MCP for auth in 5 minutes: phone verification through your AI agent
Most AI coding tutorials stop at "ask the agent to write code". This one is about giving the agent a tool it can call, an MCP server, so it can send and verify one-time codes while you're still building. I work at MyOTP.App and this uses our server, so read it with that in mind. If you're on Claude Code, Claude Desktop, Cursor, Codex or anything else that speaks MCP, this takes about five…
This article explains how to add phone verification to AI-powered coding assistants using an MCP (Multi-Channel Protocol) server. The server allows the AI agent to send and verify one-time codes, ensuring the integration works when the assistant is being developed. It takes about five minutes to set up and works with several AI platforms, including Claude Code, Claude Desktop, Cursor, and Codex.
To get started, sign up for an API key at MyOTP.App, where new accounts receive 15 trial credits with no card required. Add your IP address to the key's allowlist or use an asterisk while developing locally. Add the server to your client configuration, either through Claude Code or Claude Desktop's configuration file. Restart the client, and you can then send an OTP to a phone number and verify the code received.
The MCP server provides ten tools, with the most commonly used four being generate_otp, verify_otp, check_otp_status, and extend_otp. The remaining tools handle account-related tasks like account information, status, usage reports, and refilling credits. The server does not replace your application's reliance on the REST API but rather serves as a tool for the AI agent to perform phone verification tasks.
However, a potential issue is IP allowlisting; if a call from a server or hosted MCP endpoint returns a 403 error, it indicates that the IP is not allowed.
Written by urgent.news from Dev.to's reporting — not their text. Machine-written — may contain errors; check the original before relying on it.
