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MedDRA Explorer & Classifier is an open web and API experience for searching adverse-event terminology and mapping free-text narratives to standard MedDRA codes. These docs walk through the product surface, API conventions, and endpoint details so you can integrate quickly.

Jump to the Quickstart

Learn how to explore versions, look up codes, and classify an event in minutes.

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What you can do

Browse MedDRA releases

Understand how we mirror official releases and switch between them on demand.

Search the terminology

Hit the /codes endpoint to filter by hierarchy, free-text search, and change history.

Classify narratives

Submit a description and receive the most relevant MedDRA Preferred Terms with confidence scores.

Track changes

Compare releases to see newly introduced, updated, or retired terminology.

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Key concepts

  • Latest by default – Every page and endpoint resolves to the most recent MedDRA release unless you explicitly select another version through a query parameter or the X-MedDRA-Version header.
  • Header-based API versioning – The platform evolves behind the X-API-Version header so clients can opt into breaking changes before we promote them to the default.
  • No authentication (for now) – All endpoints are public. Typical rate limits are exposed via response headers.
  • Traceable data sources – Each release is aligned with the official MedDRA distribution, including change logs and hierarchy context.

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Ready to build?

Head over to the API reference or dive straight into the Quickstart for curl-ready examples. If you need deeper architectural context, keep reading the rest of the guides.
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