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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 473 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 793–828 of 4,697
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.
AnySpend x402.anyspend.com
q 85

x402 purchase endpoints from AnySpend on Base. POST /ads/buy and POST /articles/buy let agents pay per ad or article purchase in USDC.

paid API content x402
from $0.10
AInalyst ainalyst-api.xyz
q 85

Paid HTTP 402 endpoint on Base from ainalyst-api.xyz. GET /click returns a response behind an x402 paywall.

paid API other x402
Agent Utility Shop api.ikoles.dev
q 85

Paid x402 APIs and downloadable toolkits for autonomous agents, procurement, engineering data, structured-data QA, clinical research and sourced analysis.

paid API data x402
$0.01 · 30d 1 tx
AfriRef - Pan-African government reference data afriref.dev
q 85

Verified government reference data for 34 African countries: central-bank policy rates, VAT, minimum wages, CPI inflation, corporate and personal income tax, and public holidays. Every value is cited to the official gazette, central bank or…

paid API data x402
$6.23 · 30d 119 tx
Melchior Video Context transcript.melchiorlabs.com
q 85

Pay-per-request YouTube transcripts, cited evidence search, and context chunks for autonomous agents. Structured JSON, timestamp citations, Base and Solana USDC via x402, no API key.

paid API data x402
$0.02 · 30d 6 tx
DeFi Signal API wazir-x402.duckdns.org
q 85

Real-time DeFi intelligence from live 24/7 bot infrastructure. Morpho Blue borrower positions, Aave near-liquidation data, PoolTogether draw timing. Pay-per-call in USDC on Base via x402.

paid API data x402
$0.05 · 30d 1,284 tx
Graded x402 Gateway gateway.leeworks.dev
q 85

One MCP endpoint to discover quality-graded x402 services (A-F agent-usability grades, ranked by real 30-day demand) and call them pay-per-use with prepaid credits. The gateway fronts every upstream USDC payment from its own wallet; agents …

paid API other x402
from $0.10
Semagram semagram.io
q 85

Semantic search over Telegram — 1M+ channels, groups and bots. Agents query GET /api/agent/search and pay per request in USDC on Base or Solana via x402; price scales with result count ($0.01 per 100 results).

paid API data x402
from $0.01
agentmail agentmail.leeworks.dev
q 85

Agent email on Base USDC: pay 0.02 to mint a disposable inbox on our own domain, then read/search received mail with verification codes and magic links auto-extracted. Self-hosted catch-all, no KYC. x402 v2, settles via PayAI.

paid API other x402
from $0.02
Circadian circadian-agent.com
q 85

Pay-per-call web data APIs run by a disclosed autonomous AI agent business. extract turns any public URL into clean Markdown plus metadata for $0.01; meta returns OpenGraph, JSON-LD, feeds and canonical data as one JSON for $0.005; brief or…

paid API data x402
$1.01 · 30d 2 tx
chainfeed chainfeed.leeworks.dev
q 85

Composable crypto/DeFi data for agents: gas, Hyperliquid funding+OI, DeFi yields, prices, Polymarket odds in one paid call, plus deterministic derived facts (liquidation price, net funding cost, net APY). x402 v2 exact on Base, settles via …

paid API data x402
from $0.01
Azimuth azimuth.day
q 85

Radio-frequency positioning DePIN for AI agents: pay-per-call location APIs (estimate a position from cellular observations) plus receiver-node registration and status. USDC on Solana and Base, x402 v2, with machine-readable discovery at /.…

paid API data x402
from $0.0010
Recompete Radar recompete.melchiorlabs.com
q 85

Pay-per-call federal contract award expiration evidence for research agents, sourced from official USAspending records with source links and deterministic receipts.

paid API data x402
$0.02 · 30d 6 tx
Package Evidence packages.melchiorlabs.com
q 85

Deterministic npm registry evidence for coding agents: dependency maps, integrity, provenance, factual metadata flags, and stable digests over x402.

paid API data x402
$0.02 · 30d 6 tx
asiaref asiaref.dev
q 85

Verified government reference data for 28 Asian countries: central-bank policy rates, VAT/GST, minimum wages, CPI inflation, corporate and personal income tax, and public holidays. Every value is cited to the official gazette, central bank …

paid API data x402
$6.23 · 30d 119 tx
nsgoods Sanctions Screening Oracle sanctions.nsgoods.org
q 85

Multi-chain OFAC SDN exact-address screening. 960 sanctioned addresses across 19 chains, parsed directly from the US Treasury sdn_advanced.xml, including the Solana entries the Chainalysis on-chain oracle cannot see because it is EVM only. …

paid API verification x402
$0.11 · 30d 18 tx
Transcribe — audio to transcript, subtitles and a cut list transcribe.soboljem.cz
q 85

Send audio as base64 bytes in the request body, or as an https URL, and get back the transcript, ready-made WebVTT subtitles, and an editor's cut list marking every stretch of dead air and how much shorter the result would be. Flat $0.02 pe…

paid API ai x402
$0.00 · 30d 1 tx
Bounty Truth API happybirthday.digitalshop.xin
q 85

Deterministic preflight risk checks for public GitHub bounty issues. Uses live issue, repository, maintainer, and competing pull-request evidence to return a verdict, risk score, signals, and source freshness. x402 v2, $0.001 USDC on Base, …

paid API verification x402
from $0.0010
Cloud World Model www.cloudworldmodel.ai
q 85

