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Submit Your L402 API

Add your Lightning-powered API to our registry.
Get discovered by AI agents and developers.

⚡
Listing fee: 1,000 sats plus the cost of one test call to your endpoint. We check your endpoint for free first and show the exact total before you pay. If the test call passes, your API is listed right away.
API Information
Endpoint Details
The URL that returns HTTP 402 with a Lightning invoice
e.g., "10 sats", "10-50 sats", "~100 sats/request"
Leave blank if pure L402 (no pre-registration needed)
Protocol Details
402 response includes WWW-Authenticate: L402 macaroon="...", invoice="..." header.
402 response body contains {"payment_request": "lnbc..."}.
402 response includes PAYMENT-REQUIRED header with USDC payment details.
For POST endpoints: describe the expected request body. Leave blank for GET.
Example of a successful response. Helps agents understand what to expect.
Contact
We'll notify you when your API is approved

Listing fee + test call

1,000 sats
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