Insider

Insider Email APIs API

The Email APIs API from Insider — 2 operation(s) for email apis.

Documentation GitHub OpenAPI

Operations 2

POST /content/v1/campaign/create Create email campaigns #

POST /mail/v1/send Send transactional emails #

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OpenAPI Specification

openapi: 3.2.0
info:
  title: Insider One Mail Email APIs API
  version: 1.0.0
  description: 'Transactional email sending and email campaign creation.


    Derived by API Evangelist from Insider One''s own public Postman collection ("Insider One APIs", published at https://developers.insiderone.com/). Paths, methods, headers, query parameters and request/response examples are verbatim from that collection; nothing is invented. The 429 response is documented for all Insider One APIs on https://academy.insiderone.com/docs/api-rate-limits-1 .'
  contact:
    name: Insider One Support
    email: support@useinsider.com
    url: https://academy.insiderone.com/docs/insider-one-apis-1
  termsOfService: https://insiderone.com/terms-of-use/
servers:
- url: https://mail.useinsider.com
tags:
- name: Email APIs
paths:
  /content/v1/campaign/create:
    post:
      operationId: createEmailCampaigns
      summary: Create email campaigns
      tags:
      - Email APIs
      description: This API enables you to send email body and subject from your back-end to create email campaigns on Insider platform.
      security:
      - InsAuthKey: []
      requestBody:
        content:
          application/json:
            example:
              name: my single campaign
              tags:
              - v
              - tag1 789dfs44
              type: single
              variations:
              - subject: Hello {{name}} {{email}} {{custom3|fallback}}
                pre_header: apre {{surname|there}}
                html: 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
                utm:
                  source: thisis_source
                  campaign: thisis_campaign
                  medium: thisis_medium
                  extra: thisis_extra
      responses:
        '201':
          description: Created
          content:
            application/json:
              example:
                id: 1086764
                message: created
        '429':
          $ref: '#/components/responses/TooManyRequests'
  /mail/v1/send:
    post:
      operationId: sendTransactionalEmails
      summary: Send transactional emails
      tags:
      - Email APIs
      description: This API enables you to send targeted ecommerce and personalized one to one emails to your users.
      security:
      - InsAuthKey: []
      requestBody:
        content:
          application/json:
            example:
              subject: Hello
              tos:
              - name: John Doe
                email: sample@useinsider.com
              from:
                name: Posh Street
                email: posh@useinsider.com
              content:
              - type: text/html
                value: <p>I am {{first_name}}.</p>
              cc:
              - name: User in CC
                email: user.cc@useinsider.com
              bcc:
              - name: User in BCC
                email: user.bcc@useinsider.com
              reply_to:
                name: Reply to
                email: reply@useinsider.com
              dynamic_fields:
                first_name: John
                last_name: Doe
                product_name1: Laptop
                price1: $1000
                product_name2: Iphone
                price2: $850
              unique_args:
                category: Confirmation Email
                purchase_channel: App
              attachments:
              - content: aW5zaWRlciB0ZXN0
                file_name: file.txt
              callback:
                url: yourcallbackurl
                secret: yoursecret
      responses:
        '202':
          description: Accepted
          content:
            application/json:
              example:
                message_id: f0935bbf-fe1d-4b89-aa04-149c9a860081
                status_message: accepted
        '429':
          $ref: '#/components/responses/TooManyRequests'
components:
  responses:
    TooManyRequests:
      description: Too Many Requests. The published per-endpoint rate limit was exceeded; back off and retry, honouring Retry-After when present.
      content:
        application/json:
          example:
            message: Too Many Requests
            status: 429
  securitySchemes:
    InsAuthKey:
      type: apiKey
      in: header
      name: X-INS-AUTH-KEY
      description: Insider One authorization key for this API, generated in the InOne panel.
externalDocs:
  description: Insider One API reference
  url: https://academy.insiderone.com/docs/api-reference-welcome
x-provenance:
  generated: '2026-08-13'
  method: derived
  source: postman/insider-one-apis.postman_collection.json
  source_url: https://documenter.gw.postman.com/api/collections/24851117/2sB3dSR9bM
  publisher_page: https://developers.insiderone.com/
  note: Insider One publishes a single public Postman collection covering every REST API. This document is the subset of that collection served from mail.useinsider.com.