Machine Learning — entry 012 of 24
Keen
Keen (formerly Keen IO) is an event-streaming and real-time analytics platform: send events over a REST or Kafka-compatible ingestion API, then query, visualize, or replicate them via the Data API, Compute API, and embeddable dashboards. Chargify acquired Keen in March 2020 and folded it into an events-based-billing product line; the service is now sold as a sales-led SaaS plan starting at $149/month with no self-serve free tier, only a "Request a Demo" flow. Live-checked in July 2026: keen.io and its api.keen.io endpoints (PROJECT_ID plus read/write key auth) are active, with CORS enabled on API responses.
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<a href="https://greatapis.com/api/keen-io/"><img src="https://greatapis.com/badge/keen-io.svg" alt="Scored 67 on greatapis.com"></a>Auth quickstart
- Sign up with the provider to get an API key.
- Send it on every request as a header
Authorization: <key> - The exact header isn't documented — Authorization is a common default; confirm in the provider's docs.
Your key is stored only in this browser (localStorage) and sent directly to the API — never to greatapis.