metacall/core

Health v2 · maintenance only

Adoption not part of the score

1813 stars · 258 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

MetaCall is an extensible, embeddable polyglot runtime that lets you call functions, methods, or procedures across multiple programming languages (Python, JavaScript, TypeScript, Ruby, C#, Java, Go, Rust, C/C++, WASM, and more) within a single application. It is the core engine behind MetaCall Hub, a deployment platform that turns functions into auto-generated APIs.

Use cases

• call a python function from javascript
• mix multiple programming languages in one application
• embed a scripting language interpreter into a c++ application
• build polyglot microservices without rewriting code
• expose functions from any language as http apis
• run nodejs and python code together in one process

When to choose

• you need seamless cross-language function calls without network overhead
• you want to embed interpreters for several languages in a single host application
• you are building a polyglot codebase and want to reuse existing modules across languages
• you need a runtime for mixed-language serverless or FaaS deployments

When to avoid

• you only work in a single language and standard tooling suffices
• you need strict process isolation or security sandboxing between languages
• your project depends on languages not yet supported by MetaCall's loaders
• you need battle-tested production FFI with a very large community

Facets

library · maturity active

interpreter rpc sdk plugin-system cli developer-tools programming-languages developer-tools cross-platform backend apis windows python cpp c rust go cli cross-platform polyglot-runtime ffi inter-language-calls function-mesh faas language-interop embeddable-runtime linux macos docker nodejs

Member repositories

For agents

markdown · JSON · MCP: product_card(name="metacall/core")