generated: '2026-07-17'
method: searched
source: https://github.com/500px/legacy-api-documentation/blob/master/README.md
docs: https://github.com/500px/legacy-api-documentation/blob/master/authentication/README.md
status: retired
note: >-
  The 500px public API program was discontinued on 2018-06-15. The authentication model below is
  captured from the legacy API documentation for historical reference; live credentials are no
  longer issued.
summary:
  types: [oauth1, apiKey]
  api_key_in: [query]
  oauth_version: 1.0a
schemes:
- name: ConsumerKey
  type: apiKey
  in: query
  parameter: consumer_key
  description: >-
    Public read-only requests (feature streams, public photos, public user profiles) are signed
    with a Consumer Key passed as the consumer_key query-string parameter. No user context.
  sources: [https://github.com/500px/legacy-api-documentation]
- name: OAuth1
  type: oauth1
  flow: 1.0a
  request_token_url: https://api.500px.com/v1/oauth/request_token
  authorize_url: https://api.500px.com/v1/oauth/authorize
  access_token_url: https://api.500px.com/v1/oauth/access_token
  description: >-
    User-scoped requests (uploads, voting, following, private data) use three-legged OAuth 1.0a
    with HMAC-SHA1 request signing.
  sources: [https://github.com/500px/legacy-api-documentation]