OpenData - API: Description and User Guide
opendata.bankofgreece.gr is the open data portal of Bank of Greece. It provides the researchers and the public with access to statistical datasets in machine-readable format. Data collection, processing and publication is based on the use of international standards for open data.
API Guide
API is organized around REST. With the APIs, you can have access to all Bank of Greece datasets, quickly and easily, to build your applications.
Our API has predictable resource-oriented URLs for every dataset. Accepts only GET method requests, without a body, and allows specific parameters in the URL to customize results. Returns JSON-encoded responses, using standard HTTP response codes, and no authentication is required.
On every dataset's page, there is an option "Get dataset with the use of API", through which, can see a code snippet with the endpoint and an example of how to call it.
const requestOptions = {method: "GET"};fetch("https://ods.opendata.bankofgreece.gr/api/OfficeRentIndex", requestOptions).then((response) => response.text()).then((result) => console.log(result)).catch((error) => console.error(error));
Authentication
Our API functions without any authentication, and all requests are publicly accessible. All requests are GET, returning JSON format.
curl --request GET https://ods.opendata.bankofgreece.gr/api/OfficePriceIndex
Errors
The API uses standard HTTP response codes to indicate whether an API request was successful or failed.
- Codes in the 2XX range signify a successful request.
- Codes in the 4XX range indicate an error due to issues with the information provided (for example, if the query parameters are invalid).
- Codes in the 5XX range represent errors related to our servers.
Each response includes a message parameter that provides a brief explanation of the reported error.
200 OK Everything worked as expected.400 Bad Request: The request was unacceptable, often due to a missing required parameter.402 Request Failed: The parameters were valid, but the request failed.403 Forbidden: The API key doesn’t have permissions to perform the request.404 Not Found: The requested resource doesn’t exist.500, 502, 503, 504 Server Errors: Something went wrong on Stripe’s end. (These are rare.)
Request Parameters
All API methods share a common structure and accept any combination of the following parameters: $select, $filter, $orderby, $first, $after.
- $select: A comma-separated list of fields to return in the response.
- $filter: An OData expression (an expression that returns a boolean value) using the entity's fields to retrieve a subset of the results.
- $orderby: Uses a comma-separated list of expressions to sort response items. Add 'desc' for descending order, otherwise it's ascending by default.
- $first: An integer value that specifies the number of items to return. Default is 100. To retrieve all data you can use -1 value (restrictions may be applied).
- $after: An opaque string that specifies the cursor position after which results should be returned.
Requesthttps://ods.opendata.bankofgreece.gr/api/DataSets?$select=DataSetNameEN,FrequencyEN,DataSetID,OdiDataSetID&$filter=DataSetID%20gt%20177&$first=1&$after=W3siRW50aXR5TmFtZSI6IkRhdGFTZXRzIiwiRmllbGROYW1lIjoiRGF0YVNldElEIiwiRmllbGRWYWx1ZSI6MTc4LCJEaXJlY3Rpb24iOjB9XQ==Response{"value": [{"DataSetNameEN": "Retail Rent Index","FrequencyEN": "Semiannual","DataSetID": 179,"OdiDataSetID": 221141}],"nextLink": "https://ods.opendata.bankofgreece.gr/api/DataSets?$select=DataSetNameEN,FrequencyEN,DataSetID,OdiDataSetID&$filter=DataSetID%20gt%20177&$first=1&$after=W3siRW50aXR5TmFtZSI6IkRhdGFTZXRzIiwiRmllbGROYW1lIjoiRGF0YVNldElEIiwiRmllbGRWYWx1ZSI6MTc5LCJEaXJlY3Rpb24iOjB9XQ=="}
Pagination
All API requests return a maximum of 100 items per call, divided into pages. In every response, there exists a "nextLink" parameter, which includes the subsequent call that should be made to get the next items.
Parameters
-
$first, optional, default is 100
This specifies a limit on the number of objects to return, ranging between 1 and 100
-
$after, optional string
It is used in pagination. $after is a parameter that defines your place in the list.
