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Fiserv Authorizations API

Create and manage transaction authorizations.

Fiserv Authorizations API is one of 27 APIs that Fiserv publishes on the APIs.io network, described by a machine-readable OpenAPI specification.

Tagged areas include Authorizations. The published artifact set on APIs.io includes an OpenAPI specification and API documentation.

This API exposes 2 operations across 2 paths, and defines 4 schemas. It is described by OpenAPI 3.1.0, at version 1.0.0.

Requests are made against 2 base URLs: https://cert.api.fiservapps.com, https://prod.api.fiservapps.com.

2 operations 2 paths 4 schemas 2 POST

Metadata

The identity and technical contract details declared by the specification.

Specification
OpenAPI 3.1.0
API Version
1.0.0
Servers
https://cert.api.fiservapps.com
https://prod.api.fiservapps.com
Authentication
HTTP Bearer
Terms of Service
Resource Areas
1

Authentication & Security 1

Fiserv Authorizations API declares 1 security scheme for authenticating requests. It accepts HTTP bearer tokens (JWT) (bearerAuth). By default, every request must be authenticated.

  • bearerAuth — OAuth 2.0 Bearer token for API authentication.

Paths & Operations 2

Across 2 paths, the API surfaces 2 operations — 2 POST. Each is listed below with its method, path, parameters, and response codes.

Authorizations 2

Create and manage transaction authorizations.

POST
/v1/authorizations
Fiserv Create an authorization
createAuthorization body → 201400401
POST
/v1/authorizations/{authorizationId}/cancel
Fiserv Cancel an authorization
cancelAuthorization 1 param → 200401404

Schemas 4

The contract defines 4 schemas that model the data the API accepts and returns. The most detailed are AuthorizationRequest (5 properties), ErrorResponse (3 properties), AuthorizationResponse (3 properties), AuthorizationCancelResponse (2 properties). Each schema is shown below with its type and property counts.

AuthorizationResponse
object
Response body for authorization creation.
3 properties
AuthorizationCancelResponse
object
Response body for authorization cancellation.
2 properties
ErrorResponse
object
Standard error response.
3 properties
AuthorizationRequest
object
Request body for creating a transaction authorization.
5 properties 2 required

Specification

The full machine-readable OpenAPI contract behind this narrative.

Source

fiserv-authorizations-api-openapi.yml Raw ↑

Other APIs Fiserv publishes across the network.

Fiserv Payment Events
Fiserv 3-D Secure API
Fiserv Accounts API
Fiserv Authorization API
Fiserv BIN API
Fiserv Cancels API
Fiserv Capture API
Fiserv Captures API
Fiserv Cards API
Fiserv Charges API
Fiserv Funding API
Fiserv Inquire API
Where this information came from

This is an independent, third-party profile of Fiserv Authorizations API, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.

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