> ## Documentation Index > Fetch the complete documentation index at: https://docs.wave.sa/llms.txt > Use this file to discover all available pages before exploring further. # Transfer a call > Blind-transfers the caller (the customer leg) of an answered call to a `target`, with no announcement to the target first. Do not depend on the current agent leg staying connected after the transfer. `target.type` is `number` (a KSA phone number; the caller-ID is your Wave number on this call), `user` (a web-calling identity of your organization) or `queue` (a queue of your organization). Works on calls that Wave placed and on inbound calls; web-calling calls are not controllable. Wave answers `202` at once; one `call.transferred` webhook later reports the `outcome`: `answered`, `no_answer`, `busy`, `failed`, `cancelled`, `enqueued` or `expired`. If the target does not answer, the call ends. On a simulated sandbox call the transfer completes at once with `answered`. Requires the `calls:write` scope. Needs in-call control and call transfer to be enabled on the environment (503 until then); not available in production yet. ## OpenAPI ````yaml /api-reference/openapi.json post /v1/calls/{call_id}/transfer openapi: 3.1.0 info: title: Wave API version: 1.0.0 description: >- Wave API Platform — voice, numbers, and messaging for Saudi Arabia. Request schemas are GENERATED from the @wave-sa/shared Zod schemas — do not edit by hand (run `pnpm --filter @wave-sa/api generate:openapi`). servers: - url: https://api.wave.sa security: - bearerAuth: [] paths: /v1/calls/{call_id}/transfer: post: tags: - In-call control summary: Transfer a call description: >- Blind-transfers the caller (the customer leg) of an answered call to a `target`, with no announcement to the target first. Do not depend on the current agent leg staying connected after the transfer. `target.type` is `number` (a KSA phone number; the caller-ID is your Wave number on this call), `user` (a web-calling identity of your organization) or `queue` (a queue of your organization). Works on calls that Wave placed and on inbound calls; web-calling calls are not controllable. Wave answers `202` at once; one `call.transferred` webhook later reports the `outcome`: `answered`, `no_answer`, `busy`, `failed`, `cancelled`, `enqueued` or `expired`. If the target does not answer, the call ends. On a simulated sandbox call the transfer completes at once with `answered`. Requires the `calls:write` scope. Needs in-call control and call transfer to be enabled on the environment (503 until then); not available in production yet. operationId: transferCall parameters: - name: call_id in: path required: true schema: type: string format: uuid requestBody: required: true content: application/json: schema: type: object properties: target: type: object properties: type: type: string enum: - number - user - queue value: type: string minLength: 1 maxLength: 64 required: - type - value additionalProperties: false required: - target additionalProperties: false responses: '202': description: The transfer was requested content: application/json: schema: $ref: '#/components/schemas/CallTransferAccepted' '400': description: Validation error (a missing or unknown target type) content: application/json: schema: $ref: '#/components/schemas/Error' '401': description: Missing or invalid API key content: application/json: schema: $ref: '#/components/schemas/Error' '403': description: The key lacks the calls:write scope content: application/json: schema: $ref: '#/components/schemas/Error' '404': description: No such call for your organization content: application/json: schema: $ref: '#/components/schemas/Error' '409': description: >- The call has ended (CALL_NOT_ACTIVE), is not answered yet (CALL_NOT_ANSWERED), already has a transfer in progress (TRANSFER_IN_PROGRESS), or its type does not accept in-call actions (CALL_NOT_CONTROLLABLE) content: application/json: schema: $ref: '#/components/schemas/Error' '422': description: >- The target has a bad format or is not your organization's (TRANSFER_TARGET_INVALID) content: application/json: schema: $ref: '#/components/schemas/Error' '501': description: Call transfer is not supported on this environment yet content: application/json: schema: $ref: '#/components/schemas/Error' '502': description: The voice engine could not start the transfer content: application/json: schema: $ref: '#/components/schemas/Error' '503': description: In-call control or call transfer not enabled for this environment content: application/json: schema: $ref: '#/components/schemas/Error' security: - bearerAuth: [] components: schemas: CallTransferAccepted: type: object properties: call_id: type: string format: uuid transfer_id: type: string format: uuid action: type: string enum: - transfer status: type: string enum: - requested request_id: type: string required: - call_id - transfer_id - action - status - request_id Error: type: object description: Wave's standard bilingual error envelope. required: - error_code - message - message_ar - request_id - docs_url properties: error_code: type: string enum: - INVALID_API_KEY - EXPIRED_API_KEY - REVOKED_API_KEY - SANDBOX_KEY_NOT_ALLOWED - INSUFFICIENT_PERMISSIONS - API_KEY_REVEAL_UNAVAILABLE - RATE_LIMIT_EXCEEDED - RECAPTCHA_FAILED - SANDBOX_EXPIRED - OTP_INVALID - OTP_EXPIRED - OTP_TOO_MANY_ATTEMPTS - OTP_RESEND_TOO_SOON - OTP_SEND_FAILED - INVALID_PHONE_NUMBER - CALLBACK_NOT_FOUND - CALLBACK_ALREADY_CANCELLED - CALLBACK_NOT_CANCELLABLE - CALL_NOT_FOUND - CALL_FAILED - INSUFFICIENT_CREDITS - CALL_NOT_CONTROLLABLE - CALL_NOT_ACTIVE - CALL_NOT_ANSWERED - AGENT_LEG_NOT_CONNECTED - CALL_CONTROL_FAILED - CALL_CONTROL_UNSUPPORTED - CALL_CONTROL_DISABLED - INVALID_PLAY_URL - TRANSFER_IN_PROGRESS - TRANSFER_TARGET_INVALID - QUEUE_CONTROL_FAILED - QUEUE_SERVICE_UNAVAILABLE - RECORDING_NOT_FOUND - RECORDING_URL_EXPIRED - RECORDING_SERVICE_UNAVAILABLE - CALLFLOW_AUDIO_SERVICE_UNAVAILABLE - VOICE_AUTH_DISABLED - VOICE_AUTH_NOT_FOUND - VOICE_AUTH_ASSURANCE_UNSUPPORTED - VOICE_AUTH_RATE_LIMITED - VOICE_AUTH_BLOCKED - VOICE_AUTH_BRAND_NOT_APPROVED - VOICE_AUTH_BRAND_NOT_FOUND - VOICE_AUTH_BRAND_INVALID_STATE - VOICE_AUTH_BRAND_DUPLICATE - VERIFY_DISABLED - VERIFY_NOT_FOUND - VERIFY_INVALID_CODE - VERIFY_MAX_ATTEMPTS - VERIFY_EXPIRED - VERIFY_RATE_LIMITED - VERIFY_SEND_FAILED - VERIFY_BLOCKED - VOICEMAIL_DISABLED - VOICEMAIL_NOT_FOUND - VOICEMAIL_RECORDING_NOT_FOUND - VOICEMAIL_SERVICE_UNAVAILABLE - VOICEMAIL_GREETING_INVALID - DLQ_REPLAY_DISABLED - DLQ_REPLAY_BROKER_UNAVAILABLE - MESSAGES_DISABLED - IVR_DISABLED - SANDBOX_INVALID_QUEUE - SANDBOX_QUEUE_UNAVAILABLE - SANDBOX_SIMULATED_SERVER_ERROR - SANDBOX_DESTINATION_NOT_ALLOWED - SANDBOX_MINUTES_EXCEEDED - WIDGET_ORIGIN_NOT_ALLOWED - PROJECT_NOT_FOUND - WEBHOOK_URL_INVALID - WEBHOOK_UNREACHABLE - WEBHOOK_LIMIT_EXCEEDED - WEBHOOK_URL_DUPLICATE - WEBHOOK_NOT_FOUND - WEBHOOK_VERIFICATION_FAILED - SIGNUP_EMAIL_TAKEN - SIGNUP_VALIDATION_FAILED - VITALPBX_PROVISIONING_FAILED - SIGNUP_FAILED - API_KEY_NOT_FOUND - API_KEY_REVEAL_FORBIDDEN - PRODUCTION_ACCESS_ALREADY_REQUESTED - PRODUCTION_TIER_REQUIRED - PRODUCTION_REQUEST_EXISTS - PRODUCTION_REQUEST_NOT_FOUND - PRODUCTION_REQUEST_INVALID_STATE - VALIDATION_ERROR - INTERNAL_ERROR - NOT_FOUND - PAYLOAD_TOO_LARGE - IDEMPOTENCY_KEY_CONFLICT - INVALID_CREDENTIALS - SESSION_REQUIRED - INVALID_ACCESS_TOKEN - EXPIRED_ACCESS_TOKEN - INVALID_REFRESH_TOKEN - EXPIRED_REFRESH_TOKEN - REFRESH_REUSE_DETECTED - REFRESH_ROTATION_RACE - SESSION_IDLE_TIMEOUT - WEB_CALLING_DISABLED - ORIGIN_NOT_ALLOWED - WEBRTC_CONCURRENCY_LIMIT - WCS_NOT_FOUND - WCS_EXPIRED - WCS_REVOKED - WCS_REUSE_DETECTED - WCS_NOT_ALLOWED_AS_BEARER - WEBRTC_PROVISIONING_FAILED - TURN_UNAVAILABLE - INVALID_IDENTITY - IDENTITY_CONFLICT - PROFILE_VALIDATION_FAILED - PASSWORD_VALIDATION_FAILED - INVALID_CURRENT_PASSWORD - PASSWORD_SSO_ONLY - SETUP_ALREADY_COMPLETE - INVALID_NATIONAL_ID - NAFATH_INITIATE_FAILED - NAFATH_NOT_VERIFIED - NAFATH_REJECTED - NAFATH_EXPIRED - NAFATH_ALREADY_REGISTERED - NAFATH_INVALID_WEBHOOK - NAFATH_ALREADY_VERIFIED - NAFATH_REQUIRED - ADMIN_UNAUTHORIZED - ADMIN_INVALID_CREDENTIALS - ADMIN_ORG_OWNER_EMAIL_TAKEN - ADMIN_USER_NOT_FOUND - INSUFFICIENT_ROLE - LAST_OWNER - INVALID_SCOPE - NUMBER_NOT_AVAILABLE - NUMBER_NOT_FOUND - NUMBER_ALREADY_ASSIGNED - NUMBER_PROVIDER_ERROR - PORTING_INVALID_STATE - PORTING_NOT_FOUND - OWN_DID_NUMBER_REQUIRED - OWN_DID_NUMBER_NOT_AUTHORIZED - OWN_DID_NUMBER_UNAVAILABLE - SPEND_CAP_EXCEEDED - RATE_PLAN_NOT_FOUND - PAYMENT_FAILED - DUPLICATE_USAGE_EVENT - INVOICE_NOT_FOUND - ENGINE_UNAUTHORIZED - CALLFLOW_TENANT_NOT_FOUND - CLI_NOT_OWNED - WEBHOOK_UNAUTHORIZED - CHANNEL_NOT_CONFIGURED - WEBHOOK_PAYLOAD_INVALID - INVITE_NOT_FOUND - INVITE_NOT_PENDING - INVITE_EXPIRED - INVITE_ROLE_INVALID - INVITE_ALREADY_MEMBER - INVITE_EMAIL_OTHER_ORG - INVITE_ACCOUNT_DETAILS_REQUIRED message: type: string description: English message. message_ar: type: string description: Arabic message. request_id: type: string docs_url: type: string format: uri securitySchemes: bearerAuth: type: http scheme: bearer bearerFormat: sk_sandbox_* | sk_live_* description: >- Your API key from the Wave dashboard. Sandbox keys start `sk_sandbox_`; production keys start `sk_live_`. Send as `Authorization: Bearer `. Some endpoints require a production key and specific scopes. ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.