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Whitepaper
For security reasons, some of our Web UI components and SDK methods require a so-called connect token to authorize actions that modify user data. Specifically, you will need to provide a connect token for the following: A connect token is a short-lived, single-use token that securely ties a user’s context (e.g., which account is being updated) to a particular action (such as passkey creation, listing, or deletion). Whenever a flow needs to safely reference a specific user’s account for passkey management, a connect token is required. These tokens are created on your server (server-to-server via the Corbado Backend API) and then passed to the relevant front-end component or SDK method.
  1. Frontend requests a connect token: Your web or native/mobile application makes a secure API call to your backend to request a connect token.
  2. Backend generates a connect token: Your backend makes a secure API call to Corbado’s /v2/connectTokens endpoint (see API Reference). This call identifies the user (for example, through a customerIdentifier) and specifies the intended action ("passkey-append", "passkey-list", or "passkey-delete").
  3. Token includes user-specific data: The response from Corbado includes a unique connect token (e.g., ctk1_sxmexzS7RFBaJSA4V4kBFPs45bkxMK). This token tells the Corbado Web UI Component or SDK method precisely which user and action it is authorized for (e.g., “create a new passkey for user 123”).
  4. Frontend consumes the connect token: On the frontend or native/mobile application, the Corbado Web UI Component or SDK method receives the token and initiates the passkey flow. During this process, Corbado checks the token’s validity.
  5. Short-lived & single use: Each connect token expires after a short period (configurable in Corbado’s systems) and is valid for one passkey operation (e.g., a single passkey creation). Once expired or used, it cannot be reused. This design helps prevent replay attacks and unauthorized reuse.
In summary, every time a passkey management flow runs (like passkey creation or passkey deletion), your backend will need to generate a connect token for the specific user and action.
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