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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 310 AI 118 Verification 90 Finance 71 Blockchain 50 Other 27 Content 20 Compute 9 Storage 3 Media 3 Infrastructure 3 Social 2
sort Quality Revenue (30d) Recently updated Name
Showing 1729–1764 of 3,228
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.
verify.camelai.io verify.camelai.io
q 65

Verify if an email address is valid and likely deliverable. Send {"email": "user@example.com"}

paid API x402
$0.01 · 30d 6 tx
datoka-api.bhazarstudio.workers.dev datoka-api.bhazarstudio.workers.dev
q 65

Datoka API: a portable signed commitment to a client-declared API exchange for response handoffs, archived decision inputs and change investigations. 0.002 USDC per receipt; offline verification is free. Keep original bytes locally. Does no…

paid API x402
$2.82 · 30d 10 tx
402sentinel.com 402sentinel.com
q 65

RWA risk gate: score a TOKENIZED ASSET (treasury, stock, credit) BEFORE an agent buys it. POST {target:{payto_address:<token contract>, network:eip155:1|eip155:8453}} returns 0-100 risk, allow/review/block, is_permissioned_security and sign…

paid API x402
$0.17 · 30d 14 tx
api.fairseal.io api.fairseal.io
q 65

Anchor an AI agent decision or audit record to Base mainnet. Submit {schema, payload_hash (SHA-256 hex, 64 chars), metadata}; service queues into a Merkle batch and returns a receipt with pending_anchor status immediately. Full Merkle proof…

paid API x402
$0.43 · 30d 72 tx
compute.memoryapi.org compute.memoryapi.org
q 65

Rent-and-mine arbitrage: GPU rental cost vs best mining revenue.

paid API x402
$1.04 · 30d 108 tx
www.rwakernel.com www.rwakernel.com
q 65

Resolve an EVM token to registry identity. A match is not issuer verification.

paid API x402
$0.03 · 30d 3 tx
api.monpham.work api.monpham.work
q 65

Search X/Twitter tweets by query. POST body: {query, limit}.

paid API x402
$0.33 · 30d 26 tx
finance.toonhaus.dev finance.toonhaus.dev
q 65

Trending symbols

paid API x402
$0.21 · 30d 77 tx
reel24-web-792007954609.us-central1.run.app reel24-web-792007954609.us-central1.run.app
q 65

Reel24: commission one 4-shot AI episode (~32 s) for up to $9.99, charged only when the finished film passes QA — except on Solana and Algorand, where you're charged when you sign (those payments can't be held) and the operator refunds you …

paid API x402
$20.31 · 30d 7 tx
page.fluidrack.com page.fluidrack.com
q 65

Publish ephemeral page

paid API x402
$0.14 · 30d 14 tx
research.appliedidentities.com research.appliedidentities.com
q 65

Three composite AI readiness scores with history

paid API x402
$0.04 · 30d 8 tx
stable-enrich-git-mason-migrate-off-prices-map-merit-systems.vercel.app stable-enrich-git-mason-migrate-off-prices-map-merit-systems.vercel.app
q 65

Exa Search - Neural search across the web

paid API x402
$1338.07 · 30d 53,028 tx
health.memoryapi.org health.memoryapi.org
q 65

WHO Global Health Observatory — life expectancy, obesity, alcohol, air pollution by country.

paid API x402
$1.04 · 30d 108 tx
api.healthparse.io api.healthparse.io
q 65

Search ambulatory surgical centers (ASCs) by state, CCN, or name. Answers: which ASCs are in a given market? Source: CMS ASC cost data.

paid API x402
$1.79 · 30d 48 tx
data-gateway.jonathan-royere.workers.dev data-gateway.jonathan-royere.workers.dev
q 65

Lookup WHOIS records and domain availability in JSON format. Provide the domain name via ?domain=example.com to query registrar, status, and expiration dates.

paid API x402
$0.01 · 30d 2 tx
agent.memoryapi.org agent.memoryapi.org
q 65

Get ERC-8004 registration JSON for memoryapi.org — a complete example of an AI agent registration file with 28 MCP services and x402 support.

paid API x402
$1.04 · 30d 108 tx
api.forum-labs.com api.forum-labs.com
q 65

Deep endpoint trust/QoS report for an x402 endpoint. Everything the trust score returns PLUS history detail: the full payment-terms drift log (including custody/payTo changes), the discovery/listing timeline across directories, the paid-del…

paid API x402
$0.04 · 30d 2 tx
cron.memoryapi.org cron.memoryapi.org
q 65

Retrieve change alerts for monitored URLs. Returns list of detected changes with timestamps.

