Cold Email MCP server

by Bluecraft-AI·io.github.Bluecraft-AI/cold-email·v1.0.1·2 stars

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Generate hyper-personalized cold email sequences via AI.

C67/100grade C

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Safety scan

C67/100

full report

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2 stars

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If you have run it, two minutes of your experience saves the next person an afternoon.

Cold Email tools (6, 1 write)

write = sends, deletes, buys or posts

export_listFree
Download the generated email sequences for a COMPLETED list. Only call this AFTER get_list_status shows processing_status = 'completed'. If the list is not yet completed, you'll get a 409 error — poll first.
generate_batchwrite actionFree
Submit multiple leads for batch email sequence generation (ASYNC). Returns IMMEDIATELY with a list_id. Processing runs in the background. After calling this, poll get_list_status every 15-30 seconds until processing_status is 'completed' or 'failed', then call export_list. You must have a campaign_id first. Call list_campaigns if you don't have one.
generate_sequenceFree
Generate a personalized cold email sequence for ONE lead. This is SYNCHRONOUS — the request takes 3-10 minutes because MachFive researches the prospect and crafts unique emails. Do NOT retry if it seems slow; wait for the response. You must have a campaign_id first. Call list_campaigns if you don't have one. If the request times out, use the returned list_id with get_list_status and export_list to recover results.
get_list_statusFree
Check the processing status of a lead list. Use this to POLL after calling generate_batch. Call every 15-30 seconds until processing_status is 'completed' or 'failed'. When completed, call export_list. When failed, submit a new batch.
list_campaignsFree
List campaigns in the user's MachFive workspace. CALL THIS FIRST before generate_sequence or generate_batch — you need a campaign ID to generate emails. If the user hasn't specified a campaign, call this and ask them to pick one. Returns JSON array of campaigns with id, name, and created_at. Use the 'id' field as campaign_id in generate calls.
list_listsFree
List lead lists (batch jobs) in the user's MachFive workspace. Useful for browsing past batches, checking what's in progress, or finding a list_id to export. Results are ordered newest first.

Public scan report

scanner v0.1.10 · 2026-09-28 · same rubric, same numbers if you re-run it

1 high

–Code scanremote-only server, no package to scann/a
Live reliabilityremote reachable in 624ms20/20
Tool poisoning6 tool descriptions checked15/15
Auth qualityopen endpoint exposes 1 write-action tools with no auth3/15
Maintenancelast push 211 days ago4/15
Maintainer identityregistry namespace matches repository owner; GitHub account older than a year8/10

Findings (1)

highWrite-action tools reachable without authenticationauth.open-write

Overall 67/100. Components that don't apply are left out of the denominator. Any critical finding is an F.Rubric Appeal a finding JSON

How Cold Email compares

Against every graded Sales and outbound MCP server, from our own scans and uptime checks. Updated after each scan run.

Safety score: 67/100; higher than 25% of 876 Sales and outbound servers
Tools: 6; the typical Sales and outbound server has 8
Tools that change things: 17%; typical: 11%. Fewer write tools means less an agent can break
GitHub stars: 2; more than 80% of 420 Sales and outbound servers

What its tools let an agent do: 4 read · 2 create

Install Cold Email in Claude Code, Cursor or VS Code

claude mcp add --transport http cold-email https://mcp.machfive.io/mcp/{api_key}

Add to Cursor

What the publisher says

From the Cold Email repository's README, as published. We do not edit it. Read it on GitHub

MachFive MCP Server

What is MachFive MCP Server?

MCP (Model Context Protocol) is an open standard that lets AI assistants like Claude connect to external apps. Think of it as a universal translator between AI and software.

MachFive MCP Server is a connector that lets your AI assistants communicate directly with your MachFive account. Your AI can list campaigns, generate hyper-personalized cold email sequences, manage lead lists, and export results — all through natural conversation.

Instead of logging into MachFive, uploading CSVs, and waiting for results, you can simply tell your AI what you need:

"Generate a 3-email sequence for jane@acme.com using my SaaS Founders campaign"
"Show me my MachFive campaigns"
"Submit these 50 leads for batch processing"
"Check the status of my latest batch and export the results"

Your AI understands the request, connects to MachFive through MCP, and executes the action — all in seconds.

