SenderKit

Build and send email, SMS, push, and web-push from your AI coding agent.

CommunityOnlineNo sign-inGlobalFreeCan modify data

What it can do

  • Senderkit Context: Returns the connected workspace (id, name, slug) and the send mode (live or test) for this connection. The mode is fixed for the whole connection. Call this before sending so you ca
  • Senderkit Send: Send a templated message to a recipient. This connection is bound to one mode: in TEST mode messages are recorded but NOT delivered; in LIVE mode they are really sent. The active mode
  • Senderkit Send Raw: Send inline content without a registered template. This connection is bound to one mode: in TEST mode messages are recorded but NOT delivered; in LIVE mode they are really sent. Th

What data it sees

Do you need an account

No: the server works without sign-in

Build and send email, SMS, push, and web-push from your AI coding agent.

How to connect

How to connect SenderKit to Claude

The server address to paste into Claude settings:

https://senderkit.run.tools

  1. Open Claude (claude.ai or the desktop app).
  2. Go to Settings → Connectors.
  3. Click Add custom connector.
  4. Paste the server address copied below into Remote MCP server URL and click Add.
  5. In a chat, click + → Connectors and switch the new connector on.

Custom connectors are available on Free, Pro, Max, Team and Enterprise plans (Free is limited to one). On Team and Enterprise an organization Owner adds the connector first under Organization settings → Connectors.

Authorization

After you click Add, a sign-in window for the service opens. Sign in with your own account and approve access. Claude never sees your password.

How to connect SenderKit to ChatGPT

The server address to paste into ChatGPT settings:

https://senderkit.run.tools

  1. Open ChatGPT in a browser (chatgpt.com). A Plus, Pro, Business, Enterprise or Edu plan is required.
  2. Turn on developer mode once: Settings → Apps → Advanced settings → Developer mode.
  3. Open Settings → Connectors and click Create.
  4. Fill in the form: Name (anything), Description (one line about what the service does), MCP server URL (copy it below).
  5. Under Authentication choose OAuth if the service requires sign-in, otherwise None. Click Create.
  6. In a new chat open + → Apps/Connectors and enable the connector.

OpenAI has renamed this section before (Connectors → Apps/Plugins). If the label differs, search settings for "developer mode". On Business/Enterprise workspaces an admin must allow custom connectors first.

Authorization

On first use ChatGPT opens the service's sign-in window. Sign in and approve access.

How to connect SenderKit to Cursor

The server address to paste into Cursor settings:

https://senderkit.run.tools

Fastest: click Open in Cursor below and confirm the prompt.

Manually:

  1. In Cursor open Settings → Cursor Settings → MCP and click Add new global MCP server.
  2. Paste the JSON copied below into ~/.cursor/mcp.json (per project: .cursor/mcp.json in the repo root).
  3. Save the file. The server appears in the MCP list; authorize it there if asked.

Authorization

If the service needs sign-in, an authorize button appears next to the server in the MCP list.

Server tool list (10)

Raw names from tools/list. Only developers need these.

senderkit_contextReturns the connected workspace (id, name, slug) and the send mode (live or test) for this connection. The mode is fixed for the whole connection. Call this before sending so you can tell the user which workspace they're in and whether messages will be really delivered (live) or only recorded without delivery (test).
senderkit_sendSend a templated message to a recipient. This connection is bound to one mode: in TEST mode messages are recorded but NOT delivered; in LIVE mode they are really sent. The active mode is returned by the senderkit_context tool and as `mode` in this tool's result — check it and tell the user which it is; do not ask which API key is configured.
senderkit_send_rawSend inline content without a registered template. This connection is bound to one mode: in TEST mode messages are recorded but NOT delivered; in LIVE mode they are really sent. The active mode is returned by the senderkit_context tool and as `mode` in this tool's result — check it and tell the user which it is; do not ask which API key is configured.
senderkit_templates_listList available templates.
senderkit_templates_getFetch a single template by slug.
senderkit_messages_listList messages, optionally filtered.
senderkit_messages_getFetch a single message by ID.
senderkit_cancel_messageCancel a still-pending message (scheduled or queued) by its public id.
senderkit_templates_createGenerate a new email/SMS/push template from a plain-language brief and save it as a DRAFT. Returns a link to review it in the editor. Nothing is sent until the user reviews and publishes the draft.
senderkit_templates_regenerateRegenerate an existing DRAFT template from a new brief. This REPLACES the draft's content and DISCARDS any manual edits made in the editor — warn the user before calling. Only drafts can be regenerated; published templates are left untouched.