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

# Request or verify recipient OTP

> Not an integration-key endpoint. Requires the dedicated session/identity flow described in the guide.



## OpenAPI

````yaml /openapi.json post /api/v1/guest/auth
openapi: 3.0.3
info:
  title: DekaSign sandbox and session API
  version: '2026-10-18'
  description: >-
    Management endpoints are sandbox-only and may return SANDBOX_API_DISABLED on
    production hosts. Template authoring and human approval decisions are not
    machine-key APIs. Session routes are separately authenticated. Responses are
    intentionally extensible; narrative guides document key fields. This
    specification does not grant access or enable feature flags.
servers:
  - url: https://{workspace}.dekasign.com
    description: Use the authorized sandbox workspace supplied by your administrator.
    variables:
      workspace:
        default: your-workspace
security: []
paths:
  /api/v1/guest/auth:
    post:
      tags:
        - guest
      summary: Request or verify recipient OTP
      description: >-
        Not an integration-key endpoint. Requires the dedicated session/identity
        flow described in the guide.
      operationId: post_guest_auth
      parameters: []
      requestBody:
        required: true
        content:
          application/json:
            schema:
              oneOf:
                - type: object
                  properties:
                    action:
                      type: string
                      enum:
                        - request_otp
                    email:
                      type: string
                      format: email
                    requestId:
                      type: string
                  required:
                    - action
                    - email
                    - requestId
                  additionalProperties: false
                - type: object
                  properties:
                    action:
                      type: string
                      enum:
                        - verify_otp
                    email:
                      type: string
                      format: email
                    requestId:
                      type: string
                    code:
                      type: string
                      pattern: ^[0-9]{6}$
                  required:
                    - action
                    - email
                    - requestId
                    - code
                  additionalProperties: false
      responses:
        '200':
          description: >-
            Operation result. Read fields vary by endpoint and deployment; see
            narrative guide.
          content:
            application/json:
              schema:
                type: object
                additionalProperties: true
        '400':
          description: Invalid operation or layout.
        '401':
          description: Invalid or expired credential/session.
        '403':
          description: Scope, environment, tenant or authority denied.
        '404':
          description: Not found or outside app scope.
        '409':
          description: Stale version, active usage or idempotency conflict.
        '422':
          description: Invalid schema or required idempotency key.
        '429':
          description: Rate limited.
        '503':
          description: Sandbox disabled or operation temporarily unavailable.
      security: []

````

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