> ## Documentation Index > Fetch the complete documentation index at: https://docs.drop-hub.com/llms.txt > Use this file to discover all available pages before exploring further. # Verify the registration OTP and create identity, account and session atomically > Verify the registration OTP and create identity, account and session atomically. ## OpenAPI ````yaml /openapi.yaml post /v2/account-registrations/{registrationId}/verifications openapi: 3.1.0 info: title: DropHub External API version: v2 description: >- DropHub API v2 for Merchant, shipping-company, shipment, and OAuth 2.0 integrations. contact: name: DropHub API Governance license: name: Proprietary servers: - url: https://api-test.drop-hub.com description: Sandbox deployment with isolated data and credentials. - url: https://api.drop-hub.com description: Production deployment; production credentials only. security: [] tags: - name: Authentication description: >- Authentication, sessions, the company a principal is, and merchant API credentials - name: External Price Estimates description: OAuth-scoped transient route-distance and tariff calculation - name: External Shipments description: OAuth-scoped Merchant shipment creation, lookup, and cancellation - name: External Tracking description: Merchant-authenticated and privacy-minimized public tracking projections - name: Sandbox description: >- Tenant-bound self-service fixture lifecycle, available only on the isolated sandbox deployment - name: Webhook Endpoints description: Merchant webhook subscriptions, lifecycle, and signing-secret rotation - name: Webhook Deliveries description: Durable webhook delivery history and replay paths: /v2/account-registrations/{registrationId}/verifications: post: tags: - Authentication summary: >- Verify the registration OTP and create identity, account and session atomically description: >- Verify the registration OTP and create identity, account and session atomically. operationId: verifyAccountRegistration parameters: - name: registrationId in: path required: true schema: type: string format: uuid requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/RegistrationVerificationRequest' responses: '201': description: >- Account created and one session issued; httpOnly cookies set for browsers headers: Set-Cookie: description: httpOnly session cookies for browser clients schema: type: string content: application/json: schema: $ref: '#/components/schemas/RegistrationSession' '400': $ref: '#/components/responses/BadRequest' '401': $ref: '#/components/responses/AuthenticationFailed' '405': $ref: '#/components/responses/MethodNotAllowed' '409': $ref: '#/components/responses/StateConflict' '422': $ref: '#/components/responses/ValidationFailed' '429': $ref: '#/components/responses/RateLimited' security: [] components: schemas: RegistrationVerificationRequest: type: object additionalProperties: false required: - otp properties: otp: type: string pattern: ^[0-9]{4,8}$ RegistrationSession: type: object additionalProperties: false required: - accountType properties: accountType: type: string enum: - MERCHANT - SHIPPING_COMPANY Problem: type: object description: RFC 9457 Problem Details with stable DropHub extensions additionalProperties: true required: - type - title - status - code - timestamp - correlationId - requestId properties: type: type: string format: uri title: type: string maxLength: 128 status: type: integer format: int32 minimum: 400 maximum: 599 detail: type: string maxLength: 512 instance: type: string format: uri-reference code: type: string pattern: ^[A-Z][A-Z0-9_]{1,63}$ timestamp: type: string format: date-time correlationId: type: string format: uuid requestId: type: string format: uuid traceId: type: string pattern: ^[0-9a-f]{32}$ violations: type: array maxItems: 20 items: $ref: '#/components/schemas/Violation' example: type: https://api.drop-hub.com/problems/access-denied title: Access denied status: 403 detail: Access to this resource is denied. instance: /v2/external/shipments/018f2d8a-1f00-7000-8000-000000000206 code: ACCESS_DENIED timestamp: '2026-08-22T18:30:00Z' correlationId: 018f2d8a-1f00-7000-8000-000000000207 requestId: 018f2d8a-1f00-7000-8000-000000000208 Violation: type: object additionalProperties: false required: - field - code - message properties: field: type: string maxLength: 128 code: type: string maxLength: 64 message: type: string maxLength: 256 responses: BadRequest: description: >- The request syntax, path parameter, query parameter, or JSON document is malformed. content: application/problem+json: schema: $ref: '#/components/schemas/Problem' AuthenticationFailed: description: Authentication failed without account, token, or tenant enumeration. headers: WWW-Authenticate: $ref: '#/components/headers/WwwAuthenticate' content: application/problem+json: schema: $ref: '#/components/schemas/Problem' example: type: https://api.drop-hub.com/problems/authentication-required title: Authentication required status: 401 detail: Authentication is required for this resource. instance: /v2/external/shipments/018f2d8a-1f00-7000-8000-000000000206 code: AUTHENTICATION_REQUIRED timestamp: '2026-08-22T18:30:00Z' correlationId: 018f2d8a-1f00-7000-8000-000000000207 requestId: 018f2d8a-1f00-7000-8000-000000000208 MethodNotAllowed: description: The method is not supported for this resource. headers: Allow: description: Methods supported by this resource. schema: type: string content: application/problem+json: schema: $ref: '#/components/schemas/Problem' StateConflict: description: Current state prevents the requested transition. content: application/problem+json: schema: $ref: '#/components/schemas/Problem' ValidationFailed: description: The request fails strict syntax or semantic validation. content: application/problem+json: schema: $ref: '#/components/schemas/Problem' RateLimited: description: The security operation is temporarily rate limited. headers: Retry-After: description: Suggested delay in seconds when available. schema: type: integer minimum: 1 content: application/problem+json: schema: $ref: '#/components/schemas/Problem' headers: WwwAuthenticate: description: Bearer challenge for an unauthenticated or invalid-token request. schema: type: string example: Bearer ````