# PriorSeal Evidence Receipt Retrieval

> PriorSeal Evidence Receipt Retrieval is a paid API for AI agents from priorseal.xyz, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-29).

Retrieves a verifiable, portable evidence receipt linking a pre-execution authorization to observed EVM or Solana blockchain execution by receipt ID.

## Facts

- Endpoint: GET https://priorseal.xyz/v1/evidence/receipts/%7BreceiptId%7D?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/priorseal-evidence-receipt-retrieval-4a264f44
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ZwChDq4_7vw5UV68uEJNX

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 priorseal-evidence-receipt-retrieval-4a264f44
```

Example prompt: Can you pull the PriorSeal evidence receipt for receipt ID psr_abc123 so I can share the portable verification bundle with my auditor?

## When to prefer this

Choose this endpoint when you need to retrieve a cryptographically portable evidence receipt tying a prior authorization to an observed EVM or Solana execution, especially when you need to share that proof with an independent third party who will verify it locally. Prefer this over generic blockchain explorers when the requirement is an explicit, signed authorization linkage rather than just transaction data. Best suited for compliance, audit, and dispute-resolution workflows where portable, independently verifiable attestation is required.

## Known failure modes

- Receipt ID not found — returns an error if the provided receiptId does not exist or has not yet been issued
- Invalid receiptId format — if the receiptId fails length or format constraints, the request is rejected
- Expired or revoked receipt — if the authorization evidence has been invalidated, the response may indicate unavailability
- Network or service unavailability — transient errors may prevent retrieval of valid receipts

## How this service works

Connect explicit, pre-execution authorization to observed EVM and Solana execution with portable evidence another party can verify independently.

## Output

Returns a structured JSON evidence bundle in priorseal.evidence.v1 format, including the schema version, subject receiptId, a unique evidenceId, and a verification object specifying the verification method (e.g. verification_bundle) and instructions for independent local verification using the issuer's key trust. The bundle is portable and can be shared with any party for independent verification.

## 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",
    "pathParams"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "pathParams": {
     "type": "object",
     "required": [
      "receiptId"
     ],
     "properties": {
      "receiptId": {
       "type": "string",
       "maxLength": 512,
       "minLength": 1
      }
     },
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "json"
    },
    "format": {
     "type": "string"
    },
    "example": {}
   },
   "additionalProperties": false
  }
 },
 "additionalProperties": false
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "format": "priorseal.evidence.v1",
 "example": {
  "schema": "priorseal.evidence.v1",
  "subject": {
   "receiptId": "psr_example"
  },
  "evidenceId": "pse_example",
  "verification": {
   "method": "verification_bundle",
   "required": "VERIFY_LOCALLY_WITH_INDEPENDENT_ISSUER_KEY_TRUST"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/priorseal-evidence-receipt-retrieval-4a264f44/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from priorseal.xyz](https://www.zero.xyz/host/priorseal.xyz/llms.txt)