Affirm

Affirm is a buy-now-pay-later platform offering installment loans at point-of-sale via merchant SDKs and direct APIs. Public Series A through F-funded company.

3 APIs 0 Features

FintechBNPLLendingPaymentsConsumer

APIs

Affirm Checkout API

Initialize and authorize Affirm checkout flows for online merchants.

Affirm Charges API

Capture, void, and refund Affirm charges; read transaction details.

Affirm Transactions API

Read transactions, settlements, and disputes.

Event Specifications

Affirm Webhooks

Affirm uses webhooks to notify merchant endpoints in real time when events occur during the customer checkout and prequalification flows. Webhooks are available to Key and Enter...

ASYNCAPI

Semantic Vocabularies

Affirm Checkout Context

11 classes · 50 properties

JSON-LD

Affirm Context

0 classes · 9 properties

JSON-LD

Affirm Direct Context

3 classes · 23 properties

JSON-LD

Affirm Disputes Context

3 classes · 21 properties

JSON-LD

Affirm Promos Context

6 classes · 30 properties

JSON-LD

Affirm Transactions Context

4 classes · 22 properties

JSON-LD

API Governance Rules

Affirm API Rules

35 rules · 16 errors 17 warnings 2 info

SPECTRAL

Resources

👥

GitHubOrganization

Sources

aid: affirm
url: https://raw.githubusercontent.com/api-evangelist/affirm/refs/heads/main/apis.yml
name: Affirm
kind: company
description: Affirm is a buy-now-pay-later platform offering installment loans at point-of-sale via merchant SDKs and direct
  APIs. Public Series A through F-funded company.
image: https://kinlane-productions.s3.amazonaws.com/apis-json/apis-json-logo.jpg
tags:
  - Fintech
  - BNPL
  - Lending
  - Payments
  - Consumer
created: '2026-05-08'
modified: '2026-05-08'
specificationVersion: '0.19'
apis:
  - name: Affirm Checkout API
    description: Initialize and authorize Affirm checkout flows for online merchants.
    humanURL: https://docs.affirm.com/developers
    baseURL: https://api.affirm.com
    tags:
    - Checkout
    - BNPL
    properties:
    - type: Documentation
      url: https://docs.affirm.com/developers
  - name: Affirm Charges API
    description: Capture, void, and refund Affirm charges; read transaction details.
    humanURL: https://docs.affirm.com/developers
    baseURL: https://api.affirm.com
    tags:
    - Charges
    - Payments
    properties:
    - type: Documentation
      url: https://docs.affirm.com/developers
  - name: Affirm Transactions API
    description: Read transactions, settlements, and disputes.
    humanURL: https://docs.affirm.com/developers
    baseURL: https://api.affirm.com
    tags:
    - Transactions
    - Settlements
    properties:
    - type: Documentation
      url: https://docs.affirm.com/developers
common:
  - type: GitHubOrganization
    url: https://github.com/Affirm
  - type: LinkedIn
    url: https://www.linkedin.com/company/affirm
  - type: Website
    url: https://www.affirm.com/
  - type: Plans
    url: plans/affirm-plans-pricing.yml
  - type: RateLimits
    url: rate-limits/affirm-rate-limits.yml
  - type: FinOps
    url: finops/affirm-finops.yml
  - type: LLMsTxt
    url: https://docs.affirm.com/llms.txt
maintainers:
  - FN: Kin Lane
    email: [email protected]