2b2tAtlas Public API MCP Server

2b2tAtlas Public API

Documentation and examples for the 2b2tAtlas public API: historical locations, groups, highways, Archive warps, world downloads, map renders, and Nocom observation aggregates.

Base URL: https://api.blackportal.cloud. Public reads require no API key. JSON responses support browser CORS.

• API reference
• Live OpenAPI schema
• Coordinates and render tiles
• BlueMap 3D views
• Nocom data
• MCP setup and tools
• Changelog
• Full Atlas stack source — UI, API, ingestion, collectors and rendering, with local setup and example configuration.

Requests

curl --fail "https://api.blackportal.cloud/api/locations"
curl --fail "https://api.blackportal.cloud/api/groups"
curl --fail "https://api.blackportal.cloud/api/renders?limit=10"
curl --fail "https://api.blackportal.cloud/api/nocom/highways?dimension=nether&direction=northeast"

List responses are JSON arrays. Warps, renders, and attachments accept limit and offset; the default limit is 500 and the maximum is 1,000. Locations return the complete catalog.

Examples

To run your own Atlas, see examples/atlas-stack. That folder is an Unlicense application snapshot. The smaller API clients below remain standalone examples for consuming the public service.

Run from the repository root:

dotnet run --project examples/csharp -- "Mu Megabase"
node examples/javascript/atlas-examples.mjs "Mu Megabase"
python examples/python/atlas_examples.py "Mu Megabase"
python examples/python/nocom_activity.py --dimension nether --direction northeast
python examples/python/location_media.py 1254

The C# example uses .NET 10. The JavaScript and Python examples use their standard libraries. Each defaults to the public API; set ATLAS_API_BASE_URL to use a local fixture or development server.

examples/requests.http contains REST Client requests. examples/fabric contains an asynchronous Java HTTP client and Minecraft client-thread handoff example; it is not a complete mod.

Endpoints

All routes below use GET. See the reference for response fields, filters, caching, and errors.

Client behavior

• Cache catalog responses and honor HTTP cache headers. In Minecraft clients, perform HTTP requests and image decoding outside the render/tick thread.
• Follow returned links such as apiUrl, canonicalUrl, worldDownloadUrl, and blueMapUrl. BlueMap links are optional and belong to a specific render.
• Handle null fields and ignore unknown JSON properties.
• Coordinates use the record's native dimension: 0 Overworld, 1 Nether, 2 End. Tile-template {y} is a tile row, not Minecraft elevation.
• WDLs are partial historical Java saves. Their metadata includes scope, provenance, size, and SHA-256; ZIP downloads support HTTP ranges.
• Historical coordinates and renders do not describe the current server state. Nocom observation counts are not unique-player counts.
• Retain source URLs, captions, attribution, and evidence fields when copying records so the original material can be checked.

MCP

Endpoint: https://api.blackportal.cloud/mcp. Transport: Streamable HTTP. The server is stateless and read-only, with no authentication required.

The MCP guide includes client configuration, the 18 tools, and resource URIs. The registry name is io.github.bobymicjohn/2b2t-atlas; its manifest is server.json.

Bulk data

Static exports are hosted on 2b2tatlas.com:

Use these exports for bulk imports. Keep entity IDs and canonical URLs with imported records. The WDL catalog also has an HTML view.

Existing integration

XaeroTools supports an optional Atlas location overlay with source links and local copies of Atlas map imagery.

Contributing

See CONTRIBUTING.md for example checks and pull requests. Report documentation errors and broken examples through issues.

License

Atlas-authored code, documentation and the full stack are released under the Unlicense. Use, modify and share them however you like; no permission or Atlas attribution is required. The same goes for Atlas's factual catalog. ATTRIBUTION.md has optional credit formats; NOTICE.md covers third-party media and source terms.

2b2tAtlas is not affiliated with Mojang Studios, Microsoft, or the operators of 2b2t.