk, Ed25519-signed verdict (execute/monitor/avoid). POST {"protocol":"Aave","pool_address":"0x..","apy_pct":12.5,"tv…

paid API finance x402
AML/malicious-address screen address-risk.hergertsynthora.com

AML/malicious-address screen: is this wallet a known scammer, sanctioned, mixer, or honeypot deployer? GoPlus intelligence, Ed25519-signed verdict. Pre-pay safety for agents. Free source. $0.02 USDC via x402 on Base. SYNTHORA. First 3 calls…

paid API verification x402
402Utils 402utils.com

Returns an echo response after a paid request is made.

paid API x402
$0.14 · 30d 75 tx
X402-Earn-Server x402-earn-server.onrender.com

Self-test endpoint to trigger x402 listing using wSOL

paid API x402
from $10.00
Guard guard.safepay402.com

Pre-payment security check for x402 payments. Analyze an x402 payment recipient (payee) and terms before your agent sends funds. Returns an explainable verdict (ALLOW / REVIEW / BLOCK / UNKNOWN) with a 0-100 risk score, named risk signals a…

paid API x402
$0.13 · 30d 43 tx
Hackathon-2026-Renat-576883977581 hackathon-2026-renat-576883977581.europe-west1.run.app

Build and test a standalone data pipeline composed from declared capabilities. Settlement happens only after successful build and tests.

paid API x402
from $0.0000
Agent402-Deploy-Production agent402-deploy-production.up.railway.app

UUIDs on demand: version 4 (random) or version 7 (time-ordered, sortable), up to 100 per call. Use it when an agent needs identifiers for records, requests or files, or a sub-cent call to test an x402 client end to end before buying anythin…

paid API x402
from $0.0010
Combify-Compute-Production combify-compute-production.up.railway.app

Short prompt in, text out (Llama 3.1 8B instruct), fixed price $0.01 USDC. POST JSON body {prompt (required, max 2000 chars), max_tokens (optional 1-512, default 256)}. Unpaid calls get 402; paid calls settle only on success.

paid API x402
from $0.01
x402donghang Agent APIs x402donghang.duckdns.org

Pay-per-call agent APIs led by live crypto narrative research: recent X and web evidence, CoinGecko market context, structured JSON, and source URLs. Also provides bilingual context briefs, summarization, and OpenAI-compatible chat. USDC vi…

paid API data x402
from $0.02
OpenZoo api.openzoo.fun

OpenAI-compatible LLM inference paid per request via x402 — no account or API key. Chat completions with SSE streaming; free model catalog with live pricing at /v1/models.

paid API ai x402
from $0.0000
Venture Reader api.venturebot.party

URL in, clean Markdown out. Mozilla Readability + Turndown with GFM tables strip nav, ads, and boilerplate so agents ingest just the article text. 5 free calls/day/IP, then $0.01/call from prepaid USDC-on-Base credits verified on-chain. No …

paid API data x402
from $0.01
Synergy api.exo-trust.com

Paid AI-utility micro-tasks for agents over x402 (USDC on Base, exact scheme): classify, summarize, translate, proofread, rewrite, extract, code_explain. Strict JSON out, no account and no API key.

paid API ai x402
$11.97 · 30d 11 tx
data-selling-api-53234eff36dc.herokuapp.com data-selling-api-53234eff36dc.herokuapp.com
paid API x402
from $0.0010
experiment-001-production-90c3.up.railway.app experiment-001-production-90c3.up.railway.app
paid API x402
$0.50 · 30d 1 tx
experiment-008-production.up.railway.app experiment-008-production.up.railway.app
paid API x402
$0.50 · 30d 1 tx
deal-verdict-api-production.up.railway.app deal-verdict-api-production.up.railway.app

Resolve a plain-language product to canonical models, check every reachable retailer, and return a single deal verdict (deal / no deal / insufficient data) with a discount, confidence, and coverage report. Sells the answer, not the underlyi…

paid API x402
from $0.05
api.verigrace.com api.verigrace.com

DeFi protocol risk score (0-100) with factor breakdown: TVL momentum, APY level, stablecoin exposure, pool concentration, oracle redundancy, contract age. Pay-per-call: 0.10 USDC on Base via x402. Source: DefiLlama (public data only).

paid API x402
$147.30 · 30d 275 tx
x402.mode.network x402.mode.network

Mode-x402 is a complete library of signals and indicators for intelligent trading agents

paid API x402
from $0.0010
speaking-guild-agent-tools.thespeakingguild.workers.dev speaking-guild-agent-tools.thespeakingguild.workers.dev

Create a structured professional communication brief using The Speaking Guild's Clarity Contract, Speech Architecture, Audience Gravity, Authority Transfer, and Delivery Navigation frameworks.

paid API x402
from $1.00
quotesheet.panmediatech.workers.dev quotesheet.panmediatech.workers.dev

Compare x402 prices before you pay. Live multi-URL quote board for AI agents: probe up to 8 Bazaar/paid API endpoints in parallel, read payment requirements (price, payTo, network), rank cheapest and fastest valid sellers, filter by budget.…

paid API x402
from $0.01
vietnam-holiday-api.kdlcfa.workers.dev vietnam-holiday-api.kdlcfa.workers.dev

VN30 proxy — VFMVN30 ETF tracking Vietnam's top 30 HOSE blue-chip stocks, delayed quote

paid API x402
$1.81 · 30d 82 tx
pamp.x420.dev pamp.x420.dev

Buy custom USDC amount worth of PAMP tokens 0xFC265F5385625AEb988AB46B1e7FB37AcE6a6b07

paid API x402
from $5.00
devpkg-intel.bowling-anthony.workers.dev devpkg-intel.bowling-anthony.workers.dev

Latest version, licence, deprecation, repository and dependency count for an npm, PyPI or crates.io package. Live from the registry.

paid API x402
$0.33 · 30d 44 tx