# SignGate Wallet Dossier – Agent Buyer Identity Preflight

> SignGate Wallet Dossier – Agent Buyer Identity Preflight is a paid API for AI agents from base-agent-preflight.bytoken2023.workers.dev, paid per call via x402, $0.03/call, status unknown (last checked 2026-09-14).

Returns a risk assessment and identity dossier for a blockchain wallet address, indicating whether an AI agent buyer passes governance checks before purchasing an x402-gated API, dataset, or tool.

## Facts

- Endpoint: GET https://base-agent-preflight.bytoken2023.workers.dev/v1/x402/agent-risk/wallet-dossier
- Price: $0.03/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/signgate-wallet-dossier-agent-buyer-identity-preflight-536741bb
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_QNIfrh6IVEwfJSMWxFTo8

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 signgate-wallet-dossier-agent-buyer-identity-preflight-536741bb
```

Example prompt: Before you spend any funds, run a preflight risk check on my agent wallet 0xAbCd1234... on the Base network and tell me whether it's cleared for x402 purchases.

## When to prefer this

Use this endpoint when an AI agent needs to perform a governance or compliance preflight check before executing an x402 micropayment purchase — particularly when the product being purchased has sensitivity, price, or approval-policy constraints. Prefer this over generic blockchain explorers when you need a structured risk score and buyer-identity assessment specifically designed for the x402 agent-commerce context.

## Known failure modes

- Invalid wallet address format (not a valid 0x... EVM address) returns an error
- Unsupported or unrecognized chain label returns an error or empty result
- Wallet with no on-chain history may return minimal identity/activity data
- Service unavailable or timeout from the Cloudflare Worker
- Rate limiting if called too frequently without payment
- Ambiguous risk flags without clear remediation guidance

## How this service works

Machine-payable service intelligence for discovering, verifying, and monitoring identity, risk, authorization, execution-preflight, and evidence APIs before autonomous agents spend.

## Output

A JSON object containing the network, product type, risk score (numeric), risk level (e.g. 'low'), an array of flags (empty if clean), an identity object, an activity summary, and a provenance object describing the wallet's on-chain history and assessed trustworthiness.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "chain",
      "address"
     ],
     "properties": {
      "chain": {
       "type": "string",
       "pattern": "^[A-Za-z0-9:_ -]{2,80}$",
       "description": "Chain or network label for the wallet dossier."
      },
      "address": {
       "type": "string",
       "pattern": "^0x[a-fA-F0-9]{40}$",
       "description": "Wallet or contract address to summarize."
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "network": {
       "type": "string"
      },
      "product": {
       "type": "string"
      },
      "activity": {
       "type": "object"
      },
      "identity": {
       "type": "object"
      },
      "assessment": {
       "type": "object"
      },
      "provenance": {
       "type": "object"
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "network": "eip155:8453",
  "product": "wallet-dossier",
  "assessment": {
   "flags": [],
   "risk_level": "low",
   "risk_score": 0
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/signgate-wallet-dossier-agent-buyer-identity-preflight-536741bb/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from base-agent-preflight.bytoken2023.workers.dev](https://www.zero.xyz/host/base-agent-preflight.bytoken2023.workers.dev/llms.txt)