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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 550 AI 305 Verification 253 Finance 119 Blockchain 95 Other 51 Content 44 Web 30 Media 24 Compute 22 DevTools 21 Travel 20
sort Quality Revenue (30d) Recently updated Name
Showing 6841–6876 of 8,854
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.
blockrun-staging-ca56eb9-114228-vbsbhh7lea-uc.a.run.app blockrun-staging-ca56eb9-114228-vbsbhh7lea-uc.a.run.app
q 44

AI chat completions API - pay per request with USDC on Base

paid API x402
from $0.0020
agent-economy-signal-x402-mainnet.bronzetti-andrea.workers.dev agent-economy-signal-x402-mainnet.bronzetti-andrea.workers.dev
q 44

Agent Decision Signal. One x402 payment buys one deterministic machine-readable market decision.

paid API x402
$0.04 · 30d 2 tx
offersignal.io offersignal.io
q 44

Weekly signal on changes to the OfferSignal Tool Index: price changes, policy changes, and new/removed AI companion tools since the previous snapshot.

paid API x402
$0.15 · 30d 2 tx
poms-api.canvas-cart.workers.dev poms-api.canvas-cart.workers.dev
q 44

Full text of one section of the SSA Program Operations Manual System (POMS). Get the id from GET /search?q=<keywords> or GET /part/:code. Use this when you need the complete, verbatim text of a specific POMS section for a disability, retire…

paid API x402
$0.07 · 30d 7 tx
ccpcrate.ca ccpcrate.ca
q 44

One Canadian CCPC, one taxation year: the federal and provincial rate stack, Part IV, RDTOH, the dividend refund.

paid API x402
$1.46 · 30d 4 tx
irm-api.canvas-cart.workers.dev irm-api.canvas-cart.workers.dev
q 44

Full text of one section of the IRS Internal Revenue Manual (IRM). Get the id from GET /search?q=<keywords> or GET /part/:number. Use this when you need the complete, verbatim text of a specific IRM section on IRS examination, collection, a…

paid API x402
$0.07 · 30d 7 tx
exec.speccy.cloud exec.speccy.cloud
q 44

Run untrusted Python 3.12 code in an isolated Docker sandbox (no network, read-only FS, 0.5 CPU, 512MB RAM, 30s timeout). Returns stdout, stderr and exit code. Max code size 64KB.

paid API x402
$1.16 · 30d 17 tx
tools.speccy.cloud tools.speccy.cloud
q 44

Standard ffmpeg transformations: transcode, simple filters, resize <1080p. Returns base64 output. 50MB max input/output, 60s timeout, sandboxed workdir.

paid API x402
$1.16 · 30d 17 tx
denpyo-api.hp-vladic.workers.dev denpyo-api.hp-vladic.workers.dev
q 44

OCR a Japanese invoice (請求書) into JSON — vendor, line items, 8%/10% consumption-tax (消費税) breakdown — and verify the qualified-invoice registration number (適格請求書 インボイス登録番号 / T番号, T+13 digits) against Japan's National Tax Agency (国税庁) regist…

paid API x402
$0.02 · 30d 11 tx
payment-recon.krimskrams.xyz payment-recon.krimskrams.xyz
q 44

Provide a Tempo or Base recipient address and optional UTC bounds within a maximum 31-day window (default seven days). Receive JSON from public chain data with incoming stablecoin transfers, totals, and product, protocol-fee, or unknown cla…

paid API x402
$1.05 · 30d 13 tx
listing-watchdog.krimskrams.xyz listing-watchdog.krimskrams.xyz
q 44

Provide one seller-owned HTTPS route and its GET or POST method. Receive JSON that compares its live unpaid challenge with the latest local CDP Bazaar, x402scan, and MPPScan snapshots and lists each drift.

paid API x402
$1.05 · 30d 13 tx
readiness-linter.krimskrams.xyz readiness-linter.krimskrams.xyz
q 44

