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

# Get a mailbox thread

> Get every message of a conversation that is visible to the mailbox, oldest first.



## OpenAPI

````yaml https://inbound.new/openapi.json get /api/e2/mailboxes/{id}/threads/{threadId}
openapi: 3.1.0
info:
  title: Inbound Email API
  description: >+

    # Inbound API


    The Inbound API allows you to manage email infrastructure programmatically -
    domains, email addresses, webhooks, and more.


    ## Authentication


    All API requests require a Bearer token in the Authorization header:


    ```bash

    curl -H "Authorization: Bearer YOUR_API_KEY" \
      https://inbound.new/api/e2/domains
    ```


    ## Base URL


    ```

    https://inbound.new/api/e2

    ```


    ## Quick Start


    1. **Create a domain** - Register your domain with Inbound

    2. **Configure DNS** - Add the provided DNS records to your domain

    3. **Create an email address** - Set up addresses to receive emails

    4. **Create an endpoint** - Configure where emails are delivered (webhook,
    forwarding, etc.)

  version: 2.0.0
servers:
  - url: https://inbound.new
    description: Production API server
security:
  - bearerAuth: []
tags:
  - name: Webhooks
    description: Webhooks sent by Inbound to your configured endpoints when events occur.
  - name: Emails
    description: >-
      Send, list, and manage emails. Supports immediate sending, scheduling,
      replies, and retry functionality.
  - name: Mail
    description: >-
      Inbox and thread views for received emails. Filter by domain, address, or
      search.
  - name: Domains
    description: >-
      Manage domains for sending and receiving emails. Domains must be verified
      via DNS before use.
  - name: Endpoints
    description: >-
      Configure where incoming emails are delivered - webhooks, email
      forwarding, or custom handlers.
  - name: Email Addresses
    description: Create and manage email addresses on your verified domains.
  - name: Attachments
    description: Download email attachments using authenticated requests.
paths:
  /api/e2/mailboxes/{id}/threads/{threadId}:
    get:
      tags:
        - Mailboxes
      summary: Get a mailbox thread
      description: >-
        Get every message of a conversation that is visible to the mailbox,
        oldest first.
      operationId: getApiE2MailboxesByIdThreadsByThreadId
      parameters:
        - name: id
          in: path
          required: true
          schema:
            type: string
        - name: threadId
          in: path
          required: true
          schema:
            type: string
      responses:
        '200':
          description: Response for status 200
          content:
            application/json:
              schema:
                type: object
                properties:
                  threadId:
                    type: string
                  messages:
                    type: array
                    items:
                      type: object
                      properties:
                        id:
                          type: string
                        folder:
                          type: string
                          enum:
                            - inbox
                            - archive
                            - sent
                        threadId:
                          nullable: true
                          anyOf:
                            - type: string
                            - type: 'null'
                        subject:
                          nullable: true
                          anyOf:
                            - type: string
                            - type: 'null'
                        from:
                          type: string
                        to:
                          type: array
                          items:
                            type: string
                        date:
                          nullable: true
                          anyOf:
                            - type: string
                            - type: 'null'
                        preview:
                          nullable: true
                          anyOf:
                            - type: string
                            - type: 'null'
                        isRead:
                          type: boolean
                        hasAttachments:
                          type: boolean
                        messageId:
                          nullable: true
                          anyOf:
                            - type: string
                            - type: 'null'
                        inReplyTo:
                          nullable: true
                          anyOf:
                            - type: string
                            - type: 'null'
                        cc:
                          type: array
                          items:
                            type: string
                        replyTo:
                          type: array
                          items:
                            type: string
                        envelopeRecipients:
                          type: array
                          items:
                            type: string
                        text:
                          nullable: true
                          anyOf:
                            - type: string
                            - type: 'null'
                        html:
                          nullable: true
                          anyOf:
                            - type: string
                            - type: 'null'
                        attachments:
                          type: array
                          items:
                            type: object
                            properties:
                              index:
                                type: number
                              filename:
                                nullable: true
                                anyOf:
                                  - type: string
                                  - type: 'null'
                              contentType:
                                nullable: true
                                anyOf:
                                  - type: string
                                  - type: 'null'
                              size:
                                nullable: true
                                anyOf:
                                  - type: number
                                  - type: 'null'
                            required:
                              - index
                              - filename
                              - contentType
                              - size
                        status:
                          type: string
                      required:
                        - id
                        - folder
                        - threadId
                        - subject
                        - from
                        - to
                        - date
                        - preview
                        - isRead
                        - hasAttachments
                        - messageId
                        - inReplyTo
                        - cc
                        - replyTo
                        - envelopeRecipients
                        - text
                        - html
                        - attachments
                required:
                  - threadId
                  - messages
        '400':
          description: Response for status 400
          content:
            application/json:
              schema:
                type: object
                properties:
                  error:
                    type: string
                required:
                  - error
        '401':
          description: Response for status 401
          content:
            application/json:
              schema:
                type: object
                properties:
                  error:
                    type: string
                required:
                  - error
        '403':
          description: Response for status 403
          content:
            application/json:
              schema:
                type: object
                properties:
                  error:
                    type: string
                required:
                  - error
        '404':
          description: Response for status 404
          content:
            application/json:
              schema:
                type: object
                properties:
                  error:
                    type: string
                required:
                  - error
        '409':
          description: Response for status 409
          content:
            application/json:
              schema:
                type: object
                properties:
                  error:
                    type: string
                required:
                  - error
components:
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: API Key
      description: >-
        Your Inbound API key. Include it in the Authorization header as: Bearer
        <your-api-key>

````

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