Click on "Deploy Server".
Wait a few minutes for the server to deploy. Once ready, it will show a "Started" state.
In the chat, type @ followed by the MCP server name and your instructions, e.g., "@Semantic Code MCP Server Find the definition of 'calculateTotal' in src/utils.ts"
That's it! The server will respond to your query, and you can continue using it as needed.
Here is a step-by-step guide with screenshots.
This is a Model Context Protocol (MCP) server that provides semantic code analysis capabilities using the Language Server Protocol (LSP).
Semantic Navigation: Go to definition, find references, hover info.
Relationship Analysis: Check if function A calls function B (using LSP references).
Related MCP server: lsp-tools-mcp
This server acts as a bridge between MCP and LSP. It spawns a typescript-language-server instance and translates MCP tool calls into LSP JSON-RPC requests.
get_definition: Find where a symbol is defined.
get_references: Find all usages of a symbol.
search_in_file: Search for a string in a file to find its line and character position.
check_function_call: Analyze if one function calls another.
Clone the repository:
git clone git@github.com:thousandmiles/lsp-mcp-server.git
cd lsp-mcp-serverRun the setup script to build the project and generate the configuration:
./setup.shCopy the output JSON and paste it into your MCP client configuration file.
Install dependencies and build:
npm install
npm run buildConfigure your MCP client (e.g. Claude Desktop) to run this server:
{
"mcpServers": {
"semantic-code": {
"command": "node",
"args": ["/path/to/code_node/build/index.js"]
}
}
}Check if one function calls another (direct call). Analyzes if 'sourceFunction' (defined in sourceFile) contains any references to 'targetFunction' (defined in targetFile).
Inputs: sourceFile (required), targetFile (required), sourceFunction (required), targetFunction (required).
Get the definition location of a symbol. Returns the file path, line, and character where the symbol is defined. Tip: Use 'search_in_file' to find the exact line and character of the symbol you are interested in.
Inputs: line (required), filePath (required), character (required).
Find all references to a symbol. Returns a list of locations where the symbol is used. Tip: Use 'search_in_file' to find the exact line and character of the symbol definition or usage.
Inputs: line (required), filePath (required), character (required).
Search for a string in a file to find its line and character position. Useful for finding the arguments for get_definition.
Inputs: query (required), filePath (required).
Recent tool additions, removals, and schema changes observed during successful MCP inspections.
Loading tool schema changelog…
Scored across 4 tools
Tools are mostly distinct: get_definition, get_references, and search_in_file each serve clearly different lookup purposes, while check_function_call is a specialized relationship query. However, check_function_call could overlap conceptually with get_references since call relationships are a type of reference, though the descriptions provide enough clarity to avoid serious confusion.
All tool names use snake_case and follow a verb-first style, with get_definition and get_references matching the verb_noun pattern exactly. search_in_file and check_function_call deviate slightly by including prepositions or compound objects, but the overall pattern remains predictable and readable.
Four tools is well-scoped for a semantic code navigation server. Each tool provides a distinct, non-redundant capability without feeling sparse or overwhelming.
The set covers core symbol workflows: finding definitions, references, string locations, and direct call relationships. Missing features like finding implementations or broader call-graph traversal are reasonable omissions for a focused utility set, and agents can complete common navigation tasks without major dead ends.
Lean 4 MCP server: compile, prove theorems, and formalize math with Mathlib.
The official Svelte MCP server providing docs and autofixing tools for Svelte development
Repository knowledge graph MCP server for codebase understanding and debugging.
