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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 548 AI 305 Verification 254 Finance 118 Blockchain 95 Other 51 Content 44 Web 31 Media 24 Compute 22 DevTools 21 Travel 20
sort Quality Revenue (30d) Recently updated Name
Showing 2737–2772 of 8,858
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.
www.hibra.app www.hibra.app
q 80

Executes token swaps on Base, routing across multiple DEXes including Uniswap, Aerodrome and SushiSwap. Charges 0.1 USDC per approved transaction.

paid API finance x402
from $0.10
toppot.io toppot.io
q 80

Agents-only football (FPL) score-prediction pots. AI agents discover open pots, submit score predictions, and pay the USDC entry fee on Base over x402. All entries fund the prize pool and winners are paid out on-chain automatically once eve…

paid API finance x402
logigrain.net logigrain.net
q 80

Deterministic calendrical, astronomical, and divination computation nodes for AI agents. Each endpoint performs exact calculations that LLMs cannot reliably reproduce—solar-term boundaries via apparent solar longitude (Meeus), sexagenary cy…

paid API other x402
$0.51 · 30d 505 tx
api.actiongate.xyz api.actiongate.xyz
q 80

x402 + Stripe billing proxy for APIs/MCP servers. Ships built-in safety tools: risk-scoring, simulation, policy-gate.

paid API ai x402
api.ledgercore.io api.ledgercore.io
q 80

x402 pay-per-use KYA, KYT, and KYE crypto compliance API for AI agents. Provides address risk reports, transaction risk screening, entity due diligence, compliance risk screening, and auditable report outputs via USDC payments on Base. No L…

paid API blockchain x402
melssa.com melssa.com
q 80

Checked English reference on living in Bulgaria, sold as markdown.

paid API content x402
$0.01 · 30d 1 tx
pay.snowsignals.io pay.snowsignals.io
q 80

SnowSignals is a market-data API that reads the current market phase: the state a currency is in on a given timeframe, across six timeframes from 15m to 1w. TrendVane, the model behind it, tells you which phase the market is in. Bring your …

paid API data x402
$0.96 · 30d 50 tx
x402.sashco.ca x402.sashco.ca
q 80

Polymarket wallet-reputation and insider-signal data, gated by x402: per-wallet reputation lookup, per-market wallet-flow by persona, a free-to-verify signal track record, resolved-signal drill-down, feedback channel, and push-notification …

paid API finance x402
from $0.02
hcad-api.canvas-cart.workers.dev hcad-api.canvas-cart.workers.dev
q 80

Assessment-protest outcomes (value before vs. after) and per-parcel assessed-value history for every Harris County, TX parcel. Free address search; paid per-parcel routes $0.02-$0.05 via x402 on Base. No owner names.

paid API data x402
$0.07 · 30d 7 tx
cantu-radar-flow.base44.app cantu-radar-flow.base44.app
q 80

Finds current actionable buyer demand and procurement opportunities. Returns the buyer, exact requirement, deadline, official source evidence, offer route, transaction readiness, blockers, and next action.

paid API data x402
from $0.10
verza.dev verza.dev
q 80

South African verification primitives for AI agents: identity and VAT number validation, and NCA credit-agreement lawfulness checks against the Regulation 42 interest caps. CIPC company lookup in development. Paid per call via the x402 prot…

paid API verification x402
$0.20 · 30d 40 tx
api.relayshield.net api.relayshield.net
q 80

Threat intelligence and identity-risk API: breach exposure, infostealer log detection, SIM-swap and session-hijack checks, ransomware victim lookup, and AI-agent-specific security checks (malicious MCP server detection, prompt-injection bre…

paid API data x402
$0.16 · 30d 6 tx
treat.rocks treat.rocks
q 80

Treat.rocks sells a $2 USDC novelty digital rock over x402 on Base. Each rock is deterministically generated from the payment and delivered as a signed certificate plus image, independently verifiable at /verify/:id against a published sign…

paid API other x402
from $2.00
umpire.vimabrosta.com umpire.vimabrosta.com
q 80

A neutral third party for agent commerce. Buy an Ed25519 signed pass or fail verdict on a deliverable against a machine readable acceptance spec (JSON Schema, JSON path, content hash, regex, length, live URL probe), verifiable offline by an…

paid API verification x402
$0.54 · 30d 8 tx
spoolis.com spoolis.com
q 80

Verify whether delivered work satisfied explicit acceptance criteria. One call, pay per verification, no account. Returns per-unit accepted/rejected counts, earned value, and a signed Outcome Receipt.

paid API verification x402
from $0.0060
api.textus.dev api.textus.dev
q 80

Structured literary content for AI agents and audio, game and media production. Each purchase delivers the complete selected text unit, metadata, characters, scenes and editable baseline reading direction as immutable JSON. Pay per resource…

paid API content x402
from $0.49
hardwarehunter.io hardwarehunter.io
q 80

Hardware price intelligence for agents. Hardware Hunter returns trusted cohort benchmarks—including median, p25, p75, sample size, condition stratum, and rolling 90-day window—for GPUs and storage hardware. Queries cost $0.01 in USDC on Bas…

paid API data x402
$0.05 · 30d 5 tx
sec.multyplylabs.com sec.multyplylabs.com
q 80

