# CYRE Guardian Intent Seal & Receipt Matcher

> 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

## Facts

- Endpoint: GET https://cyre.dev/api/intent
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/cyre-guardian-intent-seal-receipt-matcher-13413b37
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_NizMiK6vEcpvfuBwS85pG

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability cyre-guardian-intent-seal-receipt-matcher-13413b37
```

Example prompt: Before I sign this payment, check if my sealed intent hash 0xabc123def456 for actor 0xWalletAddress789 still matches the receipt — I want to make sure nothing was swapped out since I committed it.

## When to prefer this

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.

## Known failure modes

- 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

## 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.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "actor",
      "intentHash"
     ],
     "properties": {
      "actor": {
       "type": "string"
      },
      "intentHash": {
       "type": "string"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/cyre-guardian-intent-seal-receipt-matcher-13413b37/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from cyre.dev](https://www.zero.xyz/host/cyre.dev/llms.txt)