# Tempest AI Content Engine — Group Classification

> Tempest AI Content Engine — Group Classification is a paid API for AI agents from tumpest.vercel.app, paid per call via x402, $0.15/call, status unknown (last checked 2026-09-13).

Classifies text into user-defined categories using AI-powered multi-label or single-label grouping

## Facts

- Endpoint: POST https://tumpest.vercel.app/api/group
- Price: $0.15/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/tempest-ai-content-engine-group-classification-ea3fe53d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_pLNa9UZEEun41ghA8C3Lf

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-group-classification-ea3fe53d -d '<json body>'
```

Example prompt: Classify this customer support message into one of these categories — Billing, Technical Issue, Feature Request, or General Inquiry — using Tempest: 'My invoice shows double the amount charged this month and I can't find a way to dispute it.'

## When to prefer this

Use this endpoint when you need to classify arbitrary text into a custom set of categories on a pay-per-call basis without setting up or training your own model. It is well-suited for dynamic category sets that change per request and for low-volume, ad-hoc classification tasks where a hosted ML pipeline would be overkill.

## Known failure modes

- Missing required 'text' field returns a 400 validation error
- Empty or malformed 'categories' array may result in undefined classification behavior
- Payment failure (402) if USDC balance is insufficient or x402 payment header is missing
- Very long text inputs may exceed token limits and return a processing error
- Ambiguous or overlapping categories may produce low-confidence or unexpected groupings

## 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 classification result, including the assigned category and any supporting metadata from the AI model.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "text"
 ],
 "properties": {
  "task": {
   "type": "string",
   "description": "Classification task"
  },
  "text": {
   "type": "string",
   "description": "Text to classify"
  },
  "categories": {
   "type": "array",
   "description": "Categories"
  }
 }
}
```

## 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-group-classification-ea3fe53d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from tumpest.vercel.app](https://www.zero.xyz/host/tumpest.vercel.app/llms.txt)