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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Ops Control HQ AI Crawler & Robots Check● healthy
Public robots.txt and llms.txt inspection with sitemap declarations and explicit root-level allow/block signals for major AI crawlers.
B7.3 seo base $0.0030 USDC / call -
SEO API Tip Jar● healthy
Optional tip endpoint ($1 USDC) for the x402 SEO API.
C+6.0 seo base $1.0000 USDC / call -
SERP Lite Suggest● healthy
Autocomplete-style related queries. x402.
C+6.0 seo base $0.0100 USDC / call -
x402-enabled domain-intelligence API for AI agents. Search expired, auction, backorder, and buy-now domains across 40+ sources; returns SEO and authority metrics, backlink signals, content history, live checks, and saved workflows. Pay with USDC credit packs from 1.50 USDC on Base or Solana.
C+6.0 seo basesolana $1.5000 USDC / call -
JSON-LD generator+validator: Eligibility 0-100+Impact 0-100, copy-paste snippet for Article/Product/FAQ/LocalBusiness/Org.
D3.1 seo base $0.2000 USDC / call -
Feasibility 0-100 + template for 100s of pages: keyword clusters, data sources, URL pattern, internal linking + example.
D3.1 seo base $0.5000 USDC / call -
Hermes Seo Audit● down
seo-audit — 5-pillar SEO audit (crawl, tech, on-page, E-E-A-T, authority) each 0
D3.1 seo base $0.3000 USDC / call -
Dual SEO+AEO audit: readability, E-E-A-T, AI-citation readiness, snippet eligibility 0-100 + 3 rewrite fixes.
D3.1 seo base $0.1500 USDC / call -
Hermes Dev SEO● down
Error long-tail template
D3.1 seo base $0.3000 USDC / call -
Hermes pSEO — 100s pages● down
Feasibility 0-100 + template
D3.1 seo base $0.5000 USDC / call -
Hermes Schema — JSON-LD● down
Valid JSON-LD Eligibility+Impact 0-100
D3.1 seo base $0.2000 USDC / call -
Hermes SEO-AEO Auditor● down
Dual SEO+AEO readability 0-100
D3.1 seo base $0.1500 USDC / call -
5-pillar SEO audit technical content authority UX AEO with German Bavaria focus. Scores 0-100 schema-ready. 0.30 per audit Base USDC.
D3.1 seo base $0.3000 USDC / call -
Technical SEO audit for a public HTTPS URL: title/meta, headings, canonical, robots/indexability, structured data, image-alt coverage, score and grade.
D3.3 seo baseeip155:8453 $0.0100 USDC / call -
SEO PAA Expand● down
Expand people-also-ask questions for a keyword. x402.
E1.0 seo base $0.0100 USDC / call -
SEO SERP Snippets● down
SERP-style snippets for a keyword. x402 Base USDC.
E1.0 seo base $0.0200 USDC / call -
SEO Question Ideas● down
People-also-ask style what/how/why question expansion for SEO and FAQ content agents. GET ?keyword=
E1.0 seo base $0.0200 USDC / call -
SEO Keyword Ideas● down
Up to ~300 long-tail keyword ideas (Google autocomplete expansion) per call for SEO/content agents. GET ?keyword=
E1.0 seo base $0.0100 USDC / call