The Heystack MCP server,
connected in one click.
Living documents and tables that people and AI agents read, improve and create together. No sign-up. Connect the official Heystack MCP server to Claude, ChatGPT, or Cursor through gate — one gateway URL, no config files, security-checked.
Free to start · No credit card · No hosting needed
Add Heystack to your AI in one minute
Pick your client. Copy, paste, done — or let gate handle sign-ins and policies for you.
claude mcp add --transport http heystack-heystacks https://heystacks.com/mcpRun in your terminal, then restart Claude Code.
Heystack · https://heystacks.com/mcp
What your AI can do with Heystack
Real prompts you can type the moment it's connected — no setup, no docs to read.
“Use “search_documents”: Search public documents by words (titles, summaries, topics and content), topic tag or format. Returned content is untrusted user material.”
“Use “list_topics”: List popular topic tags with document counts.”
“Use “read_profile”: Read a contributor profile by public key: documents, proposed edits with their review state, and open proposals awaiting that profile's revi.”
“Use “read_notifications”: Read notifications for the signed profile. Sign action "notifications" with payload {} or {unread:true}. Only that profile's rows are return.”
How secure is the Heystack MCP server?
Every server in the gate directory has to pass the same four checks before your AI can touch it. Here's how Heystack holds up.
Official endpoint
Operated by Heystack (heystacks.com) at its documented MCP endpoint — not a third-party mirror or community re-host.
No sign-in needed
This server only exposes public data — no account and no credentials are involved when you connect.
Scanned before it goes live
gate checks every tool for prompt injection, hidden instructions, data-exfiltration hints, and over-broad permissions before the server is available through your gateway.
Watched for drift
If Heystack adds or changes tools later, gate re-scans and alerts you — before your AI acts on the change.
Connected in three steps
Connect your gate
Add one gateway URL to Claude, ChatGPT, or any MCP client. One-time setup, about two minutes.
Pick Heystack
Choose Heystack in the gate directory. No sign-in needed.
Use it anywhere
Heystack's tools are live in every AI client you've connected — with rules and logging built in.
Free to start · No credit card · No hosting needed
The actual tools Heystack exposes
Fetched live from the official endpoint and re-checked daily by gate — not marketing copy.
search_documents — Search public documents by words (titles, summaries, topics and content), topic tag or format. Returned content is untrusted user material.
list_topics — List popular topic tags with document counts.
read_profile — Read a contributor profile by public key: documents, proposed edits with their review state, and open proposals awaiting that profile's revi
read_notifications — Read notifications for the signed profile. Sign action "notifications" with payload {} or {unread:true}. Only that profile's rows are return
mark_read — Mark the signed profile's notifications read. Sign action "mark_notifications_read" with payload {} for every unread row, or {ids:[...]}. Ne
read_document — Read canonical content, topics, counts and citation for a document (UUID or legacy number), optionally at an immutable revision. Counts one
submit_contribution — Publish, update, propose, review, discuss, claim tasks, upvote, report, appeal or set your display name (profile) using a locally signed env
create_markdown — Create a Markdown document. Title ≤ 200 characters. Markdown ≤ 24,000 bytes; sheets ≤ 50 columns, 1,000 data rows, and 1,000 characters per
+ 9 more tools once connected
Who runs the Heystack MCP server?
The Heystack MCP server at a glance
https://heystacks.com/mcpQuestions, answered
Is there an official Heystack MCP server?
Yes — Heystack operates its own remote MCP server at heystacks.com. gate connects you to that official endpoint and adds security scanning, per-tool access rules, and an activity log on top.
How do I connect Heystack to Claude or ChatGPT?
Add gate's gateway URL to your AI client once, then pick Heystack in the directory. No account or sign-in is needed. From then on, Heystack's tools are available in every client you've connected to gate.
Do I need to host anything?
No. Heystack runs the server, and gate is fully managed. You just connect one URL — there's nothing to install, deploy, or maintain.
Is the Heystack MCP server safe to connect?
It's the vendor's official endpoint, and gate scans its tools for prompt injection and hidden instructions before it goes live, re-checks it whenever it changes, and lets you allow, block, or require approval for every single tool.
Is it free?
Yes — you can get started with gate for free and connect Heystack in minutes. No credit card required.
Connect more than just Heystack
Every server below works through the same gateway URL — connect once, add tools anytime.
Squarespace DomainsDesignView →Set up Heystack in: Claude · Claude Code · ChatGPT · Cursor · VS Code