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 0.19.4

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 0.19.4
File	Interpreter	ABI	Platform	Reset
agent_lsp-0.19.4-py3-none-win_arm64.whl 10.8 MB Sep 20, 2026	Python 3	none	Windows ARM64	Details
agent_lsp-0.19.4-py3-none-win_amd64.whl 6.0 MB Sep 20, 2026	Python 3	none	Windows x86-64	Details
agent_lsp-0.19.4-py3-none-manylinux2014_x86_64.whl 12.0 MB Sep 20, 2026	Python 3	none	Linux glibc 2.17+ x86-64	Details
agent_lsp-0.19.4-py3-none-manylinux2014_aarch64.whl 11.4 MB Sep 20, 2026	Python 3	none	Linux glibc 2.17+ ARM64	Details
agent_lsp-0.19.4-py3-none-macosx_11_0_arm64.whl 11.7 MB Sep 20, 2026	Python 3	none	macOS 11.0+ ARM64	Details
agent_lsp-0.19.4-py3-none-macosx_10_12_x86_64.whl 12.1 MB Sep 20, 2026	Python 3	none	macOS 10.12+ x86-64	Details

Total release size: 64.0 MB

Release files / agent_lsp-0.19.4-py3-none-win_arm64.whl

Download URL	agent_lsp-0.19.4-py3-none-win_arm64.whl
Size	10.8 MB
Tags	Python 3 Windows ARM64
SHA-256 checksum How to use checksums	`9a05ae40a474e6987278e96f1e613ae2b5f70076ec35fd9f656d95396e5213e9`
BLAKE2b-256 checksum How to use checksums	`d548d27a895408c35916f2d6fdffdd3daa7c5604422fc1a0162d6f17d3c5a99d`
Upload date	Sep 20, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	No
Uploaded via	`twine/7.0.0 CPython/3.12.14`

Release files / agent_lsp-0.19.4-py3-none-win_amd64.whl

Download URL	agent_lsp-0.19.4-py3-none-win_amd64.whl
Size	6.0 MB
Tags	Python 3 Windows x86-64
SHA-256 checksum How to use checksums	`66a910f277633e37b15f0966af6e78c221d76b4c45a4b8d5676616abc6608e6b`
BLAKE2b-256 checksum How to use checksums	`b44546ffad30eedff3b5ee6223db4c43b5742fa62e2ed5233f88de1c347077ef`
Upload date	Sep 20, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	No
Uploaded via	`twine/7.0.0 CPython/3.12.14`

Release files / agent_lsp-0.19.4-py3-none-manylinux2014_x86_64.whl

Download URL	agent_lsp-0.19.4-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	`f69366dea0fda570fbef560b57a146ee8d57f9ab54399c45e2d4b12fd5d1cff6`
BLAKE2b-256 checksum How to use checksums	`b6632b1dbdffd86332c178a4094f6744f40da0198d046fce53b4722edbcec661`
Upload date	Sep 20, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	No
Uploaded via	`twine/7.0.0 CPython/3.12.14`

Release files / agent_lsp-0.19.4-py3-none-manylinux2014_aarch64.whl

Download URL	agent_lsp-0.19.4-py3-none-manylinux2014_aarch64.whl
Size	11.4 MB
Tags	Linux glibc 2.17+ ARM64 Python 3
SHA-256 checksum How to use checksums	`211ebab548d2a63be699b1ee4d22c9c0a3e081a9746946c23a5856e1005e0671`
BLAKE2b-256 checksum How to use checksums	`b5829058fc3b1ee2b65e6dd8c6d7df46e38cfaea250376005d67a2fcfc55942b`
Upload date	Sep 20, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	No
Uploaded via	`twine/7.0.0 CPython/3.12.14`

Release files / agent_lsp-0.19.4-py3-none-macosx_11_0_arm64.whl

Download URL	agent_lsp-0.19.4-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	`a2df573690c9ff4ef0aaa9b9fb109a342a37e35d6f6de65f07843a3920b1a063`
BLAKE2b-256 checksum How to use checksums	`e8e9b96468fadd68a67e3c8121ab9e519aaa0e22a7ebdefb0896889b2019a67f`
Upload date	Sep 20, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	No
Uploaded via	`twine/7.0.0 CPython/3.12.14`

Release files / agent_lsp-0.19.4-py3-none-macosx_10_12_x86_64.whl

Download URL	agent_lsp-0.19.4-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	`ab952a1f101276d2bbd6530cec37192b0d0d7fec14d59121d8820662895e916b`
BLAKE2b-256 checksum How to use checksums	`61a0542c2c1cc6de9ab6ec2f6334f23eff916988d8858d8df74896c09f188afb`
Upload date	Sep 20, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	No
Uploaded via	`twine/7.0.0 CPython/3.12.14`