Kickbox Open API

Free disposable-domain lookup (no auth).

Operations 1

GET /v1/disposable/{email} Check if a domain is a known disposable email provider #

Work with this as data

Every API here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for apis

7 MCP tools reach this
  • find_apisBrowse and filter every API in the catalog.
  • get_api_artifactsOne API's artifacts, grouped by type.
  • get_openapiThe primary OpenAPI for this API.
  • find_similar_apisAPIs that look like this one.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools →

Call it yourself

curl for this page
This API
curl "https://apis.io/api/v1/apis/kickbox-open-api"
All apis
curl "https://apis.io/api/v1/apis?limit=25"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

A second provider on the same verified email joins the account you already have.

OpenAPI Specification

kickbox-open-api-openapi.yml Raw ↑
openapi: 3.2.0
info:
  title: Kickbox Email Verification Account Open API
  description: 'REST API for verifying the deliverability of email addresses with Kickbox.

    Endpoint paths and authentication are derived from the official Kickbox PHP

    SDK at https://github.com/kickboxio/kickbox-php (see HttpClient.php and

    Api/Kickbox.php), which is the canonical client for the production API.

    '
  version: 2.0.0
  contact:
    name: Kickbox
    url: https://kickbox.com/
    email: help@kickbox.com
servers:
- url: https://api.kickbox.com
  description: Kickbox production API.
- url: https://open.kickbox.io
  description: Kickbox Open (disposable lookup) API.
security:
- TokenAuth: []
tags:
- name: Open
  description: Free disposable-domain lookup (no auth).
paths:
  /v1/disposable/{email}:
    servers:
    - url: https://open.kickbox.io
      description: Kickbox Open API (free, no auth).
    parameters:
    - name: email
      in: path
      required: true
      schema:
        type: string
    get:
      tags:
      - Open
      summary: Check if a domain is a known disposable email provider
      operationId: isDisposable
      security: []
      responses:
        '200':
          description: Disposable lookup result.
          content:
            application/json:
              schema:
                type: object
                properties:
                  disposable:
                    type: boolean
components:
  securitySchemes:
    TokenAuth:
      type: http
      scheme: bearer
      bearerFormat: token
      description: 'Kickbox API key sent in the Authorization header in the form

        `Authorization: token YOUR_API_KEY`.

        '