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

# List placement providers

> Mailbox providers you can pick for a placement test, grouped by region and market. Use the provider `id` values in `provider_ids` when you start a test. Spam-filter checks are added to every test automatically and are not listed.



## OpenAPI

````yaml /openapi-v1.json get /v2/placement/providers
openapi: 3.1.0
info:
  title: Mailercloud Marketing API
  version: 1.0.0
  description: >-
    Campaigns, contacts, lists, segments, automations, and webhooks for the
    Mailercloud Marketing Platform.
servers:
  - url: https://cloudapi.mailercloud.com/v1
security:
  - apiKey: []
tags:
  - name: Campaigns
  - name: Contacts
  - name: Lists
  - name: Tags
  - name: Segments
  - name: Custom Properties
  - name: Senders
  - name: Domains
  - name: Templates
  - name: Automations
  - name: Webhooks
  - name: Webforms
  - name: Inbox Tracker
  - name: Account
paths:
  /v2/placement/providers:
    get:
      tags:
        - Inbox Tracker
      summary: List placement providers
      description: >-
        Mailbox providers you can pick for a placement test, grouped by region
        and market. Use the provider `id` values in `provider_ids` when you
        start a test. Spam-filter checks are added to every test automatically
        and are not listed.
      operationId: placement-providers
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                type: object
                properties:
                  data:
                    type: object
                    properties:
                      total_seeds:
                        type: integer
                      default_region_ids:
                        type: array
                        items:
                          type: string
                      regions:
                        type: array
                        items:
                          type: object
                          properties:
                            id:
                              type: string
                            name:
                              type: string
                            groups:
                              type: array
                              items:
                                type: object
                                properties:
                                  id:
                                    type: string
                                  name:
                                    type: string
                                  country_code:
                                    type: string
                                  seed_count:
                                    type: integer
                                  providers:
                                    type: array
                                    items:
                                      type: object
                                      properties:
                                        id:
                                          type: string
                                        name:
                                          type: string
                                        seed_count:
                                          type: integer
        '401':
          description: Missing or invalid API key.
        '503':
          description: Placement testing is not available right now. Nothing was charged.
          content:
            application/json:
              schema:
                type: object
                properties:
                  error:
                    type: string
                    description: Human-readable message.
                  code:
                    type: string
                    enum:
                      - PLACEMENT_UNAVAILABLE
      servers:
        - url: https://cloudapi.mailercloud.com
components:
  securitySchemes:
    apiKey:
      type: apiKey
      in: header
      name: Authorization
      description: >-
        Your Mailercloud API key (plain text, no Bearer prefix). Create keys in
        Settings → API.

````

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