Best x402 APIs (2026), ranked by real usage
The most-used pay-per-call APIs on the x402 network, by on-chain calls in the last 30 days.
Every service below is a live x402 endpoint an AI agent can call and pay for in USDC, no account or key. This list is ranked by actual paid calls over the last 30 days (from the public on-chain registry), so it reflects what agents really use, not marketing. Open any one for its price and copy-paste code, or search all services.
1. x402.twit.sh · search live
Search Twitter/X tweets with advanced filters. Returns up to 20 tweets per page, most recent first, with pagination. At least one filter required. Par
$0.006 USDCBase22,812 calls / 30d
2. agents.chain.link · :workflowName live
Chainlink For Agents: execute a catalog workflow by workflow name.
$0.01 USDCBase15,321 calls / 30d
3. stableenrich.dev · search live
Exa Search - Neural search across the web
$0.01 USDCBase9,293 calls / 30d
4. win.oneshotagent.com · email live
Email deliverability verification
$0.001 USDCBase7,594 calls / 30d
5. win.oneshotagent.com · people live
People and contact discovery
$0.01 USDCBase7,234 calls / 30d
6. agents.chain.link · submit live
Chainlink For Agents: submit a signed operation payload.
$0.002 USDCBase6,765 calls / 30d
7. win.oneshotagent.com · person live
Deep person research — returns enrichment, social profiles, articles, and dossier
$0.05 USDCBase5,484 calls / 30d
8. BlockRun.AI live
Project mindshare time series.
$0.0075 USDCBase5,101 calls / 30d
9. api.deepnets.ai · watchlist live
The active deepnets watchlist - high-volume tokens that passed the safety screen, with current safety data.
$0.01 USDCSolana3,967 calls / 30d
10. x402.tavily.com · search live
Tavily Search - advanced mode
$0.01 USDCBase3,706 calls / 30d
11. x402.twit.sh · mentions live
Get the latest tweets that mention the authenticated user (the notifications timeline). Returns up to 20 tweets per page, most recent first, with pagi
$0.006 USDCBase3,087 calls / 30d
12. Exa live
Exa /search endpoint
$0.007 USDCBase, Solana2,667 calls / 30d
13. win.oneshotagent.com · email live
Email enrichment and validation
$0.005 USDCBase2,409 calls / 30d
14. Otto AI live
Real-time crypto market news with sentiment analysis and top headlines ranked by importance.
$0.001 USDCBase, Polygon, Solana2,291 calls / 30d
15. CuseTheJuice Email live
CuseTheJuice agent email on Base USDC: create accounts, list and read email, send, reply, search, folders, attachments, trust index, password recovery
$0.01 USDCBase1,995 calls / 30d
16. blockint.ai · :address live
Screen a blockchain address against the C3 community fraud database. Returns 'caution' if the address has reports or is OFAC-sanctioned, 'no_c3_report
$0.01 USDCBase, Solana1,951 calls / 30d
17. BlockRun.AI live
Query Polymarket markets with filtering, sorting, and pagination
$0.001 USDCBase1,826 calls / 30d
18. api.deepnets.ai · flagged-tokens live
List of recently flagged Solana tokens (DANGEROUS or RISKY safety level) with reasons.
$0.01 USDCSolana1,809 calls / 30d
19. x402.twit.sh · tweets live
Bulk look up multiple Twitter/X tweets by their numeric tweet IDs in a single request. Each tweet includes full text, author profile, and engagement m
$0.01 USDCBase1,710 calls / 30d
20. stableenrich.dev · people-enrich live
PDL Person Enrich — career history, emails, phone. Use `profile` for LinkedIn URLs. Prefer email when known. $0.20/request. No match: HTTP 200, status
$0.2 USDCBase1,398 calls / 30d
21. CuseTheJuice Email live
CuseTheJuice agent email on Base USDC: create accounts, list and read email, send, reply, search, folders, attachments, trust index, password recovery
$0.01 USDCBase1,373 calls / 30d
22. stableenrich.dev · search live
Firecrawl Search - Search the web
$0.0252 USDCBase1,358 calls / 30d
23. BlockRun.AI live
Query Kalshi markets with filtering, sorting, and pagination
$0.001 USDCBase1,193 calls / 30d
24. CuseTheJuice live
CuseTheJuice agent APIs on Base USDC: email relay, spam and phishing checks, IP threat scoring, Base Notary hash anchors, and Jupiter Solana swap quot
$0.01 USDCBase1,133 calls / 30d
25. x402.browserbase.com · create live
Create a Browserbase browser session with prepaid time. Returns a WebSocket connection URL for browser automation.
$0.002 USDCBase, solana1,066 calls / 30d
26. Otto AI live
Hyperliquid perpetuals market data: live mark/oracle price, funding rate, open interest, max leverage, and size specs for any tradable asset.
$0.001 USDCBase, Polygon1,017 calls / 30d
27. api.deepnets.ai · wallet-details live
Wallet profile: funding source, network membership, exchange attribution, tags, and tokens created by this wallet.
$0.01 USDCSolana997 calls / 30d
28. blockint.ai · :domain live
Screen a domain name for phishing, fraud, and scam association in the C3 community database. Returns risk score and matching report details.
$0.01 USDCBase, Solana968 calls / 30d
29. blockint.ai · search live
Full-text search across all 64,000+ public C3 community fraud reports. Search by keyword, address, domain, crime type, or project name.
$0.01 USDCBase, Solana918 calls / 30d
30. www.surplusintelligence.ai · completions live
Get OpenAI-compatible inference from many models at market prices via Surplus Intelligence.
$0.0033 USDCBase880 calls / 30d
Building an agent that needs to find the right paid API at runtime? Query the whole registry
through the x402hub API.
ad slot · a crypto-native, no-tracking ad loads here in production
Query this registry programmatically. Every service here is searchable through the
x402hub API, an x402-payable endpoint your agents call and pay per request in USDC.
https://api-service-sandy.vercel.app · GET /api/search?q=... · $0.002 / call
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