Documentation

Everything about the platform itself — keys, the gateway, metering and MCP. Reference documentation for an individual API lives on that API's own page.

Quickstart

Make your first Twotic API call in under five minutes: create a key, subscribe to an API, and read the cost off the response header.

Authentication

How Twotic API keys work: one key across every API, two accepted header forms, hashed storage, and how to rotate a key without downtime.

Errors and limits

Every error the Twotic gateway can return, what causes it, whether you were charged, and how rate limiting and automatic refunds work.

MCP for agents

Connect any Twotic API to Claude, ChatGPT, Cursor or another MCP client — with a one-click OAuth sign-in, or an API key if you prefer.