# Inkbox AI Correspondence Generator

> Inkbox AI Correspondence Generator is a paid API for AI agents from 0ink.netlify.app, paid per call via x402, $0.15/call, status unknown (last checked 2026-09-14).

Generates AI-drafted correspondence (letters, emails, messages) given a stated purpose and optional tone

## Facts

- Endpoint: POST https://0ink.netlify.app/api/correspondence
- Price: $0.15/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/inkbox-ai-correspondence-generator-d3bd4db1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_0buFb8PhlZq5HthAyN6gQ

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-generator-d3bd4db1 -d '<json body>'
```

Example prompt: Draft a professional but warm correspondence for me — the purpose is to follow up with a client after a missed deadline and reassure them the project is back on track, use an apologetic yet confident tone.

## When to prefer this

Choose this endpoint when you need to programmatically generate structured correspondence (emails, letters, messages) at scale or on demand, especially when tone control is important. Prefer it over generic LLM calls when you want a pay-per-call, no-subscription model with USDC micropayments via x402 on Base.

## Known failure modes

- Missing required 'purpose' field returns a 400 validation error
- Payment not included or insufficient USDC triggers a 402 Payment Required response
- Vague or extremely short purpose may yield generic or low-quality output
- Service unavailability on Netlify hosting may return 503 errors
- Unsupported tone values may be silently ignored or cause unexpected output style

## 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 JSON object with a success boolean 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-generator-d3bd4db1/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from 0ink.netlify.app](https://www.zero.xyz/host/0ink.netlify.app/llms.txt)