# Tempest AI Compose Endpoint

> Tempest AI Compose Endpoint is a paid API for AI agents from trempest.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://trempest.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-compose-endpoint-c862937a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_vaOaUVBe6dFwSnEHPgpME

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-compose-endpoint-c862937a -d '<json body>'
```

Example prompt: Write me a medium-length blog post about the benefits of remote work, aimed at small business owners, using an encouraging and professional tone with a conversational style.

## When to prefer this

Choose this endpoint when you need to generate original written content from scratch with fine-grained control over tone, style, length, and audience — particularly for marketing copy, blog posts, product descriptions, or business writing where pay-per-call pricing is acceptable and USDC payment via x402 is available.

## Known failure modes

- Missing required 'prompt' field returns a validation error
- Invalid or unsupported tone/style values may produce unexpected output or error
- Insufficient USDC balance results in payment failure and no content returned
- Very vague or empty prompts may produce low-quality generic output
- Network timeout on the Vercel deployment may return a 504 with no content

## 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 composed text 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-compose-endpoint-c862937a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from trempest.vercel.app](https://www.zero.xyz/host/trempest.vercel.app/llms.txt)