Sendmux

Email API designed for AI agents, with a free tier and active development.

What is Sendmux?

Sendmux is an email API designed for AI agents and automated workflows. Developers can plug transactional and campaign email into agentic pipelines with a free tier to start, and the project is actively maintained on GitHub.

Key features

  • Email API built for AI agents
  • Free tier to start
  • Active open development on GitHub

Pros

  • Purpose-built for AI-agent email workflows
  • Free tier for getting started
  • Actively developed open project

Cons

  • Requires a developer to integrate; no no-code sender for marketers
  • Email deliverability depends on your own sending setup

Sendmux at a glance

PricingFreemium
CategoryWriting & Content
Platformsweb, api
Official websitesendmux.ai
emailemail-apiai-agentsdeveloper-tool

How to choose the right Writing & Content tool

A good writing tool should make your words better, not just faster. Look at the quality of its suggestions on your own kind of writing — articles, emails, marketing copy or academic work — and whether it can match a tone you set rather than forcing a generic voice. Practical checks: does it help with structure and headlines, or only grammar? Are there tools for rewriting, shortening and expanding? If you publish online, SEO guidance and plagiarism checking are worth having. Be careful with tools that promise fully automatic articles: search engines and readers both reward original, edited work, so choose a tool that strengthens your draft instead of replacing your judgement.

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Sendmux FAQs

What is Sendmux?

Sendmux is an email API designed for AI agents and automated workflows. Developers can plug transactional and campaign email into agentic pipelines with a free tier to start, and the project is actively maintained on GitHub.

What are the main features of Sendmux?

Sendmux offers Email API built for AI agents, Free tier to start and Active open development on GitHub.

How much does Sendmux cost?

Sendmux follows a freemium model: a free tier is available, and paid plans unlock higher limits and advanced features. Check its official website for current plan prices.

What are the pros and cons of Sendmux?

Strengths of Sendmux include Purpose-built for AI-agent email workflows; Free tier for getting started; Actively developed open project. On the downside, Requires a developer to integrate; no no-code sender for marketers; Email deliverability depends on your own sending setup.