x402 Services
| Rank | Service | Category | Chains | Volume · 30d | Transactions · 30d | Buyers |
|---|---|---|---|---|---|---|
| — | QueryLines API querylines.com Surplus lines market data, per query. QueryLines aggregates U.S. excess & surplus (E&S / surplus lines) insurance market statistics -- premium, policy counts… | Data | Base | $0.00 | 0 | 0 |
| — | QuerySpigot Company API api.queryspigot.com Irish company lookup, name search and resolution with x402 v2 on Base. Lookup and search cost 0.01 native USDC; resolution costs 0.02. Documentation and… | Search | Base | $0.00 | 0 | 0 |
| — | api.questflow.ai questflow.ai AI service providing paid swarm operations through x402 endpoints. | AI | Base | $0.00 | 0 | 0 |
| — | api.rafidsystem.com rafidsystem.com Provides an API endpoint for analyzing property data. | Data | Base | $0.72 | 5 | 4 |
| — | api.recoupable.dev recoupable.dev An AI service that generates images through a paid API endpoint. | AI | Base | $0.15 | 1 | 1 |
| — | Reloadpi Catalog API reloadpi.com Global marketplace for digital vouchers, mobile top-ups, and eSIM data plans. Pay per API call with USDC on Base via x402. No account or KYC required. | Data | Base | $0.00 | 0 | 0 |
| — | Romny Polymarket Data api.romny.dpdns.org Paid Polymarket + copy-trade + RH×PM cross-venue feeds via standard x402. Catalog endpoints return HTTP 402 until settled via Agentic Wallet / CDP. | Data | Base | $0.04 | 3 | 1 |
| — | RQM Relay API rqm-relay.com Discovery, comparison, quoting, execution, and verification for machine capabilities. | Data | Base | $0.00 | 0 | 0 |
| — | RTK Motion Intelligence Platform rtkmotion.io Agent-to-agent paid access to 4D motion capture (BVH/robot trajectories), rehabilitation biomechanics, and location threat intelligence. | AI | Base | $0.00 | 0 | 0 |
| — | Run402 API run402.com Full-stack infrastructure for AI agents. Postgres, REST API, auth, file storage, static site hosting, serverless functions. Tier payments and image generation… | AI | Base | $0.40 | 4 | 4 |
| — | Safe4 Payment Authorization safe4.ai Decide whether an AI agent's proposed payment should be allowed, by testing it against the task the agent was actually given. Priced per call in USDC over x402. | AI | Base | $0.00 | 0 | 0 |
| — | api-sales 49110-a2faebhnaj4vebqe.splox.app A data service with no documented endpoints. | Data | Base | $0.00 | 0 | 0 |
| — | SALT19 Agent Utility Grid salt19.com SALT19 Agent Utility Grid with Proof402 machine-commerce preflight, x402 payment/delivery binding verification, Ed25519 signed receipts, and Merkle-batched… | Search | Base | $0.01 | 1 | 2 |
| — | ScrubMyText + Agent Infrastructure API scrubmytext.com 49 deterministic tools for text integrity, AI-agent controls, and contextual service-quality evidence. TrustMyChoice provides free public lookup and… | AI | Base | $0.00 | 0 | 0 |
| — | SECONDED public API secondedoracle.xyz SECONDED checks require agreement between two rival-lab models. Disagreement means NOT VERIFIED: pause or ask a human; no verdict is released and SECONDED… | AI | Base | $5.30 | 21 | 8 |
| — | Shoal API shoal.xyz Semantic data layer for crypto entities, events, relationships, and timelines. | Data | Base | $0.05 | 1 | 1 |
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