diff --git a/v2/openapi/fb-collateral-api.yaml b/v2/openapi/fb-collateral-api.yaml
new file mode 100644
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+++ b/v2/openapi/fb-collateral-api.yaml
@@ -0,0 +1,31 @@
+openapi: 3.0.0
+info:
+  title: 'Fireblocks Collateral API'
+  description: >
+    This API is implemented by Fireblocks and provides collateral-related
+    endpoints for off-exchange workflows. Unlike the provider APIs in this
+    project, which are implemented by external providers, this API is served
+    by Fireblocks and defines the endpoints providers interact with.
+  version: 0.0.1
+
+tags:
+  - name: collateral
+    description: Endpoints used by external providers (exchanges) calling Fireblocks for off-exchange collateral flows.
+
+x-path-params:
+  EntityIdPathParam: { $ref: './fb-provider-api.yaml#/components/parameters/EntityIdPathParam' }
+  SubAccountIdPathParam: { $ref: './fb-provider-api.yaml#/components/parameters/SubAccountIdPathParam' }
+
+x-header-params:
+  X-FBAPI-KEY: { $ref: './fb-provider-api.yaml#/components/parameters/X-FBAPI-KEY' }
+  X-FBAPI-SIGNATURE: { $ref: './fb-provider-api.yaml#/components/parameters/X-FBAPI-SIGNATURE' }
+  X-FBAPI-NONCE: { $ref: './fb-provider-api.yaml#/components/parameters/X-FBAPI-NONCE' }
+  X-FBAPI-TIMESTAMP: { $ref: './fb-provider-api.yaml#/components/parameters/X-FBAPI-TIMESTAMP' }
+
+x-responses:
+  BadRequestResponse: { $ref: './fb-provider-api.yaml#/components/responses/BadRequestResponse' }
+  UnauthorizedResponse: { $ref: './fb-provider-api.yaml#/components/responses/UnauthorizedResponse' }
+  ErrorResponse: { $ref: './fb-provider-api.yaml#/components/responses/ErrorResponse' }
+
+paths: {}
+components: {}