Instantly MCP Server

A lightweight, robust Model Context Protocol (MCP) server for the **Instantly.ai V2 API**, built with FastMCP.

Local serverstdioPython

What is the Instantly MCP MCP server?

A lightweight, robust Model Context Protocol (MCP) server for the Instantly.ai V2 API, built with FastMCP. That is what the instantly mcp mcp server brings to an AI assistant: the same capability, reachable through the Model Context Protocol rather than a separate app or dashboard.

The short version

  • 38 tools — across 6 categories (accounts, campaigns, leads, emails, analytics, background_jobs)
  • Dual transport support — HTTP (remote deployment) + stdio (local)
  • Lazy loading — Reduce context window by loading only specific tool categories
  • Multi-tenant support — Per-request API keys for HTTP deployments
  • Comprehensive error handling — Detailed, actionable error messages
  • Rate limiting — Automatic tracking from API response headers

The tools it exposes

The server publishes 14 tools. What each one is for:

  • list_accounts — List email accounts with filtering
  • get_account — Get account details and warmup status
  • create_account — Create account with IMAP/SMTP credentials
  • update_account — Update account settings
  • manage_account_state — Pause, resume, warmup control, test vitals
  • delete_account — ⚠️ Permanently delete account
  • create_campaign — Create email campaign (two-step process)
  • list_campaigns — List campaigns with pagination
  • get_campaign — Get campaign details and sequences
  • update_campaign — Update campaign settings
  • activate_campaign — Start campaign sending
  • pause_campaign — Stop campaign sending

Getting it running

The server ships on PyPI as fastmcp, so your MCP client can launch it on demand — there is no separate build step. Add the server block to your client's configuration, restart it, and the tools register themselves.

What it needs from you

Configuration is passed through the environment: INSTANTLY_API_KEY, TOOL_CATEGORIES, YOUR_API_KEY. Treat anything key-shaped as a real credential — scope it to the minimum the server needs, and rotate it if it ever lands in a shared config.

How it compares

Among the team communication options, the useful question is rarely "what can it do" but "what does it cost you to run" — permissions, credentials, and how much of your context its toolset consumes. Instantly MCP's toolset — list_accounts, get_account, create_account and 11 more — is a fair guide to whether it matches your workflow. It is maintained by bcharleson; worth a glance at recent repository activity before you build anything load-bearing on it.

This entry was verified against Instantly MCP's own documentation before publication; SyncDev keeps the directory reviewed rather than auto-generated.

Things to watch

  • It runs with your machine's permissions. That is convenient and also the reason to think about what you point it at before you approve a tool call.
  • With 14 tools registered it takes up a noticeable share of the context window; turn it off in projects that never touch Instantly MCP.
  • Missing credentials fail quietly in some clients — if no tools show up, check the environment block first.
  • Keep per-call confirmation enabled while you learn its behaviour; it is the cheapest safeguard you have.

Available tools

ToolWhat it does
list_accountsList email accounts with filtering
get_accountGet account details and warmup status
create_accountCreate account with IMAP/SMTP credentials
update_accountUpdate account settings
manage_account_statePause, resume, warmup control, test vitals
delete_account⚠️ Permanently delete account
create_campaignCreate email campaign (two-step process)
list_campaignsList campaigns with pagination
get_campaignGet campaign details and sequences
update_campaignUpdate campaign settings
activate_campaignStart campaign sending
pause_campaignStop campaign sending
delete_campaign⚠️ Permanently delete campaign
search_campaigns_by_contactFind campaigns a contact is enrolled in

How to install the Instantly MCP MCP server

#### HTTP Mode with Header Auth
```json
{
  "mcpServers": {
    "instantly": {
      "url": "https://your-server.com/mcp",
      "transport": "streamable-http",
      "headers": {
        "Authorization": "your-api-key-here"
      }
    }
  }
}

Configuration as documented by the project. Restart the client after saving.

Configuration

VariableDescriptionRequired
INSTANTLY_API_KEYCredential the server authenticates with.Yes
TOOL_CATEGORIESConfiguration value read at startup.Optional
YOUR_API_KEYCredential the server authenticates with.Yes

Example prompts to try

  • Use Instantly MCP to list accounts.
  • Use Instantly MCP to get account.
  • Use Instantly MCP to create account.

Frequently asked questions

It connects Instantly MCP to MCP-compatible AI assistants such as Claude and Cursor, exposing 14 tools (list_accounts, get_account, create_account, and more) that the assistant can call on your behalf. Instead of copying data back and forth by hand, the assistant works with Instantly MCP directly.