---
title: "cold-email-writer"
description: "Write short B2B cold emails, subject lines and follow-ups from your offer, audience and proof. Review the brief, compare three variants and export a sequence. It writes text only: it never sends email or finds contacts. "
canonical: https://agentpluginsdirectory.com/plugins/cold-email-writer
last-updated: 2026-10-12
---

# cold-email-writer
Write short B2B cold emails, subject lines and follow-ups from your offer, audience and proof. Review the brief, compare three variants and export a sequence. It writes text only: it never sends email or finds contacts. By ASTUDIO.
- Slug: cold-email-writer
- Publisher: ASTUDIO
- Repository: https://github.com/AStudio-Team/openai-plugin-tools
- Manifest: cold-email-writer/plugin.json
- Version: 1.0.0
- License: MIT
- Category (editorial): other
- Skills: 1 (cold-email-writer)
- MCP servers: 1 (cold-email-writer)
- Stars: 0
- Repository created: 2026-10-10
- Repository last pushed: 2026-10-12
- Publisher type: Organization
- Listing: https://agentpluginsdirectory.com/plugins/cold-email-writer
- Schema: https://agent-plugins.org/schemas/1.0.0/plugin.schema.json

## What cold-email-writer does, in the publisher's words

A human-guided MCP App that turns an approved B2B sales brief into three cold email sequence variants, validates the copy, records an explicit selection, and exports the chosen sequence as Markdown or CSV. It writes text only and never sends email or finds contacts.

The local server listens on port 8790 by default. Its MCP endpoint is /mcp, health endpoints are /health and /ready, and public product pages start at /.

Production requires APPROVAL_HMAC_KEY to contain at least 32 characters. The deployment supplies APPROVAL_HMAC_KEY through its environment file; the service refuses to start without it.

From the project README, punctuation lightly normalized. Full text: https://raw.githubusercontent.com/AStudio-Team/openai-plugin-tools/HEAD/cold-email-writer/README.md

## MCP servers

- cold-email-writer: transport: streamable-http; url: https://www.astudio.agency/openai-plugins/cold-email-writer/mcp

Read from the plugin's own mcp.json. Environment variable names only, never values.