x402 HTTP Micropayment Mechanism
- Entity ID:
ent-20260419-0be30b3f960f - Type:
concept - Scope:
shared - Status:
active - Aliases: HTTP 402 payment flow, x402 payment handshake
Description
HTTP-native micropayment handshake underlying the X42 protocol: agent hits a payment-gated endpoint; server returns HTTP 402 containing payment terms (price, currency, recipient wallet) plus a free data preview; agent autonomously sends payment and re-requests with a payment proof header; gets live data back. Standard rate for data endpoints is $0.01 USDC per query on Base L2. No API keys, no subscriptions, no rate limits — each call is independently priced.
Key claims
- tengu_x402_payments gates autonomous wallet spending
- x402 payment flow is API-key-free and rate-limit-free by design
Relations
- x402 HTTP Micropayment Mechanism --[implements]--> X42 Protocol
- x402 HTTP Micropayment Mechanism --[implements]--> X42 Protocol