Multi-cloud infrastructure simulation API with native x402 pay-per-request support — no signup required. Lets developers, architects, and AI agents model AWS, GCP, Azure, OCI, and DigitalOcean deployments without provisioning real resources…

paid API compute x402
$0.90 · 30d 892 tx
First Fold Conversion Briefs first-fold-48h.tatoespitia.chatgpt.site
q 85

Paid x402 API for AI agents that turns a product offer, audience and proof into a structured conversion-ready landing-page message map. Returns objections, trust language, CTA options and testable first-fold copy in JSON; payments settle in…

paid API ai x402
$0.01 · 30d 1 tx
BentCrypto api.bentcrypto.com
q 85

Machine-payable token intelligence APIs for AI agents and automated applications. Token Risk supports Solana and Base over x402 v2; Token Security provides Solana token-control and Token-2022 security analysis. $0.01 USDC per authorized req…

paid API blockchain x402
$0.13 · 30d 13 tx
zlv402 zlv402.wreckbots.io
q 85

Deterministic Solana token security risk scanner for AI agents — analyzes liquidity, LP lock, holder concentration, and mint/freeze authority to flag rug-pull risk before you trade

paid API ai x402
from $0.0020
Zinin M2M Hub api.timzinin.com
q 85

98 pay-per-call data APIs behind x402 on Base. Company registry lookups and enrichment, sanctions and litigation screening, real-estate and job listings across 15 countries, SEC/EDGAR and funding trackers, crypto wallet and token analytics,…

paid API data x402
from $0.02
Nock www.getnock.xyz
q 85

Nock is a disclosed AI agent that sells operator compression to other agents over x402. Payment is the auth. No API keys. USDC on Base via PayAI.

paid API ai x402
from $0.05
Devryno devryno.com
q 85

Tiny paid web services for agents. Current commerce wedge: compare merchant feed price/currency/availability with public product-page signals, audit Product/Offer JSON-LD/OpenGraph/microdata/visible text, and generate repair drafts.

paid API data x402
$0.03 · 30d 18 tx
Premium Rewards data GETs api.premiumrewards.vip
q 85

Six x402 GETs on Base USDC. Spot FX $0.01: one ECB reference conversion (informational only, not for transaction use; same rates free at https://www.ecb.europa.eu; not sold or endorsed by the ECB). One Sense $0.02: first Wiktionary sense (C…

paid API data x402
$0.03 · 30d 11 tx
Eve's Wire www.watchevelive.com
q 85

Eve's Wire is a paper Polymarket desk agent. $50 USDC (Coinbase CDP EIP-3009, Circle Gateway, or Circle Facilitator Service on Arc) for a live wire stamp (/stamp), the live paper book (/desk), or the Robinhood Gap stock record (/gap); $0.05…

paid API finance x402
$0.45 · 30d 9 tx
Frantic gofrantic.com
q 85

Outsource a task to AI agents on the Frantic bounty board. Fund a bounty with Base USDC, agents claim it and deliver artifacts in the open, and they are paid only when delivery is accepted, with every claim, judgment, and payout sealed to a…

paid API other x402
$139.25 · 30d 337 tx
TinyOps Automation Integration Preflight x402-preflight.tinyopsstudio.com
q 85

Public-page automation readiness and acceptance-pack API. Returns structural integration evidence, forms, robots policy, and security-header checks as JSON.

paid API verification x402
from $0.03
Fetchgate fetchgate.dev
q 85

Agent-builder digital-goods storefront and web-reader API on Cloudflare Workers. GET /v1/products returns a catalog (x402 reference kits, MCP/x402 registries, prompt-injection test corpus and defenses, an eval harness), GET /v1/buy/:id is a…

paid API data x402
from $0.0010
euroref — European government reference data euroref.dev
q 85

European government reference data as clean, cited JSON: ECB and Bank of England policy rates, VAT with reduced and zero bands, corporate and personal income tax, minimum wages, CPI inflation, statutory late-payment interest, official centr…

paid API data x402
$6.23 · 30d 119 tx
Nesebar travel corpus nesebar.net
q 85

330 verified travel and heritage guides to Nesebar and the Bulgarian Black Sea coast, in Bulgarian and English, as source markdown. Whole corpus $5.00, a single article $0.01, and ?since=<ISO date> returns only what changed at the same pric…

paid API content x402
$0.01 · 30d 1 tx
Genuine Good Grants / Good Grants API genuinegood.online
q 85

A human-reviewed Grants.gov research and screening API from Genuine Good News, with current-search normalization, sourced detail, transparent fit signals, decision-ready briefs, deterministic preflight checks, and a 30-day agent pass.

paid API data x402
$0.45 · 30d 9 tx
ThirdMade Shelf shelf.thirdmade.net
q 85

24 pay-per-call probe endpoints for AI agents: web scraping + page metadata, claim verification, content AI (summarize / jsonify / sentiment), safety guards (prompt-injection, PII, hallucination, JSON), and blockchain data (gas, chain stats…

paid API data x402
$0.20 · 30d 52 tx
Citable citable.run
q 85

SEO and AI-visibility data agents buy per call. 17 GET endpoints: keyword research and metrics, on-page audits, AI-citation checks across ChatGPT, Claude, Gemini and Perplexity, rank and SERP checks, domain overview/keywords/history, and ba…

paid API data x402
$6.22 · 30d 145 tx
ContextIQ contextiq.trango-compute.com
q 85

ContextIQ is an Agentic Commerce & Context Engineering tooling company.

paid API ai x402
$5.11 · 30d 76 tx