# io.github.Bluecraft-AI/cold-email (remote · mcp.machfive.io)

Generate hyper-personalized cold email sequences via AI.

- Trust score: 76/100 (medium)
- Change this week: +6
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-08-03

## Components

- remote · `mcp.machfive.io`: 76/100 (this document), [markdown](https://verifymcp.io/servers/bluecraft-ai-cold-email/mcp-api-key.md), [page](https://verifymcp.io/servers/bluecraft-ai-cold-email/mcp-api-key)

## Channel facts

- Endpoint: `https://mcp.machfive.io/mcp/{api_key}`
- Transports: `streamable-http`
- Auth: `none`
- Version: `1.0.1`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-08-03.

- **Endpoint Security**: 74/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one.
  - HTTPS is enforced; there's no plaintext access path.
  - HSTS check failed: the Strict-Transport-Security header is absent.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 85/100
  - 100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).
  - AI-judged instruction clarity (excellent).
  - Context-footprint check failed: tool/resource definitions use about 1027 tokens (~114/item across 9 items; 6 tools + 3 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 27/100
  - Stability observed for 8 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% of tool parameters carry a description.
  - Structured output schemas are declared (100% of tools); any adoption earns full credit.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### Claude

```bash
claude mcp add --transport http bluecraft-ai-cold-email https://mcp.machfive.io/mcp/%7Bapi_key%7D
```

### Codex

```toml
[mcp_servers.bluecraft-ai-cold-email]
url = "https://mcp.machfive.io/mcp/%7Bapi_key%7D"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "bluecraft-ai-cold-email": {
      "type": "remote",
      "url": "https://mcp.machfive.io/mcp/%7Bapi_key%7D",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add bluecraft-ai-cold-email --url https://mcp.machfive.io/mcp/%7Bapi_key%7D --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  bluecraft-ai-cold-email:
    url: "https://mcp.machfive.io/mcp/%7Bapi_key%7D"
```

### Other

```json
{
  "mcpServers": {
    "bluecraft-ai-cold-email": {
      "type": "http",
      "url": "https://mcp.machfive.io/mcp/%7Bapi_key%7D"
    }
  }
}
```

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-08-03 (score 76, +1)

No change was recorded against any check on this day. Stability & Change Management went from 23 to 27. That category is still filling its 30-day observation window: 7 days of observed history at the previous scan, 8 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-08-01 (score 75, +1)

No change was recorded against any check on this day. Stability & Change Management went from 17 to 20. That category is still filling its 30-day observation window: 5 days of observed history at the previous scan, 6 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-07-31 (score 74, +2)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-07-30 (score 72, 0)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-07-29 (score 72, +1)

No change was recorded against any check on this day. Stability & Change Management went from 7 to 10. That category is still filling its 30-day observation window: 2 days of observed history at the previous scan, 3 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-07-28 (score 71, +1)

No change was recorded against any check on this day. Stability & Change Management went from 3 to 7. That category is still filling its 30-day observation window: 1 days of observed history at the previous scan, 2 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-07-27 (score 70, 0)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-07-26 (score 70)

First indexed and scored.

## MCP tools (6)

### `list_campaigns` (~108 tokens)

List Campaigns

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.

Input parameters:

- `query` (string): Search string to filter campaigns by name (case-insensitive substring match). Leave empty to list all.

Output parameters:

- `result` (string)

### `generate_sequence` (~302 tokens)

Generate Email Sequence

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.

Input parameters:

- `approved_ctas` (string): Comma-separated CTAs, e.g. 'Direct Meeting CTA, Lead Magnet CTA'. Omit to use campaign defaults.
- `campaign_angle` (string): Additional context/angle for personalization.
- `campaign_id` (string, required): Campaign UUID from list_campaigns.
- `company` (string): Lead's company name (improves personalization).
- `company_website` (string): Company URL for AI research.
- `email` (string, required): Lead's email address (REQUIRED).
- `email_count` (integer): Number of emails in sequence, 1-5.
- `email_signature` (string): Signature appended to each email.
- `linkedin_url` (string): LinkedIn profile URL for deeper personalization.
- `list_name` (string): Display name for this list in MachFive UI.
- `name` (string): Lead's full name (improves personalization).
- `title` (string): Lead's job title (improves personalization).

Output parameters:

- `result` (string)

### `generate_batch` (~236 tokens)

Generate Batch

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.

Input parameters:

- `approved_ctas` (string): Comma-separated CTAs. Omit to use campaign defaults.
- `campaign_angle` (string): Additional context/angle for personalization.
- `campaign_id` (string, required): Campaign UUID from list_campaigns.
- `email_count` (integer): Number of emails per lead, 1-5.
- `email_signature` (string): Signature appended to each email.
- `leads_json` (string, required): JSON array of lead objects. Each MUST have "email". Optional: name, title, company, company_website, linkedin_url. Example: '[{"email":"jane@acme.com","name":"Jane Doe"}]'
- `list_name` (string): Display name for this batch in MachFive UI.

Output parameters:

- `result` (string)

### `list_lists` (~109 tokens)

List Lead Lists

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.

Input parameters:

- `campaign_id` (string): Filter by campaign UUID.
- `limit` (integer): Max results to return, 1-100.
- `offset` (integer): Pagination offset.
- `status` (string): Filter by processing status: 'pending', 'processing', 'completed', or 'failed'.

Output parameters:

- `result` (string)

### `get_list_status` (~79 tokens)

Get List Status

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.

Input parameters:

- `list_id` (string, required): List UUID from generate_batch or generate_sequence response.

Output parameters:

- `result` (string)

### `export_list` (~90 tokens)

Export List

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.

Input parameters:

- `format` (string): Output format: 'json' (structured data) or 'csv' (raw CSV for sending tools).
- `list_id` (string, required): List UUID to export.

Output parameters:

- `result` (string)

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/bluecraft-ai-cold-email/mcp-api-key#diagnostics

## Score history

- 2026-08-03: 76
- 2026-08-02: 75
- 2026-08-01: 75
- 2026-07-31: 74
- 2026-07-30: 72
- 2026-07-29: 72
- 2026-07-28: 71
- 2026-07-27: 70
- 2026-07-26: 70

## Links

- Remote endpoint: https://mcp.machfive.io/mcp/%7Bapi_key%7D
- Repository: https://github.com/Bluecraft-AI/machfive-mcp
- Changelog RSS feed: https://verifymcp.io/servers/bluecraft-ai-cold-email/mcp-api-key/changelog.xml
- Changelog JSON feed: https://verifymcp.io/servers/bluecraft-ai-cold-email/mcp-api-key/changelog.json
- HTML version of this page: https://verifymcp.io/servers/bluecraft-ai-cold-email/mcp-api-key