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Affirm Promos API

Operations for retrieving dynamic promotional messaging and financing term information to display on merchant web pages.

Affirm Promos API is one of 11 APIs that Affirm publishes on the APIs.io network, described by a machine-readable OpenAPI specification.

Tagged areas include Promos. The published artifact set on APIs.io includes an OpenAPI specification.

This API exposes 1 operation across 1 path, and defines 6 schemas. It is described by OpenAPI 3.2.0, at version 2.0.

Requests are made against a single base URL, https://www.affirm.com/api/promos/v2/{public_api_key}.

1 operations 1 paths 6 schemas 1 GET

Metadata

The identity and technical contract details declared by the specification.

Specification
OpenAPI 3.2.0
API Version
2.0
Base URL
https://api.affirm.com
Terms of Service
Resource Areas
1

Paths & Operations 1

Across 1 path, the API surfaces 1 operation — 1 GET. Each is listed below with its method, path, parameters, and response codes.

Promos 1

Operations for retrieving dynamic promotional messaging and financing term information to display on merchant web pages.

GET
/
Affirm Get Promotional Messaging
getPromo 7 params → 200400401

Schemas 6

The contract defines 6 schemas that model the data the API accepts and returns. The most detailed are PromoContent (8 properties), FinancingTerm (7 properties), PromoConfig (7 properties), Error (3 properties). Each schema is shown below with its type and property counts.

OfferContent
object
Available financing offer details for the requested purchase amount.
3 properties
PromoConfig
object
Internal configuration data returned with the promo response.
7 properties
FinancingTerm
object
A single available financing term option including APR and payment details.
7 properties
PromoContent
object
Promotional messaging content including ALA text and modal content.
8 properties
Error
object
Standard error response returned by the Affirm API.
3 properties
PromoResponse
object
Response containing promotional messaging content and financing offer details for the requested purchase amount.
2 properties

Specification

The full machine-readable OpenAPI contract behind this narrative.

Source

affirm-promos-api-openapi.yml Raw ↑

Other APIs Affirm publishes across the network.

Affirm Checkout API
Affirm Charges API
Affirm Transactions API
Affirm Authorization API
Affirm Cards API
Affirm Checkouts API
Affirm Disputes API
Affirm Settlement Events API
Affirm Transaction Events API
Affirm Transactions API
Where this information came from

This is an independent, third-party profile of Affirm Promos 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.

The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.

Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.

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