mcptools: Model Context Protocol Servers and Clients

Implements the Model Context Protocol (MCP). Users can start 'R'-based servers, serving functions as tools for large language models to call before responding to the user in MCP-compatible apps like 'Claude Desktop' and 'Claude Code', with options to run those tools inside of interactive 'R' sessions. On the other end, when 'R' is the client via the 'ellmer' package, users can register tools from third-party MCP servers to integrate additional context into chats.

Version: 0.1.1
Depends: R (≥ 4.1.0)
Imports: cli, ellmer (≥ 0.2.0), jsonlite, nanonext (≥ 1.6.0), processx, promises, rlang
Suggests: knitr, rmarkdown, testthat (≥ 3.0.0), withr
Published: 2025-09-08
DOI: 10.32614/CRAN.package.mcptools
Author: Simon Couch ORCID iD [aut, cre], Winston Chang ORCID iD [aut], Charlie Gao ORCID iD [aut], Posit Software, PBC ROR ID [cph, fnd]
Maintainer: Simon Couch <simon.couch at posit.co>
BugReports: https://github.com/posit-dev/mcptools/issues
License: MIT + file LICENSE
URL: https://github.com/posit-dev/mcptools, https://posit-dev.github.io/mcptools/
NeedsCompilation: no
Materials: README, NEWS
CRAN checks: mcptools results

Documentation:

Reference manual: mcptools.html , mcptools.pdf
Vignettes: R as an MCP server (source, R code)

Downloads:

Package source: mcptools_0.1.1.tar.gz
Windows binaries: r-devel: mcptools_0.1.0.zip, r-release: mcptools_0.1.0.zip, r-oldrel: mcptools_0.1.0.zip
macOS binaries: r-release (arm64): mcptools_0.1.1.tgz, r-oldrel (arm64): mcptools_0.1.1.tgz, r-release (x86_64): mcptools_0.1.1.tgz, r-oldrel (x86_64): mcptools_0.1.1.tgz
Old sources: mcptools archive

Reverse dependencies:

Reverse suggests: tidyprompt

Linking:

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