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Connect your app to your users’ merchant accounts

Update cards on file, retrieve SKU-level transactions, and manage subscriptions at merchants like Amazon, Netflix, and Uber with one SDK and API.

Quickstart

Get your API keys from the Knot Dashboard, or contact Knot to get access.

The Knot SDK showing a list of merchants to choose from
Card on file

CardSwitcher

Update a user’s card on file at merchants like Amazon, Netflix, and Uber.

Vaulting

Set a digital wallet as the default payment method at merchants.
Merchant data

SubscriptionManager

Retrieve subscriptions and bills, and cancel subscriptions server-side.

TransactionLink

Retrieve SKU-level transaction data from a user’s merchant accounts.

Detect

Identify which merchant accounts a user has to personalize your app.
Install Knot skills
Install the MCP server

Skills

Step-by-step integration guides for your coding agent.

MCP server

Search Knot’s docs from Claude Code, Codex, VS Code, or Cursor.

llms.txt

A machine-readable index of every docs page.

iOS

Android

React Native

Flutter

Web

Webhooks

Receive and verify webhook events from Knot.

Launch checklist

Everything to confirm before going live.

Authentication

Authenticate API requests with your client_id and secret.

Knot Dashboard

Manage API keys, webhooks, and team members.