← All integrations

InboxKit MCP server

181 operations4 webhooks

Cold email infrastructure from InboxKit; buy and connect domains and Google or Microsoft mailboxes, manage DNS, warmup and sequencer exports, and watch deliverability

Try InboxKit with your agent

Connect InboxKit, 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 InboxKit on my account, then run one read-only example and show me the result.

Runs once, when you ask

InboxKit tools and triggers

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

Domains

  • Check AvailabilityRead-only

    Whether one domain can be registered, with its price and ban status. Takes no workspace.

    domains.checkAvailability

  • Check BannedRead-only

    Whether one domain is banned from registration. Takes no workspace.

    domains.checkBanned

  • Check PropagationRead-only

    Whether the nameservers of these domains have propagated.

    domains.checkPropagation

  • Check Workspace AvailabilityRead-only

    Whether domains can be used with Google Workspace or Microsoft 365.

    domains.checkWorkspaceAvailability

  • ConnectWrite

    Connect domains you already own to the workspace and get the nameservers to set at your registrar.

    domains.connect

  • Get Move StatusRead-only

    Whether a move started with domains.moveWorkspace has finished.

    domains.getMoveStatus

  • Get Renewal StatusRead-only

    Renewal status of purchased domains, filtered by name, uid or status.

    domains.getRenewalStatus

  • Get Rotation StatusRead-only

    Progress of a rotation. Poll every 30 to 60 seconds until completed, partially_completed or failed.

    domains.getRotationStatus

  • ListRead-only

    The workspace's domains with status, nameservers and DNS records. Paginated, with filters by keyword, status and uid.

    domains.list

  • List AssignableRead-only

    Domains that can take more mailboxes.

    domains.listAssignable

  • Move WorkspaceWrite

    Move domains to another workspace in the team, with their mailboxes and DNS records. Run domains.previewMove first.

    domains.moveWorkspace

  • Preview MoveRead-only

    What moving domains to another workspace would do, and why any cannot move. Nothing changes.

    domains.previewMove

Connect InboxKit to Claude, ChatGPT or Cursor

  1. 1

    Connect InboxKit in Corsair

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

    If your link lets the agent add apps, you can skip this: it gives you a sign-in link the first time it needs InboxKit. On a ChatGPT personal plan, connect InboxKit 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. In the default Cautious mode, InboxKit's read and write operations run right away and its 51 destructive operations wait for your approval. Strict mode asks before every write and refuses destructive operations, and Read mode allows reads only.

FAQ

Install corsair and @corsair-dev/inboxkit, add the InboxKit plugin, and connect with an API key. Then call methods like corsair.inboxkit.api.account.get() from your app. Corsair verifies webhooks, and syncs data per tenant.

Yes. InboxKit requires an API key from your InboxKit 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 InboxKit, GitHub, Notion, Stripe, and the rest. Trigger InboxKit from a webhook, push updates to Slack, or chain actions across plugins. Same tenant context across integrations, plain TypeScript.

Teams use Corsair for cold email infrastructure from InboxKit; buy and connect domains and Google or Microsoft mailboxes, manage DNS, warmup and sequencer exports, and watch deliverability. Common builds include sync jobs, admin tooling, and agents that call InboxKit APIs from your backend. Webhook handlers react to InboxKit events and fan out to Slack, email, or other plugins in the same tenant. Local DB entities let you query synced InboxKit records without hitting the API on every read.

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 InboxKit 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/inboxkit in the open repo. When InboxKit 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 InboxKit data or hold individual access credentials. Credentials stay in your database. API calls run on your instance. We do not store InboxKit 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 InboxKit on a link in Strict mode and every write waits for your approval, while destructive actions are refused. The default Cautious mode asks only before the 51 destructive InboxKit operations. You can change a link's mode at hub.corsair.dev/me.