x402 List

x402 Protocol Service Directory

Submit a Service or Facilitator

Add your x402-compatible service to the directory. Browse existing services to see what's already listed. After submission, we will automatically probe your endpoints for valid HTTP 402 responses, then manually review the results before listing. You can also use our API to submit programmatically. Submissions on free hosting or dev-tunnel domains (vercel.app, workers.dev, ngrok, trycloudflare, etc.) are not accepted: please submit from your own domain.

Running a payment facilitator instead? Switch the form to Facilitator: we check your settler addresses for real on-chain settlement activity, then review manually before listing. Browse existing facilitators.

SUBMISSION FORM

Submission type *

Service: an API that answers HTTP 402. Facilitator: settlement infrastructure that executes x402 payments on-chain.

Link the product's own site or documentation, not a code repo, social profile, or hosting-platform page. This link is shown to humans on your listing.

Settler addresses, one per line: 0x for EVM chains, base58 for Solana. We check them for recent on-chain settlement activity. Max 25.

Networks *

Select every chain your facilitator settles on. Chains outside this list are recorded as claims and not measured automatically.

Directory ID, lowercase with dashes. Existing and reserved operator names (coinbase, stripe, ...) cannot be claimed.

Self-reported settlement volume. Cross-checked against on-chain data during review, never displayed as fact.

HOW IT WORKS

  1. 1. Submit your service or facilitator details
  2. →
  3. 2. We probe endpoints (HTTP 402) or settler addresses (on-chain)
  4. →
  5. 3. Manual review & approval
  6. →
  7. 4. Listed in directory

REQUIREMENTS

Services must respond with HTTP 402 Payment Required and a valid x402 accepts[] payload on protected endpoints. All submissions are manually reviewed before appearing in the directory. See About for more on how the protocol works.

Facilitators must operate settler addresses with real x402 settlement activity on-chain. We probe the submitted addresses for recent USDC settles on the supported chains; approved facilitators are listed right away and marked on-chain once settlement volume is measured.

One submission per email address every 7 days, tracked separately for services and facilitators. Submissions still pending after the 7-day review window are automatically rejected, and you will be notified by email either way.