Full-text search across indexed x402 protocol resources for $0.02 per query.
What it does
x402scan is a payment data explorer and registry for the x402 protocol, built by Merit Systems. This specific endpoint (`/api/x402/resources/search`) provides full-text search across all indexed x402-protected resources. You can filter results by tags and chains (Base, Solana), and paginate through results. Each call costs a fixed $0.02 USD micropayment via the x402 protocol.
x402scan indexes the broader x402 ecosystem — tracking transactions, wallets, merchants, facilitators, and registered resources across Base and Solana chains. The search endpoint lets agents and developers discover x402-protected APIs and services programmatically. Query parameters include `q` (required search term), `tags` (comma-separated tag IDs), `chains` (comma-separated, e.g. "base,solana"), `page` (0-based index), and `page_size` (1–100, default 10).
The endpoint is part of a larger suite of x402scan data APIs, all priced at $0.01–$0.02 per call. The platform also offers free registry endpoints (requiring SIWX wallet auth) for registering new x402 resources, and a send endpoint for transferring USDC. As of the crawl, the x402 ecosystem tracked by x402scan shows ~97K daily transactions across ~269 sellers and ~10K buyers.
Capabilities
Use cases
- —Discovering x402-protected APIs and services by keyword
- —Finding x402 endpoints filtered by blockchain (Base or Solana)
- —Building agent tooling that dynamically discovers payable endpoints
- —Monitoring the x402 ecosystem for new resources matching specific tags
Fit
Best for
- —AI agents that need to discover x402-payable endpoints programmatically
- —Developers building on the x402 protocol who need resource discovery
- —Analytics dashboards tracking the x402 ecosystem
Not for
- —General web search unrelated to x402 protocol resources
- —Free/unauthenticated bulk data scraping (every call costs $0.02)
Quick start
curl -H "X-Payment: <x402_payment_header>" \
"https://www.x402scan.com/api/x402/resources/search?q=weather&chains=base&page=0&page_size=10"Endpoint
Quality
Full OpenAPI schema with clear parameter definitions and pricing metadata is available. However, the probe returned 404 on both GET and POST for this specific endpoint path (possibly due to the probe hitting /api/data/resources/search instead of /api/x402/resources/search), no response examples are documented, and no dedicated docs page exists. The OpenAPI spec is detailed but response schemas are absent.
Warnings
- —Probe returned 404 on both POST and GET — the listed endpoint URL (/api/data/resources/search) may differ from the OpenAPI path (/api/x402/resources/search); verify the correct URL before integrating.
- —No response schema or example responses are documented in the OpenAPI spec.
- —No dedicated documentation page found (x402scan.com/docs returns 404).
Citations
- —The search endpoint costs $0.02 per call (fixed, USD)https://www.x402scan.com
- —x402scan is described as a payment data explorer and registry for the x402 protocolhttps://www.x402scan.com
- —Search supports q, tags, chains, page, and page_size parametershttps://www.x402scan.com
- —The ecosystem shows ~97K daily transactions, ~10K buyers, ~269 sellershttps://www.x402scan.com
- —Built by Merit Systemshttps://www.x402scan.com