Knot API Documentation

Knot is a merchant connectivity platform that financial institutions and other businesses of all sizes use to connect their applications to the online merchant accounts of their end users. Knot allows your application to read and write data to online merchant accounts for various use cases. CardSwitcher, for example, allows users to quickly and securely update their credit and debit cards on-file with merchants. This allows card issuers to improve and maintain top-of-wallet status across merchants. All integrations to Knot’s platform include two aspects:

1. A client-side SDK integration which handles credential validation, multi-factor authentication, and error handling.
2. A server-side integration to read data from & write data to Knot, as well as receive webhook events.

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Products

• CardSwitcher updates a user’s payment card on file at merchants like Amazon, Netflix, and Uber.
• TransactionLink retrieves historical and ongoing SKU-level transaction data from a user’s merchant accounts.
• SubscriptionManager retrieves subscription and bill data from linked merchant accounts and cancels subscriptions server-side.
• Detect identifies which merchant accounts a user has so you can personalize their experience.
• Vaulting sets a digital wallet as the default payment method at a user’s merchant accounts.
• Shopping creates carts and checks out at merchants directly from your app.

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Developer resources

• Authentication: Authenticate Knot API requests with your client_id and secret.
• API reference and OpenAPI specification: Every Knot API endpoint, with request and response schemas.
• Webhooks: Receive and verify webhook events from Knot.
• SDKs: Knot SDKs for iOS, Android, React Native, Flutter, and Web.
• MCP server and skills: Build a Knot integration with AI tools.
• Knot Dashboard: Manage API keys, webhooks, and team members.
• Contact Knot: Reach Knot sales, support, and press.

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