# WHP Standing Guard Front-Door Evaluation

> WHP Standing Guard Front-Door Evaluation is a paid API for AI agents from standing-guard-service.lovable.app, paid per call via x402, $1/call, status unknown (last checked 2026-10-12).

Evaluates whether an agent or subject has recognized standing under Wheeler Hubbell Publishing authority, returning a cryptographically signed determination record

## Facts

- Endpoint: POST https://standing-guard-service.lovable.app/v1/evaluate?utm_source=zero.xyz
- Price: $1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/whp-standing-guard-front-door-evaluation-1c09844e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_WcipXFmN7dCT7US0Map_T

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 whp-standing-guard-front-door-evaluation-1c09844e -d '<json body>'
```

Example prompt: Can you evaluate whether the agent 'agent-42.example.com' has recognized standing under WHP authority with the claim 'This agent is authorized to access Wheeler Hubbell Publishing content on behalf of licensed subscribers'?

## When to prefer this

Use this endpoint when you need a machine-verifiable, cryptographically signed standing determination specifically under Wheeler Hubbell Publishing authority — particularly for gating agent access, compliance auditing, or any workflow where you need a tamper-evident record of whether a subject-claim pair is recognized within WHP bounds. Prefer this over generic identity or auth checks when the downstream system requires a WHP-specific signed record with Ed25519 attestation.

## Known failure modes

- Missing required fields (subject or claim) returns a validation error
- Claim exceeds 4000 character limit causes rejection
- Subject exceeds 2000 character limit causes rejection
- Unrecognized or malformed provenance object may result in determination with missing required fields flagged
- Payment failure ($1 USDC) blocks the request via x402 protocol
- Network or service downtime on lovable.app hosting returns 5xx error

## How this service works

WHP Standing front-door evaluation (ordinary x402 agents)

## Output

A JSON object containing a signed WHP evaluation record with: a determination outcome (e.g. 'RECOGNIZED WITH BOUNDARIES' or similar), a list of any required missing fields, a not_sealed_mark boolean, an Ed25519 signature (algorithm, base64url value, and public key), and a SHA-256 hex record hash for tamper verification.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "type": "object",
     "required": [
      "subject",
      "claim"
     ],
     "properties": {
      "claim": {
       "type": "string",
       "maxLength": 4000,
       "minLength": 1
      },
      "subject": {
       "type": "string",
       "maxLength": 2000,
       "minLength": 1
      },
      "provenance": {
       "type": "object",
       "properties": {
        "source": {
         "type": "string"
        },
        "evidence": {
         "type": "array",
         "items": {}
        },
        "authority": {
         "type": "string"
        }
       }
      }
     }
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "record": {
   "type": "WHP-FRONTDOOR-EVALUATION-v1",
   "determination": {
    "outcome": "RECOGNIZED WITH BOUNDARIES",
    "required_missing": []
   },
   "not_sealed_mark": true
  },
  "signature": {
   "alg": "Ed25519",
   "value_b64url": "base64url",
   "public_key_b64url": "base64url"
  },
  "record_hash": "sha256 hex"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/whp-standing-guard-front-door-evaluation-1c09844e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from standing-guard-service.lovable.app](https://www.zero.xyz/host/standing-guard-service.lovable.app/llms.txt)