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mcp-language-server

mcp-language-server is an MCP server, listed under developer tools. Its repository has 1,610 GitHub stars and is licensed under BSD-3-Clause; we last read it on 2026-10-22.

Provides semantic tools such as definition, references, rename, and diagnostics to MCP-enabled clients.

Install

Read from mcp-language-server’s own README, close to verbatim -- not written by us, and not guessed.

go install github.com/isaacphi/mcp-language-server@latest

What it reaches, and what it needs

Reaches
○ not recognised
Credential
○ none found

Maintenance

Stars
1610
State
listed
Licence
BSD-3-Clause
From the repository

mcp-language-server gives MCP enabled clients access semantic tools like get definition, references, rename, and diagnostics.

What mcp-language-server can do

6 tools documented in its README. An AI client calls these by name.

definition
Retrieves the complete source code definition of any symbol (function, type, constant, etc.) from your codebase.
references
Locates all usages and references of a symbol throughout the codebase.
diagnostics
Provides diagnostic information for a specific file, including warnings and errors.
hover
Display documentation, type hints, or other hover information for a given location.
rename_symbol
Rename a symbol across a project.
edit_file
Allows making multiple text edits to a file based on line numbers. Provides a more reliable and context-economical way to edit files compared to search and replace based edit tools.

Read from the README; names are kept only if the README contains them.

mcp-language-server compared with similar servers

mcp-language-server compared with the closest alternatives, by services reached, credentials, stars, last update and licence
ServerReachesNeedsStarsLast updateLicence
mcp-language-server (this page)—None listed1,6102026-03-01BSD-3-Clause
code-context-engine—None listed4352026-08-23MIT
agent-lspagentAGENT_LSP_TOKEN1632026-10-22MIT
maven-tools-mcp—None listed352026-10-04MIT
code-context-mcp—None listed262025-11-13MIT

Ranked by services in common with mcp-language-server, then by stars. Figures are from each repository when we last read it.

Common questions about mcp-language-server

What does mcp-language-server do?
Provides semantic tools such as definition, references, rename, and diagnostics to MCP-enabled clients.
How do I install mcp-language-server?
Its own README gives this command: go install github.com/isaacphi/mcp-language-server@latest. Run it where your MCP client can launch the server, and check the README for any settings it asks for.
Is mcp-language-server official and is it maintained?
We found nothing naming it as a vendor’s official server. Its repository has 1,610 GitHub stars and its state in our directory is listed. Its last commit we recorded was on 2026-03-01.
What licence does mcp-language-server use?
The repository declares the BSD-3-Clause licence.

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