# x402 (x402.org)

Open HTTP payment standard where servers add one middleware line to demand per-request payment and clients pay via 402 responses.

- Atlas card: https://inite.ai/en/atlas/x402.org
- Site: https://x402.org
- For: API providers and AI agent builders who want to charge per request with stablecoin payments over HTTP
- Categories: agent-payments, finance
- Use not measured/100 · alive 100/100

## Used for

- add payment requirements to API endpoints
- let AI agents pay for API access
- monetize paywalled digital content per request

## Price

Not read yet.

## For developers

None found.
- Read 2026-11-03

## Your data

- Certifications stated: none
- Read 2026-11-03

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Source: INITE Atlas, https://inite.ai/en/atlas/x402.org. JSON: https://inite.ai/api/atlas/x402.org. MCP: https://inite.ai/api/mcp (atlas_lookup).