> ## Documentation Index
> Fetch the complete documentation index at: https://docs.urantia.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# Urantia Papers API - Free REST API for Urantia Book Content

> Free, open REST API providing structured access to all 197 papers, 14,500+ paragraphs, full-text search, and audio narration of the Urantia Book.

The Urantia Papers API provides structured access to all 197 papers, 1,626 sections, and 14,500+ paragraphs of the Urantia Book — with full-text search and multi-voice audio narration.

## Quick links

<Columns cols={3}>
  <Card title="Quickstart" icon="rocket" href="/quickstart">
    Make your first API call in under a minute.
  </Card>

  <Card title="MCP Servers" icon="plug" href="/mcp-servers">
    Connect Claude, Cursor, or any AI agent — 19 tools, 2 resources, 2 prompts. One-click via Smithery.
  </Card>

  <Card title="Changelog" icon="clock" href="/changelog">
    Latest updates to the API, docs, and MCP servers.
  </Card>

  <Card title="API Reference" icon="terminal" href="/api-reference/introduction">
    Explore all endpoints with interactive examples.
  </Card>

  <Card title="Use Cases" icon="lightbulb" href="/use-cases">
    Ideas and code examples for what you can build.
  </Card>
</Columns>

## For AI agents

Connect the MCP server and the agent gets 19 tools for search, lookup, and cross-references. No key needed.

```
https://api.urantia.dev/mcp
```

* [Set up the MCP server](/mcp-servers) in Claude, Cursor, or another client
* [Agent guide](/ai-agents): the recommended flow from table of contents to search to context
* Listed on [Smithery](https://smithery.ai/servers/urantiahub/urantia-papers) and [Glama](https://glama.ai/mcp/connectors/dev.urantia/urantia-papers)
* [`llms.txt`](/llms.txt) for a plain-text summary of the API

## Base URL

```
https://api.urantia.dev
```

## Features

* **Full-text search** with ranked results across all paragraphs
* **Semantic search** using vector embeddings for meaning-based queries
* **MCP servers** at [`/mcp-servers`](/mcp-servers) — 19 tools + 2 resources + 2 prompts for Claude, Cursor, and other AI agents (one-click install via Smithery)
* **Function-calling schemas** at `/tools/openai` and `/tools/anthropic` — drop-in tool definitions for the OpenAI and Anthropic SDKs
* **Three paragraph ID formats** auto-detected from the reference string
* **4,400+ entities** — beings, places, orders, races, religions, concepts
* **Audio narration** with multiple TTS models and voices per paragraph
* **OpenAPI spec** at `/openapi.json` for client generation
* **No authentication required** — free and open

## Built with the API

<Columns cols={3}>
  <Card title="Interactive Demo" icon="play" href="https://demo.urantia.dev">
    Live examples: semantic search, random quotes, audio playback, entity exploration, and passage lookup.
  </Card>

  <Card title="UrantiaHub" icon="book-open" href="https://www.urantiahub.com">
    A reading site for the Papers. It gets its text from this API.
  </Card>

  <Card title="Dalamatia" icon="gamepad" href="https://dalamatia.urantiahub.com">
    A story game set in Paper 66. Every quoted paragraph comes from this API.
  </Card>
</Columns>

## Donate

<Card title="Help Keep This Project Free" icon="heart" href="/support">
  This API is free and open source. If it's useful to you, consider donating to keep the infrastructure running.
</Card>


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