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mcplite: Lightweight Stdio MCP Server for R

Provides a lightweight Model Context Protocol (MCP) server for exposing 'R' functions as tools over standard input and output ('stdio'). Designed for local, client-launched integrations, with protocol-aware tool definitions and results, JSON Schema helpers, and optional interoperability with 'ellmer'.

Version: 0.1.0
Depends: R (≥ 4.1.0)
Imports: jsonlite, nanonext (≥ 1.6.0), otel
Suggests: ellmer (≥ 0.3.0), otelsdk, processx, testthat (≥ 3.0.0), withr
Published: 2026-08-03
DOI: 10.32614/CRAN.package.mcplite
Author: Juha Itkonen [aut, cre, cph]
Maintainer: Juha Itkonen <juha at tosidata.com>
BugReports: https://github.com/tosidata/mcplite/issues
License: MIT + file LICENSE
URL: https://tosidata.github.io/mcplite/, https://github.com/tosidata/mcplite
NeedsCompilation: no
Materials: README, NEWS
CRAN checks: mcplite results

Documentation:

Reference manual: mcplite.html , mcplite.pdf

Downloads:

Package source: mcplite_0.1.0.tar.gz
Windows binaries: r-devel: mcplite_0.1.0.zip, r-release: mcplite_0.1.0.zip, r-oldrel: mcplite_0.1.0.zip
macOS binaries: r-release (arm64): mcplite_0.1.0.tgz, r-oldrel (arm64): mcplite_0.1.0.tgz, r-release (x86_64): mcplite_0.1.0.tgz, r-oldrel (x86_64): mcplite_0.1.0.tgz

Linking:

Please use the canonical form https://CRAN.R-project.org/package=mcplite to link to this page.

These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.