# fastapi.online — AI-Powered Changelog Generator

> fastapi.online — AI-Powered Changelog Generator is a paid API for AI agents from api.fastapi.online, paid per call via x402, $0.0015/call, status unknown (last checked 2026-09-14).

Generates a formatted changelog from a list of git commits using a self-hosted AI model, with optional style control.

## Facts

- Endpoint: POST https://api.fastapi.online/changelog-generate
- Price: $0.0015/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-ai-powered-changelog-generator-00ad454b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_MT7oHzQ5x3DBB9gNj6zA8

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-ai-powered-changelog-generator-00ad454b -d '<json body>'
```

Example prompt: Take these git commit messages and generate a professional changelog from them in a 'keepachangelog' style: 'fix: resolve null pointer in auth module, feat: add OAuth2 login support, chore: bump dependencies, refactor: extract validation logic'.

## When to prefer this

Choose this endpoint when you need to automatically generate a changelog or release notes from raw git commit messages without setting up a local tool or CI pipeline integration. It's especially useful in agentic workflows that automate release documentation, or when you want AI-curated summarization rather than mechanical commit-list formatting. Prefer it over generic LLM prompts when you want a pay-per-call, no-signup solution with consistent changelog-oriented output.

## Known failure modes

- Empty or missing commits field returns a validation error (minLength:1 enforced)
- Commits text exceeding 20,000 characters will be rejected
- Invalid or unrecognized style value may produce unexpected formatting
- Payment failure via x402 results in 402 response before processing begins
- Garbled or non-standard commit messages may produce low-quality or incoherent output
- Model inference timeout may occur for very large commit logs

## 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

Returns a formatted changelog document as text, derived from the provided commit messages. The output is a structured, human-readable changelog suitable for release notes, GitHub releases, or documentation — organized and summarized by an AI model according to the requested style.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "style": {
   "type": "string",
   "maxLength": 40
  },
  "commits": {
   "type": "string",
   "maxLength": 20000,
   "minLength": 1
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/fastapi-online-ai-powered-changelog-generator-00ad454b/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)