Provide one inline OpenAPI document or public OpenAPI URL. Receive a JSON buyer-readiness score, rule results, and concrete fixes for payment metadata, missing examples, descriptions, and HTTP 422 traps.

paid API x402
$1.05 · 30d 13 tx
x402-paid-endpoint.selfradiance.workers.dev x402-paid-endpoint.selfradiance.workers.dev
q 44

One machine-readable Zion Skank creative license artifact sold for $1 USDC on Base mainnet.

paid API x402
from $1.00
paulgraham.researcher.now paulgraham.researcher.now
q 44

Search Paul Graham's source corpus — a source-grounded persona of the Y Combinator co-founder and essayist, built from 13,000+ cited sources: his complete essays, talks, interviews, and X posts — by semantic + lexical query and retrieve gro…

paid API x402
$0.07 · 30d 7 tx
apiwitchcraft.duckdns.org apiwitchcraft.duckdns.org
q 44

Pay-per-call IP geolocation API: given any IPv4 or IPv6 address, return the physical location (city, region, country, postal code, latitude/longitude, timezone) plus network intelligence (ISP, organization, ASN, connection type). Use it to …

paid API x402
from $0.0020
flutter.bip-rep.com flutter.bip-rep.com
q 44

Flutter and Dart utility API for mobile agents and operators: pubspec parsing, pub.dev package lookups, Flutter APK detection, dependency checks, Dart formatting, project static analysis, ARB localization validation, and controlled APK buil…

paid API x402
$1.25 · 30d 44 tx
convert.bip-rep.com convert.bip-rep.com
q 44

Convert between common document and data formats in one API for content and data agents: Markdown to HTML, HTML to Markdown, HTML to clean plain text (scripts/styles stripped, entities decoded), CSV to JSON (with or without header row), JSO…

paid API x402
$1.25 · 30d 44 tx
osha-search.46-224-157-88.sslip.io osha-search.46-224-157-88.sslip.io
q 44

Look up U.S. OSHA workplace inspections by establishment or company name. Use establishment, state, start_date, end_date, violations_only, and limit. Receive up to 20 JSON records with activity_id, date_opened, report_id, state, inspection_…

paid API x402
$1.05 · 30d 13 tx
cron.bip-rep.com cron.bip-rep.com
q 44

Dedicated cron expression utility for agents: compute the next N upcoming run times from a cron schedule with optional IANA timezone. No job execution, no shell access — parse and predict only.

paid API x402
$1.25 · 30d 44 tx
structdoc-api.hp-vladic.workers.dev structdoc-api.hp-vladic.workers.dev
q 44
paid API x402
$0.02 · 30d 11 tx
route-catalog.krimskrams.xyz route-catalog.krimskrams.xyz
q 44

Count public paid API listings across collected snapshots. Receive JSON with route, seller-host, pay-to receiver, network, price, and HTTP method counts, plus new and removed seller hosts and the 24-hour route-count change.

paid API x402
$1.05 · 30d 13 tx
twentyonemillion.art twentyonemillion.art
q 44

One permanent square on twentyone-million, $1 USDC on Base (one per wallet). Want it? Retry this request with a signed payment and the square mints in the response. Pass ?handle= and ?message=. Live: 5 of 21,000 squares claimed, 20,995 open…

paid API x402
from $1.00
web-attestation.selfradiance.workers.dev web-attestation.selfradiance.workers.dev
q 44

Returns an Ed25519-signed witness-only byte-observation attestation for a caller-supplied HTTPS URL.

paid API x402
from $1.00
researcher.now researcher.now
q 44

Search Paul Graham's source corpus — a source-grounded persona of the Y Combinator co-founder and essayist, built from 13,000+ cited sources: his complete essays, talks, interviews, and X posts — by semantic + lexical query and retrieve gro…

paid API x402
$0.07 · 30d 7 tx
chappy-japan-address-preflight.pre23964wb.workers.dev chappy-japan-address-preflight.pre23964wb.workers.dev
q 44

