> ## Documentation Index
> Fetch the complete documentation index at: https://docs.knotapi.com/llms.txt
> Use this file to discover all available pages before exploring further.

# OTP_REQUIRED

> Fired when a user needs to enter an OTP code to login to a merchant for the 1st time.

Fired when a user needs to enter an OTP code to login to a merchant for the 1st time.


## OpenAPI

````yaml /api-reference/openapi.json webhook otp_required
openapi: 3.1.0
info:
  title: Knot API
  description: An API to interact with the Knot merchant connectivity platform.
  version: 1.0.0
servers:
  - url: https://development.knotapi.com
    description: Development server
security:
  - basicAuth: []
paths: {}
components:
  securitySchemes:
    basicAuth:
      type: http
      scheme: basic
      description: >-
        Basic authentication header of the form `Basic <encoded-value>`, where
        `<encoded-value>` is the base64-encoded string `username:password`. Use
        your `client_id` as the `username` and your `secret` as the `password`
        value.

````