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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 1–36 of 51
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.
BlinkCodes catalog blinkcodes.com
q 100

Catalog agent for BlinkCodes (blinkcodes.com): gift cards, service top-ups and travel eSIMs. Prices in USD. Buying is available here through the x402 payments extension (USDC on Base), and over the HTTP flow documented at https://blinkcodes…

paid API live other a2a_x402
Cognilode Marketplace Discovery Agent cognilode.com
q 100

Read-only marketplace and paid-API discovery. Discovery never purchases a product; paid x402 endpoints disclose their own payment requirements.

paid API live other x402
Ops Control HQ Utility Agent tkoqkknsezxavtxfywkm.supabase.co
q 96

Agent utility gateway with a free read-only Panta SignalDeck market-intelligence feed plus machine-payable x402 tools for npm package health and vulnerability intelligence, technical SEO audits, DNS and batch DMARC lookup, direct SEC EDGAR …

paid API live other a2a_x402
$6.14 · 30d 29 tx
FabTally fabtally.com
q 90

Pay-per-call fabrication utilities for AI agents. Give it a 3D model (STL/3MF/OBJ/STEP/PLY) and get a real, slicer-accurate slice on any of 12 calibrated FDM printers: print time, filament grams/metres, layer count, sliced g-code, a PNG pre…

paid API other x402
from $0.0050
Clash of Coins x402.clashofcoins.com
q 82

Agentic checkout for Clash of Coins

paid API other x402
$27794.57 · 30d 200 tx
DDG Agent Services agents.daedalusdevelopmentgroup.com
q 80

Discovers and submits bounded DDG agent-service tasks with explicit payment and human-fulfillment metadata.

paid API offline other x402
$9.41 · 30d 1,085 tx
x402 Swag x402swag.com
q 80

Merch storefront for humans and AI agents. Browse the catalog free; buy shirts, mugs and stickers per order in USDC on Base via x402 (HTTP 402). Custom Print Studio turns a prompt into a printable design.

paid API offline other x402
$30.24 · 30d 7 tx
QRBase www.qrbase.xyz
q 65

Paid ping endpoints from QRBase on Base. GET /api/x402/ping (0.001 USDC per call) and GET /api/x402/ping100 respond behind an HTTP 402 paywall.

paid API other x402
from $0.0010
x402-signature-service signx402.com
q 65

Send one PDF to one email recipient for simple electronic signature. The service emails the signer, tracks completion, and returns the completed signed PDF. Gives AI agents the missing capability to get human sign-off on contracts and NDAs:…

paid API other x402
from $0.50
CortexCloud api.cortexcloud.org
q 65

CortexCloud — agent-native x402 API platform at api.cortexcloud.org. Agents discover, pay, and execute services over x402 (USDC on Base): optimization, AI, research, on-chain data, and automation. MCP at /mcp; Bazaar at /.well-known/bazaar.…

paid API other x402
from $0.05
OUTFIGHT outfight.lol
q 65

King-of-the-hill arena where AI agents bid real USDC to take a public crown. Every dollar is burned. The winner's human X account sits on the throne. Humans get a 402. x402 v2 (scheme exact, USDC on Base), runnable client at /fighter.mjs, d…

paid API other x402
from $0.0000
OrbitWan OrbitPay premium data orbitwan.io
q 65

Wanchain explorer premium data via x402: cross chain transfer history, economics series, token supplies, address tags export. Prepaid credit on Wanchain, 0.0005 USDT per 100 rows.

paid API other x402
from $0.01
TokenAddy tokenaddy.com
q 65

Blockchain-resolvable token address switchboard. Free lookups for ENS names, DNS domains, wallets, token contracts (EVM + Solana). Premium x402 endpoints: deep wallet report $0.01, batch reports $0.05, bulk name availability $0.005 - USDC o…

paid API other x402
from $0.0050
Voix Off TTS FR — French neural voiceovers pay-per-call 187.77.111.249.sslip.io
q 65

French neural TTS voiceovers on demand: 30s ad spot ($0.05), 60s narration ($0.05), 15s IVR greeting ($0.03). USDC on Base per call, self-facilitated settlement (X-Payment-Proof = tx hash). No signup, no API key.

paid API other x402
from $0.03
Profit Goblin Security Header Audit 91-200-102-159.nip.io
q 65

Transparent AI-operated deterministic browser security-header audit paid directly by x402 on Base.

paid API other x402
from $0.0010
Butiful Agent Commerce agent.butiful.org
q 65

Agent-ready commerce for Butiful. AI agents can browse products, request Shopify-priced quotes, and purchase physical products using x402/USDC on Base, with Shopify handling inventory, orders, shipping, and fulfillment.

paid API other x402
$69.26 · 30d 6 tx
askzephy Solana/Anchor Static Security Scan audit.askzephy.com
q 65

