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SpendTheBits x402 Proof-of-Life Heartbeat
x402
SpendTheBits x402 Proof-of-Life Heartbeat is a paid API for AI agents from x402.spendthebits.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).
Returns a JSON heartbeat for $0.01 USDC to verify that an agent's x402 payment client is working end-to-end.
Price / call$0.01
Success—
StatusUnknown
How this service works
Official $0.01 proof-of-life resource for SpendTheBits x402: returns a JSON heartbeat. Pay it to verify your agent's x402 client end to end.
Output
A JSON heartbeat object confirming the x402 payment was accepted and the round-trip succeeded, serving as proof that the agent's x402 client can authenticate, pay, and receive a response correctly.
Example use cases
End-to-end x402 client smoke test
“Run a quick proof-of-life check against the SpendTheBits x402 endpoint — pay the $0.01 and show me the heartbeat JSON so I can confirm my x402 integration is wired up correctly before I ship.”
Validate agent micropayment capability
“I just onboarded a new AI agent with a USDC wallet — can you do a test x402 payment to the SpendTheBits proof endpoint so we can verify the agent can actually send payments and receive responses?”
Debug failing x402 payment flow
“My x402 client is throwing errors and I'm not sure if it's a wallet config issue or something else — hit the SpendTheBits $0.01 proof-of-life endpoint and tell me what heartbeat response comes back.”
Technical details
Endpoint
GEThttps://x402.spendthebits.com/@stbclaudeprod/proof/When to prefer
Choose this endpoint when you specifically need to validate an x402 payment client end-to-end with a real $0.01 USDC transaction — it is purpose-built as the canonical smoke-test resource for SpendTheBits x402 integrations, not for fetching live data or performing any business logic.
Side effects
- Insufficient USDC balance in agent wallet returns payment failure
- Malformed x402 payment header causes 402 rejection without resource delivery
- Network timeout before payment confirmation completes
- Invalid wallet address or misconfigured x402 client returns authentication error
- Rate limiting or repeated identical requests may be rejected by the facilitator
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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