agent-lsp

MCP server for language intelligence. Give AI agents structured access to language servers: go-to-definition, find-all-references, rename, diagnostics, completions, call hierarchy, and speculative execution.

66 tools. 23 agent workflows. 30 CI-verified languages. Single Go binary.

Why

AI coding agents navigate code with grep and file reads. This wastes 5-34x more tokens than necessary and produces 92-99% false positives on symbol lookups. Language servers already have the answers; agent-lsp makes them accessible via MCP.

Install

pip install agent-lsp

Or via other channels:

brew install blackwell-systems/tap/agent-lsp    # macOS/Linux
npm install -g @blackwell-systems/agent-lsp     # npm
curl -fsSL https://raw.githubusercontent.com/blackwell-systems/agent-lsp/main/install.sh | sh

Usage

# Start with auto-detection
agent-lsp

# Explicit language server
agent-lsp go:gopls typescript:typescript-language-server,--stdio

# HTTP mode
agent-lsp --http --port 8080 go:gopls

Then configure your AI tool's MCP settings to point at agent-lsp.

What it does

66 tools covering navigation, analysis, refactoring, diagnostics, formatting, speculative execution, composite exploration, safe editing, build, test, and more
23 agent workflows (skills) that encode correct multi-step operations: rename safely, analyze blast radius, simulate edits before applying
30 CI-verified languages: Go, Python, TypeScript, Rust, Java, C, C++, C#, Ruby, PHP, Kotlin, Swift, Scala, Zig, Lua, Elixir, Gleam, and more
Speculative execution: preview edits in memory, see what breaks before touching disk
Phase enforcement: blocks out-of-order operations so agents follow correct workflows

Token savings

Measured across 5 codebases (Go, TypeScript, Python):

Codebase	Lines	Savings
agent-lsp	15K	5x
Hono (TypeScript)	24K	13x
FastAPI (Python)	33K	2x
Next.js (TypeScript)	196K	5x
HashiCorp Consul (Go)	319K	34x

Full experiment: agent-lsp.com/token-savings

Works with

Claude Code, Cursor, Windsurf, GitHub Copilot, and any MCP-compatible client.

Release files for agent-lsp 0.20.0

For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.

Built distributions (wheels)

Table of built distributions (wheels) for agent-lsp 0.20.0
File	Interpreter	ABI	Platform	Reset
agent_lsp-0.20.0-py3-none-win_arm64.whl 10.8 MB Sep 26, 2026	Python 3	none	Windows ARM64	Details
agent_lsp-0.20.0-py3-none-win_amd64.whl 6.0 MB Sep 26, 2026	Python 3	none	Windows x86-64	Details
agent_lsp-0.20.0-py3-none-manylinux2014_x86_64.whl 12.0 MB Sep 26, 2026	Python 3	none	Linux glibc 2.17+ x86-64	Details
agent_lsp-0.20.0-py3-none-manylinux2014_aarch64.whl 11.4 MB Sep 26, 2026	Python 3	none	Linux glibc 2.17+ ARM64	Details
agent_lsp-0.20.0-py3-none-macosx_11_0_arm64.whl 11.7 MB Sep 26, 2026	Python 3	none	macOS 11.0+ ARM64	Details
agent_lsp-0.20.0-py3-none-macosx_10_12_x86_64.whl 12.1 MB Sep 26, 2026	Python 3	none	macOS 10.12+ x86-64	Details

Total release size: 64.1 MB

Release files / agent_lsp-0.20.0-py3-none-win_arm64.whl

Download URL	agent_lsp-0.20.0-py3-none-win_arm64.whl
Size	10.8 MB
Tags	Python 3 Windows ARM64
SHA-256 checksum How to use checksums	`088a6ba83dfd68c89da0ca5b70a23c1b9003496209e97ad106e6b92c8ccadafd`
BLAKE2b-256 checksum How to use checksums	`bd2c7900d6b314128335603243b79a9960ac6ccb9457679dc305d7276da75af1`
Upload date	Sep 26, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	No
Uploaded via	`twine/7.0.0 CPython/3.12.14`

Release files / agent_lsp-0.20.0-py3-none-win_amd64.whl

Download URL	agent_lsp-0.20.0-py3-none-win_amd64.whl
Size	6.0 MB
Tags	Python 3 Windows x86-64
SHA-256 checksum How to use checksums	`61724435f9c435919d740fdb886bc99db80b50f0a522445d8e924633bc98732a`
BLAKE2b-256 checksum How to use checksums	`a1736bcbd122aa54058286dd066129c1b9deb2e1cc3d2766ba734a233c7f10e8`
Upload date	Sep 26, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	No
Uploaded via	`twine/7.0.0 CPython/3.12.14`

Release files / agent_lsp-0.20.0-py3-none-manylinux2014_x86_64.whl

Download URL	agent_lsp-0.20.0-py3-none-manylinux2014_x86_64.whl
Size	12.0 MB
Tags	Linux glibc 2.17+ x86-64 Python 3
SHA-256 checksum How to use checksums	`ebe5757bd0e9d3741b6486523cf1b7bf96a666a10a7814913d6c6f49f9a2afde`
BLAKE2b-256 checksum How to use checksums	`1d26e7c51041d262ed2cfec42bc95e5ee0f1e4c618eb8ad4faa1a9aae56115ca`
Upload date	Sep 26, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	No
Uploaded via	`twine/7.0.0 CPython/3.12.14`

Release files / agent_lsp-0.20.0-py3-none-manylinux2014_aarch64.whl

Download URL	agent_lsp-0.20.0-py3-none-manylinux2014_aarch64.whl
Size	11.4 MB
Tags	Linux glibc 2.17+ ARM64 Python 3
SHA-256 checksum How to use checksums	`d369978e624842e629670237355bbc94433553cbc478c081f3671e59c91b980a`
BLAKE2b-256 checksum How to use checksums	`b8fd6896d737b34eecb302ac879e7d879413a4453457410f541598ab45f61e76`
Upload date	Sep 26, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	No
Uploaded via	`twine/7.0.0 CPython/3.12.14`

Release files / agent_lsp-0.20.0-py3-none-macosx_11_0_arm64.whl

Download URL	agent_lsp-0.20.0-py3-none-macosx_11_0_arm64.whl
Size	11.7 MB
Tags	Python 3 macOS 11.0+ ARM64
SHA-256 checksum How to use checksums	`901d7884ab56f25b84cd46c789909cc307726f4d6c690872a6f02d5a06f9d53a`
BLAKE2b-256 checksum How to use checksums	`52e5e31203aebd550df824cc021be7ce2538db31477624fd88e1b627d1f9c4df`
Upload date	Sep 26, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	No
Uploaded via	`twine/7.0.0 CPython/3.12.14`

Release files / agent_lsp-0.20.0-py3-none-macosx_10_12_x86_64.whl

Download URL	agent_lsp-0.20.0-py3-none-macosx_10_12_x86_64.whl
Size	12.1 MB
Tags	Python 3 macOS 10.12+ x86-64
SHA-256 checksum How to use checksums	`bf59d7f4f1f06ac6891de4027c4099ea9d160d75edfd17521070a1b31d4465d5`
BLAKE2b-256 checksum How to use checksums	`01e0da9b128901478088f6e459b1788833640483eb41c6641af446d23b8c2054`
Upload date	Sep 26, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	No
Uploaded via	`twine/7.0.0 CPython/3.12.14`