# CYRE Guardian Handshake

> CYRE Guardian Handshake 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).

Compares two Solana addresses or Guardian Passports and returns a compatibility brief with score delta, risk mismatch, and overlapping behavioral patterns.

## Facts

- Endpoint: GET https://cyre.dev/api/handshake
- 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-handshake-ad5ae19b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_2hKVXd96IMJhWjnQs8FBk

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-handshake-ad5ae19b
```

Example prompt: Run a Guardian Handshake between these two Solana addresses — 7xKp...aB3 and 4mNq...rW9 — and give me the compatibility brief, score delta, and any risk mismatches between them.

## When to prefer this

Use this endpoint when you need to compare two specific counterparties — via Guardian Passports or raw Solana addresses — and want a structured compatibility brief with quantified score delta and pattern overlap. Prefer this over single-address endpoints when the key question is the relationship or mismatch between two parties rather than the absolute risk of one. Best suited for pre-settlement, pre-trade, or agent pairing scenarios where bilateral compatibility matters.

## Known failure modes

- Missing both tokenA/tokenB and addressA/addressB — returns error requiring at least one pair of identifiers
- Invalid or expired Guardian Passport tokens — returns error indicating invalid attestation
- Unrecognized Solana address format — returns validation error
- Address with no on-chain history — may return minimal or inconclusive brief
- Payment not received (x402) — returns 402 Payment Required before processing

## How this service works

Guardian Handshake — two Passports (or two Solana addresses), one compatibility brief. Score delta, risk mismatch, overlapping patterns. Patterns, not verdicts. Agent guide: https://cyre.dev/SKILL.md

## Output

Returns a JSON object with an 'ok' boolean, a 'kind' string identifying the result type, a 'brief' natural-language compatibility summary, a 'delta' object containing the score difference and risk mismatch details, and a 'disclaimer' noting these are patterns rather than verdicts.

## 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",
     "properties": {
      "tokenA": {
       "type": "string",
       "description": "Guardian Passport token for side A"
      },
      "tokenB": {
       "type": "string",
       "description": "Guardian Passport token for side B"
      },
      "addressA": {
       "type": "string",
       "description": "Solana address for side A (when tokens not provided)"
      },
      "addressB": {
       "type": "string",
       "description": "Solana address for side B (when tokens not provided)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "ok": {
       "type": "boolean"
      },
      "kind": {
       "type": "string"
      },
      "brief": {
       "type": "string"
      },
      "delta": {
       "type": "object"
      },
      "disclaimer": {
       "type": "string"
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/cyre-guardian-handshake-ad5ae19b/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)