# fastapi.online FAQ Answer Generator

> fastapi.online FAQ Answer Generator is a paid API for AI agents from api.fastapi.online, paid per call via x402, $0.001/call, status down (last checked 2026-09-15).

Generates a direct answer to a question given a provided context passage, using self-hosted AI inference.

## Facts

- Endpoint: POST https://api.fastapi.online/faq-answer-generate
- Price: $0.001/call
- Payment: x402
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/fastapi-online-faq-answer-generator-70eb483e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap__DN8-8GO6Hh_HRCiwwHNp

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 fastapi-online-faq-answer-generator-70eb483e -d '<json body>'
```

Example prompt: Given this product manual section — 'The device automatically powers off after 10 minutes of inactivity to conserve battery' — answer the question: 'How long before the device turns off on its own?'

## When to prefer this

Choose this endpoint when you need a lightweight, pay-per-call FAQ answer generation capability without signup overhead. It is well-suited for agents that already extract relevant context chunks and need a fast answer synthesis step, or for building self-hosted-style Q&A pipelines without relying on large commercial LLM APIs. At $0.001 USDC per call it is cost-effective for high-volume FAQ automation tasks.

## Known failure modes

- Empty or too-short context/question returns a 400 validation error
- Context exceeding 4000 characters or question exceeding 1000 characters is rejected
- If the context does not contain enough information to answer the question, the model may return a vague or hallucinated response
- Payment failure or insufficient USDC balance results in a 402 Payment Required response
- Model inference timeout may occur for very complex or long context passages

## How this service works

Chat, embeddings, OCR, speech-to-text, image editing, image understanding (captioning/Q&amp;A), text-to-speech, translation, writing tools, classification tools, developer tools, local utilities, format/checksum validators, encoding &amp; crypto utilities, date/time calculators, geo/coordinate math, math &amp; finance calculators, novelty tools, and business/social writing generators — 179 endpoints in all, across multiple specialized self-hosted models. Pay per call with crypto — no signup — or get an API key.

## Output

A natural language answer generated from the provided context, directly responding to the question. The response is a text string synthesized by the self-hosted AI model based solely on the supplied context passage.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "context": {
   "type": "string",
   "maxLength": 4000,
   "minLength": 1
  },
  "question": {
   "type": "string",
   "maxLength": 1000,
   "minLength": 1
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/fastapi-online-faq-answer-generator-70eb483e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.fastapi.online](https://www.zero.xyz/host/api.fastapi.online/llms.txt)