GET /elink.fcgi

Web environment from previous esearch.

NCBI API key for increased rate limits.

Command mode: 'neighbor' finds related records, 'neighbor_score' includes scores, 'neighbor_history' stores results, etc.

Constraints: {'enum': ['neighbor', 'neighbor_score', 'neighbor_history', 'acheck', 'ncheck', 'lcheck', 'llinks', 'llinkslib', 'prlinks']}

Target database to find links in.

Source database. Use 'nuccore' for nucleotide.

Constraints: {'enum': ['nuccore']}

Comma-separated list of UIDs to find links for.

Type of identifier.

Specific link name to retrieve (e.g., 'nuccore_gene', 'nuccore_protein').

Query key from previous esearch.

Return format.

Constraints: {'enum': ['xml', 'json']}