# Tempest AI Content Engine — Compose

> Tempest AI Content Engine — Compose is a paid API for AI agents from tempest-2zzx.vercel.app, paid per call via x402, $0.3/call, status unknown (last checked 2026-09-14).

Generates original written content from a prompt with configurable tone, style, length, and target audience

## Facts

- Endpoint: POST https://tempest-2zzx.vercel.app/api/compose
- Price: $0.3/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/tempest-ai-content-engine-compose-51e17bd0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_1m1SMrqBrerBHpZuvPltE

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 tempest-ai-content-engine-compose-51e17bd0 -d '<json body>'
```

Example prompt: Can you write a medium-length blog post about the benefits of remote work, aimed at small business owners, in an encouraging and conversational tone?

## When to prefer this

Choose this endpoint when you need to generate original written content from scratch with precise control over tone, style, length, and audience — especially in agent workflows that pay per call via USDC on the x402 protocol. It is preferable over generic LLM APIs when you want a structured, pay-per-use content generation service without managing your own model infrastructure.

## Known failure modes

- Missing required 'prompt' field returns a validation error
- Insufficient USDC balance or failed x402 payment results in 402 Payment Required
- Overly long or complex prompts may produce truncated or lower-quality output
- Invalid or unrecognized tone/style/length values may be ignored or default to neutral
- Vercel cold-start latency may cause occasional timeouts on first request

## How this service works

Compose, rewrite, translate, and refine content at scale. 25 AI-powered endpoints. Pay-per-call with USDC on Tempo.

## Output

Returns a JSON object with a success boolean and a data object containing the AI-generated text content based on the provided prompt, tone, style, length, and audience parameters.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "prompt"
 ],
 "properties": {
  "tone": {
   "type": "string",
   "description": "Tone"
  },
  "style": {
   "type": "string",
   "description": "Writing style"
  },
  "length": {
   "type": "string",
   "description": "Desired length: short, medium, long"
  },
  "prompt": {
   "type": "string",
   "description": "The writing prompt"
  },
  "audience": {
   "type": "string",
   "description": "Target audience"
  }
 }
}
```

## 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/tempest-ai-content-engine-compose-51e17bd0/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from tempest-2zzx.vercel.app](https://www.zero.xyz/host/tempest-2zzx.vercel.app/llms.txt)