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Overview

Twilio Segment is a customer data platform: it collects events and user traits from websites, apps and servers, cleans them, and routes them to the analytics, CRM and marketing tools connected as destinations. The HTTP Tracking API records identify, track, group, page and batch calls for one source and authenticates with that source's write key (in the source, open Settings and then API Keys). Send it as Basic auth: `SEGMENT_API_KEY` holds the base64 of the write key followed by a colon, `<write key>:`. Workspaces in the EU send to `https://events.eu1.segmentapis.com` with a write key from an EU workspace; Segment rejects data sent to the wrong region. The Public API at `https://api.segmentapis.com`, which manages sources, destinations and Engage audiences, takes a separate workspace token and is not the API listed here.