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API Documentation for the betterplace platform
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The API Version 4

This is the latest API for It's a REST-style API that returns JSON for serialization. It incorporates some ideas from hypermedia apis like the link-strukture.

Please provide feedback

Please don't hesitate to provide any feedback about the API and this documentation at

Mailing list for service announcements

Please send an email to to subscribe to the api-v4-mailing list to receive service announcements about updates and scheduled downtimes.

Table of content

  1. General information ↓ below

    1. Request Parameter Format ↓ below
    2. Addressing the locale of a resource ↓ below
    3. Pagination ↓ below
    4. Picture formats ↓ below
    5. HTTP Status Codes ↓ below
    6. Error Messages ↓ below
    7. Changelog
    8. Known issues ↓ below
    9. API Client Libraries ↓ below
    10. Code examples ↓ below
    11. Example apps ↓ below
  2. Public API

    1. Projects
      1. Projects List and Search
      2. Project Details
      3. Project Needs List
      4. Project Need Details
      5. Project Blog Posts List
      6. Project Blog Post Details
      7. Project Opinions List
      8. Project Opinion Details
      9. Project Pictures List
      10. Project Picture Details
    2. Fundraising Events
      1. Fundraising Events List and Search
      2. Fundraising Events Details
      3. Fundraising Event Opinions List
      4. Fundraising Event Opinion Details
      5. Fundraising Event Featured Projects List
      6. Fundraising Event Forwarding List
    3. Volunteering
      1. Volunteering List and Search
      2. Volunteering Details
    4. Organisations
      1. Organisations List
      2. Organisation Details
    5. MatchingFunds
      1. MatchingFunds List
      2. MatchingFund Details
      3. MatchingFund Projects List
    6. FundraisingChallenge
      1. Fundraising Challenge Contest Details
      2. Fundraising Challenge Contest Results List
  3. Client API ↓ below

    1. Client Projects ↓ below
    2. Client Authentication ↓ below
    3. Client Details
    4. Client Project Statistics
    5. Client Fundraising Event Statistics
    6. Client Donations List
    7. Client Donor Contact Data
    8. Client Donation Pledges :lock:
    9. Client Mailing Subscribtions :lock:
    10. Client Projects List and Search –  See client section and "Client Projects"
    11. Client Project Details –  See client section and "Client Projects"
    12. Client Blog Posts List – See client section
    13. Client Project Opinions List – See client section
    14. Client Tags List
    15. Client-Project Tags List
    16. User Contact Data Details :lock:
  4. Organisation API

    1. ThirdPartyApp custom donation form for organisations

General information

  • The API is https only, all non-https requests will be redirected accordingly
  • The response/response format is JSON
  • We support Cross-origin resource sharing (CORS), so no proxy or JSONP is required
  • Authentication: Most api calls are public. Some client API feature require authentication. Learn more
  • Users, Companies and Portals are not part of the API at this moment.

Request parameter format

The order and facets request parameters accept multiple key-value-parameter. We use the same convention as the Google Static Maps API V2.

Example: foo:bar|lorem:ipsum

This way you may specify a primary and secondaray sort order like this order=rank:DESC|created_at:DESC, which will cause higher ranked objects to come first and more recently created objects come first if they have equal rank.

  • Split key and value by a colon :
  • Split multiple key-value-parameter by a pipe | (%7C)
  • URL encode all params, so the Pipe becomes %7C
  • Note that for readability-reasons we don't URL encode the params in this documentation

Addressing the locale of a resource

  • Some resources offer translated content. To access the translated content you need to set the lang-prefix in the API-URL. api_v4/de/projects/… returns the german translations while api_v4/en/projects/… return the english translated content. Not translated content will fallback to the original content language. We currently support content with german or english translations.
  • The same pattern applies to creating resources for a specific language.


All list requests can be paginated with the following parameters.

Parameter Description Default
page Used to paginate through the list 1
per_page The number of entries per page 20

The following attributes are returned in all list view responses:

Attribute Description Example
total_entries Count of all entries 23
offset The number of entries that are skipped before the current listing begins, = max(page - 1, 0) * per_page 0
total_pages Count of all pages, based on per_page 42
current_page What page we are on 1
per_page Number of entries per page 20

Picture formats

Please note that all over the API only the original version will always be available. There are more image versions for different entities, e.g. fill_960x500 for projects. You can use these versions, but they might change in the future!

To avoid problems stay tuned and subscribe to the Mailing list for service announcements ↑.

HTTP Status Codes

The following HTTP result codes can be returned:

Error Messages

If an error occurs, a JSON response messages is returned with a name and reason (optional). Clients that use the will also see a backtrace and message property.


  "name": "GeneralError",
  "status": "not_found",
  "status_code": 404,
  "reason": "Record Not Found",
  "backtrace": [
    "/path/to/file:23:in 'method'",
    "/path/to/file:42:in 'method2'"
  "message": "Couldn't find Project with id=666",

If errors occur during the creation process of a resource the answer will contain helpful information about how to resolve the issues. Please note that this information is not meant to be used in your application directly but only for your development process. We might change the specs for the errors-response at any time without further notice.

Example with validation errors:

  "name": "GeneralError",
  "status": "unprocessable_entity",
  "status_code": 422,
  "reason": "Cannot Process Submitted Data",
  "backtrace": [
    "/path/to/file:23:in 'method'",
    "/path/to/file:42:in 'method2'"
  "message": "First name Dies ist ein Pflichtfeld",
  "errors": { "first_name": [ "Dies ist ein Pflichtfeld." ] },

Known issues

Please contact for more information

  • Documentation: Not all resources have a documentation-url as part of the json
  • Documentation: The response-table does not show the root-documentation for response-elements with sub-elements (for example is documented but carrier is not)
  • Blogposts: There is no way yet to filter BlogPosts from PayoutBlogPost

API Client Libraries

While we currently officially do not offer any client api libraries Duilio Ruggiero implemented the prototypical ruby client bettery.

We would love to hear from you if you plan to use/extend bettery or implement your own client and publish the code.

Code examples

Example apps

Client API

This API provides special features for companies and organisations as part of the services offered by our betterplace solutions. This client access requires a special contract. Please contact us with your questions.

Client Projects

Clients projects are projects on that are associated with a client-user. This way clients can control what projects are visible on their plattform.

Some URLs have a special scope for clients. Examples:

  • /clients/example/projects will only show projects of the example-client
  • /clients/example/tags/rainforest/projects will only show projects of the example-client and tagged with "rainforest".

If you request data for a project that is not part of the client projects, the API will return an HTTP error code 404.

Client Authentication

Some feature of the client API require your authentication.

  • Please use your API Credentials to authenticate with HTTP Basic Authentication username and password.
  • Please use the special scope for clients that is described above.

Username, password and client-scope are provided as part of the contract with our betterplace solutions.

Usage example

The local german newspaper "Trierischer Volksfreund" has it's own donation portal at "Meine Hilfe zählt". All data are pulled from this api. In addition they use the whitelabel donation form, which is another service provides for clients.

API V1, V2, V3 has three deprecated APIs. For more information contact


Learn more about betterplace at

License of this documentation

See the license file.

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