# Wallet Signing Safety Pack (GET) — Pre-Sign Risk Analysis

> Wallet Signing Safety Pack (GET) — Pre-Sign Risk Analysis is a paid API for AI agents from gpt55.558686.xyz, paid per call via x402, $0.018/call, status unknown (last checked 2026-09-14).

Analyzes EIP-712 typed data, EVM calldata, and x402 payment quotes to produce a risk assessment, decision checklist, and routing hints before a wallet signs or pays — without executing any transaction.

## Facts

- Endpoint: GET https://gpt55.558686.xyz/v1/tools/wallet-signing-safety-pack
- Price: $0.018/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/wallet-signing-safety-pack-get-pre-sign-risk-analysis-d4d1d3a6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_6K5p710A1GgTG8lNP-YP9

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 wallet-signing-safety-pack-get-pre-sign-risk-analysis-d4d1d3a6
```

Example prompt: Before I sign this transaction, can you run a wallet signing safety check on it? The calldata is 0xa9059cbb000000000000000000000000abcdef1234567890abcdef1234567890abcdef12000000000000000000000000000000000000000000000000002386f26fc10000, the recipient is 0xAbCdEf1234567890AbCdEf1234567890AbCdEf12, on Base (chain ID 8453), and I want to spend no more than 0.018 USDC — give me risk flags and a decision checklist.

## When to prefer this

Use this endpoint when an AI agent or wallet UI needs a lightweight, read-only pre-signing risk assessment before presenting a sign/approve decision to a user. Prefer it over on-chain simulation tools when no RPC call or private key should be involved, and over generic security scanners when x402 payment quote validation and EIP-712 typed data analysis are both needed in a single response. The GET variant is ideal for agents, crawlers, and wallets that prefer query parameters over JSON bodies.

## Known failure modes

- Missing required 'input' wrapper or method field returns 400 validation error
- Malformed or oversized calldata/typedData (>20000 chars) rejected with schema validation error
- Invalid chain ID or unrecognized network string may reduce analysis accuracy
- x402 payment not provided or insufficient USDC results in 402 Payment Required
- Ambiguous or conflicting query parameters (e.g. both 'calldata' and 'data') may produce partial analysis
- Very complex ABI-encoded calldata may yield lower-confidence risk flags

## How this service works

Build a single wallet/agent pre-signing decision pack from optional EIP-712 typed data, EVM calldata, expected chain, known addresses, and x402 spend policy. Returns risk levels, risk flags, buyer decision, copy-paste checklist, and first-payment routing hints without using a private key, producing a signature, sending a transaction, broadcasting, or calling external RPC. GET variant for agents, crawlers, and wallets that prefer query parameters over a JSON body. Pay up to $0.018 per request with x402 USDC on Base.

## Output

Returns a structured safety pack including: an overall risk level (e.g. low/medium/high), a list of risk flags (e.g. unverified recipient, unusual calldata patterns, chain mismatch), a buyer decision recommendation (approve/reject/review), a copy-paste pre-signing checklist, and first-payment routing hints for x402 flows. No private key, signature, or on-chain action is produced.

## 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",
     "properties": {
      "to": {
       "type": "string",
       "maxLength": 80
      },
      "data": {
       "type": "string",
       "maxLength": 20000,
       "minLength": 2
      },
      "json": {
       "type": "string",
       "maxLength": 50000,
       "minLength": 2
      },
      "text": {
       "type": "string",
       "maxLength": 50000,
       "minLength": 2
      },
      "chain": {
       "type": "string",
       "maxLength": 80
      },
      "value": {
       "oneOf": [
        {
         "type": "string"
        },
        {
         "type": "number"
        },
        {
         "type": "object",
         "additionalProperties": true
        }
       ]
      },
      "target": {
       "type": "string",
       "maxLength": 80
      },
      "calldata": {
       "type": "string",
       "maxLength": 20000,
       "minLength": 2
      },
      "typedData": {
       "oneOf": [
        {
         "type": "object",
         "additionalProperties": true
        },
        {
         "type": "string",
         "maxLength": 50000,
         "minLength": 2
        }
       ]
      },
      "typed_data": {
       "oneOf": [
        {
         "type": "object",
         "additionalProperties": true
        },
        {
         "type": "string",
         "maxLength": 50000,
         "minLength": 2
        }
       ]
      },
      "quote_asset": {
       "type": "string",
       "maxLength": 120
      },
      "buyer_intent": {
       "type": "string",
       "maxLength": 240
      },
      "quote_pay_to": {
       "type": "string",
       "maxLength": 80
      },
      "quote_scheme": {
       "type": "string",
       "maxLength": 40
      },
      "payment_quote": {
       "type": "object",
       "additionalProperties": true
      },
      "quote_network": {
       "type": "string",
       "maxLength": 80
      },
      "known_addresses": {
       "type": "object",
       "additionalProperties": {
        "type": "string"
       }
      },
      "quote_amount_usd": {
       "type": "number",
       "minimum": 0
      },
      "expe
… (truncated)
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/wallet-signing-safety-pack-get-pre-sign-risk-analysis-d4d1d3a6/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from gpt55.558686.xyz](https://www.zero.xyz/host/gpt55.558686.xyz/llms.txt)