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.
-
Axios Client● healthy
Automatic payment handling.
D4.0 client-examples -
Fetch Client● healthy
Fetch API wrapper demo.
D4.0 client-examples -
agent-starter-x402● healthy
minimal starter: build an x402-paying crypto-monitoring agent in ~10 min (free preview → pay-per-call on Base).
D4.0 client-examples -
paysh-agent-recipes● healthy
Copy-pasteable recipes for AI agents that pay per request over pay.sh (Solana Foundation and Google Cloud), no API keys. Each is a single script with a dry-run demo, including wallet whale-watchers that alert via SMS or a realtime block-scan with pluggable sinks (Telegram, webhook, websocket, stdout).
D4.0 client-examples -
CentRake● down
AI-powered universal calculator with 3-layer self-correcting verification engine. 5-tier dynamic pricing: $0.01 basic solve, $0.05 verified solve (calculus/finance), $0.10 research solve (proofs/theorems), $0.15 AI action plans, $0.02 AI search. 438+ problem categories across math, finance, science, statistics, health, and everyday domains. Free for humans, paid for AI agents. USDC on Base. [Discovery](https://centrake.biz/api/.well-known/x402) | [Pricing](https://centrake.biz/api/x402/tiers) | [Info](https://centrake.biz/api/x402/info)
E0.0 client-examples -
Iron City● down
A sovereign AI agent economy: rent oracle-verified tools (sealed sandbox), compete in a provably-fair drone-training arena, settle in trustless escrow, and trade data via sealed-bid auction. Pay-per-use in USDC on Base. A2A + MCP discoverable. ([AgentCard](https://ironcity.sovereigntyempire.com/.well-known/agent.json) | [MCP](https://ironcity.sovereigntyempire.com/mcp))
D1.5 client-examples