> ## Documentation Index > Fetch the complete documentation index at: https://docs.spritz.finance/llms.txt > Use this file to discover all available pages before exploring further. # Commit email OTP start > Submits the user's stamp for a previously prepared email-start intent. Dispatches the OTP and returns the `otpId` to pass back to the add-auth-method prepare call. ## OpenAPI ````yaml https://platform.spritz.finance/openapi.json post /v1/wallet-kit/auth-methods/email/start openapi: 3.0.3 info: title: Spritz Finance API version: 1.0.0 description: API for the Spritz Finance platform with RFC 9457 error handling servers: - url: https://platform.spritz.finance description: Production - url: https://sandbox.spritz.finance description: Sandbox security: [] tags: - name: Users description: User management endpoints - name: Bank Accounts description: Manage bank accounts for off-ramp destinations - name: Bills description: Manage bill pay accounts - name: Cards description: Spritz-issued debit cards - name: Auto-Ramp Accounts description: Virtual bank accounts that automatically convert fiat deposits to crypto - name: Spritz App description: >- Endpoints used by the Spritz app and internal SDKs. Excluded from the public partner spec. paths: /v1/wallet-kit/auth-methods/email/start: post: tags: - Wallet Kit summary: Commit email OTP start description: >- Submits the user's stamp for a previously prepared email-start intent. Dispatches the OTP and returns the `otpId` to pass back to the add-auth-method prepare call. operationId: postV1Wallet-kitAuth-methodsEmailStart requestBody: description: >- Commit body for any prepared auth-method activity (add, email-start, remove). required: true content: application/json: schema: description: >- Commit body for any prepared auth-method activity (add, email-start, remove). type: object properties: intentId: minLength: 1 description: Intent identifier returned by the matching prepare call. type: string stamp: minLength: 1 description: >- Turnkey stamp produced by signing the prepared `activityBody` with the user's WebAuthn authenticator. type: string required: - intentId - stamp application/x-www-form-urlencoded: schema: description: >- Commit body for any prepared auth-method activity (add, email-start, remove). type: object properties: intentId: minLength: 1 description: Intent identifier returned by the matching prepare call. type: string stamp: minLength: 1 description: >- Turnkey stamp produced by signing the prepared `activityBody` with the user's WebAuthn authenticator. type: string required: - intentId - stamp multipart/form-data: schema: description: >- Commit body for any prepared auth-method activity (add, email-start, remove). type: object properties: intentId: minLength: 1 description: Intent identifier returned by the matching prepare call. type: string stamp: minLength: 1 description: >- Turnkey stamp produced by signing the prepared `activityBody` with the user's WebAuthn authenticator. type: string required: - intentId - stamp responses: '202': description: Email-start commit response. The OTP has been dispatched. content: application/json: schema: description: Email-start commit response. The OTP has been dispatched. type: object properties: data: type: object properties: email: format: email description: Email the OTP was sent to. type: string otpId: description: >- OTP identifier to pass back to the add-auth-method prepare call along with the OTP. type: string required: - email - otpId required: - data '401': description: Response for status 401 content: application/json: schema: type: object properties: type: default: about:blank description: A URI reference that identifies the problem type type: string example: urn:problem-type:auth:unauthorized title: description: A short, human-readable summary of the problem type type: string example: Unauthorized status: description: The HTTP status code type: number example: 401 detail: description: A human-readable explanation specific to this occurrence type: string example: Bearer token required instance: description: A URI reference that identifies the specific occurrence type: string realm: description: The authentication realm type: string example: API scope: description: The required scope for this resource type: string example: read:users required: - title - status additionalProperties: false '409': description: Response for status 409 content: application/json: schema: type: object properties: type: default: about:blank description: A URI reference that identifies the problem type type: string example: urn:problem-type:auth:unauthorized title: description: A short, human-readable summary of the problem type type: string example: Unauthorized status: description: The HTTP status code type: number example: 400 detail: description: A human-readable explanation specific to this occurrence type: string instance: description: A URI reference that identifies the specific occurrence type: string example: /errors/1234567890 code: description: >- Machine-readable cause, present when exactly one thing failed. Branch on this, never on `detail`, which is human-facing copy and may change. For deposit limits the vocabulary matches the `reason` values the limits API returns pre-flight. type: string example: transaction_limit field: description: The offending request field, present alongside `code`. type: string example: amountUsd retryable: description: >- Whether retrying the same request later may succeed without changing its inputs. type: boolean example: true required: - title - status additionalProperties: false '500': description: Response for status 500 content: application/json: schema: type: object properties: type: default: about:blank description: A URI reference that identifies the problem type type: string example: urn:problem-type:auth:unauthorized title: description: A short, human-readable summary of the problem type type: string example: Unauthorized status: description: The HTTP status code type: number example: 400 detail: description: A human-readable explanation specific to this occurrence type: string instance: description: A URI reference that identifies the specific occurrence type: string example: /errors/1234567890 code: description: >- Machine-readable cause, present when exactly one thing failed. Branch on this, never on `detail`, which is human-facing copy and may change. For deposit limits the vocabulary matches the `reason` values the limits API returns pre-flight. type: string example: transaction_limit field: description: The offending request field, present alongside `code`. type: string example: amountUsd retryable: description: >- Whether retrying the same request later may succeed without changing its inputs. type: boolean example: true required: - title - status additionalProperties: false security: - bearerAuth: [] components: securitySchemes: bearerAuth: type: http scheme: bearer bearerFormat: JWT description: Cognito JWT token for regular user authentication ````