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CYRE Guardian Intent Seal & Receipt Matcher
x402
CYRE Guardian Intent Seal & Receipt Matcher is a paid API for AI agents from cyre.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-15).
Verifies a pre-committed intent hash against a receipt to detect bait-and-switch attacks before or after paying/signing
Price / call$0.002
Success—
StatusUnknown
How this service works
Guardian Intent Seal — hash your intent locally, seal it before you pay or sign, then match it on /api/receipt. Stops bait-and-switch. Patterns, not verdicts. Agent guide: https://cyre.dev/SKILL.md
Output
Returns a match result indicating whether the actor's intent hash aligns with the sealed receipt, exposing any discrepancy between the committed intent and what is being presented at signing/payment time. Provides pattern-based signals (not verdicts) to help the agent detect tampering or bait-and-switch.
Example use cases
Pre-payment bait-and-switch check
“I'm about to pay an x402 API — verify that my sealed intent hash 0xabc123 for actor address 0xMyWallet still matches the receipt before I authorize anything.”
Post-sign tamper detection
“I just signed a transaction for actor 0xAgentWallet — can you match intent hash 0xdef456 against the receipt to confirm nothing was swapped between when I sealed it and when I signed?”
Agentic workflow integrity guard
“My AI agent is about to release a payment to an external skill — check intent hash 0x789xyz for actor 0xAgentAddress against the receipt to make sure the payload matches what was originally committed.”
Technical details
Endpoint
GEThttps://cyre.dev/api/intentWhen to prefer
Use this endpoint when an AI agent needs to verify that a transaction or payment payload has not been altered between the time of intent commitment and the time of signing or payment execution. Prefer this over general risk-scoring endpoints when the specific concern is bait-and-switch or payload tampering rather than counterparty reputation. Best used as a pre-sign or pre-pay integrity check in agentic x402 payment workflows.
Side effects
- Intent hash not found — receipt does not exist for the given intentHash
- Actor address mismatch — intentHash exists but actor does not match the sealed record
- Malformed intentHash — returns 400 if the hash string is invalid or missing
- Payment required — 402 response if the x402 micropayment header is absent or invalid
- Stale or expired intent — receipt may no longer be available if too much time has passed
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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