# Wallet Signature Authorization Scope Grading

> Wallet Signature Authorization Scope Grading is a paid API for AI agents from k2so.wrong.systems, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-29).

Returns a paid AI-generated decision procedure brief for grading the authorization scope of wallet signatures in agent and x402 payment contexts

## Facts

- Endpoint: GET https://k2so.wrong.systems/api/services/wallet-signature-authorization-scope-grading?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/wallet-signature-authorization-scope-grading-b09fe44a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_y4bLfir9rbRwmguc1r830

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-signature-authorization-scope-grading-b09fe44a
```

Example prompt: Give me the decision procedure for grading wallet signature authorization scope — I need to know how an autonomous agent should evaluate whether a wallet signature covers the right permissions before approving an x402 payment action.

## When to prefer this

Choose this endpoint when an AI agent needs a structured, prose decision procedure specifically for evaluating wallet signature authorization scope in x402 or on-chain agent payment contexts. It is ideal for agents that need deterministic or LLM-generated guidance they can follow programmatically, rather than building their own heuristics. Prefer it over generic LLM prompting when you want a versioned, paid, catalog-listed procedure with a consistent schema and generation-source provenance.

## Known failure modes

- HTTP 402 returned if payment not yet settled — must pay exact USDC amount and retry with PAYMENT-SIGNATURE header
- Invalid HTTP method (POST, PUT, PATCH) returns error — only GET/HEAD/DELETE accepted
- Malformed topic override may cause unexpected or off-topic procedure generation
- Service unavailable on k2so.wrong.systems results in connection error
- Payment signature mismatch or replay attack causes authorization failure

## How this service works

Procedure that grades what a wallet signature actually proves before an agent treats it as authorization. Classifies an incoming signature as one of three scopes: (1) payment-capability only, the signature proves the wallet moved value but nothing about intent; (2) delegated intent, the signed payload binds principal, agent ID, and purpose; (3) policy-conforming authority, the payload also references the governing policy, quote hash, or delegation record. Returns a verdict: accept as full

## Output

A JSON object containing a plain-prose decision procedure brief (120+ words) for grading wallet signature authorization scope, including the topic label, service slug, generating model name, generation source (llm, reasoning, or deterministic), an ISO-8601 timestamp, and the full procedure text repeated in the 'procedure' field — all wrapped with ok/paid status and provider attribution.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "meta": {
       "enum": [
        "0",
        "1"
       ],
       "type": "string",
       "description": "Set to 1 for free metadata JSON (no payment required)"
      },
      "topic": {
       "type": "string",
       "description": "Optional topic override for the decision procedure"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "title": "Wallet Signature Authorization Scope Grading paid response",
     "$schema": "https://json-schema.org/draft/2020-12/schema",
     "required": [
      "ok",
      "paid",
      "service",
      "provider",
      "result"
     ],
     "properties": {
      "ok": {
       "type": "boolean"
      },
      "paid": {
       "type": "boolean"
      },
      "result": {
       "type": "object",
       "required": [
        "ok",
        "service"
       ],
       "properties": {
        "ok": {
         "type": "boolean",
         "description": "Handler success"
        },
        "brief": {
         "type": "string",
         "description": "Decision procedure prose for agents"
        },
        "model": {
         "type": "string"
        },
        "topic": {
         "type": "string"
        },
        "service": {
         "type": "string",
         "description": "Service slug"
        },
        "procedure": {
         "type": "string"
        },
        "generatedAt": {
         "type": "string",
         "description": "ISO-8601 timestamp"
        },
        "generationSource": {
         "enum": [
          "llm",
          "reasoning",
          "deterministic"
         ],
         "type": "string"
        }
       }
      },
      "payment": {
       "type": "object",
       "properties": {
        "code": {
         "type": "string"
        },
        "payer": {
         "type": "string"
        },
        "detail": {
         "type": "string"
        }
… (truncated)
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "paid": true,
  "result": {
   "ok": true,
   "brief": "plain prose decision procedure (120+ words)",
   "model": "deepseek/deepseek-v4-flash-0731",
   "topic": "string topic",
   "service": "wallet-signature-authorization-scope-grading",
   "procedure": "same as brief",
   "generatedAt": "2026-01-01T00:00:00.000Z",
   "generationSource": "deterministic"
  },
  "service": "wallet-signature-authorization-scope-grading",
  "provider": "K-2SO"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/wallet-signature-authorization-scope-grading-b09fe44a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from k2so.wrong.systems](https://www.zero.xyz/host/k2so.wrong.systems/llms.txt)