How to Set Up MachFive MCP

Step 1: Get Your API Key (2 min)

Log in to your MachFive account at app.machfive.io
Go to Settings → API Keys
Click Create API Key
Copy your key and store it securely

⚠️ Keep this key private — it's like a password to your MachFive account.

Step 2: Connect Your AI Client

Option A: Claude Desktop (Easiest)

Open the Claude Desktop app
Go to Settings → Connectors
Click Add custom connector
Enter:

Name: MachFive
Remote MCP server URL: https://mcp.machfive.io/mcp/YOURAPIKEY

Replace YOURAPIKEY with the API key you created
Click Add — no restart needed!

Option B: Claude Desktop (Config File)

If you prefer editing the config file directly:

Go to Settings → Developer → Edit Config
Add this to your config file (replace YOURAPIKEY):

{
  "mcpServers": {
    "machfive": {
      "url": "https://mcp.machfive.io/mcp",
      "headers": {
        "Authorization": "Bearer YOUR_API_KEY"
      }
    }
  }
}

Save and restart Claude Desktop

Option C: Cursor

Open Cursor → Settings (⌘ + ,)
Search for MCP
Click Edit in settings.json
Add the following (replace YOURAPIKEY):

{
  "mcpServers": {
    "machfive": {
      "url": "https://mcp.machfive.io/mcp",
      "headers": {
        "Authorization": "Bearer YOUR_API_KEY"
      }
    }
  }
}

Save and restart Cursor

Option D: n8n (AI Agents & Workflows)

For automating workflows with AI agents in n8n:

Add the MCP Client node to your workflow
Select Streamable HTTP as the transport option
Enter the URL: https://mcp.machfive.io/mcp/YOURAPIKEY
Connect to your AI agent node

Option E: Other MCP Clients

For any MCP-compatible client, use the URL with your API key:

https://mcp.machfive.io/mcp/YOUR_API_KEY

This URL works with any client that supports Streamable HTTP transport.

Step 3: Test It! (30 sec)

Open your AI assistant and try:

"List my MachFive campaigns"

If you see your campaign list, you're connected! 🎉

Authentication

MachFive MCP supports three authentication methods:

The Bearer prefix is optional for the Authorization header.

Available Tools

MachFive MCP provides 6 tools for cold email generation:

📋 Campaigns

Shortened. The full README is on GitHub.

Nothing above is checked by us. What we check is on the safety report.

Cold Email: common questions

Is Cold Email MCP server safe?: With care: it is graded C, so read the findings first (67/100). Read the Cold Email safety report
How do I install Cold Email?: It runs remotely at mcp.machfive.io. Add it to Claude Code, Cursor, VS Code or Claude Desktop with the snippets above, or call it through the mcp.market gateway without installing anything.
Does Cold Email need an API key?: Not as far as the registry entry and our scan can tell: no credentials are declared or required.
Is Cold Email maintained?: The last commit was 248 days ago (2026-03-01). The latest release is v1.0.1.
What can I use instead of Cold Email?: Servers from other publishers that do the same job: OpenLeads MCP server, Agent Cold Email MCP server and Generect MCP server.
How does Cold Email compare with other Sales and outbound MCP servers?: safety score 67/100 (higher than 25% of 876 Sales and outbound servers); tools 6 (the typical Sales and outbound server has 8); tools that change things 17% (typical: 11%. Fewer write tools means less an agent can break). Full comparison.

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Run it through the gateway

With the gateway added, ask your agent for it by name:

agent prompt

call io.github.Bluecraft-AI/cold-email → export_list

Free per call. Metered, capped by your key, logged for reliability.

Add the gateway (gw.mcp.market)

Rating: —
Safety grade: C · 67/100
Stars: 2
Downloads/wk: –
Price: Free
Licence: MIT
Transport: Remote
Uptime: Checking soon
Version: 1.0.1
Category: Sales and outbound
Last release: 2026-03-01

Endpoint

https://mcp.machfive.io/mcp/{api_key}

streamable-http

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