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Stripe's OpenAPI Specification

This repository contains OpenAPI specifications for Stripe's API.

Files can be found in the openapi/ directory:

  • spec3.{json,yaml}: OpenAPI 3.0 spec matching the public Stripe API.
  • spec3[.java].sdk.{json,yaml}: Expanded OpenAPI 3.0 spec intended for Stripe-internal use.
    • Contains special annotations, deprecated endpoints, and pre-release features specifically intended to support generating Stripe API libraries. Users should use the spec3.{json,yaml} variant instead.
  • fixtures3.{json,yaml}: Test fixtures for resources in spec3. See below for more information.

We used to support OpenAPI 2.0, but have since deprecated its use, and it's no longer receiving updates. It will still be available in DEPRECATED_openapi for the next few months:

  • spec2.{json,yaml}: OpenAPI 2.0 spec. No longer receiving updates. Deprecated in favor of spec3.
  • fixtures2.{json,yaml}: Test fixtures for resources in spec2.

Vendor Extensions

The specification ships with a few vendor-specific fields to help represent information in ways that are difficult in OpenAPI by default.

x-expandableFields

Resources include an x-expandableFields that contains a list of fields that are expandable by making an API request with an expand parameter. See expanding objects.

For example:

definitions:
  ...
  charge:
    ...
    x-expandableFields:
    - balance_transaction

x-expansionResources

Any expandable field within a resource contains a set of references to the resources that it might be expanded to.

For example:

definitions:
  ...
  charge:
    properties:
      ...
      balance_transaction:
        description: ID of the balance transaction that describes the impact of this
          charge on your account balance (not including refunds or disputes).
        type:
        - string
        x-expansionResources:
          oneOf:
          - "$ref": "#/definitions/balance_transaction"

x-polymorphicResources

Some API responses are "polymorphic" in that they might return multiple types of resources which is a case that OpenAPI can't handle. In these cases the spec will reference a "synthetic" resource which is an aggregate of the properties common to all the possible resources. It will also include the field x-polymorphicResources which references those resources more precisely.

For example:

definitions:
  ...
  external_account_source:
    properties:
      ...
    x-polymorphicResources:
      oneOf:
      - "$ref": "#/definitions/bank_account"
      - "$ref": "#/definitions/card"

x-resourceId and Fixtures

Resources include x-resourceId which is a canonical name for each resource. It can be used in conjunction with openapi/fixtures{2,3}.{json,yaml} to look up a sample representation (otherwise known as a "fixture") of the resource.

For example:

# spec.yaml
---
definitions:
  ...
  charge:
    ...
    x-resourceId: charge

# fixtures.yaml
---
invoice_line_item:
  ...

Updates

Please make updates to the script included in bin to help maintain consistency and commit cleanliness (search JIRA for full instructions):

bin/update

Development

Run the test suite:

make