# CYRE Guardian Passport Delta

> CYRE Guardian Passport Delta is a paid API for AI agents from cyre.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).

Re-attests a wallet against a prior Guardian Passport token and returns score drift, risk-level flips, and signal changes since the last attestation.

## Facts

- Endpoint: GET https://cyre.dev/api/delta
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/cyre-guardian-passport-delta-e33763bc
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_udspD459iO9NOsJ-r3mpj

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-passport-delta-e33763bc
```

Example prompt: I have a Guardian Passport token from last week — can you re-attest that wallet and tell me if the risk score drifted, whether the risk level flipped, and what signals changed since then?

## When to prefer this

Use this endpoint when you already hold a prior Guardian Passport token and want to detect what has changed since that attestation — score drift, risk-level flips, and new signals — rather than generating a fresh full attestation from scratch. Prefer this over the base Passport endpoint when the goal is change detection and trend monitoring rather than initial attestation.

## Known failure modes

- Invalid or expired Passport token returns an error or empty delta
- Token not recognized or malformed yields a 4xx response
- Wallet no longer indexable or off-chain data unavailable may produce partial results
- Network or upstream data latency may cause delays in signal retrieval

## How this service works

Guardian Passport Delta — re-attest a wallet against a prior Passport and return score drift, risk-level flips, and signal changes. Patterns, not verdicts. Agent guide: https://cyre.dev/SKILL.md

## Output

Returns score drift (numeric change in risk score), risk-level flips (e.g. LOW→HIGH transitions), and changed signals since the prior Passport was issued — framed as patterns rather than final verdicts, enabling the agent to decide how to act on observed changes.

## 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": [
      "token"
     ],
     "properties": {
      "token": {
       "type": "string",
       "description": "Prior Guardian Passport token"
      }
     }
    }
   },
   "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-passport-delta-e33763bc/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)