The booth73 blog
Notes on letting AI agents place real phone calls — comparison guides, technical deep-dives, use-case walkthroughs. Each post is also available as raw markdown for AI agents that prefer to ingest that format.
AI voice calling APIs in 2026: booth73 vs Bland vs Vapi vs Retell
An honest comparison of AI voice calling platforms — what each one is actually for, what they cost, and how to pick. Written for people who want their AI agent to make a phone call and aren't sure what to install.
How to give Claude a phone number (the booth73 MCP server)
A concrete walkthrough for letting Claude place real phone calls on your behalf — install the booth73 MCP server, hand it a card code, ask Claude to call. With a complete example transcript and the TCPA flow.
Inside an AI phone call: how Twilio, Deepgram, Cartesia, and Claude make the line sound human
A technical walkthrough of the pipeline behind an AI-driven phone call — from the moment Twilio's PSTN gateway connects, through Deepgram's speech-to-text, Claude's reasoning, and Cartesia's voice synthesis — and the latency budget that determines whether the conversation feels natural or robotic.