# Combify Compute Chat (Text Q&A & Summarization)

> Combify Compute Chat (Text Q&A & Summarization) is a paid API for AI agents from compute.combify.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-10).

Answers questions, summarizes text, and generates short-form written content from a text prompt using Llama 3.1 8B Instruct for $0.01 USDC per call.

## Facts

- Endpoint: POST https://compute.combify.app/chat?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-10
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/combify-compute-chat-text-q-a-summarization-8727fc0c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_6szhL3JyWDsDKS5y0Pd1v

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 combify-compute-chat-text-q-a-summarization-8727fc0c -d '<json body>'
```

Example prompt: Summarize the following meeting notes into three bullet points and keep the output under 150 tokens: 'We discussed Q3 roadmap priorities, agreed to delay the mobile launch by two weeks, and assigned Sarah to lead the redesign effort.'

## When to prefer this

Choose this endpoint when your input is plain text and you need question answering, summarization, or short-form generation. Use /transcribe instead if your input is audio, or /caption if your input is an image. This endpoint is optimized for text-in, text-out tasks at a low fixed cost of $0.01 USDC per call, making it ideal for high-frequency lightweight inference tasks where you already have the text content ready.

## Known failure modes

- 402 Payment Required — call was made without a valid x402 payment; retry with correct USDC payment
- prompt exceeds 2000 characters — request will be rejected
- max_tokens out of range (must be 1–512) — validation error
- model timeout or internal error — transient 5xx; retry
- empty or missing prompt field — request rejected with validation error

## How this service works

General question answering, summarization, and short-form generation for TEXT input (Llama 3.1 8B instruct), fixed price $0.01 USDC. Use this when you already have text; use /transcribe for audio and /caption for images. POST JSON body {prompt (required, max 2000 chars), max_tokens (optional 1-512, default 256)}. Returns {text}. Unpaid calls get 402; paid calls settle only on success.

## Output

Returns a JSON object with a single 'text' field containing the model's generated response, up to the requested max_tokens (default 256, max 512). The response reflects direct output from Llama 3.1 8B Instruct based on the supplied prompt.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "prompt": {
   "type": "string",
   "description": "User prompt, max 2000 chars"
  },
  "max_tokens": {
   "type": "integer",
   "description": "Max output tokens, 1 to 512"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/combify-compute-chat-text-q-a-summarization-8727fc0c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from compute.combify.app](https://www.zero.xyz/host/compute.combify.app/llms.txt)