ChEBI Chemical Ontology

Query the ChEBI chemical ontology database via the EBI OLS4 API for compound data, classifications, and molecular relationships.

GitHub
Category APIs
Added Mar 28, 2026
Views 1

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Provides access to the Chemical Entities of Biological Interest (ChEBI) ontology through the EBI OLS4 API. Enables searching for chemical compounds, retrieving detailed entity information including molecular formulas and structures, exploring hierarchical classifications, and navigating relationships between chemical entities. Supports both exact and fuzzy search with configurable result limits.

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