One endpoint.
Every tool your agents need.

Federate your MCP servers once. Claude, Cursor and Codex see three tools instead of three hundred — and compose them in a locked-down sandbox.

Get your endpoint See how it works

Connect Linear, Notion, Sentry — or any MCP server, in one click

Linear

Atlassian

Sentry

Vercel

Stripe

Intercom

Hugging Face

Netlify

Prisma Postgres

Box

Figma

Airtable

ClickUp

Datadog

Miro

Shopify

Gmail

Google Drive

Google Sheets

Discord

Linear

Atlassian

Sentry

Vercel

Stripe

Intercom

Hugging Face

Netlify

Prisma Postgres

Box

Figma

Airtable

ClickUp

Datadog

Miro

Shopify

Gmail

Google Drive

Google Sheets

Discord

Notion

Asana

Supabase

Neon

PayPal

Webflow

Cloudflare Docs

PostHog

Cloudflare Observability

GitHub

HubSpot

Zapier

GitLab

PagerDuty

Todoist

Mixpanel

Google Calendar

Google Docs

Google Chat

Wix

Notion

Asana

Supabase

Neon

PayPal

Webflow

Cloudflare Docs

PostHog

Cloudflare Observability

GitHub

HubSpot

Zapier

GitLab

PagerDuty

Todoist

Mixpanel

Google Calendar

Google Docs

Google Chat

Wix

execute({ code })

1const issues = await tools.linear_mcp.list_issues({ state: "In Review" });
2const docs = await Promise.all(
3  issues.slice(0, 5).map(i => tools.notion.search({ query: i.identifier }))
4);
5return issues.slice(0, 5).map((i, n) => ({ id: i.identifier, specs: docs[n].length }));

● completed6 tool calls412 ms0 LLM round-trips

MCP tools exposed

<1.2k

prompt tokens

secrets in the sandbox

How it works

Less surface.
More reach.

Federate

Compose

Agents write small programs against every tool at once, in isolated QuickJS. No fetch, no fs, no process.

Approve

Never, always or conditional policies per tool. Runs pause mid-program and resume exactly where they stopped.

Author

Agents deploy reusable tools of their own. You keep the source, the metrics and the kill switch.

Connect once. Reach everything.

Start with Keystone

One endpoint.Every tool your agents need.