Requesthttps://ods.opendata.bankofgreece.gr/api/Categories?$first=3Response{"value": [{"CategoryID": 1,"ParentCategoryID": null,"CategoryNameGR": "Νομισματική Οικονομία","CategoryNameEN": "Monetary Economics","DescriptionGR": "Νομισματική Οικονομία Περιγραφή","DescriptionEN": "Monetary Economics Description","IconUrl": "/PublishingImages/OpenData/category-icon-06.png","DisplayOrder": 1},{"CategoryID": 2,"ParentCategoryID": null,"CategoryNameGR": "Αγορά Ακινήτων","CategoryNameEN": "Real Estate Market","DescriptionGR": "Αγορά Ακινήτων","DescriptionEN": "Real Estate Market","IconUrl": "/PublishingImages/OpenData/BUTTONS%20pre%20press%202-02.png","DisplayOrder": 2},{"CategoryID": 3,"ParentCategoryID": null,"CategoryNameGR": "Δημόσια Οικονομικά","CategoryNameEN": "Public Finance","DescriptionGR": "Δημόσια Οικονομικά","DescriptionEN": "Public Finance","IconUrl": "/PublishingImages/OpenData/BUTTONS%20pre%20press%202-03.png","DisplayOrder": 3}],"nextLink": "https://ods.opendata.bankofgreece.gr/api/Categories?$first=3&$after=W3siRW50aXR5TmFtZSI6IkNhdGVnb3JpZXMiLCJGaWVsZE5hbWUiOiJDYXRlZ29yeUlEIiwiRmllbGRWYWx1ZSI6MywiRGlyZWN0aW9uIjowfV0="}
Categories
This request returns information for one or more categories or subcategories with their metadata.
curl --request GET https://ods.opendata.bankofgreece.gr/api/Categoriescurl --request GET https://ods.opendata.bankofgreece.gr/api/Categories/CategoryID/{CategoryID}
Datasets
This request returns information for one or more datasets and their metadata.
curl --request GET https://ods.opendata.bankofgreece.gr/api/DataSetscurl --request GET https://ods.opendata.bankofgreece.gr/api/DataSets/DataSetID/{DataSetID}
Dataset-Categories endpoint
This request returns the relation between datasets and categories.
curl --request GET https://ods.opendata.bankofgreece.gr/api/DataSetCategoriescurl --request GET https://ods.opendata.bankofgreece.gr/api/DataSetCategories/DataSetId/{DataSetId}/CategoryId/{CategoryId}
DataMappings endpoint
Some datasets have indexes with no numerical values. This request returns all mappings for those indexes.
curl --request GET https://ods.opendata.bankofgreece.gr/api/DataMappingscurl --request GET https://ods.opendata.bankofgreece.gr/api/DataMappings/DataMappingID/{DataMappingID}
Dataset-Columns endpoint
This request returns the relation between datasets and every column - index, with all its metadata.
curl --request GET https://ods.opendata.bankofgreece.gr/api/DataSetColumnscurl --request GET https://ods.opendata.bankofgreece.gr/api/DataSetColumns/DataSetColumnID/{DataSetColumnID}
Data retrieval example
Below is an example of data usage of the API
- We should obtain information about the available datasets
https://ods.opendata.bankofgreece.gr/api/DataSets - We focus on the DataSet "Retail Rent Index" with DataSetID=179 and keep the DataSet identifier DataSetName
https://ods.opendata.bankofgreece.gr/api/DataSets/DataSetID/179 - From the Frequency we understand that our data is Semiannual
- We retrieve all the indicators that interest us for this specific DataSet
https://ods.opendata.bankofgreece.gr/api/DataSetColumns?$filter=DataSetID eq 179 - We may find an interest of using the ReferenceDate along with the RetailRentIndexAthens index i.e. "Retail rent index Athens"
- Finally, we download all the data for this DataSet based on the DataSetName we had previously, and request the index that interests us, as well as the reference period
https://ods.opendata.bankofgreece.gr/api/RetailRentIndex?$first=-1&$select=ReferenceDate,RetailRentIndexAthens - If we are interested in the current latest data (no vintages) then we change the above call to:
https://ods.opendata.bankofgreece.gr/api/RetailRentIndex?$first=-1&$select=ReferenceDate,RetailRentIndexAthens&$filter=ValidUntil eq null