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

# Send quick bulk SMS to multiple contacts

> Fan-out send of a single SMS body (or templated body via `templateId`) to up to N contacts in one request. Returns a per-contact result list with `success`/`error` so the UI can surface partial failures.



## OpenAPI

````yaml /api-reference/openapi.yaml post /api/messages/quick-bulk-send
openapi: 3.0.3
info:
  title: Tether Relay and Tether API
  version: 1.0.0
  description: >-
    Route-derived OpenAPI contract generated from tether-relay backend sources.
    Regenerate with scripts/sync-openapi-from-backend.mjs.
servers:
  - url: https://your-instance.example.com
    description: Production
  - url: http://localhost:2212
    description: Local API service
security: []
tags:
  - name: AI
  - name: Applications
  - name: Approval
  - name: Auth
  - name: Automations
  - name: Calls
  - name: Campaigns
  - name: Contact Analytics
  - name: Contact Metrics
  - name: Contact Notes
  - name: Contacts
  - name: Conversation Monitor
  - name: Conversations
  - name: Departments
  - name: Email
  - name: Escalation Dashboard
  - name: Event Logs
  - name: Google Sheets
  - name: Marketplace
  - name: Messages
  - name: Notification Sounds
  - name: Notifications
  - name: Org Snapshots
  - name: Organizations
  - name: Outreach
  - name: Outreach Metrics
  - name: Outreach Sources
  - name: Pipelines
  - name: Processes
  - name: Prompts
  - name: Reminders
  - name: Sms
  - name: Templates
  - name: Traces
  - name: Training
  - name: Upload
  - name: User Snapshots
  - name: Users
  - name: Vertical
  - name: Webchats
  - name: Webhook
paths:
  /api/messages/quick-bulk-send:
    post:
      tags:
        - Messages
      summary: Send quick bulk SMS to multiple contacts
      description: >-
        Fan-out send of a single SMS body (or templated body via `templateId`)
        to up to N contacts in one request. Returns a per-contact result list
        with `success`/`error` so the UI can surface partial failures.
      operationId: post_messages_quick_bulk_send
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/SendQuickBulkSmsRequest'
      responses:
        '200':
          description: Bulk send results
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/QuickBulkSmsResponse'
        '400':
          description: Validation error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/LegacyErrorResponse'
        '404':
          description: No contacts found
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/LegacyErrorResponse'
      security:
        - bearerAuth: []
components:
  schemas:
    SendQuickBulkSmsRequest:
      type: object
      properties:
        contactIds:
          type: array
          items:
            type: string
          description: Recipients to text. Capped server-side (<=100 per request).
        message:
          type: string
          description: SMS body; ignored when `templateId` is supplied.
        templateId:
          type: string
          description: Template `_id` whose body is used; takes precedence over `message`.
      required:
        - contactIds
      description: Either message or templateId must be provided, but not both
      additionalProperties: true
      example:
        contactIds:
          - 65c2d0e0f0a0b0c0d0e0f0a0
          - 65c2d0e0f0a0b0c0d0e0f0a1
        message: Hi {{firstName}}, our team will be in touch shortly.
    QuickBulkSmsResponse:
      type: object
      properties:
        success:
          type: boolean
        summary:
          type: object
          properties:
            total:
              type: integer
            success:
              type: integer
            failed:
              type: integer
          additionalProperties: false
        results:
          type: array
          items:
            type: object
            properties:
              contactId:
                type: string
              success:
                type: boolean
              name:
                type: string
              messageId:
                type: string
              messageDocId:
                type: string
              status:
                type: string
              error:
                type: string
            additionalProperties: true
      additionalProperties: true
      example:
        success: true
        summary:
          total: 2
          success: 1
          failed: 1
        results:
          - contactId: 65c2d0e0f0a0b0c0d0e0f0a0
            success: true
            name: Jane Doe
            messageId: SMxxx
            messageDocId: 67d0a0b0c0d0e0f0a0b0c0d0
            status: queued
          - contactId: 65c2d0e0f0a0b0c0d0e0f0a1
            success: false
            name: John Smith
            error: Invalid phone number
    LegacyErrorResponse:
      type: object
      properties:
        error:
          type: string
        message:
          type: string
        data: {}
      additionalProperties: true
      example:
        error: Attachment not found
        message: Attachment not found
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: JWT

````