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PMC Utilities
OAI Service
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PMC Open Archives (OAI) Service The PubMed Central OAI service (PMC-OAI) provides access to metadata of all items in the PubMed Central (PMC) archive, as well as to the full text of a subset of these items. Copyright Most of the items in this archive are copyright protected, with copyright held by the author(s) or the depositing journal. In general, the OAI service can not be used to retrieve the full text of articles in PMC. The only exceptions to this policy are for articles that are in the public domain and those that are made available under an Open Access provision (as defined in the Open Access Subset). See the PMC copyright notice for more information. Using the PMC-OAI Service The base URL for the service is: http://www.pubmedcentral.nih.gov/oai/oai.cgi High-Volume Retrievals If you are using a script that makes more than 100 requests of any kind, please run it outside of the PMC system's peak hours. Do not make more than one request every 3 seconds, even at off-peak times. Peak hours are Monday to Friday, 5:00 AM to 9:00 PM, U.S. Eastern time. Access to Full Text Some PMC journals allow harvesting of the full text of all items, others allow it for only some items, and many do not allow it at all. See the PMC Open Access Subset for specifics. Supported Data Formats Records may be retrieved from the PMC archive in one of the following formats:
Automatic Segmentation of Large Result Sets If a ListIdentifiers request results in more than 500 hits,
PMC-OAI will return the first 500 with a <resumptionToken> that can be used to get the remaining items. Contact Us |