# Inkbox AI Correspondence Writer

> Inkbox AI Correspondence Writer is a paid API for AI agents from inkonbox.netlify.app, paid per call via x402, $0.15/call, status unknown (last checked 2026-09-15).

Drafts AI-generated correspondence (letters, emails, messages) given a purpose and optional tone

## Facts

- Endpoint: POST https://inkonbox.netlify.app/api/correspondence
- Price: $0.15/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/inkbox-ai-correspondence-writer-191b4358
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_vvwsfOGaEiECItLcBX_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 inkbox-ai-correspondence-writer-191b4358 -d '<json body>'
```

Example prompt: Write me a professional but warm correspondence to my landlord explaining that I'll be late on this month's rent payment and asking for a two-week extension — keep the tone apologetic but confident.

## When to prefer this

Use this endpoint when you need to generate a complete piece of correspondence — a letter, email, or message — from a stated purpose and optional tone. Prefer it over generic text generation when correspondence structure and appropriate formality are important. Best for single-call, on-demand drafting rather than bulk content pipelines.

## Known failure modes

- Missing required 'purpose' field returns validation error
- Vague or ambiguous purpose may produce generic or off-target correspondence
- Payment failure (x402) prevents access to the endpoint
- Unexpected tone values may be ignored or cause errors
- Rate limiting or service unavailability on the Netlify-hosted backend

## How this service works

Draft, rewrite, translate, and optimize written content. 25 AI-powered endpoints. Pay-per-call with USDC on Base.

## Output

Returns a structured response with a success flag and a data object containing the AI-generated correspondence text tailored to the specified purpose and tone.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "purpose"
 ],
 "properties": {
  "tone": {
   "type": "string"
  },
  "purpose": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "data": {
   "type": "object"
  },
  "success": {
   "type": "boolean"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/inkbox-ai-correspondence-writer-191b4358/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from inkonbox.netlify.app](https://www.zero.xyz/host/inkonbox.netlify.app/llms.txt)