Is io.github.AddisonHoff/sendsets safe to use?

io.github.AddisonHoff/sendsets has no known CVEs as of the latest MCPpedia security scan. Authentication requirements were not detected automatically - check the project's documentation before connecting in a shared environment. Licensed under Apache-2.0.

How do I install io.github.AddisonHoff/sendsets?

io.github.AddisonHoff/sendsets supports copy-paste install configs on its MCPpedia page for Claude Desktop, Cursor, and Claude Code. Scroll to the Quick Install section and select your client.

What can io.github.AddisonHoff/sendsets do?

io.github.AddisonHoff/sendsets provides 5 tools: Campaigns, Mailboxes, Runs, CLI, License. See the full tools list on the server page for descriptions and parameters.

What AI clients work with io.github.AddisonHoff/sendsets?

io.github.AddisonHoff/sendsets is compatible with claude-desktop, cursor, claude-code. It uses http transport.

Is io.github.AddisonHoff/sendsets actively maintained?

io.github.AddisonHoff/sendsets is recently maintained - last commit was 48 days ago. It has 3 GitHub stars.

io.github.AddisonHoff/sendsets

skills

Cold email API for AI agents: connect mailboxes, warm up, run campaigns and handle replies.

3 5 tools GitHub npm

No known CVEs

Apache-2.0 license

Maintained

Last commit 48d ago

Works with most clients

Transport: http

5 tools · ~192 tok

Grade A · 0.1% of 200K ctx

MCPpedia last refreshed this data 1d ago

Edit this pageView history

io.github.AddisonHoff/sendsets is an MCP server that cold email API for AI agents: connect mailboxes, warm up, run campaigns and handle replies. Its tool list has not been published yet over http, requires no API key, and scores 82/100 on MCPpedia's security, maintenance and efficiency rubric.

Communication AI / ML

Step 1

Install in your client

Config is the same across clients - only the file and path differ.

Supported in Claude Desktophttp · Node 18+

Paste into ~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "sendsets": {
      "url": "https://api.sendsetsapi.com/v1/mcp"
    }
  }
}

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[![MCPpedia Score](https://mcppedia.org/api/badge/io-github-addisonhoff-sendsets)](https://mcppedia.org/s/io-github-addisonhoff-sendsets)

Read me

What io.github.AddisonHoff/sendsets does

Cold email API for AI agents: connect mailboxes, warm up, run campaigns and handle replies.

Test This Server

This server supports HTTP transport. Be the first to test it - help the community know if it works.

Loading README…

Scored, not listed

Why this score

Five weighted categories - click any category to see the underlying evidence.

Score breakdown

82/100across 5 weighted dimensions

How we score →

0255075100

−18

Security

Maintenance

Efficiency

Documentation

Compatibility

Categoriesclick a row to see evidence

Security

OSV.dev

No known CVEs.

Checked skills against OSV.dev.

Inventory

Tools (5)

Click any tool to inspect its schema.

~192 tokens total

Community

Reviews

Be the first to review

Have you used this server?

Share your experience - it helps other developers decide.

How easy was setup?Did it work reliably?How was the documentation?

Frequently Asked Questions

Is io.github.AddisonHoff/sendsets safe to use?: io.github.AddisonHoff/sendsets has no known CVEs as of the latest MCPpedia security scan. Authentication requirements were not detected automatically - check the project's documentation before connecting in a shared environment. Licensed under Apache-2.0.
How do I install io.github.AddisonHoff/sendsets?: io.github.AddisonHoff/sendsets supports copy-paste install configs on its MCPpedia page for Claude Desktop, Cursor, and Claude Code. Scroll to the Quick Install section and select your client.
What can io.github.AddisonHoff/sendsets do?: io.github.AddisonHoff/sendsets provides 5 tools: Campaigns, Mailboxes, Runs, CLI, License. See the full tools list on the server page for descriptions and parameters.
What AI clients work with io.github.AddisonHoff/sendsets?: io.github.AddisonHoff/sendsets is compatible with claude-desktop, cursor, claude-code. It uses http transport.
Is io.github.AddisonHoff/sendsets actively maintained?: io.github.AddisonHoff/sendsets is recently maintained - last commit was 48 days ago. It has 3 GitHub stars.

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Communication AI / ML

Step 1

Install in your client

Config is the same across clients - only the file and path differ.

Supported in Claude Desktophttp · Node 18+

Paste into ~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "sendsets": {
      "url": "https://api.sendsetsapi.com/v1/mcp"
    }
  }
}

Are you the author?

Add this badge to your README to show your security score and help users find safe servers.

Embed in your READMEAbout badges →

[![MCPpedia Score](https://mcppedia.org/api/badge/io-github-addisonhoff-sendsets)](https://mcppedia.org/s/io-github-addisonhoff-sendsets)

Read me

What io.github.AddisonHoff/sendsets does

Cold email API for AI agents: connect mailboxes, warm up, run campaigns and handle replies.

Test This Server

This server supports HTTP transport. Be the first to test it - help the community know if it works.

