---
title: "sendsets"
description: "Cold email for AI agents: the Sendsets MCP server plus skills for sending cold email sequences and running outbound campaigns."
canonical: https://agentpluginsdirectory.com/plugins/sendsets
last-updated: 2026-11-13
---

# sendsets
Cold email for AI agents: the Sendsets MCP server plus skills for sending cold email sequences and running outbound campaigns.
- Slug: sendsets
- Publisher: Sendsets
- Repository: https://github.com/hashgraph-online/awesome-codex-plugins
- Manifest: plugins/AddisonHoff/sendsets/plugin.json
- Version: 1.0.0
- License: Apache-2.0
- Category (editorial): other
- Skills: 3 (send-cold-email, sendsets-cli, sendsets)
- MCP servers: 1 (sendsets)
- Stars: 1568
- Repository created: 2026-03-28
- Repository last pushed: 2026-11-13
- Publisher type: Organization
- Listing: https://agentpluginsdirectory.com/plugins/sendsets
- Schema: https://agent-plugins.org/schemas/1.0.0/plugin.schema.json

## What sendsets does, in the publisher's words

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:

Sign up at app.sendsetsapi.com. Free for up to 10 mailboxes.

- 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

From the project README, punctuation lightly normalized. Full text: https://raw.githubusercontent.com/hashgraph-online/awesome-codex-plugins/HEAD/plugins/AddisonHoff/sendsets/README.md