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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 1153–1188 of 3,227
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.
AARN api.aarn.space
q 71

Paid x402-gated web reading, extraction and research.

paid API live data x402
$2.04 · 30d 14 tx
Claim Grounding claim-grounding.prospectintel.workers.dev
q 71

Agent-runtime claim grounding. Fast gate is paid. Deep Research is a confirmed separate call.

paid API offline x402
$1.60 · 30d 10 tx
witness witness.outbid.sh
q 71

Paid, attributable, perishable observation of public web facts over x402.

paid API offline data x402
$0.83 · 30d 159 tx
Agent News Hub news.netzhandwerker.de
q 71

News events with source count and citations.

paid API offline x402
$7.17 · 30d 3,578 tx
Vektorwerk vektor.netzhandwerker.de
q 71

Local vector and deterministic recommendation tools.

paid API offline x402
$7.17 · 30d 3,578 tx
Vektorwerk vektor.halowerk.com
q 71

Local vector and deterministic recommendation tools.

paid API offline x402
$7.17 · 30d 3,578 tx
HustleOS Agent Utilities hustleos-x402-feed.coolbladez05.workers.dev
q 71

Policy-filtered work discovery, landing-page evidence, catalog gateway-health snapshots, agent-discovery readiness audits, and cross-market paid-work radar for autonomous agents.

paid API offline x402
$0.00 · 30d 3 tx
Agent News Hub news.halowerk.com
q 71

News events with source count and citations.

paid API offline x402
$7.17 · 30d 3,578 tx
MGO Gas Optimizer api.mgo.chain-ops.xyz
q 71

x402-native API that compares real-time gas prices across up to 9 EVM chains. Built for trading agents, DeFi bots, and AI agents optimizing transaction costs.

A2A offline x402
$0.00 · 30d 1 tx
wallet-aml-screen wallet-aml-screen.relayhop.workers.dev
q 71

x402 pay-per-call wallet compliance — OFAC sanctions screening, ENS/SNS name resolution, on-chain wallet intel on Base. No account, no API key.

paid API offline x402
$0.04 · 30d 12 tx
nba-odds-gap nba-odds-gap.relayhop.workers.dev
q 71

x402 pay-per-call NBA cross-venue prediction-market odds gap: Polymarket vs Kalshi implied probability on 2026 NBA championship markets, on Base. No account, no API key.

paid API offline x402
$0.04 · 30d 12 tx
AgentToll agenttoll.app
q 71

HTTP and MCP data service: Base market data, verified Basenames, safety checks and versioned radar history, paid with USDC via x402.

paid API offline data x402
$0.52 · 30d 151 tx
jurat www.jurat.dev
q 71

we remember, we watch, we prove. Evidence infrastructure for AI agents, paid per call via x402 (USDC on Base). No accounts, no API keys.

paid API offline x402
$0.20 · 30d 40 tx
dns-email-hygiene dns-email-hygiene.relayhop.workers.dev
q 71

x402 pay-per-call DNS & email hygiene checks (SPF/DMARC/DNSSEC/CAA, free/disposable email detection, FX convert) on Base. No account, no API key.

paid API offline x402
$0.04 · 30d 12 tx
agent-payment-error-corpus agent-payment-error-corpus.mtree.workers.dev
q 71

Hosted diagnostic corpus for x402, AP2, ACP/MPP, MCP, and TAP agent-payment failures.

paid API offline x402
$0.20 · 30d 4 tx
wellknown-audit-corpus wellknown-audit-corpus.mtree.workers.dev
q 71

Hosted agent-readiness corpus. Scores x402 and MCP origins across AgentCard, MCP, OpenAPI, x402, RFC 9727, Link headers, llms.txt, health, schema, and pricing metadata.

paid API offline x402
$0.20 · 30d 4 tx
odood odood.com
q 71

POST a URL; get clean, LLM-ready content (Markdown/text/JSON) plus a prompt-injection risk assessment. Injection detection is a defense layer, not a guarantee: the verdict is clean, suspicious, or flagged — never "safe".

paid API offline x402
$0.00 · 30d 1 tx
free-api-resell free-api-resell.relayhop.workers.dev
q 71

x402 pay-per-call access to free public data APIs (DeFi yields, prediction markets, crypto candles) on Base. No account, no API key.

paid API offline x402
$0.04 · 30d 12 tx
DELTA Witness delta-witness-api.ruphussten.workers.dev
q 71

