Multilspy – Cross platform framework to develop Language Server Clients
multilspy is a cross-platform library that we have built to set up and interact with various language servers in a unified and easy way. Language servers are tools that perform a variety of static analyses on source code and provide useful information such as type-directed code completion suggestions, symbol definition locations, symbol references, etc., over the Language Server Protocol (LSP). multilspy intends to ease the process of using language servers, by abstracting the setting up of the language servers, performing language-specific configuration and handling communication with the…
In plain words
Multilspy is a cross-platform library that simplifies interaction with language servers across multiple programming languages. It automates the setup and configuration of language servers while handling communication through the Language Server Protocol, providing a unified interface for developers. The framework enables access to static code analysis features like code completion, symbol definitions, and references without language-specific complexity. It is designed for developers building tools that need standardized access to language intelligence and is easily extensible to support additional languages.
written from the facts on this page · September 2026
From the sources
In the maker’s words, at launch
multilspy is a cross-platform library that we have built to set up and interact with various language servers in a unified and easy way. Language servers are tools that perform a variety of static analyses on source code and provide useful information such as type-directed code completion suggestions, symbol definition locations, symbol references, etc., over the Language Server Protocol (LSP). multilspy intends to ease the process of using language servers, by abstracting the setting up of the language servers, performing language-specific configuration and handling communication with the server over the json-rpc based protocol, while exposing a simple interface to the user. Since LSP is language-agnostic, multilspy can provide the results for static analyses of code in different languages over a common interface. multilspy is easily extensible to any language that has a Language Server and currently supports Java, Rust, C# and Python and we aim to support more language servers. Some of the analyses results that multilspy can provide are: Finding the definition of a function or a class (textDocument/definition) Finding the callers of a function or the instantiations of a class (textDocument/references) Providing type-based dereference completions (textDocument/completion) Getting information displayed when hovering over symbols, like method signature (textDocument/hover) Getting list/tree of all symbols defined in a given file, along with symbol type like class, method, etc. (textDocument/documentSymbol)
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