# fastapi.online — User Story Generator

> fastapi.online — User Story Generator is a paid API for AI agents from api.fastapi.online, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).

Generates an agile user story from a plain-text feature description

## Facts

- Endpoint: POST https://api.fastapi.online/user-story-generate
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/fastapi-online-user-story-generator-8a5721c5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_9LZE3B6juaN3UH4t0iH29

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-user-story-generator-8a5721c5 -d '<json body>'
```

Example prompt: Generate an agile user story for this feature: users should be able to reset their password via email link without contacting support.

## When to prefer this

Choose this endpoint when you need to quickly convert a plain-language feature requirement into a formatted agile user story without any signup or subscription — paying only $0.001 USDC per call. Ideal for automation pipelines that process product backlogs, for teams generating stories in bulk from requirements documents, or for agents assisting product managers in sprint planning.

## Known failure modes

- Empty or too-short feature_description triggers validation error (minLength:1)
- Feature description exceeding 2000 characters rejected
- Vague or ambiguous input may produce a generic or low-quality user story
- Payment failure via x402 protocol returns 402 Payment Required
- Model unavailability or server error returns 5xx response

## 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 formatted agile user story, typically following the 'As a [user], I want [goal] so that [benefit]' structure, derived from the provided feature description.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "feature_description": {
   "type": "string",
   "maxLength": 2000,
   "minLength": 1
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/fastapi-online-user-story-generator-8a5721c5/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)