by Sendmux
Official SDKs, CLI, and MCP servers for Sendmux email APIs across TypeScript, Python, Go, PHP, Rust, and Ruby.
# Add to your Claude Code skills
git clone https://github.com/Sendmux/sendmux-sdkGuides for using mcp servers skills like sendmux-sdk.
Last scanned: 6/18/2026
{
"issues": [],
"status": "PASSED",
"scannedAt": "2026-06-18T08:48:32.570Z",
"npmAuditRan": false,
"pipAuditRan": true,
"promptInjectionRan": true
}sendmux-sdk is an open-source mcp servers skill for AI coding assistants such as Claude Code, Codex CLI, and ChatGPT, built by Sendmux. Official SDKs, CLI, and MCP servers for Sendmux email APIs across TypeScript, Python, Go, PHP, Rust, and Ruby. It has 110 GitHub stars.
Yes. sendmux-sdk passed SkillsLLM's automated security scan — a dependency vulnerability audit plus prompt-injection heuristics — with no high-severity issues. You can read the full report in the Security Report section on this page.
Clone the repository with "git clone https://github.com/Sendmux/sendmux-sdk" and add it to your Claude Code skills directory (see the Installation section above).
sendmux-sdk is primarily written in PHP. It is open-source under Sendmux on GitHub, so you can review or fork the full source.
Yes. SkillsLLM lists many other MCP Servers skills you can browse and compare side by side. Open the MCP Servers category from the badge at the top of this page, or use the Related Skills and comparison links further down to weigh sendmux-sdk against similar tools.
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Top skills in this category by stars
Official SDK, CLI, and MCP workspace for Sendmux.
| Ecosystem | Package | Surface | API key or auth | Install | Source |
|---|---|---|---|---|---|
| npm | @sendmux/core |
Shared TypeScript helpers | n/a | npm install @sendmux/core |
packages/ts/core |
| npm | @sendmux/sending |
Sending API | smx_mbx_* |
npm install @sendmux/sending |
packages/ts/sending |
| npm | @sendmux/mailbox |
Mailbox API | smx_mbx_* |
npm install @sendmux/mailbox |
packages/ts/mailbox |
| npm | @sendmux/management |
Management API | smx_root_* |
npm install @sendmux/management |
packages/ts/management |
| npm | @sendmux/sdk |
TypeScript umbrella package | surface-specific | npm install @sendmux/sdk |
packages/ts/sdk |
| npm | @sendmux/cli |
sendmux CLI |
command/profile-specific | npm install -g @sendmux/cli |
packages/ts/cli |
| Homebrew | sendmux |
sendmux CLI |
command/profile-specific | brew install sendmux/tap/sendmux |
Sendmux/homebrew-tap |
| PyPI | sendmux-core |
Shared Python helpers | n/a | pip install sendmux-core |
packages/python/core |
| PyPI | sendmux-sending |
Sending API | smx_mbx_* |
pip install sendmux-sending |
packages/python/sending |
| PyPI | sendmux-mailbox |
Mailbox API | smx_mbx_* |
pip install sendmux-mailbox |
packages/python/mailbox |
| PyPI | sendmux-management |
Management API | smx_root_* |
pip install sendmux-management |
packages/python/management |
| PyPI | sendmux-sdk |
Python umbrella package | surface-specific | pip install sendmux-sdk |
packages/python/sdk |
| PyPI | sendmux-mcp |
Local, self-hosted, and hosted MCP servers | OAuth for hosted; surface-specific keys for local | pip install sendmux-mcp |
packages/python/mcp |
| Go | sendmux.ai/go/core |
Shared Go helpers | n/a | go get sendmux.ai/go@v1.0.0 |
go/core |
| Go | sendmux.ai/go/sending |
Sending API | smx_mbx_* |
go get sendmux.ai/go@v1.0.0 |
go/sending |
| Go | sendmux.ai/go/mailbox |
Mailbox API | smx_mbx_* |
go get sendmux.ai/go@v1.0.0 |
go/mailbox |
| Go | sendmux.ai/go/management |
Management API | smx_root_* |
go get sendmux.ai/go@v1.0.0 |
go/management |
| Go | sendmux.ai/go/sdk |
Go umbrella package | surface-specific | go get sendmux.ai/go@v1.0.0 |
go/sdk |
| Packagist | sendmux/core |
Shared PHP helpers | n/a | composer require sendmux/core:^1.0 |
packages/php/core |
| Packagist | sendmux/sending |
Sending API | smx_mbx_* |
composer require sendmux/sending:^1.0 |
packages/php/sending |
| Packagist | sendmux/mailbox |
Mailbox API | smx_mbx_* |
composer require sendmux/mailbox:^1.0 |
packages/php/mailbox |
| Packagist | sendmux/management |
Management API | smx_root_* |
composer require sendmux/management:^1.0 |
packages/php/management |
| Packagist | sendmux/sdk |
PHP umbrella package | surface-specific | composer require sendmux/sdk:^1.0 |
packages/php/sdk |
| RubyGems | sendmux-core |
Shared Ruby helpers | n/a | gem install sendmux-core |
packages/ruby/core |
| RubyGems | sendmux-sending |
Sending API | smx_mbx_* |
gem install sendmux-sending |
packages/ruby/sending |
| RubyGems | sendmux-mailbox |
Mailbox API | smx_mbx_* |
gem install sendmux-mailbox |
packages/ruby/mailbox |
| RubyGems | sendmux-management |
Management API | smx_root_* |
gem install sendmux-management |
packages/ruby/management |
| RubyGems | sendmux-sdk |
Ruby umbrella package | surface-specific | gem install sendmux-sdk |
packages/ruby/sdk |
Install only the package for the surface you need.
npm install @sendmux/sending
pip install sendmux-sending
go get sendmux.ai/go@v1.0.0
composer require sendmux/sending:^1.0
gem install sendmux-sending
Use mailbox-scoped smx_mbx_* keys for Sending and Mailbox clients. Use root smx_root_* keys for Management clients.
For command-line access, install the CLI:
brew install sendmux/tap/sendmux
npm install -g @sendmux/cli
sendmux --help
For MCP clients, install sendmux-mcp or connect to the hosted MCP endpoint:
pip install sendmux-mcp
sendmux-mcp-mailbox --help
The hosted product MCP endpoint is https://mcp.sendmux.ai/mcp. Local MCP commands support stdio and HTTP transports; hosted MCP uses OAuth.
| Path | Purpose |
|---|---|
packages/ts |
TypeScript SDK packages and the sendmux CLI. |
packages/python |
Python SDK packages and the sendmux-mcp package. |
go |
Go module sendmux.ai/go and subpackages. |
packages/php |
PHP package sources used for Packagist packages and public split repositories. |
packages/ruby |
RubyGem package sources. |
codegen |
Generator configuration and templates. |
scripts |
Generation, verification, publishing, and release helper scripts. |
docs |
Surface-coverage and live E2E audit artefacts. |
.github/workflows |
CI, canary, live E2E, and release workflows. |
SDK packages track the Sendmux public API contracts. Patch versions can differ between packages when a fix only affects one ecosystem or runtime.
Generated clients are built from committed OpenAPI snapshots. Any API contract change must update the snapshots and generated output in the same change.
For help, open a GitHub issue with the package name, version, command or import path, and the request ID from any API error response.
Open pull requests against this repository. Keep generated output, source snapshots, and verification artefacts together in the same change.
Security issues should be reported through GitHub Security Advisories.
This repository is available under the MIT licence.