How to give your AI agent a phone number
A practical guide to provisioning a real phone line for an AI agent: API steps, webhooks, compliance basics, and how to connect your voice stack.
Guides: phone numbers for AI agents
AI agent SMS API explained
Learn how SMS APIs work for AI agents: sending, receiving, webhooks, threading, delivery receipts, and design patterns for conversational text agents.
How AI voice agents receive phone calls
Understand inbound call flow for AI agents: webhooks, SIP, WebSocket media, latency, handoff to humans, and how to bring your own voice stack.
How to connect a phone number to Vapi
Put a phone number on a Vapi assistant: free Vapi number, Twilio import, Telnyx import, BYO SIP trunk, and the POST /phone-number API call.
How to connect a phone number to Retell AI
Connect a phone number to a Retell AI agent: buy a Retell number, or bring your own Twilio or Telnyx number over SIP trunking. Plus SMS setup and costs.
How to give Claude or any MCP agent a phone number
Give Claude Code, Claude Desktop, or any MCP agent a real phone number. Telephony MCP servers compared, with install commands and safety rules.
A2P 10DLC registration for AI agents
Register an AI agent's SMS number for A2P 10DLC: brand types, use cases, 2026 fees, approval time, toll-free vs 10DLC, and why campaigns get rejected.