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Catalogue/MCP servers/Opencode MCP Java Lsp

Opencode MCP Java Lsp

kealthas-dev · MCP server

Opencode MCP Java Lsp gives the opencode coding agent semantic Java tools: go to definition, find references, hover, find implementations, list document and workspace symbols, and read diagnostics. It drives a real Eclipse JDT language server over stdio, so the analysis is the language server's own. It runs as a persistent HTTP server that opencode connects to, set up for one Java project. It needs a recent JDK and python3 on your path, and you can point the language server at a different JDK to analyse an older project.

Written by ooruby from the README of @kealthas-dev/opencode-mcp-java-lsp 1.1.3.

Not claimed by its maker. Is this yours? Prove it and answer the findings

Why it's useful

Your agent gets Java code intelligence from a real language server, with an older project analysed under the JDK you choose instead of your shell's default java.

What you could do with it

  1. 1Ask your agent to jump to the definition of a Java class or method and list everything that references it.
  2. 2Have your agent read hover details and find the implementations of an interface in your project.
  3. 3Analyse an older Java project by pointing the language server at the JDK it targets, leaving your shell's java alone.

Written from its documentation: what it says it can do, not what our checks found.

OJMCP serverDeveloper tools

Maintenance

Not measured

No release date is on record for this package yet. The nightly publisher check records one as it reaches each npm package, about once every ten nights.

Release activity only: it says nothing about quality or safety, and a finished small package can be fine without releases. How it is measured

Not yet tested
Licence and provenance
finding
no LICENCE file at the root (.)

Published because it was found. A finding is information about where the limits are, not a verdict that the software is unsafe.

What this does not cover

  • ·Everything. Treat it as you would software from anywhere else.

Receipt history: every signed receipt for every version of this listing, and what changed between them.

In its maker's words

MCP server exposing jdtls (Java LSP) code-intelligence tools - see README.md for design and the config.json-driven config

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How far this has been checked

Static scanned

What it establishes
Its published package, or for a hosted server its source repository at a recorded commit, was read file by file, without running it, by every check in our current scan.
What it does not
How it behaves when it runs, or anything the scan does not read yet: several rubric checks, the repository's history, and compiled code in folders named dist or build. For a hosted server, that the endpoint runs the code that was read. The ooruby Index sets out exactly what was read.
Exactly what was read
Version 1.1.3, the file with digest sha512-bNMC9OhX66mHIU/I5xbpHOhwNO8xQErha1Ya1YgFGS1KQ4k24wy/qJPyGbJPlJlqQaQdnu0y56HDqnPjOhP9gQ==, as the registry publishes it. A published version cannot be replaced, so this names the same bytes for anyone who checks.
Authentication
Runs locally. No hosted endpoint is listed for this package. You run it on your own machine, so there is no endpoint of ours to authenticate against.
How the rungs work

Adding it

Paste this into your client's MCP configuration.

{
  "mcpServers": {
    "opencode-mcp-java-lsp": {
      "command": "npx",
      "args": [
        "-y",
        "@kealthas-dev/opencode-mcp-java-lsp@1.1.3"
      ]
    }
  }
}

Or run it directly.

npx -y @kealthas-dev/opencode-mcp-java-lsp@1.1.3

Pinned to 1.1.3, which is the version the findings above were found in. Drop the version to take whatever is newest, and the report on this page stops describing what you installed.

Where this came from

Registry
npm
Package
@kealthas-dev/opencode-mcp-java-lsp
Version read
1.1.3
Resolved
2026-10-10
Open the source(opens in a new tab)

Built from source, attested

npm publishes a signed statement that this exact package was built from the repository below, at this commit. It is verifiable without taking our word for it.

Repository
github.com/keal-thas/opencode-toolkit
Commit
77af2e3191b6
Built by
github.com/actions/runner/github-hosted
Registry publish attestation
signed by npm · 2026-10-10
Checked
2026-10-10

The badge, if this is your listing

It renders the current rung (static scanned) and links back here, where what that does and does not establish is one click away. It updates itself as the evidence deepens.

[![ooruby: static scanned](https://ooruby.com/api/badge/kealthas-dev-opencode-mcp-java-lsp)](https://ooruby.com/market/kealthas-dev-opencode-mcp-java-lsp)

About this listing

Kind
MCP server
Category
Developer tools
Pricing
Free
Sandbox
No
Hosted
No
Updated
2026-10-05
Price
Free
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Rating
no reviews yet
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Verification records what our published tests found on a specific version at a specific date. It is not a warranty, and it does not certify that software is free of defects.