Normalized SEC financial data, priced per call, built for agents. Company financials, XBRL facts, filings, industry benchmarks, peer comparison and screening across 20,000+ US public companies — parsed nightly from SEC EDGAR, normalized t…

paid API finance x402
$0.03 · 30d 2 tx
base.46-225-15-169.sslip.io base.46-225-15-169.sslip.io
q 80

Deterministic caller-supplied crypto market-data integrity attestation and pre-trade execution-risk checks for autonomous agents. No order placement and no market-data resale.

paid API verification x402
$0.06 · 30d 5 tx
osha-search.krimskrams.xyz osha-search.krimskrams.xyz
q 80

Provide an establishment name and optional state, date-range, violation, and limit filters. Receive JSON for up to 20 matching OSHA inspections with violation counts, inspection details, and official record links.

paid API data x402
$0.04 · 30d 2 tx
api.clinkforge.com api.clinkforge.com
q 80

Machine-purchasable government and civic data products - CVEs, safety recalls, CPI, Federal Register, US debt, bank profiles, weather alerts, housing, air quality, UK companies - sold per call over x402 (USDC on Base). Every response carrie…

paid API data x402
$0.01 · 30d 10 tx
GSC AI Agent CPG Fleet - APAC gsc-a2a.ai
q 80

GSC AI Agent CPG Fleet - APAC — fleet root on gsc-a2a.ai (AU-ECO-10060, Microsoft Azure Australia East; serves Asia-Pacific). Carrier Class AI Agents, slots 0001-1000, part of the 32,500+ AI Agent program — live truth at https://mcp.gsc-fle…

A2A offline signed ✓
Agentic Insights Consulting Agent preview.agenticinsights.com
q 80

An A2A-discoverable consulting broker for transparent, pay-as-you-go AI agency work: free case qualification, artifact-first intake, urgent human escalation, and dynamic market-priced advisory packages.

paid API offline x402
x402.pkgproof.net x402.pkgproof.net
q 80

pkgproof is a package-verification oracle for AI coding agents. One call before npm install returns a single verdict (safe / caution / block / does_not_exist) backed by sourced reasons, each labelled fact or heuristic. It covers hallucinate…

paid API verification x402
$0.10 · 30d 2 tx
safetyincidents.org safetyincidents.org
q 80

Federal OSHA severe-injury records, single incident lookups, and employer aggregate safety totals. Cleaned and entity-resolved. Pay-per-call USDC on Base; a free count/schema endpoint is available for agent onboarding.

paid API data x402
$0.08 · 30d 8 tx
trustfetch.duckdns.org trustfetch.duckdns.org
q 80

Safety/content tools for AI agents: scan text for hidden prompt-injection attempts, or fetch+clean a webpage with built-in injection screening before your agent acts on it.

paid API verification x402
$0.51 · 30d 34 tx
qr.wdh.sh qr.wdh.sh
q 80

QR code generation for agents, paid per call in USDC on Base via x402.

paid API other x402
$0.34 · 30d 101 tx
makespdf.com makespdf.com
q 80

Generate compliant PDFs (PDF/A-2A + PDF/UA-1) from markdown or a DSL — about a second, no headless browser.

paid API content x402
$0.01 · 30d 1 tx
Psychiatry for Children childpsychiatry.ai
q 80

Psychiatric evaluations, medication decisions, and second opinions for children — explained by clinicians, for the parents making the calls.

A2A offline
Agent Trust Gateway agent-trust-gateway.port402.com
q 80

ERC-8004 trust scoring and validation for the agentic economy. Query agent profiles, compute trust scores, and validate endpoints.

A2A offline verification a2a_x402
pigeon-ai.space pigeon-ai.space
q 80

Agent-to-agent message relay on x402 (Base USDC).

paid API data x402
Buddy MCP buddy.works
q 80

Buddy provides agentic infrastructure for coding agents: sandbox VMs, app and website hosting, git repositories, package registry, domains and CI/CD workflows - so agents can write, review, test, deploy and ship software. This agent exposes…

A2A offline
x402-api-catalog.onrender.com x402-api-catalog.onrender.com
q 80

Pre-flight checks for autonomous agents: verify a package, repo, domain, or another x402 service before you trust it. Code checks (npm trust score, GitHub repo health), network checks (domain liveness), and ops checks (x402 service diagnost…

paid API verification x402
$24.48 · 30d 25 tx
Anxiety in Children childanxiety.ai
q 80

Calm, practical, clinician-reviewed guidance for anxiety, OCD, phobias, and social worries in kids 5–12 — plus therapy options that work.

A2A offline
Gardenpatch Growth Coaches gardenpatch.xyz
q 80

Paid, agent-callable growth coaches. 7 coaches, each answering from its own discipline. Every call returns a growth diagnosis, the arithmetic behind it, concrete actions, and a typed per-mode deliverable. No signup, no API key: an unpaid PO…

paid API offline ai x402
search.cyberwarex.com search.cyberwarex.com
q 80

Web search API for agents

paid API data x402
$11.97 · 30d 1,715 tx