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3GPP MCP Server

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3GPP MCP Server

MCP server that exposes 3GPP Release 18 OpenAPI specifications as tools for AI assistants. Built on the 5GC_APIs spec collection.

Tools

Tool

Description

list_specs

List available specs, optionally filtered by keyword

list_specs_by_nf

Group specs by Network Function (AMF, SMF, UDM, etc.)

get_spec_info

Get metadata (title, version, servers) for a spec

get_paths

List all API endpoints in a spec

get_endpoint

Get raw endpoint details ($ref unresolved)

get_endpoint_resolved

Get endpoint with all $refs recursively inlined

list_schemas

List all schema names in a spec

get_schema

Get raw schema definition ($ref unresolved)

get_schema_resolved

Get schema with all $refs recursively inlined

search_specs

Full-text search across all specs (set deep=True for property/enum search)

search_schema_properties

Find all schemas containing a specific field name

find_references

Find cross-spec $ref dependencies

resolve_ref

Resolve a single $ref within or across specs

Related MCP server: OpenAPI MCP Server

Setup

python -m venv .venv
source .venv/bin/activate
pip install -r requirements.txt

Usage

Claude Code

Add to your .mcp.json:

{
  "mcpServers": {
    "3gpp-specs": {
      "command": "/path/to/.venv/bin/python",
      "args": ["/path/to/server.py"]
    }
  }
}

Standalone

python server.py

Testing

source .venv/bin/activate
python test_server.py           # run test suite
python test_server.py --verbose # include output previews

Runs 43 test cases across all 13 tools covering correctness, error handling, and performance. Reports pass/warn/fail with timing breakdown and cold vs warm cache comparison.

Specs

The YAML files are 3GPP Release 18 OpenAPI specifications sourced from jdegre/5GC_APIs.

This server cannot be deployed

One endpoint for every MCP toolRayrun runs every MCP server behind one URL and holds the credentials. Each call is decided per client, tool, and argument, then recorded.ray.runAd

Maintenance

ActivityInactive
ResponsivenessNo issues

Resources

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