The OpenAIRE HTTP API allows developers to access the metadata information space of OpenAIRE+ by performing queries over publications, datasets, and projects. The API is intended for metadata discovery and exploration only, that is it does not give direct access to publication files and it does not provide access to the whole information space: the number of total results returned by one query is limited to 10,000. For accessing the whole information space, developers are encouraged to use the OAI-PMH.

API rate limits:

• no more then 37 concurrent request in total (max 30 per single IP)
• no more than 15 requests/second (in total, not per IP. If this limit is reached, requests will be delayed).

Parameters included in this section can always be specified, regardless the type of entities (metadata about publications, datasets, or projects) you want to retrieve.
To query for publications metadata: http://api.openaire.eu/search/publications
To query for datasets metadata: http://api.openaire.eu/search/datasets
To query for projects metadata: http://api.openaire.eu/search/projects

Common Parameters

Parameter	Option	Description
page	integer	Page number of the search results.
size	integer	Number of results per page.
format	json | xml | csv | tsv	The format of the response. The default is xml.
model	openaire | sygma	The data model of the response. Default is openaire. Model sygma is a simplified version of the openaire model. For sygma, only the xml format is available. The relative XML schema is available here.
sortBy	sortBy=field,[ascending|descending]	The sorting order of the specified field. For the list of sortable fields, please refer to the documentation relative to the specific type of entity you are querying for.
hasECFunding	true | false	If hasECFunding is true gets the entities funded by the EC. If hasECFunding is false gets the entities related to projects not funded by the EC.
hasWTFunding	true | false	If hasWTFunding is true gets the entities funded by Wellcome Trust. The results are the same as those obtained with funder=wt. If hasWTFunding is false gets the entities related to projects not funded by Wellcome Trust.
funder	WT | EC | ARC | ANDS | NSF | FCT | NHMRC	Search for entities by funder.
fundingStream	...	Search for entities by funding stream.
FP7scientificArea	...	Search for FP7 entities by scientific area.
keywords	White-space separated list of keywords.	N/A

Publication specific parameters

Endpoint: http://api.openaire.eu/search/publications

Parameter	Option	Description
sortBy	sortBy=field,[ascending|descending]; 'field' is one of: dateofcollection, resultstoragedate, resultstoragedate, resultembargoenddate, resultembargoendyear, resultdateofacceptance, resultacceptanceyear	The sorting order of the specified field.
doi	Comma separated list of DOIs. Alternatevely, it is possible to repeat the paramater for each requested doi.	Gets the publications with the given DOIs, if any.
openairePublicationID	Comma separated list of OpenAIRE identifiers. Alternatevely, it is possible to repeat the paramater for each requested identifier.	Gets the publication with the given openaire identifier, if any.
fromDateAccepted	Date formatted as YYYY-MM-DD	Gets the publications whose date of acceptance is greater than or equal the given date.
toDateAccepted	Date formatted as YYYY-MM-DD	Gets the publications whose date of acceptance is less than or equal the given date.
title	White-space separated list of keywords.	Gets the publications whose titles contain the given list of keywords.
author	White-space separated list of names and/or surnames.	Search for publications by authors.
openaireProviderID	Comma separated list of identifiers.	Search for publications by openaire data provider identifier. Alternatevely, it is possible to repeat the parameter for each provider id. In both cases, provider identifiers will form a query with OR semantics.
openaireProjectID	Comma separated list of identifiers. Alternatevely, it is possible to repeat the paramater for each provider id. In both cases, provider identifiers will form a query with OR semantics.	Search for publications by openaire project identifier. Alternatevely, it is possible to repeat the parameter for each provider id. In both cases, provider identifiers will form a query with OR semantics.
hasProject	true | false	If hasProject is true gets the publications that have a link to a project. If hasProject is false gets the publications with no links to projects.
projectID	...	The given grant identifier of the project.
FP7ProjectID	...	Search for publications associated to a FP7 project with the given grant number. It is equivalent to a query by funder=FP7&projectID=grantID
OA	true | false	If OA is true gets Open Access publications. If OA is false gets the non Open Access publications

Dataset specific parameters

Endpoint: http://api.openaire.eu/search/datasets

Parameter	Option	Description
sortBy	sortBy=field,[ascending|descending]; 'field' is one of: dateofcollection, resultstoragedate, resultstoragedate, resultembargoenddate, resultembargoendyear, resultdateofacceptance, resultacceptanceyear	The sorting order of the specified field.
doi	Comma separated list of DOIs. Alternatevely, it is possible to repeat the paramater for each requested doi.	Gets the publications with the given DOIs, if any.
openaireDatasetID	Comma separated list of OpenAIRE identifiers. Alternatevely, it is possible to repeat the paramater for each requested identifier.	Gets the publication with the given openaire identifier, if any.
openaireDatasetID	Comma separated list of openaire identifiers	Gets the publication with the given openaire identifier, if any.
fromDateAccepted	Date formatted as YYYY-MM-DD	Gets the datasets whose date of acceptance is greater than or equal the given date.
toDateAccepted	Date formatted as YYYY-MM-DD	Gets the datasets whose date of acceptance is less than or equal the given date.
title	White-space separated list of keywords.	Gets the datasets whose titles contain the given list of keywords.
author	A white-space separated list of names and/or surnames	Search for datasets by authors.
openaireProviderID	Comma separated list of identifiers.	Search for datasets by openaire data provider identifier. Alternatevely, it is possible to repeat the parameter for each provider id. In both cases, provider identifiers will form a query with OR semantics.
openaireProjectID	Comma separated list of identifiers.	Search for publications by openaire project identifier. Alternatevely, it is possible to repeat the parameter for each provider id. In both cases, provider identifiers will form a query with OR semantics.
hasProject	true | false	If hasProject is true gets the datasets that have a link to a project. If hasProject is false gets the datasets with no links to projects.
FP7ProjectID	...	Search for datasets associated to a FP7 project with the given grant number. It is equivalent to a query by funder=FP7&projectID=grantID
OA	true | false	If OA is true gets Open Access datasets. If OA is false gets the non Open Access datasets

Project specific parameters

Endpoint: http://api.openaire.eu/search/projects

Parameter	Option	Description
sortBy	sortBy=field,[ascending|descending]; 'field' is one of: projectstartdate, projectstartyear, projectenddate, projectendyear, projectduration	The sorting order of the specified field.
grantID	Comma separated list of DOIs.	Gets the project with the given grant identifier, if any.
openairePublicationID	Comma separated list of OpenAIRE identifiers.	Gets the publication with the given openaire identifier, if any.
name	White-space separated list of keywords.	Gets the projects whose names contain the given list of keywords.
acronym	N/A	Gets the project with the given acronym, if any.
callID	N/A	Search for projects by call identifier.
startYear	Year formatted as YYYY	Gets the projects that started in the given year.
endYear	Year formatted as YYYY.	Gets the projects that ended in the given year.
participantCountries	Comma separeted list of 2 letter country codes.	Search for projects by participant countries.
participantAcronyms	White space separeted list of acronyms of institutions.	Search for projects by participant institutions.