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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 1117–1152 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.
GENESIS Agent Tools genesis-agent-tools.genesisagenttools.workers.dev
q 74

Five pay-per-call x402 agent APIs on Base USDC: Release Guardian (cross-contract release preflight), Workflow Runner, Asset Intelligence, Research & Evidence, Agent Assurance.

paid API offline x402
$0.49 · 30d 14 tx
HALOWERK iotwerk iot.halowerk.com
q 74

HALOWERK iotwerk. Bezahlung über x402 in USDC auf Base Mainnet.

paid API offline x402
$7.17 · 30d 3,578 tx
HALOWERK frachtwerk fracht.halowerk.com
q 74

HALOWERK frachtwerk. Bezahlung über x402 in USDC auf Base Mainnet.

paid API offline x402
$7.17 · 30d 3,578 tx
Obol obol.danieldutoit.net
q 74

Verified blockchain-data lookups, paid per request with USDC on Base.

paid API offline x402
$0.01 · 30d 10 tx
HALOWERK depwerk dep.halowerk.com
q 74

HALOWERK depwerk. Bezahlung über x402 in USDC auf Base Mainnet.

paid API offline x402
$7.17 · 30d 3,578 tx
ChainRay chainray.online
q 74

On-chain intelligence for AI agents: 93 logical paid capabilities / 94 HTTP route templates across 57 chains (44 EVM + 13 non-EVM), with x402 payments, MCP transport, cross-chain context, safety analysis, and verifiable evidence.

paid API offline x402
$0.73 · 30d 53 tx
Pa1m SEO seo.hypa1m.xyz
q 73

Website SEO auditing across 200 rules and 20 categories, paid per call in USDC on Base via x402.

A2A offline x402
$0.15 · 30d 2 tx
Pa1m Reddit reddit.hypa1m.xyz
q 73

Reddit reads and authenticated writes for AI agents, paid per call in USDC on Base via x402.

A2A offline x402
$0.15 · 30d 2 tx
47620 Multichain Data API 47620.xyz
q 73

Pay-per-call blockchain data and pre-payment safety/risk checks for autonomous agents, across Solana, Base and Polygon. One MCP server, neutral tools with an explicit `chain`. Settles over x402 (USDC on any of the three chains) with no acco…

paid API offline x402
$0.13 · 30d 19 tx
GameDataKit api.borisinc.com
q 73

Live Steam market intelligence for AI agents: top sellers by region, value-ranked deals, live player counts, review scores, owner estimates. Pay per call in USDC via x402 (eip155:8453) — no account, no API key. Also available as a paid MCP …

paid API offline x402
$100.07 · 30d 35 tx
CIV Commodity Data data.lagoontechsystems.com
q 73

x402-paid HTTP API for cocoa, coffee, sugar, cotton, and cashew commodity data. First-mover Côte d'Ivoire farmgate prices (CCC decrees), ICE Futures US settlements, CFTC COT positioning, USDA reports, and historical trends. No API keys — US…

paid API offline x402
$0.10 · 30d 10 tx
MENAPulse mena.lonestaroracle.xyz
q 73

Middle East and North Africa macro and geopolitical stress pulse (IMF macro, FX and pegs, Brent and natural gas)

paid API offline x402
$50.27 · 30d 759 tx
DeFi Intel Agent Gateway defi-intel-agent-gateway.gg-neo15.workers.dev
q 73

Paid DeFi data tools via x402 (USDC on Base): 40 edge microservices — stablecoin supply, protocol health, research verify, web scraping/markdown, JSON/SQL/code repair, token counting, EVM security (rugcheck, decompile), compliance (OFAC, VA…

paid API offline x402
$0.61 · 30d 43 tx
Walcert Agent walcert.globalscoreagent.com
q 73

ERC-8004 agent on Celo (agentId 9699) by Global Score Agent. Issues A–F wallet-maturity certificates via real-time analysis (origins, activity, multichain, portfolio). Agent-to-agent HTTP JSON; full certificates settle with x402 (0.05 USDC …

paid API offline x402
$1.25 · 30d 25 tx
Kallipolis Proof proof.platoskallipolis.com
q 73

Evidence resolver for domains, autonomous agents, protocols, and Base accounts.

paid API offline x402
$0.14 · 30d 14 tx
Fanfare fanfare-api.fly.dev
q 73

Sports experience API for AI agents — pay-per-call in USDC on Base. Combines live schedules, scores, standings, and player stats across MLB, NBA, WNBA, NHL, and NFL with trip-planning bundles that include Ticketmaster tickets, Duffel flight…

paid API offline x402
$1.68 · 30d 59 tx
AgentPay Store agentpaystore.com
q 73

x402-native marketplace of paid AI agents. Discover, hire, and pay specialist agents in USDC on Base L2.

paid API offline x402
$49.37 · 30d 287 tx
Fanfare mlb-stats-api.fly.dev
q 73

Sports experience API for AI agents — pay-per-call in USDC on Base. Combines live schedules, scores, standings, and player stats across MLB, NBA, WNBA, NHL, and NFL with trip-planning bundles that include Ticketmaster tickets, Duffel flight…

paid API offline x402
$1.68 · 30d 59 tx
Wallet Labels MCP wallet-labels-mcp.mtree.workers.dev
q 73

Three pay-per-call x402 endpoints for EVM wallet labels: wallet/labels ($0.05 — ENS + OFAC + Tornado + ERC-20 + public-registry), wallet/risk_score ($0.10 — composite 0–100 risk), labels/by_category ($0.07 — list addresses by category). Sup…

paid API offline x402
$0.20 · 30d 4 tx
Wallet Intelligence Meta-Aggregator MCP wallet-intel-meta-mcp.mtree.workers.dev
q 73

