ChEBI API
ChEBI API
ChEBI (Chemical Entities of Biological Interest, ebi.ac.uk/chebi), maintained by EMBL-EBI, provides a keyless REST API for a curated dictionary of small molecules of biological interest (names, structures, ontology roles). A live compound query confirms the service (CHEBI:15377, water).
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Required under CC BY 4.0.
Coverage
Small molecules of biological interest — names, structures, roles and ontology relationships — confirmed live today via a compound query (CHEBI:15377, water). History start: the About page says, "ChEBI was first released in 2004." Update frequency: the Downloads page says, "Each month, a new version of ChEBI is published, accompanied by updated downloadable files," and adds, "Ontology files are updated nightly in addition to the regular monthly releases."
Verdict
Keyless REST API for ChEBI's curated dictionary of small molecules of biological interest (names, structures, ontology roles), maintained by EMBL-EBI (confirmed live today via a compound query, CHEBI:15377). Licensed CC-BY-4.0: "The data on this website is available under the Creative Commons License (CC BY 4.0), and governed by EMBL-EBI’s terms of use and Long-term data preservation policy." Rate limits: Not stated. Signal Lab links only.
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