Let your agent run your newsletter through an open-source MCP
MailCheap, Marc Lou's open-source newsletter app, connects to Claude, ChatGPT and Grok Bot through MCP and to Claude Code, Codex and Cursor, so an agent can manage the list and send campaigns.
Source
@RoundtableSpace on X · 2026-10-17
Written in our own words. Credit to the original author. Link checked 2026-10-22.
What they did
MailCheap, Marc Lou's open-source newsletter app, connects to Claude, ChatGPT and Grok Bot through MCP and to Claude Code, Codex and Cursor, so an agent can manage the list and send campaigns.
Result (as claimed)
A cheaper beehiiv alternative where you pay only for emails sent.
Tools they used
Cost: Grok Bot: from $30/mo; Claude Code: from $17/mo.
Set it up
Pick one goal and metric
For example replies to outreach, ad ideas per week or landing page conversion.
Set up the tools
Open MailCheap, MCP, Claude, ChatGPT, Grok Bot, Claude Code. Load your offer, audience and examples of what already works.
Generate, then review
Have the agent research and draft. You approve every message, post or ad before it goes out.
Measure and iterate
Track the metric for a week, keep what works and feed the results back into the prompt.
Copy the full setup prompt
Paste into your agent and it will walk you through the setup, asking before anything that sends, posts or spends.
You are helping me set up this AI use case end to end in Claude Code. Goal: Let your agent run your newsletter through an open-source MCP What the original author did: MailCheap, Marc Lou's open-source newsletter app, connects to Claude, ChatGPT and Grok Bot through MCP and to Claude Code, Codex and Cursor, so an agent can manage the list and send campaigns. Reported result (as claimed by the author): A cheaper beehiiv alternative where you pay only for emails sent. Source: https://x.com/RoundtableSpace/status/2111393027797193000 Tools they used: MailCheap, MCP, Claude, ChatGPT, Grok Bot, Claude Code Category: Marketing & growth Please: 1. Ask me 3 short questions about my situation (accounts I have, budget, what I want the output to look like). 2. Propose a step-by-step plan using these tools or cheaper alternatives, with the time and cost of each step. Use official pricing pages; say "check pricing" if unsure. 3. Then do the setup with me one step at a time, waiting for my OK before anything that sends messages, posts publicly, spends money or deletes data. 4. Finish with a checklist to run it again next time.
You are helping me set up this AI use case end to end in Codex. Goal: Let your agent run your newsletter through an open-source MCP What the original author did: MailCheap, Marc Lou's open-source newsletter app, connects to Claude, ChatGPT and Grok Bot through MCP and to Claude Code, Codex and Cursor, so an agent can manage the list and send campaigns. Reported result (as claimed by the author): A cheaper beehiiv alternative where you pay only for emails sent. Source: https://x.com/RoundtableSpace/status/2111393027797193000 Tools they used: MailCheap, MCP, Claude, ChatGPT, Grok Bot, Claude Code Category: Marketing & growth Please: 1. Ask me 3 short questions about my situation (accounts I have, budget, what I want the output to look like). 2. Propose a step-by-step plan using these tools or cheaper alternatives, with the time and cost of each step. Use official pricing pages; say "check pricing" if unsure. 3. Then do the setup with me one step at a time, waiting for my OK before anything that sends messages, posts publicly, spends money or deletes data. 4. Finish with a checklist to run it again next time.
You are helping me set up this AI use case end to end in Grok Bot. Goal: Let your agent run your newsletter through an open-source MCP What the original author did: MailCheap, Marc Lou's open-source newsletter app, connects to Claude, ChatGPT and Grok Bot through MCP and to Claude Code, Codex and Cursor, so an agent can manage the list and send campaigns. Reported result (as claimed by the author): A cheaper beehiiv alternative where you pay only for emails sent. Source: https://x.com/RoundtableSpace/status/2111393027797193000 Tools they used: MailCheap, MCP, Claude, ChatGPT, Grok Bot, Claude Code Category: Marketing & growth Please: 1. Ask me 3 short questions about my situation (accounts I have, budget, what I want the output to look like). 2. Propose a step-by-step plan using these tools or cheaper alternatives, with the time and cost of each step. Use official pricing pages; say "check pricing" if unsure. 3. Then do the setup with me one step at a time, waiting for my OK before anything that sends messages, posts publicly, spends money or deletes data. 4. Finish with a checklist to run it again next time.
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Guides for this use case
How to set up Grok Bot agents for real work · How to vibe code an app with Claude Code · How to use Claude Code and Codex together · How to use ChatGPT for real projects and everyday tasks
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