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Crypto Microdata for Agents – x402 Payment Test (GET /crypto/test)
x402
Crypto Microdata for Agents – x402 Payment Test (GET /crypto/test) is a paid API for AI agents from kr-x402-mvp.kgy5612.workers.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-31).
Validates an x402 USDC micropayment end-to-end and returns a receipt plus links to the next available paid crypto-data endpoints.
Price / call$0.001
Success—
StatusUnknown
How this service works
Pay-per-call crypto microdata for trading/onchain AI agents via x402 (USDC on Base): Base gas, token risk, balances, multi-venue prices, Hyperliquid book/funding, kimchi premium. No API keys.
Output
Returns a JSON object with a timestamp, ok=true flag, paymentVerified=true, a receiptId for the completed micropayment, the echoed testRunId, a nextAction hint ('call_paid_data'), and an array of sibling endpoint paths the agent can call next (e.g. /crypto/base-gas, /crypto/simulate, /crypto/liquidations).
Example use cases
First-time x402 integration smoke test
“I just wired up my x402 USDC client on Base — can you fire a test call with echo 'onboarding-check' and testRunId 'smoke-001' so I can confirm the payment goes through and grab the receipt ID?”
Pre-trade agent payment validation
“Before my trading agent starts pulling live prices, verify the x402 payment flow is healthy by running a test call tagged testRunId 'pre-trade-run' and tell me which paid data endpoints are listed in the response.”
Correlation of payment test in a CI pipeline
“In my CI run, send a crypto test payment with testRunId 'ci-build-42' and echo 'ci-agent', then confirm paymentVerified is true and return the receiptId so I can log it.”
Technical details
Endpoint
GEThttps://kr-x402-mvp.kgy5612.workers.dev/crypto/test?utm_source=zero.xyzWhen to prefer
Use this endpoint as the cheapest ($0.001 USDC) way to verify that your x402 payment client, USDC wallet on Base, and HTTP plumbing are all working before spending budget on real crypto data calls. Prefer it over calling a substantive data endpoint for integration testing or CI health checks, since it is purpose-built for validation and returns receipt metadata plus a discovery list of next steps.
Side effects
- Payment not received or USDC balance insufficient — 402 Payment Required returned before any data
- Invalid or missing x402 payment header — request rejected before processing
- Worker cold-start or Cloudflare outage — 503 or timeout
- Echo or testRunId exceeds max length (64 / 100 chars) — validation error
- Network error reaching the Cloudflare Worker edge — connection timeout
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"t": "2026-10-28T14:00:00Z",
"ok": true,
"next": [
"/crypto/simulate",
"/crypto/ens",
"/crypto/liquidations?coin=BTC",
"/crypto/base-gas"
],
"receiptId": "rcpt_0b9f6c1e2a7d4c55",
"testRunId": "run-001",
"nextAction": "call_paid_data",
"paymentVerified": true
}
}Tags
x402
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