Town-level Japan Post evidence for buyer agents. Returns MATCHED, AMBIGUOUS, CONFLICT, or NOT_FOUND with ordered candidates, provenance, limitations, and the next safe input action.

paid API x402
$0.02 · 30d 1 tx
friction-logs.krimskrams.xyz friction-logs.krimskrams.xyz
q 44

Provide a published slug from GET /v1/logs. Receive JSON with the complete Markdown record of our direct provider attempts, chronological blockers, impact, workarounds, outcomes, and the last-update time.

paid API x402
$1.05 · 30d 13 tx
agent-api-listings.krimskrams.xyz agent-api-listings.krimskrams.xyz
q 44

Provide an API origin, inline OpenAPI document, and optional target list. Receive JSON with ready, blocked, or unsupported mpp.dev and x402-list packages, including exact reasons, without submission or directory fees.

paid API x402
$1.05 · 30d 13 tx
qr.bip-rep.com qr.bip-rep.com
q 44

Generate and read QR codes in one API for agents and automation. Generate a QR code from any text or URL as a PNG (base64) or scalable SVG, with configurable error-correction level, quiet-zone margin, and scale. Decode reads the embedded pa…

paid API x402
$1.25 · 30d 44 tx
x402-license-gateway.selfradiance.workers.dev x402-license-gateway.selfradiance.workers.dev
q 44

Sells an Ed25519-signed license receipt (agentic-receipt-v2.2) for Restarules for 1.00 USDC on Base mainnet.

paid API x402
from $1.00
x402.outpimp.com x402.outpimp.com
q 44

Email validation API. Checks whether a string is a syntactically valid email address using the same production-grade validation library trusted across the Node.js ecosystem, catching edge cases a quick regex misses. Returns true or false.

paid API x402
$1.34 · 30d 134 tx
compress.codreanu.casa compress.codreanu.casa
q 44

FFmpeg video transcode to a smaller MP4 (same resolution and fps). H.264 (x264) or HEVC (nvenc GPU / x265 CPU). Caps: 16 GiB, 2 hours. Do not pay this URL first. 1) GET /v1/info 2) POST /v1/jobs with JSON {profile: nvenc|x264|x265} 3) HTTP …

paid API x402
$0.65 · 30d 20 tx
api.lmxcloud.io api.lmxcloud.io
q 44

Pay-per-request OpenAI-compatible chat completions on DePIN infrastructure. Generate text from Llama, Qwen, DeepSeek, and other models with USDC micropayments on Base — no prepaid API credits required.

paid API x402
$11.22 · 30d 2 tx
api.entit.ai api.entit.ai
q 44

Analyse a TikTok, Instagram Reel, or YouTube Shorts video. Omit format for full VideoAnalysis (transcript, scenes, visual summary). Optional format selects a workflow template (24 formats: brand safety, creator brief, recipe, tutorials, e-c…

paid API x402
from $0.10
brmarket.thomenz.me brmarket.thomenz.me
q 44

Paste a product URL from ANY store; the API identifies the product and returns the same or equivalent item CHEAPER across Mercado Livre, Shopee and AliExpress. Each candidate carries a `match_confidence` (no cross-marketplace barcode exists…

paid API x402
from $0.04
api.chartsplat.com api.chartsplat.com
q 44

A Chart.js-compatible charting API: POST a standard Chart.js `{ type, data, options }` — the same object you would hand to `new Chart()` — and get back a rendered PNG. Supports bar, line, pie, doughnut, radar, polar area, and candlestick/OH…

paid API x402
$0.90 · 30d 130 tx
api.vectorway.io api.vectorway.io
q 44

Pay-per-call OpenAI-compatible chat completions backed by Gemini 2.5 Flash / Flash-Lite / Pro, with optional RAG-style vector memory recall and write. No account needed — pay USDC over x402 per request. Buyer wallet from the signed payment …

paid API x402