Checkout API
Checkout API as documented publicly: 4 operations. Contract generated from the documentation by API Evangelist (2026-10-08); not the provider's own document.
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OpenAPI Specification
openapi: 3.1.0
info:
title: Checkout API
version: '2026-10-08'
description: 'GENERATED FROM DOCUMENTATION by API Evangelist on 2026-10-08: 4 operation(s) read from 3 public documentation page(s) (each operation
names its page in x-source). This is not the provider''s published contract; Checkout has published no machine-readable contract that the
pipeline could find. Engine: local.'
x-evidence-tiers:
code-example: 4
documentation: 0
pages-with-code: 3
pages-read: 3
x-generated-from: documentation
x-provenance: generated
x-authored-by: API Evangelist
x-generated: '2026-10-08'
x-generator: generate-contract-from-docs.py
x-engine: local
x-sources:
- https://www.checkout.com/docs/resources/api-authentication/api-keys
- https://api-reference.checkout.com
- https://www.checkout.com/docs/risk-management/3d-secure/sessions
paths:
/:
post:
operationId: post
tags:
- Api
summary: POST /
x-source: https://api-reference.checkout.com
requestBody:
required: true
content:
application/json:
schema:
$ref: '#/components/schemas/PostRequest'
responses:
'201':
description: Success (status as documented)
x-evidence:
kind: code-example
language: curl
snippet: "curl --location --request POST 'https://{prefix} .api .checkout .com /{{ path }}' --header ' Content -Type: application/json\
\ ' --header ' Accept: application/json ' --header ' Authorization: Bearer {{SecretApiKey}}' --data-raw '{\n\"amount\": 10000 ,\n\
\ \"currency\" : \"USD\" ,\n \"reference\" : \"Visa-USD-Test\" ,\n...\n}'\n Security Scheme Type: API Key \n Header parameter name:\
\ Authorization \n OAuth \n Your O"
/connect/token:
get:
operationId: get_connect_token
tags:
- Connect
summary: GET /connect/token
x-source: https://api-reference.checkout.com
responses:
'200':
description: Success (status as documented)
x-evidence:
kind: code-example
language: curl
snippet: "curl --location 'https://{prefix}.access.checkout.com/connect/token' --header 'Content-Type: application/x-www-form-urlencoded'\
\ -- data -urlencode 'grant_type=client_credentials' -- data -urlencode 'client_id=ack_...' -- data -urlencode 'client_secret=...'\
\ \n The token server returns a Bearer access_token in JSON Web Token (JWT) format. Use this token in the Authorization header of your\
\ API req"
post:
operationId: post_connect_token
tags:
- Connect
summary: POST /connect/token
x-source: https://www.checkout.com/docs/risk-management/3d-secure/sessions
responses:
'201':
description: Success (status as documented)
x-evidence:
kind: code-example
language: curl
snippet: 'curl --location --request POST ''https://{prefix}.access.sandbox.checkout.com/connect/token'' \ 2 --header ''Content-Type: application/x-www-form-urlencoded''
\ 3 --data-urlencode ''grant_type=client_credentials'' \ 4 --data-urlencode ''client_id=ack_3kgxgdj773yubf4sfmiht3r4h4'' \ 5 --data-urlencode
''client_secret=PddTMk1FBjk1MDQHtBt1U8cHjZvS+Guc80NmcUHp3pHevOpt7EgYkT/DWae7gnOTlF6kPCPo+RZEu9xut/5VWA=='' Re'
/payments:
post:
operationId: post_payments
tags:
- Payments
summary: POST /payments
x-source: https://www.checkout.com/docs/resources/api-authentication/api-keys
responses:
'201':
description: Success (status as documented)
x-evidence:
kind: code-example
language: curl
snippet: 'curl --location --request POST ''https://{prefix}.api.sandbox.checkout.com/payments/'' \ 2 --header ''Content-Type: application/json''
\ 3 --header ''Authorization: Bearer sk_sbox_wjvrysklsqjmrhn3yoexnshsl72'' \ 4 --data-raw ''{ 5 "source": { 6 "type": "card", 7 "number":
"4242424242424242", 8 "expiry_month": 12, 9 "expiry_year": 2025 10 }, 11 "amount": 100, 12 "currency": "EUR", 13 "reference": "ORD-175'
components:
schemas:
PostRequest:
type: object
properties:
amount:
type: integer
currency:
type: string
reference:
type: string
securitySchemes:
bearer:
type: http
scheme: bearer
security:
- bearer: []
tags:
- name: Api
- name: Connect
- name: Payments