Independent public page-state evidence and deterministic preflight verification before procurement, checkout, vendor review, publishing and other consequential agent actions. Designed for repeatable audit checkpoints in browser and workflow…

paid API offline x402
$0.03 · 30d 1 tx
Velvet Unicorn vu.velvetdao.xyz
q 71

AI DeFi agent. $0.01 USDC per call via x402.

paid API offline x402
$0.06 · 30d 6 tx
RobotsShop Trust Index api.robotsshop.io
q 71

Independent quality layer for x402 agent-payments: liveness, protocol correctness, spam, payTo integrity, longitudinal reliability.

paid API offline x402
$0.16 · 30d 7 tx
SatsSignal Demand Radar srv1334799.hstgr.cloud
q 71

Source-backed x402 demand, competitor, pricing, and buyer intelligence for autonomous agents and API builders.

paid API offline x402
$0.17 · 30d 17 tx
DailyDrop Shield Agent dailydrop-five.vercel.app
q 71

Proof of Presence agent on Celo and Base. Verify real humans by on-chain daily streak. Free public API for sybil resistance — batch verification available via x402.

A2A offline x402
$1344.00 · 30d 96 tx
RobotsShop Trust Index api.analoghubris.com
q 71

Independent quality layer for x402 agent-payments: liveness, protocol correctness, spam, payTo integrity, longitudinal reliability.

paid API offline
$0.16 · 30d 7 tx
jurat jurat.dev
q 71

we remember, we watch, we prove. Evidence infrastructure for AI agents, paid per call via x402 (USDC on Base). No accounts, no API keys.

paid API offline x402
$0.20 · 30d 40 tx
x402-endpoint-risk-corpus x402-endpoint-risk-corpus.mtree.workers.dev
q 71

Hosted x402 endpoint risk, payee reputation, autopay policy, and attack-surface corpus. Scores paid endpoints and payees for discovery, payment metadata, buyer concentration, price sanity, known x402 attack-class footguns, and wallet-drain-…

paid API offline x402
$0.20 · 30d 4 tx
AgentToll www.agenttoll.app
q 71

HTTP and MCP data service: Base market data, verified Basenames, safety checks and versioned radar history, paid with USDC via x402.

paid API offline x402
$0.52 · 30d 151 tx
Polyform polyform.polyform-org.workers.dev
q 71

Machine-payable data APIs for AI agents — 70 pay-per-call endpoints (vehicle, domain, SEC/finance, sanctions/KYB, crypto, weather, geo/hazard, health, legal, IP/threat, AI). USDC on Base via x402. No account, no API key.

paid API offline x402
$0.00 · 30d 1 tx
TrustBoost PII Sanitizer api.trustboost.dev
q 71

TrustBoost sanitizes PII from text before it reaches LLMs. Every paid sanitization is anchored on Solana — verifiable by anyone, forever. The only PII sanitizer with on-chain proof.

paid API offline ai x402
$3.14 · 30d 19 tx
Polyform api.polyform.org
q 71

Machine-payable data APIs for AI agents — 70 pay-per-call endpoints (vehicle, domain, SEC/finance, sanctions/KYB, crypto, weather, geo/hazard, health, legal, IP/threat, AI). USDC on Base via x402. No account, no API key.

paid API offline data x402
$0.00 · 30d 1 tx
zaref zaref.dev
q 71

South African reference data for AI agents: 33 verified series, 29 calculators, history, task-shaped answers (payroll, income tax, VAT, wage checks, working days), batch fetch and change-alert webhooks, paid per call via the x402 protocol (…

paid API offline data x402
$0.20 · 30d 40 tx
Agent Embassy aemb.pro
q 71

Agents pay for work and prove what happened.

paid API offline x402
$38.10 · 30d 36 tx
Agent Embassy agent-embassy.fly.dev
q 71

Agents pay for work and prove what happened.

paid API offline verification x402
$38.10 · 30d 36 tx
The Undesirables TCG Oracle oracle.the-undesirables.com
q 71

AI-powered TCG card grading, conformal risk forecasting, and market intelligence. 446K+ products across 25+ games. 31 API endpoints. Pay-per-call via x402 USDC on Base. Hosted MCP endpoint: https://mcp.the-undesirables.com

paid API offline x402
$1.00 · 30d 10 tx
AgentToll agenttoll-pi.vercel.app
q 71

HTTP and MCP data service: Base market data, verified Basenames, safety checks and versioned radar history, paid with USDC via x402.

paid API offline x402
$0.52 · 30d 151 tx
AgentBridge api.060504.shop
q 71

China data marketplace on Base - x402 micropayments for AI agents to query statistics, policies, and enterprise data.

paid API offline domain verified x402
$5.17 · 30d 88 tx