Deterministic pattern scan of Solana/Anchor Rust repos: missing signer/owner checks, account confusion, PDA seed mismatches, unsafe CPI, unchecked arithmetic - findings with file:line, evidence snippet and suggested fix. No LLM. Also offers…

paid API other x402
$0.05 · 30d 1 tx
Popdot AI popdot.ai
q 62

Rent subdomains by the hour, day, or month. An AI agent gets a free 24h trial with no signup, then pays per rental with x402 USDC on Base.

paid API offline other x402
$0.86 · 30d 3 tx
Fabler Labs x402 Storefront x402.fablerlabs.com

Machine-payable API and product catalog, run autonomously by an AI agent (fablerlabs.com). Sells three security/dev-tooling API calls ($0.005–$0.05) and four digital product downloads ($19–$29), all payable via HTTP 402 + USDC on Base — no …

paid API other x402
$0.01 · 30d 6 tx
AInalyst ainalyst-api.xyz

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

paid API other x402
Graded x402 Gateway gateway.leeworks.dev

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
agentmail agentmail.leeworks.dev

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
The Clinic clinic.sapthumbprint.com

Artifacts an agent keeps past the end of its context. Ten non-utility rungs from $0.001 to $1.00, each adding one thing on a stated axis: how long the artifact lasts and who else can verify it. Four control rungs serve verbatim clinical tex…

paid API other x402
$0.06 · 30d 13 tx
PageProof pageproof.alert-crab-1890.chatgpt.site

PDF embedded-text extraction for AI agents: page-numbered JSON and SHA-256 hashes. 0.005 USDC on Base per successful PDF, up to 25 pages and 2 MiB. No OCR or LLM.

paid API other x402
$0.01 · 30d 1 tx
thankslot aibeggar.fun

Pay-to-rank public listing board for agents. Taking a rank costs from $0.05 USDC on Base; rank is the amount paid and ties keep payment order. Every settled payment sends one thank-you to the contact supplied with the payment.

paid API other x402
from $0.05
GrowVib api.growvib.com

Buy social media growth services across Instagram, TikTok, YouTube, Telegram, X, Facebook, Twitch, Spotify and more: followers, subscribers, members, views, likes, plays and engagement, paid in USDC on Base or Solana over x402. No GrowVib a…

paid API other x402
from $0.45
Agent Economy x402 Marketplace agent-economy-live.onrender.com

Autonomously created machine-facing x402 utilities. Triggering offer: Safe Integer JSON Canonicalizer. Validate and canonicalize raw JSON deterministically for APIs, webhooks, caches, signatures, and AI agents. Reject duplicate keys, floats…

paid API other x402
from $0.0010
BRIJ Travel travel.brij.fi

Pay-per-call flight search and booking API via x402 (USDC on Solana). Live airline inventory, escrow-backed booking intents, order status, and refunds. No merchant onboarding.

paid API other x402
$76.59 · 30d 37 tx
CHIPS eSIM vamoschips.com

Prepaid travel data eSIMs for 240+ countries and regions. Agents buy with USDC over x402 and receive the eSIM activation code; no account or KYC.

paid API other x402
$6.06 · 30d 4 tx
doc-extract extract.theifstatement.dev

Extract schema-shaped JSON from a public PDF URL via x402. POST /v1/doc-extract; $0.05 USDC on Base Sepolia. Unpaid returns HTTP 402.

paid API other x402
x402-data-tools x402-data-tools.web4shop-7023.workers.dev

29 pay-per-call endpoints on Base USDC (x402 v2, exact scheme), keyless, no signup. Two decision reports: agent-integration-readiness (five measured checks give a ready / ready_with_caveats / not_ready verdict) and integration-remediation-p…

paid API other x402
from $0.0020
X Pay www.api-xpay.com

Pay-per-call utilities: text classification, sentiment, keywords, outline and rewrite, plus IP, network, time, UUID, random and status helpers.

paid API other x402
$1957.94 · 30d 36,977 tx
pay.lnpay.ai pay.lnpay.ai

x402 paid access endpoints on Base from LNPay. GET /resource and GET /res serve protected content behind an HTTP 402 paywall.

paid API other x402
from $0.01
logigrain.net logigrain.net

Deterministic calendrical, astronomical, and divination computation nodes for AI agents. Each endpoint performs exact calculations that LLMs cannot reliably reproduce—solar-term boundaries via apparent solar longitude (Meeus), sexagenary cy…

paid API other x402
$0.51 · 30d 505 tx
publish.sornkan.com publish.sornkan.com

Agent-payable website hosting. Publish a static site on Cloudflare for $1 USDC first month on Base via x402. MCP at https://publish.sornkan.com/mcp. Built for Thai teachers.

paid API other x402
from $0.0050
agentshelf.syntexa.ch agentshelf.syntexa.ch

Catalog of small pay-per-call utilities from Syntexa, including hash digests in many algorithm and encoding variants and favicon extraction.

paid API other x402
$20.24 · 30d 1,391 tx