| as_id_list | Entrez identifier sets |
| check_id_list | Check ID set is well formed |
| check_id_set | Check ID set is well formed |
| check_web_history | Check ID set is well formed |
| efetch | Fetch records from Entrez |
| einfo | Get details about Entrez databases |
| einfo_databases | Get details about Entrez databases |
| elink | ELink API for fetching links between databases |
| elink_map | ELink API for fetching links between databases |
| entrez_api_key | Construct a request to the Entrez API |
| entrez_count | Count the number of entries in an ID set |
| entrez_database | Check ID set is well formed |
| entrez_request | Construct a request to the Entrez API |
| entrez_validate | Look up accessions and other IDs on Entrez |
| epost | Register UIDs with the Entrez history server |
| esearch | Search Entrez databases |
| esummary | Fetch document summaries from Entrez |
| id_list | Entrez identifier sets |
| is_id_list | Entrez identifier sets |
| is_id_set | Entrez identifier sets |
| is_web_history | Entrez identifier sets |
| process | Process API results |
| topic-process | Process API results |
| web_history | Entrez identifier sets |