Slingr MCP Server

This is an MCP (Model Context Protocol) server for the Slingr platform. It provides tools, resources, and prompts to interact with both the Slingr application structure (Builder) and its data (Runtime).

Features

• Documentation Search (RAG): Search through Slingr's official documentation using a local vector database (LanceDB) and local embeddings.

• Application Structure (Builder): List entities, get detailed metadata, manage permissions, and create new entities or fields.

• Data Management (Runtime): List, get, create, update, and delete records from any entity.

• Developer Tools: Check for pending metadata changes and review them before pushing.

• MCP Resources: Browse entities and documentation files as resources.

• MCP Prompts: Specialized prompts for entity modeling and script debugging.

Related MCP server: AppCan Helper MCP Server

Installation

1. Install dependencies:

   npm install

2. Configure environment variables in .env:

   SLINGR_API_URL=https://your-domain.slingrs.io/dev/builder/api
   SLINGR_EMAIL=your-email@example.com
   SLINGR_PASSWORD=your-password
   NOTE

   The server will automatically deduce theRuntime API URL by replacing /builder/api with /runtime/api in your SLINGR_API_URL. You can override this by setting SLINGR_RUNTIME_API_URL explicitly.

3. Build the project:

   npm run build

4. Ingest documentation (first time or when updated):

   # Using the standalone script
   npx tsx scripts/ingest-docs.ts

Usage

In Claude Desktop

Add this to your claude_desktop_config.json:

{
  "mcpServers": {
    "slingr": {
      "command": "node",
      "args": ["/path/to/slingr-mcp/build/index.js"],
      "env": {
        "SLINGR_API_URL": "https://your-domain.slingrs.io/dev/builder/api",
        "SLINGR_EMAIL": "your-email@example.com",
        "SLINGR_PASSWORD": "your-password"
      }
    }
  }
}

Tools

Application structure (Builder)

• check_connection: Verifies the API connection.

• list_entities: Lists all entities.

• get_entity: Gets detailed entity metadata (use verbose: true for full details).

• create_entity: Creates a new entity.

• create_field: Adds a field to an entity.

• list_groups: Lists security groups (roles).

• get_entity_permissions: Gets permissions for an entity (simplified output).

• update_entity_permissions: Updates permissions for a group.

• check_pending_changes: Checks for development changes.

• get_pending_changes: Lists changes ready to be pushed.

Data Management (Runtime)

• list_records: Fetches records from an entity.

• get_record: Fetches a specific record. Supports fields parameter for partial fetching.

• create_record: Creates a new record.

• update_record: Updates a record.

• delete_record: Deletes a record.

Other

• search_documentation: Searches the documentation.

• ingest_documentation: Updates the vector database.

Resources

• slingr://entities: Full list of entities in JSON format.

• slingr://docs/{path}: Access any documentation file as a resource.

Prompts

• create_entity_with_fields: Guide to modeling a new entity.

• debug_slingr_script: Help for debugging scripts using documentation context.