README

Sendsets: the cold email API for AI agents

Sendsets gives AI agents a programmable way to run cold email. An agent (Claude Code, Codex, Cursor, Gemini CLI, ChatGPT, or your own code) can connect sending mailboxes, warm them up, build and launch outbound campaigns, add leads, and read and answer replies through an MCP server, a CLI, or a REST API instead of a sales dashboard.

This repository is the public, agent-facing home of Sendsets:

What	Where
Remote MCP server	`https://api.sendsetsapi.com/v1/mcp` (streamable HTTP, OAuth 2.1 or API key)
Agent skills (`SKILL.md`)	`skills/send-cold-email`, `skills/sendsets`, `skills/sendsets-cli`
Claude Code plugin marketplace	`.claude-plugin/marketplace.json`
Codex plugin marketplace	`.agents/plugins/marketplace.json`, `.codex-plugin/plugin.json`
Agent Plugins manifest	`plugin.json`, `mcp.json` (agent-plugins.org)
Gemini CLI extension	`gemini-extension.json`
MCP Registry manifest	`server.json` (`io.github.AddisonHoff/sendsets`)
OpenAPI 3.1 spec	openapi.json
Docs	docs.sendsetsapi.com

What an agent can do with it

The MCP server and the REST API expose the same service-layer tools. What a credential can see is limited by the scopes it was granted.

Campaigns: create a draft, add and edit sequence steps, pick sender mailboxes, view leads, logs and stats, start and stop
Leads and contacts: add, search, tag, bulk edit, read timelines and sent mail, manage segments
Mailboxes: list and inspect connected mailboxes, adjust limits, toggle warmup, set tracking domains, check warmup standing
Inbox and replies: list and read threads, draft and send replies, label, snooze, cancel scheduled sends
Runs: durable, idempotent, preflighted campaign runs (create_run, get_run, list_runs, cancel_run)
Suppressions, analytics, webhooks: manage the do-not-contact list, read dashboard analytics, manage signed webhooks

Send-class tools (start_campaign, compose_email, send_reply, and an autonomous create_run) go through a credential-bound policy. A call returns executed, awaiting_approval (a person approves it in the dashboard within 30 minutes), or blocked. Approval can never override a missing opt-out, a suppression, or a mailbox health check.

Connect the MCP server

The server advertises OAuth 2.1 protected-resource metadata (RFC 9728) and supports dynamic client registration, so MCP clients that speak OAuth sign you in through the browser with no key to paste. A static ssk_ API key from the dashboard works too, as Authorization: Bearer ssk_....

Claude Code

claude mcp add --transport http sendsets https://api.sendsetsapi.com/v1/mcp

Or install the plugin, which adds the MCP server and the skills together:

/plugin marketplace add AddisonHoff/sendsets
/plugin install sendsets@sendsets

Claude (claude.ai and Claude Desktop): Settings > Connectors > Add custom connector, URL https://api.sendsetsapi.com/v1/mcp.

Codex

codex plugin marketplace add AddisonHoff/sendsets     # MCP server + skills as a plugin

or just the MCP server:

codex mcp add sendsets --url https://api.sendsetsapi.com/v1/mcp
codex mcp login sendsets

Cursor (~/.cursor/mcp.json)

{
  "mcpServers": {
    "sendsets": { "url": "https://api.sendsetsapi.com/v1/mcp" }
  }
}

**VS Code

... View full README on GitHub

Loading README…

Scored, not listed

Why this score

Five weighted categories - click any category to see the underlying evidence.

Score breakdown

82/100across 5 weighted dimensions

How we score →

0255075100

−18

Security

Maintenance

Efficiency

Documentation

Compatibility

Categoriesclick a row to see evidence

Security

OSV.dev

No known CVEs.

Checked skills against OSV.dev.

Inventory

Tools (5)

Click any tool to inspect its schema.

~192 tokens total

Community

Reviews

Be the first to review

Have you used this server?

Share your experience - it helps other developers decide.

How easy was setup?Did it work reliably?How was the documentation?

Frequently Asked Questions

Is io.github.AddisonHoff/sendsets safe to use?: io.github.AddisonHoff/sendsets has no known CVEs as of the latest MCPpedia security scan. Authentication requirements were not detected automatically - check the project's documentation before connecting in a shared environment. Licensed under Apache-2.0.
How do I install io.github.AddisonHoff/sendsets?: io.github.AddisonHoff/sendsets supports copy-paste install configs on its MCPpedia page for Claude Desktop, Cursor, and Claude Code. Scroll to the Quick Install section and select your client.
What can io.github.AddisonHoff/sendsets do?: io.github.AddisonHoff/sendsets provides 5 tools: Campaigns, Mailboxes, Runs, CLI, License. See the full tools list on the server page for descriptions and parameters.
What AI clients work with io.github.AddisonHoff/sendsets?: io.github.AddisonHoff/sendsets is compatible with claude-desktop, cursor, claude-code. It uses http transport.
Is io.github.AddisonHoff/sendsets actively maintained?: io.github.AddisonHoff/sendsets is recently maintained - last commit was 48 days ago. It has 3 GitHub stars.