Open source · MCP-native · POC

Newsletters that
talk back.

Stop reading walls of text. Start having conversations with your news.
Ask what you missed. Expand what interests you. Skip the rest.

MCPProtocol
RustBackend
ReactUI
AuthZENSecurity
How it works

Your newsletter is a conversation

Your LLM tells you when new content arrives. You just respond.

Claude · Ferrisletter MCP

The LLM notifies you. Click a topic to expand — just like in your chat client.

Traditional Newsletter
newsletter@weekly-digest.com
Your Weekly AI Digest #147
⋮ 2000+ more words

Long. Static. All or nothing.

vs
Ferrisletter
Scheduled: weekly digest
ResearchNew arch beats SOTA with fewer params
OSSLLM framework goes v3.0
IndustryAI chip merger shakes up market
Two startups combine to create a serious competitor to NVIDIA's dominance in training hardware...
Skip industry, more on the research

Delivered to you. Interactive. On your terms.

Features

Not another newsletter tool.
A new way to stay informed.

Expand on demand

Every topic is a one-liner. Tap to go deeper. No scrolling through content you don't care about.

Catch-up in seconds

"What did I miss this week?" Get a smart recap of everything since your last visit. Days, not paragraphs.

Delivered to your chat

Scheduled delivery via your LLM client. The newsletter shows up like a message — zero effort.

Your preferences, your rules

Choose your topics, set summary length, pick your tone. The same content, shaped to how you consume it.

🔍

Search across issues

"What were the big open source releases last month?" Search across all past issues by topic, date, or keyword.

MCP-native, open source

Built on the Model Context Protocol. Works with Claude, ChatGPT, and any MCP-compatible client.

How it connects

Your LLM does the talking

Your client connects to our server. We handle the rest.

💬

Your LLM

Claude, ChatGPT, or any MCP client — where you already work.

requests

Ferrisletter

Our MCP server delivers curated, tagged content on demand.

delivers
🌐

Fresh content

Sourced, summarized, and ready — so you don't have to be.

Tech Stack

Built with opinionated choices

Every layer chosen for a reason. Open source all the way down.

ProtocolMCP

Model Context Protocol — the open standard for LLM tool integration

BackendRust

Fast, memory-safe, single-binary deployment. Built for reliability.

UIReact

MCP Apps rendered in sandboxed iframes. Rich, interactive views.

AuthAuthZEN + FerrisKey

Standard-based authorization with PDP/PEP. Rust-powered IAM.

DatabasePostgreSQL

Battle-tested. Stores content, subscriptions, and preferences.

ContentAI Pipeline

Automated scraping, LLM-assisted tagging, ready to serve on demand.

Early access

The future of newsletters
is a conversation.

Ferrisletter is open source and under active development. Star the repo, follow the progress, or contribute.

Star on GitHub