generated: '2026-08-26' method: searched source: https://docs.paubox.com/sdks description: >- First-party Paubox client libraries, the CLI, the MCP server package and the n8n community node. Package names were read from each SDK's own quickstart page on docs.paubox.com; version and published date were read from the registry metadata endpoint for each ecosystem on 2026-08-26. Every entry is first-party: all source repositories live under https://github.com/Paubox. packages: - language: javascript registry: npm name: paubox-node url: https://www.npmjs.com/package/paubox-node source: https://github.com/Paubox/paubox-node install: npm install --save paubox-node official: true version: 1.5.0 published: '2026-08-21' - language: javascript registry: npm name: paubox-cli url: https://www.npmjs.com/package/paubox-cli source: https://github.com/Paubox/paubox-cli install: npm install -g paubox-cli official: true version: 1.0.1 published: '2026-08-25' note: The Paubox CLI binary. Command surface captured in cli/paubox-cli.yml. - language: javascript registry: npm name: n8n-nodes-paubox url: https://www.npmjs.com/package/n8n-nodes-paubox source: https://github.com/Paubox/n8n-nodes-paubox install: npm install n8n-nodes-paubox official: true version: 1.0.4 published: '2025-10-24' note: >- Paubox's own n8n community node for HIPAA compliant transactional email. Oldest first-party release in the set by roughly ten months. - language: javascript registry: npm name: "@paubox/mcp" url: https://www.npmjs.com/package/@paubox/mcp source: https://github.com/Paubox/paubox-mcp install: npx -y @paubox/mcp@latest official: true version: null published: null note: >- ADVERTISED BUT NOT RESOLVABLE. docs.paubox.com/mcp-server/quickstart and /mcp-server/authentication both instruct clients to run `npx -y @paubox/mcp@latest` for the stdio transport, but https://registry.npmjs.org/@paubox%2Fmcp returned 404 on 2026-08-26, as did the unscoped `paubox-mcp`. The source repository github.com/Paubox/paubox-mcp is public and was pushed 2026-08-24, so the package appears to be documented ahead of publication. The hosted HTTP transport at https://mcp.paubox.com/mcp is live and unaffected. - language: python registry: pypi name: paubox-python3 url: https://pypi.org/project/paubox-python3/ source: https://github.com/Paubox/paubox-python3 install: pip3 install paubox-python3 official: true version: 1.0.1 published: '2021-06-09' note: >- Decay signal: the Python SDK's last PyPI release predates the current Email API documentation set and the 2026-08 release wave that refreshed the Ruby, Go, Rust, PHP and Node libraries. The GitHub repository was pushed 2026-08-25, so the code has moved without a corresponding publish. - language: ruby registry: rubygems name: paubox url: https://rubygems.org/gems/paubox source: https://github.com/Paubox/paubox-ruby install: gem install paubox official: true version: 1.0.0 published: '2026-08-21' - language: ruby registry: rubygems name: paubox_rails url: https://rubygems.org/gems/paubox_rails source: https://github.com/Paubox/paubox-rails install: gem 'paubox_rails' official: true version: 1.0.0 published: '2026-08-21' note: ActionMailer delivery method for Rails applications. - language: php registry: packagist name: paubox/paubox-php url: https://packagist.org/packages/paubox/paubox-php source: https://github.com/Paubox/paubox-php install: composer require paubox/paubox-php official: true version: v1.2.0 published: '2026-08-21' - language: go registry: goproxy name: github.com/Paubox/paubox-go url: https://pkg.go.dev/github.com/Paubox/paubox-go source: https://github.com/Paubox/paubox-go install: go get github.com/paubox/paubox-go official: true version: v1.0.0 published: '2026-08-20' - language: rust registry: crates.io name: paubox url: https://crates.io/crates/paubox source: https://github.com/Paubox/paubox-rust install: cargo add paubox official: true version: 1.0.0 published: '2026-08-21' note: >- docs.paubox.com/rust-sdk/quickstart still tells readers to pin `paubox = "0.1"` while crates.io has published 1.0.0. - language: perl registry: cpan name: Paubox_Email_SDK url: https://metacpan.org/dist/Paubox-Email-SDK source: https://github.com/Paubox/paubox-perl install: cpanm Paubox_Email_SDK official: true version: null published: null note: >- Version not recorded. The MetaCPAN release query for this distribution did not return a usable release document on 2026-08-26; rather than guess from the GitHub tag, this is left null. The GitHub repository github.com/Paubox/paubox-perl was pushed 2026-08-25. - language: java registry: none name: Paubox.Email.API.jar url: https://github.com/Paubox/paubox-java source: https://github.com/Paubox/paubox-java install: Download Paubox.Email.API.jar from the repository and add it to the classpath official: true version: null published: null note: >- DISTRIBUTED AS A REPOSITORY JAR, NOT A REGISTRY ARTIFACT. The Java quickstart instructs developers to download the JAR and add it to the classpath. No Maven Central coordinate is published for it, so there is no metadata endpoint to read a version or date from, and a consumer cannot pin a dependency. - language: csharp registry: none name: Paubox.Email.API.dll url: https://github.com/Paubox/paubox-csharp source: https://github.com/Paubox/paubox-csharp install: Clone the repository and reference lib/Paubox.Email.API.dll official: true version: null published: null note: >- DISTRIBUTED AS A REPOSITORY DLL, NOT A NUGET PACKAGE. The C# quickstart instructs developers to add lib/Paubox.Email.API.dll as a project reference. api.nuget.org returned 404 for both `paubox` and `paubox.csharp` on 2026-08-26, so there is no registry metadata to read and no version to pin.