x402 paid APIs: MCP servers, A2A agents and x402 APIs
Pay-per-call HTTP APIs that accept x402 payments (USDC), callable by agents with no account or API key. 1220 listings in the Rooms directory, 1210 answering our latest daily check. Each one links to its endpoint, how to call it and its live status.
- Second Eyes Agent Workflow Services Live MCP
Workflow diagnostics, capability routing, and x402 settlement for MCP-compatible agents.
MCP server · io.github.This-Is-Hellgate
- Signal Oracle Live MCP
Pay-per-call change-intelligence feeds for AI agents over x402 (deps, security, regs, tariffs)
MCP server · io.github.NeruoticFarrow
- Skavio USDC Paid Micro-APIs Live MCP
x402 USDC-paid MCP tools: 7-chain transaction checks, PDF evidence and DNS/TLS audits.
MCP server · eu.skavio
- SkillAudit Live MCP
Security scanner for AI agent skills and MCP servers. Detects credential theft, data exfiltration, prompt injection, obfuscated code, and 80+ threat patterns. Free API + CLI (npx skillaudit). Premium deep scans via x402…
MCP server · megamind-0x
- Solana Pulse: agent safety layer Live MCP
Stops AI agents losing money on Solana: pre-sign checks, intent matching, token verdicts. x402 USDC.
MCP server · io.github.Timothymycompc
- Stock Bloc Live MCP
SEC filing jobs, 13F holdings, market data, quant scores for agents. x402 USDC pay-per-call on Base.
MCP server · io.github.Jaywestphilly
- Stockfilm. Authentic Vintage Footage Live MCP
Search and license 217,000+ authentic vintage 8mm home movie clips from the 1930s-1980s. Remote MCP server with 6 tools over Streamable HTTP. Text search, visual similarity, rough-cut timeline builder, rights verificati…
MCP server · stockfilm
- Stringer Grounded Synthesizer Live MCP
Grounded synthesis from public sources. 3 free calls total; then $0.10 brief or $0.25 deep via x402.
MCP server · app.getstringer
- SYRI — Stablecoin Yield Risk Index Live MCP
0-100 risk score for stablecoin yield venues (Aave, Morpho, Ondo, Ethena). Pay per call via x402.
MCP server · ai.rfsrisk
- The STALL (thebrierfox) Live MCP
293 AI-callable finance and data tools over MCP. No API keys required. US stocks, crypto, DeFi, macro, prediction markets, sanctions, on-chain intelligence. x402 USDC pay-per-call on Base. Built by IntuiTek1.
MCP server · thebrierfox
- Token risk x402 Live MCP
Pre-trade token safety checks for AI agents on Solana and Base. x402 USDC per call, no key.
MCP server · com.ogenalabs
- VerifyPulse Email Verification & DNS Security Live MCP
Real-time RFC 5322 email verification, SPF/DMARC DNS audits & B2B leads (x402 Base USDC).
MCP server · io.github.MohDev212
- Wever Labs Agent Products Live MCP
Agent commerce: 27 tools, 10 production services, signed authority, planning, Base USDC x402.
MCP server · io.github.CodeWever
- What Agents Buy Live MCP
Independent measured reviews of x402 API sellers: pre-payment verdicts and accuracy grades.
MCP server · com.whatagentsbuy
- Wizeb AI-Native Index Live MCP
AI-Native Index scoring, PDF report, Wizeb Q&A, and an Enhanced report agents buy over x402.
MCP server · com.wizeb
- zlurp Live MCP
Web scraping for AI agents. Convert any URL to clean markdown via x402 micropayments on Base.
MCP server · zlurp
Related capabilities
On-chain dataTrading & marketsResearchAI models & inferenceAgent infrastructureWeb scrapingMaps & travelEmail
How to use one
MCP servers plug into Claude, ChatGPT, Cursor and other AI clients; A2A agents take tasks over JSON-RPC; x402 APIs charge per call in USDC with no account. Guides: A2A vs MCP · How to call an A2A agent · x402 for agents.
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