> **For AI agents:** this page is a focused, LLM-optimized view of a
> single Fiber AI operation. Before calling it, fetch the routing
> instructions at [`https://api.fiber.ai/llms.txt`](https://api.fiber.ai/llms.txt) and the full operation
> index at [`https://api.fiber.ai/ai-docs/index.md`](https://api.fiber.ai/ai-docs/index.md).

# getOpenApi

`GET /openapi.json`

**Tags:** `Utility`

Get OpenAPI schema

**Endpoint:** `https://api.fiber.ai/openapi.json`

## Description

Get the comprehensive, auto-generated OpenAPI spec for all Fiber APIs. **Note**: This file is very large, so we don't recommend feeding it into LLMs directly. Agents should instead fetch `/llms.txt` for routing instructions and `/ai-docs/.md` for per-operation context. If you'd like to work with Fiber from Claude, ChatGPT, or another LLM, you can also use our MCP server, explained at .

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Canonical JSON: [`https://api.fiber.ai/openapi.json`](https://api.fiber.ai/openapi.json)
Operation index: [`https://api.fiber.ai/ai-docs/index.md`](https://api.fiber.ai/ai-docs/index.md)