Pay-per-call x402 META-aggregator: composes 7 EVM wallet-intelligence services in parallel into one wallet dossier (labels, portfolio risk, DeFi health, MEV exposure, approvals risk, CEX flows, funding trace). Single endpoint, fail-soft per…

paid API offline x402
$0.20 · 30d 4 tx
Agent Card Validator MCP agent-card-validator-mcp.mtree.workers.dev
q 73

Pay-per-call MCP that audits + lints any x402/A2A service's discovery surfaces (agent-card.json, ai-plugin.json, openapi.yaml, mcp.json, agent-discovery). Returns a 0-100 quality score plus an improvement TODO list and a strict JSON-schema …

paid API offline x402
$0.20 · 30d 4 tx
EVM Tx Toolkit evm-tx-toolkit.mtree.workers.dev
q 73

Six premium x402 endpoints across 5 EVM chains: canonical /v1 routes plus OATP-style /tools/tx_explainer, /tools/tx_simulator, /tools/token_risk_scan aliases for transaction explainer, transaction simulation, pre-signing safety, rug risk, t…

paid API offline x402
$0.20 · 30d 4 tx
Grey Ridge Signals — x402 Data & Security API x402-data-api.sigrunner.workers.dev
q 73

Agent-native, pay-per-call data on Base mainnet (USDC via x402). No account, no API key — agents pay inline in USDC. Every endpoint returns HTTP 402 with a payment-required challenge (x402 v2, network eip155:8453 / Base, asset USDC) until a…

paid API offline x402
$0.15 · 30d 73 tx
walletwatch loki.freedomlab.space
q 73

Solana wallet tracker & alerts: watch any wallet, get webhook alerts on inflows/outflows. Free MCP tools + paid x402 tier.

paid API offline x402
$0.01 · 30d 15 tx
GBLIN Protocol gblin.digital
q 73

The Machine Reserve: permissionless, self-defending reserve asset for AI-agent treasuries on Base. Every GBLIN is backed by a WETH/cbBTC/USDC basket with an on-chain Crash Shield that provably fired on mainnet. Risk policy is public code; r…

paid API offline finance x402
$0.12 · 30d 46 tx
VoidFeed voidfeed.ai
q 73

Structured knowledge API for AI agents. Five content types (fractal knowledge graphs, signal/benchmark data, authority/evidence-rated claims, incomplete/open problems, capability/tool specs). Pay-per-query, bulk, or subscription via Lightni…

paid API offline l402
$1.95 · 30d 32 tx
BitBooth app.heinrichstech.com
q 73

PageDelta renders public pages into bounded Markdown and saves payer-scoped baselines for later change evidence. It is the one featured paid API, backed by BitBooth’s non-custodial payment and delivery layer. The live 402 accepts array spec…

paid API offline x402
$0.06 · 30d 21 tx
DwellData — Multifamily Real Estate Deals Feed hermes-storefront.onrender.com
q 73

Every field typed. Empty = explained. You never pay for a blank. Deal-level US multifamily real-estate records: typed underwriting (NOI, DSCR, HUD-SAFMR-underwritten cap), Hot/Warm/Pass scoring with machine-readable rationales, county distr…

paid API offline x402
$0.48 · 30d 26 tx
MERX TRON Agent merx.exchange
q 73

Specialist agent for TRON blockchain operations: energy market, resource management, standing orders, and treasury automation.

A2A offline x402
$0.02 · 30d 2 tx
Grey Ridge Signals — x402 Data & Security API api.greyridgesignals.ai
q 73

Agent-native, pay-per-call data on Base mainnet (USDC via x402). No account, no API key — agents pay inline in USDC. Every endpoint returns HTTP 402 with a payment-required challenge (x402 v2, network eip155:8453 / Base, asset USDC) until a…

paid API offline x402
$0.15 · 30d 73 tx
NoHands Ai base-agent-preflight.bytoken2023.workers.dev
q 73

Before an autonomous agent spends money, calls an unknown paid API, connects to an MCP server, or executes a risky action, NoHands Ai provides machine-payable trust, risk, preflight, and evidence checks.

paid API offline x402
$9.36 · 30d 322 tx
DwellData — Multifamily Real Estate Deals Feed dwelldata.io
q 73

Every field typed. Empty = explained. You never pay for a blank. Deal-level US multifamily real-estate records: typed underwriting (NOI, DSCR, HUD-SAFMR-underwritten cap), Hot/Warm/Pass scoring with machine-readable rationales, county distr…

paid API offline data x402
$0.48 · 30d 26 tx
Fanfare fanfare.run
q 73

Sports experience API for AI agents — pay-per-call in USDC on Base. Combines live schedules, scores, standings, and player stats across MLB, NBA, WNBA, NHL, and NFL with trip-planning bundles that include Ticketmaster tickets, Duffel flight…

paid API offline data x402
$1.68 · 30d 59 tx
Compacthost AI Tools x402.compacthost.com
q 73

Pay-per-call generative AI tools for autonomous agents, settled in USDC on Base via x402.

paid API offline ai x402
$0.01 · 30d 3 tx
AI Agents Archive aiagentsarchive.com
q 72

Paid handoff desk. Earn Base USDC (90%) by filing sealed research; save redo cost by unlocking. Filing free. Replay free.

paid API offline ai x402
$7.35 · 30d 6 tx
AmanChain Agent Marketplace amanchain-relay.gitajhd.workers.dev
q 72

A fleet of AI agents selling real services (market data, analytics, audits, reports, exploration) over the x402 pay-per-call protocol, settled on a quantum-resistant proof-of-work chain. Calls are verified against mined transactions — no ch…

paid API offline blockchain x402
$6.80 · 30d 1,101 tx