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Kickbox MCP server

2 operations0 webhooks

Email verification with Kickbox - verify a single address for deliverability, role, free and disposable flags, typo suggestions and a Sendex quality score, and check whether a domain is a known disposable one for free.

Use Kickbox in Claude, ChatGPT, Cursor or another MCP client

Connect Kickbox once in Corsair, then add one MCP address to your agent.

Connect Kickbox
Setup steps for Claude, ChatGPT, Cursor and Claude Code

Building your own app on the Corsair SDK? Get API keys

Try Kickbox with your agent

Connect Kickbox, then paste this into Claude, ChatGPT or Cursor. For ideas from other apps, see the use cases.

Using Corsair, show me what you can do in Kickbox on my account, then run one read-only example and show me the result.

Runs once, when you ask

Kickbox tools and triggers

Tools are what your agent can do in Kickbox through Corsair's MCP server. Triggers are the Kickbox events a routine can start from.

Verify

  • DisposableRead-only

    Check whether an address or domain is a known disposable one. Free, and answered by Kickbox’s open service

    verify.disposable

  • VerifyRead-only

    Verify one address and get its verdict (deliverable, undeliverable, risky, unknown), the reason, role and free flags, a typo suggestion and a Sendex quality score. Spends one verification credit

    verify.verify

Connect Kickbox to Claude, ChatGPT or Cursor

  1. 1

    Connect Kickbox in Corsair

    Add your Kickbox API key once in Corsair. Corsair stores the credential encrypted and makes the Kickbox API calls for your agent, so it never goes into a prompt or a config file. Connect Kickbox

    If your link lets the agent add apps, you can skip this: it gives you a sign-in link the first time it needs Kickbox. On a ChatGPT personal plan, connect Kickbox here first.

  2. 2

    Add Corsair's MCP server to your agent

    Every client uses the same address:

    https://mcp.corsair.dev/mcp
    Open Customize → Connectors → Add custom connector, paste the address, then select Connect.

    Codex, Gemini CLI, VS Code, Zed and other clients with OAuth sign-in work the same way. Clients without it, such as GitHub Copilot's coding agent, use a link's own address and an API key. Setup for every client

  3. 3

    Sign in and choose what needs your approval

    Your client opens Corsair to sign in. Pick a link: the apps your agent can use and a mode that decides what it may do without asking. Every Kickbox operation only reads data, so it runs right away in every mode.

FAQ

Install corsair and @corsair-dev/kickbox, add the Kickbox plugin, and connect with an API key. Then call methods like corsair.kickbox.api.verify.disposable() from your app. Corsair keeps each tenant isolated.

Yes. Kickbox requires an API key from your Kickbox account or developer dashboard. Create credentials with access that matches what you automate, then paste them into Corsair or connect through managed auth in Hub.

Yes. One Corsair client can hit Kickbox, GitHub, Notion, Stripe, and the rest. Trigger Kickbox from a webhook, push updates to Slack, or chain actions across plugins. Same tenant context across integrations, plain TypeScript.

Teams use Corsair for email verification with Kickbox - verify a single address for deliverability, role, free and disposable flags, typo suggestions and a Sendex quality score, and check whether a domain is a known disposable one for free. Common builds include sync jobs, admin tooling, and agents that call Kickbox APIs from your backend.

The SDK is open source. Self-host and you pay Corsair nothing for the integration layer. Hub bills for hosted auth and execution, not per Kickbox API call. Hub has a generous free tier. For hobby projects you can probably run the whole thing on free. Paid plans start to matter with more tenants or heavier traffic.

We maintain @corsair-dev/kickbox in the open repo. When Kickbox ships API changes, upgrade the package. Your call sites stay typed. You should not need to rewrite the integration layer each time.

No. Corsair does not read your Kickbox data or hold individual access credentials. Credentials stay in your database. API calls run on your instance. We do not store Kickbox data on your behalf.

Yes. Add https://mcp.corsair.dev/mcp as a custom connector or MCP server in Claude, ChatGPT, Cursor, VS Code, Claude Code, Codex or any client that supports remote MCP servers with OAuth sign-in, then sign in to Corsair. On ChatGPT personal plans, custom servers currently get read tools only.

Yes. Put Kickbox on a link in Strict mode and every write waits for your approval, while destructive actions are refused. Every Kickbox operation only reads data, so there are no changes to approve today. You can change a link's mode at hub.corsair.dev/me.