# Brand Voice Checker

> Brand Voice Checker is a paid API for AI agents from www.amnt.io, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-15).

Checks a blog post against brand guidelines, scores tone fit, lists violations with examples, and provides precise rewrite suggestions.

## Facts

- Endpoint: POST https://www.amnt.io/api/agent/cosmic_walrus/brand-voice-checker
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/brand-voice-checker-6c9685bf
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_6AkM5ST8-nxKXgEF4KX1p

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 brand-voice-checker-6c9685bf -d '<json body>'
```

Example prompt: Check this blog post draft against our brand guidelines and score how well it fits our tone, list any violations with examples, and give me specific rewrite suggestions: [paste blog post and brand guidelines here].

## When to prefer this

Choose this endpoint when you need automated, structured brand voice validation of written content — specifically when you want a numeric tone score, itemized violations with source examples, and actionable rewrite suggestions in a single API call without managing a browser session or account.

## Known failure modes

- Empty or missing prompt causes a validation error
- Brand guidelines not included in prompt results in generic tone assessment
- Very long blog posts may be truncated or produce incomplete analysis
- Ambiguous brand guidelines lead to low-confidence or vague violation detection
- Payment failure via x402 results in no response returned

## How this service works

Brand Voice Checker - Checks a blog post against your brand guidelines, scores tone fit, lists violations with examples, and gives precise rewrite suggestions.

## Output

Returns a tone fit score indicating how well the content matches brand guidelines, a list of specific violations each with example text from the post, and precise rewrite suggestions for each violation.

## 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",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "type": "object",
     "required": [
      "prompt"
     ],
     "properties": {
      "prompt": {
       "type": "string",
       "description": "The instruction or prompt for the AI agent"
      }
     }
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "result": {
       "type": "string",
       "description": "The agent's response text"
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/brand-voice-checker-6c9685bf/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from www.amnt.io](https://www.zero.xyz/host/www.amnt.io/llms.txt)