GET /elink.fcgi
Summary: Link between databases
Operation ID: eLink
Auth: unknown
Operation ID: eLink
Auth: unknown
Description
Retrieves UIDs in one database linked to UIDs in another database.
Parameters (10)
WebEnv
(string, query, optional)
Web environment string
cmd
(string, query, optional, default: neighbor)
Command mode
Constraints: {'enum': ['neighbor', 'neighbor_score', 'neighbor_history', 'acheck', 'ncheck', 'lcheck', 'llinks', 'llinkslib', 'prlinks']}
db
(string, query, optional)
Destination database (omit for all linked databases)
dbfrom
(string, query, required)
Source database
email
(string, query, optional)
Email address for contact
id
(string, query, optional)
Comma-separated UIDs from source database
linkname
(string, query, optional)
Specific link name (e.g., pmc_pubmed, pmc_pmc_cited)
query_key
(string, query, optional)
Query key from previous search
retmode
(string, query, optional, default: xml)
Return mode
Constraints: {'enum': ['xml', 'json']}
tool
(string, query, optional)
Tool name for logging
Examples (3)
| Title | Type | URL | Action |
|---|---|---|---|
| Link PubMed IDs to PMC full text | curl |
https://www.ncbi.nlm.nih.gov/pmc/elink.fcgi?dbfrom=pubmed&db=pmc&id=12345678&id=23456789&retmode=json&email=user@example.com&tool=robustapi |
|
| Find articles citing a PMC article | curl |
https://www.ncbi.nlm.nih.gov/pmc/elink.fcgi?dbfrom=pmc&db=pmc&linkname=pmc_pmc_cited&id=PMC13901&retmode=json&email=user@example.com&tool=robustapi |
|
| Get all database links for a protein | curl |
https://www.ncbi.nlm.nih.gov/pmc/elink.fcgi?dbfrom=protein&id=NP_001300&cmd=neighbor&retmode=json&email=user@example.com&tool=robustapi |
Probe History
Status Codes
| Time | Status | Latency | Size |
|---|---|---|---|
| 2026-03-23 10:35:15.314102 | 404 | 511ms | |
| 2026-03-23 10:25:55.750561 | 404 | 506ms | |
| 2026-03-23 09:23:40.683166 | 404 | 521ms |
Response Changes
| When | Old | New |
|---|---|---|
| 2026-03-23 10:25:55.750561 | 161bdf726c36 |
3db5d6789dbc |
| 2026-03-23 10:35:15.314102 | 3db5d6789dbc |
eeb91af69db7 |