MRX Public MCP server

MRX Public MCP

Bring MineralRightsXchange.com public mineral-rights guides into your MCP-compatible assistant. Find relevant guides, read their current content with canonical citations, and understand the next step toward a human review.

No MRX account or API key. Read-only. No customer records.

Official MCP Registry: io.github.underwriter-MRX/mrx-mcp. Published and verified September 23, 2026.

Connect to the hosted MCP

Endpoint: https://mrx-public-mcp.vercel.app/mcp

Use Streamable HTTP in a client that supports remote MCP servers. This public read-only endpoint does not require an MRX account or API key. A first connection after an instance restart can take tens of seconds while the public index is verified; retry an explicit warming/incomplete-index response. Local stdio installation remains available below.

This endpoint is usable by compatible clients, but is not a published ChatGPT app-directory listing. Account features, custom-app permissions and OpenAI review are separate requirements. See the submission packet.

Start locally in a few minutes

Requires Python 3.10+ and uv or Python's pip. Your assistant must support local stdio MCP servers. Remote Streamable HTTP is also supported; see deployment instructions. A deployed endpoint is a separate operational requirement.

Install the versioned source:

uv tool install 'git+https://github.com/underwriter-MRX/mrx-mcp.git@v0.2.0'

For clients that accept mcpServers JSON (such as Claude Desktop), add this entry to the client's MCP configuration, then restart it:

{
  "mcpServers": {
    "mrx-public": {
      "command": "uvx",
      "args": ["--from", "git+https://github.com/underwriter-MRX/mrx-mcp.git@v0.2.0", "mrx-mcp"]
    }
  }
}

If your desktop app cannot find uvx, use its absolute installed path. Windows may require uvx.exe. Clients use different configuration wrappers; the portable command is uvx with the arguments above. For a Python-only setup, install the same version with python -m pip install 'git+https://github.com/underwriter-MRX/mrx-mcp.git@v0.2.0' and configure the installed mrx-mcp executable.

Start with “Use MRX to find guides about inherited mineral rights. Read the best matches and cite the original pages.”

What you can do

The server also supplies an mrx://about resource and a researchmineralrights prompt. Search uses full-text BM25 ranking, title/heading boosts and explicit word aliases. It does not call an external AI or embedding API. State/topic labels are inferred mentions, not verified legal applicability. Read pages before relying on their claims.

Standard search(query) and fetch(id) tools provide typed, canonical-URL citation responses for compatible ChatGPT research integrations. The original MRX tools remain available. Standard search fails explicitly on incomplete corpus coverage; mrxsearchguides reports coverage and excerpts. A cold index warms in bounded batches; repeat after an incomplete response. Retrieved source dates and authors are reported only when published, with provenance; fetching content does not establish professional review.

Try these prompts:

Shortened. The full README is on GitHub.