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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 472 AI 226 Verification 141 Finance 115 Blockchain 84 Other 51 Content 44 Compute 20 Web 14 Search 13 Inference 9 Media 7
sort Quality Revenue (30d) Recently updated Name
Showing 109–115 of 115
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.
api.bitrefill.com api.bitrefill.com

API to search gift cards, eSIMs and mobile top ups and pay for them in USDC via x402, priced per call and with no account. Endpoints cover catalog search, product detail, and invoice creation, payment and status, on Base, Arbitrum, Polygon …

paid API finance x402
$633340.28 · 30d 4,890 tx
TNT House Risk-Data API tnt-audit.com

Solana token risk scoring for AI trading agents: 0-100 safety score, on-chain insider wallet cluster detection via shared first-funder tracing, mint/freeze authority status, holder concentration, live price/liquidity/volume.

paid API finance x402
from $0.02
Fia Signals Contract Risk x402.fiasignals.com

Native x402 pre-swap token safety and smart contract risk agent. Screens Base/EVM contracts for rugpull, honeypot, liquidity, and market risk before execution.

paid API finance x402
$0.84 · 30d 6 tx
api.deepbluebase.xyz api.deepbluebase.xyz

x402-protected paid API on api.deepbluebase.xyz (discovered via Coinbase facilitator).

paid API finance x402
from $0.01
x402toll.com x402toll.com

Tollbooth — 59 verified tax, finance, lending, real-estate, retirement, investing, crypto and business calculators for AI agents, paid per call in USDC on Base mainnet (no account, no API key; $0.01–$1.00 per call via the Coinbase CDP facil…

paid API finance x402
$1.13 · 30d 10 tx
Wintergreen x402 Content Broker x402.wintergreen.uk

Live Hyperliquid quant data (funding rates, OHLCV, regime classification, correlation matrices), raw Polymarket odds, proprietary weather-forecast calibration and oil geopolitical event-study feeds, quant methodology packs, and x402 endpoin…

paid API finance x402
from $0.0010
Colombia TRM x402.lagaceta.net

Official Superintendencia Financiera de Colombia daily USD/COP (TRM) as a prepaid x402 GET. Source datos.gov.co dataset mcec-87by. $0.005 USDC on Base.

paid API finance x402
from $0.0050