User communication tools for agents

Email inbox API for AI agents — give your agent its own email address

Speech AI APIs for transcription, understanding, and voice agents

Email platform for developers and AI agents — transactional and marketing

Enterprise API platform for automated AI phone calls

Simulation, evaluation, and monitoring for voice and chat agents

Real-time audio and video infrastructure for conversational agents

Speech-to-text, text-to-speech, and voice agent APIs

AI audio platform — text-to-speech, voice cloning, and sound generation

Generative media APIs optimized for fast inference

Technical knowledge platform for support and coding agents

Hosted MCP integrations for enterprise AI agents

Open-source notification infrastructure for multi-channel messaging

Control plane for supervising coding agents from anywhere

Open-source multi-channel messaging framework for AI agents

Managed OAuth and 10,000+ API tools for AI agents

Conversational voice models and APIs for real-time agents

Open-source agentic social media scheduling and management tool

Receive all emails as JSON webhooks — one MX record, all domains free

Universal meeting bot and recording API for AI applications

Email API built for developers and agents

Voice agent API for production phone automation

Managed and open-source webhooks for agent event delivery

Voice AI platform for building production phone agents

Embeddable review and approval infrastructure for agent-generated work