paid API x402
$1.04 · 30d 108 tx
econ.memoryapi.org econ.memoryapi.org
q 65

U.S. County Business Patterns — number of businesses, employees, and payroll by industry (NAICS) and state.

paid API x402
$1.04 · 30d 108 tx
gibbr.app gibbr.app
q 65

Translation tuned for skilled-trade work: HVAC, refrigeration, electrical and construction terms stay correct instead of collapsing into a generic word. Handles text typed fast without accent marks.

paid API x402
$49.37 · 30d 287 tx
market.memoryapi.org market.memoryapi.org
q 65

Institutional investor SEC Form 13F filings. Look up any institution by CIK or name to get their latest 13F filing date and link.

paid API x402
$1.04 · 30d 108 tx
supplier-risk-api-production.up.railway.app supplier-risk-api-production.up.railway.app
q 65

Supplier and vendor risk score for any company domain. Returns a 0-100 stability score, risk tier, and named risk flags, with subsignals: domain age/expiry (WHOIS), TLS certificate status, DNS health (A/MX/SPF/DMARC), and 30-day news sentim…

paid API x402
$0.45 · 30d 3 tx
agent-drift-api-production.up.railway.app agent-drift-api-production.up.railway.app
q 65

Register a golden test case that monitors an API endpoint for behavioral drift (compares live responses against expected output). Returns the created test as JSON.

paid API x402
$0.03 · 30d 23 tx
banking-compliance-production.up.railway.app banking-compliance-production.up.railway.app
q 65

Search the federal banking compliance rules database. 56 rules across Reg DD, Reg Z, UDAAP, ECOA, BSA/AML, and more.

paid API x402
$0.12 · 30d 25 tx
uk-company-check.fly.dev uk-company-check.fly.dev
q 65

Is this UK company legit and safe to deal with? One-call due-diligence check from Companies House: profile, directors and their track record at other companies (phoenix-company check), beneficial owners (PSCs), charges, insolvency, overdue …

paid API x402
$1.38 · 30d 7 tx
agentspec-one.vercel.app agentspec-one.vercel.app
q 65

Return a compact agent-readiness score for OpenAPI or MCP input.

paid API x402
$0.08 · 30d 4 tx
x402-vault-service.vercel.app x402-vault-service.vercel.app
q 65

Withdraw from the Ink Balanced Yield USDC vault (flat $0.01 gas fee).

paid API x402
$28.86 · 30d 20 tx
x402-kyb-api.vercel.app x402-kyb-api.vercel.app
q 65

KYB entity diligence pack — OFAC SDN fuzzy screen + GLEIF LEI match/resolve in one agent JSON. Directional only; not clearance.

paid API x402
$5.33 · 30d 13 tx
canary-production-f6b6.up.railway.app canary-production-f6b6.up.railway.app
q 65

Current Base mainnet block height and base fee per gas in wei, read from the chain at request time

paid API x402
$0.02 · 30d 2 tx
depscout.vercel.app depscout.vercel.app
q 65

Check an npm package, PyPI package, or GitHub repo and return a DepScout install verdict.

paid API x402
$0.08 · 30d 4 tx
ai-micro-o0w12oaf0-nic-s-projects-33d61015.vercel.app ai-micro-o0w12oaf0-nic-s-projects-33d61015.vercel.app
q 65

Hash a string with SHA-256 and return hex plus a short prefix. Deterministic, no network.

paid API x402
$0.37 · 30d 22 tx
api.tcgapi.dev api.tcgapi.dev
q 65

TCGPlayer current prices for every card in a set — useful for set value tracking and sealed Pokemon / Magic / Yu-Gi-Oh product pricing.

paid API x402
$0.04 · 30d 8 tx
api.whitemagic.dev api.whitemagic.dev
q 65

WhiteMagic continuity-receipt verification: POST a signed receipt bundle and receive a verdict (TRUSTED / PROVISIONAL / INSUFFICIENT_EVIDENCE / UNTRUSTED) with coded errors and an optional signed verification receipt. Verification is statel…

paid API x402
$5.19 · 30d 28 tx
hello-world-x402.vercel.app hello-world-x402.vercel.app
q 65

Returns "Hello World" after payment verification

paid API x402
$0.02 · 30d 17 tx
store-production-8add.up.railway.app store-production-8add.up.railway.app
q 65

Census of automated x402 monitors and index crawlers observed polling a Bazaar listing on Base mainnet: user-agent prefix, operator URL, stated purpose, class (monitor or crawler), quotes served in the observation week. Updated weekly from …

paid API x402
$29.56 · 30d 9 tx
predict.memoryapi.org predict.memoryapi.org
q 65

Find prediction market arbitrage across Polymarket, Kalshi, and Manifold.

paid API x402
$1.04 · 30d 108 tx