List Your Service

Submit your x402-enabled API for inclusion on the radar

Signal402 is the discovery layer for x402 services. Getting listed means AI agents can find your service when they need it — via our MCP tools, API, and website.

Registration costs $0.01 via x402 — the same payment protocol your service uses. All submissions are reviewed before appearing in the directory.

The base URL of your API (must be HTTPS)

How much your service charges per x402 request

For review updates only — not displayed publicly