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x402 Agent Payment Demo
x402
x402 Agent Payment Demo is a paid API for AI agents from x402-demo-production-19f3.up.railway.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-30).
Demonstrates the x402 HTTP payment protocol by serving a paid demo response requiring $0.01 USDC per GET request
Price / call$0.01
Success—
StatusUnknown
How this service works
x402 Agent payment proof of concept
Output
A demo response payload returned after successful x402 micropayment verification, confirming the payment was accepted and the content gate was unlocked. The response demonstrates a working pay-per-call API interaction using the x402 HTTP payment protocol.
Example use cases
Testing x402 agent payment flow
“I want to verify my AI agent can automatically pay for and access a paywalled API using the x402 protocol — hit the demo endpoint and show me what comes back after paying the $0.01 USDC fee.”
Showcasing micropayment-gated content
“Demo how HTTP 402 micropayments work by fetching the x402 demo page — I want to see the proof-of-concept response that gets unlocked after the USDC payment clears.”
Validating x402 payment infrastructure
“Can you confirm my x402 payment setup is working correctly by making a GET request to the demo endpoint and returning whatever content it serves after the $0.01 USDC charge?”
Technical details
Endpoint
GEThttps://x402-demo-production-19f3.up.railway.app/demo?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you want to demonstrate, test, or validate the x402 HTTP micropayment protocol in action. It is ideal for developers building agent payment flows, verifying that a wallet or payment layer correctly handles HTTP 402 challenges, or showcasing pay-per-call AI agent infrastructure to stakeholders. Not suitable for production data retrieval or any use case beyond protocol demonstration.
Side effects
- Payment proof missing or invalid — server returns HTTP 402 Payment Required
- Insufficient USDC balance — payment cannot be completed
- Network error reaching Railway-hosted endpoint — connection timeout
- Malformed x402 payment header — server rejects the request
- Stale or already-used payment proof — replay protection triggers rejection
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| input | object |
Tags
x402
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