cfabric-mcp 0.1.6

MCP server for Context Fabric corpus operations

Context-Fabric MCP Server

Query Context-Fabric corpora via MCP (Model Context Protocol).

Installation

pip install cfabric-mcp

Transports

The server supports three transport modes:

Transport	Flag	Use Case
stdio	(default)	Claude Desktop, local MCP clients
SSE	--sse PORT	Cursor, remote MCP clients
Streamable HTTP	--http PORT	Production deployments

Usage

# stdio transport (Claude Desktop)
cfabric-mcp --corpus /path/to/bhsa

# SSE transport (Cursor, remote clients)
cfabric-mcp --corpus /path/to/bhsa --sse 8000

# Streamable HTTP transport (production)
cfabric-mcp --corpus /path/to/bhsa --http 8000

Options

--corpus PATH              # Corpus to load (required, repeatable)
--corpus name=PATH         # Named corpus
--sse PORT                 # SSE transport on port (endpoint: /sse)
--http PORT                # Streamable HTTP transport on port (endpoint: /mcp)
--host HOST                # Host to bind (default: 0.0.0.0)
--features "sp lex"        # Load only specific features
--verbose                  # Debug logging

Tools

The server exposes 11 MCP tools organized in layers for efficient discovery.

Note: A usage guide is automatically provided to clients via the MCP instructions field at connection time.

Discovery Tools

Tool	Description
list_corpora	List loaded corpora
describe_corpus	Get corpus structure (node types, sections)
list_features	Browse features with optional node_type filter
describe_feature	Get feature details with sample values
get_text_formats	Get text encoding samples (cached)

Search Tools

Tool	Description
search	Pattern search (results/count/statistics/passages)
search_continue	Paginate search results
search_csv	Export results to CSV file (stdio only)
search_syntax_guide	Search syntax docs (section-based)

Data Access Tools

Tool	Description
get_passages	Get text by section references
get_node_features	Get feature values for nodes

Discovery Flow

The tools are designed for hierarchical, iterative discovery:

describe_corpus()
│
├─► list_features()                  → Browse all features
│       └─► describe_feature("sp")   → Full details + samples
│
├─► list_features(node_types=["word"])  → Filter by node type
│       └─► describe_feature(...)
│
└─► get_text_formats()               → When encoding matters

        ↓
    search()  → Execute queries

Typical workflow:

1. describe_corpus() - Get structure overview
2. list_features() or list_features(node_types=["word"]) - Browse available features
3. describe_feature("sp") - Deep dive into specific feature with sample values
4. search_syntax_guide() - Get search syntax help (section-based)
5. search() - Execute search queries

Search Return Types

Type	Description
results	Paginated node info with cursor (default)
count	Total count only
statistics	Feature value distributions
passages	Formatted text passages

Client Configuration

Claude Desktop (stdio)

Add to ~/Library/Application Support/Claude/claude_desktop_config.json:

{
  "mcpServers": {
    "context-fabric": {
      "command": "/path/to/venv/bin/cfabric-mcp",
      "args": ["--corpus", "/path/to/bhsa"]
    }
  }
}

Cursor (SSE)

Start server:

cfabric-mcp --corpus /path/to/bhsa --sse 8000

Configure Cursor to connect to: http://localhost:8000/sse

Custom MCP Clients

For SSE transport, connect to http://host:port/sse For Streamable HTTP, connect to http://host:port/mcp

License

MIT