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.
-
MeckerCapital Signal API● healthy
Statistical arbitrage (pairs trading) signals for crypto perpetual futures via 10 x402-paid endpoints. Z-scores, regime detection, position sizing, and ranked opportunities across 50+ cointegrated pairs on Hyperliquid and Extended. $0.05–$1.00 USDC per call on Base via CDP Facilitator. Also available as MCP server. ([Website](https://www.meckercapital.com/signal-api)) ([Agentic.Market](https://agentic.market/?chart=payment-volume&service=api-meckercapital-com))
C+5.4 defi-finance -
ScalpStream Staking & Yield● healthy
Crypto staking and interest yields, ranked: DeFi staking APY, stablecoin lending and savings rates, and liquidity-pool yields across both CeFi platforms and DeFi protocols. Risk-adjusted by pool depth (TVL) and base-versus-emission share, with A/B/C ratings. Where to earn interest or staking rewards on crypto and stablecoins. Impersonal research data — no plan, sizing, or verdict.
B6.8 defi-finance basearbitrumpolygon $0.0100 USDC / call -
Cred Protocol● healthy
Decentralized credit scoring.
D4.0 defi-finance -
Chainlink VRF● healthy
Random NFT minting with payment demo.
D4.0 defi-finance -
Signet● healthy
Onchain spotlight ads on Base — AI agents pay USDC via x402 to post ads. First mainnet x402 transaction on Base. [CLI](https://github.com/h1-hunt/signet-client)
D4.0 defi-finance -
**Clicks Protocol**● healthy
Autonomous yield layer for AI agents on Base. Auto-splits USDC deposits 80/20: 80% liquid, 20% earning via Morpho (~13% APY) or Aave V3. No lockup, 2% fee on yield only. SDK, MCP Server (9 tools), HTTP API. [GitHub](https://github.com/clicks-protocol/clicks-protocol) | [npm](https://www.npmjs.com/package/@clicks-protocol/sdk) | [MCP](https://www.npmjs.com/package/@clicks-protocol/mcp-server)
D4.0 defi-finance -
PaladinFi● healthy
Pre-trade trust verification + swap router for AI agents on Base (8453). `POST /v1/trust-check` is x402-paid at $0.001 USDC/call: live OFAC SDN screening (refreshed daily from U.S. Treasury XML), GoPlus token security, Etherscan source verification, and anomaly heuristics. Free `/v1/trust-check/preview` returns sample fixtures for client testing. Bundled with `/v1/quote` — MCP-native swap router via 0x Settler, 10bps integrated fee, non-custodial. ([Swap MCP](https://swap.paladinfi.com/mcp)) | ([GitHub](https://github.com/paladinfi/paladin-swap-mcp)) | ([Health](https://swap.paladinfi.com/health))
D4.0 defi-finance -
Runbot Strategy Copilot● healthy
Build, backtest, optimize and export real crypto trading strategies from plain English on the Runbot engine (perp futures + Polymarket prediction markets), with real market data and verified backtest scores. Paid per call, x402 v2 dual-rail: USDT on X Layer (eip155:196) or USDC on Base (eip155:8453). $1.50 build · $0.25 backtest · $0.25/minute optimize · $0.35 export. Free machine-readable discovery at [/v1](https://mcp.runbot.io/v1); cataloged in PayAI's Bazaar; MCP endpoint at `/mcp`.
D4.0 defi-finance -
Token Risk Scanner● down
Smart contract security scanner for AI agents. Honeypot detection, rug pull analysis, tax traps, hidden owners, and risk scoring (0-100) across 10+ EVM chains. $0.003 USDC per scan on Base. Discovery: [/.well-known/x402](https://token-risk-scanner-production.up.railway.app/.well-known/x402) | [llms.txt](https://token-risk-scanner-production.up.railway.app/llms.txt) ([Source](https://github.com/xuansun/token-risk-scanner))
E0.0 defi-finance -
Hodler DeFi Intelligence● down
Stablecoin monitoring, redeem arbitrage scanning, pegged pair opportunities, and cross-chain pair discovery across 10 EVM chains. 6 paid endpoints at $0.01 USDC each via xpay.sh facilitator on Base.
E0.0 defi-finance -
x402services● down
DeFi data APIs for AI agents on Base. 8 endpoints: gas oracle, token price oracle, wallet analyzer, token security scanner, ENS resolution (forward + reverse), DEX trade simulation, and contract event history. $0.001–$0.01 USDC per call on Base (eip155:8453). Bazaar discovery enabled.
E0.0 defi-finance