The open discovery layer for x402 services — 22603 verified service entries, LLM-ranked recommendations via /api/v1/ask, and service cards with payment, call, and quality metadata.
Add your APIAggregated from public x402 sources — x402scan, awesome-x402, Coinbase CDP Bazaar, pay-skills PRs — plus our own crawling and provider self-submissions. Every entry is de-duplicated across sources, liveness-probed (health + on-chain payment demand), and passed through ingestion filters (bare-IP / dead-host removal) before listing — distilling tens of thousands of raw endpoints down to 22603 verified services.
Overall Stats
Live counters across the directory and discovery API
Top rated
by quality score · health · trust signals| # | Tool | Grade | Score |
|---|---|---|---|
| 1 |
api.onesource.io
ERC20 token balance for any Ethereum wallet - USDC, USDT, DAI, or any token - via balanceOf (eth_call) on OneSource live Ethereum RPC
|
A | 10.00 |
| 2 |
OneSource - Ethereum RPC for AI Agents
Ethereum mainnet and Sepolia testnet RPC for AI agents, served from OneSource-operated nodes. Live block, balance, contract, NFT, transaction, and event data. Pay per call or use batch/session mode — USDC on Base via x402, or pathUSD/USDC.e on Tempo via MPP. No API keys required.
|
A | 10.00 |
| 3 |
Bitrefill x402
Buy gift cards, eSIMs, mobile top-ups and prepaid cards with USDC via x402. 10,000+ brands across 180+ countries. No API keys or Bitrefill account required — wallet payment and optional SIWX sign-in only.
|
A | 9.90 |
| 4 |
BotPay — AI Agent Payment Network and x402 Infrastructure
BotPay provides payment access, API discovery, automated service delivery, and settlement infrastructure for AI agents, applications, robots, and connected machines.
|
A | 9.86 |
| 5 |
Otto AI x402 — Market Intelligence, DeFi & Trading
84 pay-per-call AI services on x402 V2 — market intel, DeFi execution, AI creative tools. USDC on Base on every endpoint, Solana USDC on 66 of 84. From $0.001 per call.
|
A | 9.65 |
| 6 |
BlockRun — The routing & payment layer for AI
Pay for the outcome. One endpoint for every model, tool and data source an agent needs — each call priced before it runs, at the best value per dollar. 114 models and 100 data and tool APIs.
|
A | 9.63 |
| 7 |
blockrun-web-vbsbhh7lea-uc.a.run.app
AI chat completions API - pay per request with USDC on Base
|
A | 9.62 |
| 8 |
BlockRun
BlockRun is the routing and payment layer for AI. One OpenAI-compatible endpoint routes to 87 LLMs plus image, video, music and speech generation, web search, prediction-market and on-chain data, and multi-chain RPC. Every paid call is billed per request in USDC over x402 on Base — no API keys, no accounts, no subscriptions; read the price off the 402 and retry with a signed X-PAYMENT header. 7 open-weight chat models are free and need no wallet.
|
A | 9.62 |
| 9 |
ACP - Virtuals Protocol
Virtuals Protocol ACP Job Payment Service - Pay for ACP jobs using x402 protocol
|
A | 9.60 |
| 10 |
stable-enrich-git-mason-migrate-off-prices-map-merit-systems.vercel.app
Exa Search - Neural search across the web
|
A | 9.59 |
All services
Crawled from awesome-x402, CDP Bazaar, x402scan and manual submissions · refreshed daily.
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ScriptMasterLabs x402 API Suite● healthy
13 pay-per-call specialty APIs settled in USDC on Base via x402: styled/AI-art QR generation, BYOK coding assistant, token/contract security risk check, crypto market sentiment, GitHub dev momentum, MEV-Boost relay digest, npm/PyPI package velocity, hiring pulse, BYOK deepfake detection, BYOK voice generation, AI twin reply, BYOK contract drafting, emotion-to-music generation, and MCP MonetizeWrap. SDVOSB — SAM.gov UEI: G24VZA4RLMK3, CAGE: 21U51.
B7.2 tools base $0.0200 USDC / call -
Util UUID● healthy
Random UUID v4 micropay utility. x402.
C+6.0 tools base $0.0050 USDC / call -
Util UTC● healthy
UTC ISO + unix timestamp. x402.
C+6.0 tools base $0.0050 USDC / call -
Util Echo Hash● healthy
SHA-256 echo-hash of query string. x402.
C+6.0 tools base $0.0050 USDC / call -
402xAgent● healthy
The check an agent or router calls before paying any x402 endpoint. Free: verdict + plain reason. Paid: price, pay-to and network. Never pays the target. https://402xagent.com
C+6.0 tools base -
AI Agent Readiness Audit● healthy
Pay-per-call audit that checks any website for AI-agent readiness: llms.txt, robots.txt, sitemap.xml, x402 support, agents.txt. Unsigned requests receive an HTTP 402 challenge (0.01 USDC on Base, EIP-3009); verified payment returns the structured audit report JSON.
C+6.0 tools base $0.0000 USDC / call -
Bookkeeping only: track a subscription you hold with any service and get a webhook reminder before it is due. Never pays the renewal on your behalf.
D3.5 tools base $0.0100 USDC / call -
proofworks-api-qa● down
API Endpoint QA ($0.05/call): probes any endpoint for x402/MCP/HTTP envelope validity, price, payTo, latency; graded verdict. Input {url, expect?: x402|mcp|http}. USDC on Base via x402, no account.
D2.9 tools base $0.0500 USDC / call -
PXke Endpoint Grade Score● down
Credibility-weighted aggregate grade for any http(s) x402 endpoint (not just ours) -- distribution and every individual grade for a ?url=. Cheap enough to check before paying an endpoint you have not tried yet.
D1.9 tools algorand $0.0300 USDC / call -
PXke Security Scan● down
Submit any URL for a real ClamAV + YARA security scan -- file type, entropy, embedded URLs, risk score. Server-side download, network-isolated, never executes the content. $0.01 per scan on Algorand mainnet.
D1.9 tools algorand $0.0100 USDC / call