NCBI E-Utilities API
The NCBI E-Utilities (Entrez Programming Utilities) are the public API to the NCBI Entrez system providing access to all Entrez databases including PubMed (biomedical literature), PMC (full-text articles), Gene, Nuccore (nucleotide sequences), Protein, and 39 other databases. Supports search, retrieval, linking, and posting operations. API keys from ncbi.nlm.nih.gov/account/ increase the rate limit from 3 to 10 requests/second.
Documentation
Specifications
Other Resources
Portal
https://www.ncbi.nlm.nih.gov/home/develop/api/
SpectralRules
https://raw.githubusercontent.com/api-evangelist/united-states-national-library-of-medicine/refs/heads/main/rules/ncbi-e-utilities-rules.yml
NaftikoCapability
https://raw.githubusercontent.com/api-evangelist/united-states-national-library-of-medicine/refs/heads/main/capabilities/biomedical-literature-research.yaml