Newsletter growth loops, welcome-sequence architecture, subject-line and list-metric guidance.
Newsletter growth loops, welcome-sequence architecture, subject-line and list-metric guidance. Exposed over MCP by the newsletter mcp server, that capability becomes something an assistant can invoke while it works, not something you go and do afterwards.
Platform followers are rented; the list is owned. But most creators (and their AI agents) treat the newsletter as a broadcast afterthought: no welcome sequence, no growth loop, monetization guesses based on list size instead of engagement.
Everything the assistant can do here goes through one of these:
get_growth_loop — 5 growth loops (lead magnet, social repurpose, cross-promo, referral, sponsorship swap) with when each wins and its failure modeget_welcome_sequence — The 6-email architecture: deliver → receipt → quick win → segment → soft offer → closeaudit_subject_line — PASS/NEEDS WORK: truncation length, spam phrases, fake Re:, specificityinterpret_list_metric — Healthy/warning ranges + diagnostics for opens, clicks, growth, unsubs, repliesget_monetization_readiness — Given your list size + engagement: readiness verdicts for own product, per-click sponsorships, flat placementsget_full_pack — Everything in one payloadInstallation goes through your MCP client rather than a global install: point it at newsletter-growth-mcp on npm and it is fetched when the client starts. The copy-paste blocks for Claude Desktop, Claude Code and Cursor are further down this page.
Among the team communication options, the useful question is rarely "what can it do" but "what does it cost you to run" — permissions, credentials, and how much of your context its toolset consumes. Newsletter's toolset — get_growth_loop, get_welcome_sequence, audit_subject_line and 3 more — is a fair guide to whether it matches your workflow. It is maintained by closermethod; worth a glance at recent repository activity before you build anything load-bearing on it.
This entry was verified against Newsletter's own documentation before publication; SyncDev keeps the directory reviewed rather than auto-generated.
| Tool | What it does |
|---|---|
| get_growth_loop | 5 growth loops (lead magnet, social repurpose, cross-promo, referral, sponsorship swap) with when each wins and its failure mode |
| get_welcome_sequence | The 6-email architecture: deliver → receipt → quick win → segment → soft offer → close |
| audit_subject_line | PASS/NEEDS WORK: truncation length, spam phrases, fake Re:, specificity |
| interpret_list_metric | Healthy/warning ranges + diagnostics for opens, clicks, growth, unsubs, replies |
| get_monetization_readiness | Given your list size + engagement: readiness verdicts for own product, per-click sponsorships, flat placements |
| get_full_pack | Everything in one payload |
Claude Desktop config:
```json
{ "mcpServers": { "newsletter-growth": { "command": "npx", "args": ["newsletter-growth-mcp"] } } }Configuration as documented by the project. Restart the client after saving.
Your assistant inside the workspace — read channels, search history, post messages and tame the noise.
Inbox intelligence — search, read, draft and send Gmail through your assistant with OAuth auto-setup.
Read and write Jira, Confluence, Bitbucket, JSM and Compass from your AI client — with your own permissions.
Read and send Telegram messages through your assistant — chats, channels and history via the client API.
Enables Discord bot integration with Model Context Protocol (MCP) compatible applications like Claude Desktop.
Exposes REST APIs defined by OpenAPI specifications as Model Context Protocol (MCP) tools, facilitating seamless integration into MCP-based workflows.