CDN & Static Assets

All static data that powers the API is available directly from a public Cloudflare R2 bucket at cdn.urantia.dev. This includes the audio files. You can use these files for offline apps, custom pipelines, or self-hosted setups.

Audio moved from the old audio.urantia.dev subdomain to cdn.urantia.dev/audio/.... The old host is frozen and serves only part of the library. Update any saved URLs to the patterns below.

What’s available

Asset	Format	Count	Description
Papers	JSON	197	Full paper text with paragraphs, sections, and metadata
Paper audio	MP3	197	Full narration of each paper
Paragraph audio	MP3	16,000+	Individual paragraph narration across 7 voices
Paper videos	MP4	197	Full paper narration with synced text overlay (1080p)
Video thumbnails	PNG	197	Paper title cards for video thumbnails
Entities	JSON	3,000+	Typed entities (beings, places, concepts) with descriptions
Entity links	JSON	50,000+	Paragraph-to-entity citation mappings
Embeddings	JSON	14,500+	OpenAI `text-embedding-3-small` vectors (1536-dimensional)
Audio manifest	JSON	1	Complete inventory mapping paragraph IDs to audio URLs

URL patterns

Audio files

Paragraph-level audio follows this naming pattern:

https://cdn.urantia.dev/audio/eng/paragraphs/{voice}/{model}-{voice}-{globalId}.mp3

Examples:

# tts-1-hd model, nova voice, paragraph 0:0.0.1 (Foreword, first paragraph)
https://cdn.urantia.dev/audio/eng/paragraphs/nova/tts-1-hd-nova-0:0.0.1.mp3

# gpt-4o-mini-tts model, cedar voice, same paragraph
https://cdn.urantia.dev/audio/eng/paragraphs/cedar/gpt-4o-mini-tts-cedar-0:0.0.1.mp3

# Whole paper audio (Paper 1). Use 0 for the Foreword
https://cdn.urantia.dev/audio/eng/papers/1.mp3

# Part-level audio
https://cdn.urantia.dev/audio/eng/parts/tts-1-hd-nova-Part1.mp3

Only nova covers every paragraph. For any other voice, read the audio object on the paragraph instead of building a URL, because a missing voice returns a 404. Available voices:

Model	Voices	Coverage
`tts-1-hd`	`nova`	Full
`gpt-4o-mini-tts`	`cedar`	Partial
`tts-1-hd`	`onyx`	Partial
`tts-1-hd`	`echo`, `alloy`, `fable`, `shimmer`	Samples only
`tts-1`	`alloy`	Samples only

Video files

Paper-level videos with narrated audio and synced text overlay:

# Paper 1 video (H.264 MP4, 1080p, 30fps)
https://video.urantiahub.com/tts-1-hd-nova-1.mp4

# Paper 1 thumbnail (PNG, 1920x1080)
https://video.urantiahub.com/thumbnail-1.png

All 197 papers have videos with the nova voice. Videos include animated background, paragraph text fading in/out, section title cards, and intro/outro branding.

JSON files

Paper JSON files are numbered 000.json through 196.json:

# Foreword
https://cdn.urantia.dev/json/eng/000.json

# Paper 1 — The Universal Father
https://cdn.urantia.dev/json/eng/001.json

# Paper index (all papers, sections, paragraphs)
https://cdn.urantia.dev/json/eng/index.json

# Part metadata
https://cdn.urantia.dev/json/eng/1-part.json

Entities

# All entities with descriptions, aliases, and types
https://cdn.urantia.dev/entities/seed-entities.json

# Paragraph-to-entity citation mappings
https://cdn.urantia.dev/entities/paragraph-entities.json

Embeddings

# All paragraph embeddings (OpenAI text-embedding-3-small, 1536 dimensions)
https://cdn.urantia.dev/embeddings/embeddings.json

The embeddings file is ~455 MB. Only download it if you need vector search capabilities for a self-hosted setup.

Audio manifest

# Complete mapping of paragraph IDs to audio CDN URLs
https://cdn.urantia.dev/manifests/audio-manifest.json

Paper JSON structure

Each paper file contains the full text with structured metadata:

{
  "paperId": "1",
  "paperTitle": "The Universal Father",
  "partId": "1",
  "sections": [
    {
      "sectionId": "0",
      "sectionTitle": "",
      "paragraphs": [
        {
          "globalId": "1:1.0.1",
          "standardReferenceId": "1:0.1",
          "paperSectionParagraphId": "1.0.1",
          "text": "THE Universal Father is the God of all creation...",
          "htmlText": "<p>THE Universal Father is the God of all creation...</p>"
        }
      ]
    }
  ]
}

Use cases

Offline apps — Download the JSON files and audio for offline reading and listening
Custom search — Use the embeddings to build your own vector search
Self-hosted API — Seed your own database from the source JSON and entities
Data analysis — Analyze entity relationships, citation patterns, or text embeddings
Alternative TTS — Use the text data to generate audio with other TTS providers

For most use cases, the API is easier than working with raw files. Use the CDN when you need bulk access or offline capabilities.

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What’s available

URL patterns

Audio files

Video files

JSON files

Entities

Embeddings

Audio manifest

Paper JSON structure

Use cases

​What’s available

​URL patterns

​Audio files

​Video files

​JSON files

​Entities

​Embeddings

​Audio manifest

​Paper JSON structure

​Use cases

What’s available

URL patterns

Audio files

Video files

JSON files

Entities

Embeddings

Audio manifest

Paper JSON structure

Use cases