The context layer your agents are missing.

MCP gave agents a way to connect to your systems. Horizon gives you a way to control it.

1M+ FastMCP installs/day
70% of MCP servers worldwide
Enterprise-grade governance
Start FreeTalk to Us

Trusted in production

Cash App
Washington Nationals
WHOOP
Cisco
1Password
Dutch
NASA
CoinList
Ashby
Square
Meta
Eight Sleep

Running one MCP server is trivial.Running fifty across 5,000 employees is an unsolved problem.

Most companies are practicing “vibe governance.” They give agents tools that can bill customers, modify production databases, or send emails on behalf of executives—then write a polite prompt asking the agent to be careful.

Where do these servers live?
MCP requires OAuth 2.1, long-lived connections, and zero-downtime deploys. That's not a Kubernetes helm chart—it's a platform.
What's actually deployed?
One GitHub server. Then a Jira server. Then a fork. Then ten forks. Then nobody knows which version has the security patch.
Who can access what?
Permissions that work for humans don't work for agents. Your read-only analyst intern doesn't execute 10,000 queries at 3am.

The Platform

Four layers. One platform.

Deploy · Registry · Gateway · Agents

Horizon Deploy
Push code, get a live, governed endpoint in 60 seconds. CI/CD, scaling, monitoring, branch previews.
Learn more→
Horizon Registry
Your central catalog of MCP capabilities. Who owns them, what they expose, which versions are approved.
Learn more→
Horizon Gateway
If Registry is “what exists,” Gateway is “what's allowed.” RBAC, audit logs, usage visibility.
Learn more→
Horizon Agents
Business users get an agentic interface to your company without ever needing to learn what “MCP” is.
Learn more→

Turnkey Deployment

Push code. Get a URL.

Push to GitHub, get a production URL backed by OAuth 2.1 with dynamic client registration in minutes. Git-native CI/CD automatically updates your server on push to main. Preview deployments for PRs. Auto-scaling that zeros out when unused.

Learn about Horizon Deploy
Horizon Deploy
main
1
git push
2
Building
3
Deploying
4
Live
Waiting for deployment...

Push to main to trigger deployment

Organizational Discovery

Know what exists across your org.

Centralized catalog of all MCP servers—both internally built and imported third-party. Teams discover existing capabilities instead of rebuilding. Server authors control visibility. Stop duplicate infrastructure work.

Learn about Horizon Registry
Search MCP servers...
GitHub
GitHub
Issues, PRs, repos
847
Slack
Slack
Messages, channels
1203
Snowflake
Snowflake
Data warehouse
312
Salesforce
Salesforce
CRM, leads, accounts
156

Discover and connect to approved MCP servers across your organization

Governance Layer

Permissions on top of authentication.

URL plus system credentials isn't enough security. Gateway blocks access unless explicitly authorized—even if someone discovers a server URL and has system credentials. Define who can view, use, and edit each MCP server based on identity.

Learn about Horizon Gateway
Horizon Gateway
READY
Identity
Sales Agent
MCP Server
Salesforce CRM
Policy CheckAwaiting request

Fine-grained access control with full audit trail

Horizon Agents

AI that actually knows your business.

Compose MCP servers into purpose-built agents for your team. Connect Salesforce, GitHub, Snowflake, and your internal systems behind a single interface. New models make your agents smarter. New context makes them more capable.

Learn about Horizon Agents
Sales Agent
4 servers
Ask about your customers, deals, or data...
Context
SalesforceSalesforce
GitHubGitHub
SnowflakeSnowflake
SlackSlack

Business users get AI access without knowing what MCP is

Built by the FastMCP team

We've seen what breaks.

FastMCP launched days after Anthropic announced MCP and is now downloaded over a million times a day. 70% of production MCP servers run on it. We've watched companies go from “cool demo” to “wait, how do we actually deploy this?” hundreds of times. Horizon is every lesson, codified.

FastMCP Framework

If you know Python, you know FastMCP

The market-voted simplest way to author MCP servers. Write Python, push to GitHub, deploy to Horizon. Your servers inherit OAuth 2.1, governance, and observability automatically.

View FastMCP documentation
from fastmcp import FastMCP
mcp = FastMCP("My AI Tools")
@mcp.tool()
def get_customer(customer_id: str) -> dict:
    """Fetch customer data from internal CRM."""
    return db.customers.find(customer_id)
@mcp.tool()
def update_ticket(ticket_id: str, status: str) -> dict:
    """Update support ticket status."""
    return tickets.update(ticket_id, status=status)

Remix Servers

Compose tools. Constrain access.

Build virtual servers by combining tools from multiple sources into one governed endpoint. Your sales agent gets CRM read + Slack write. Your support agent gets ticket access + knowledge base. No more all-or-nothing permissions.

The key insight: agents can have narrower permissions than the humans who deploy them. You have broad access to your systems. Your agent only needs access to its specific job.

This is the difference between giving an agent a toolbox and giving it a scalpel.

The bottleneck isn't intelligence. It's context.

Your agents are already smart enough. What they lack is knowledge of your business: who your customers are, what your policies say, how your systems connect, what happened last quarter.

The next generation of AI advantage won't come from better models. It'll come from better context—and the infrastructure to deliver it safely.

That infrastructure is the context layer. And every company will need one.

Theory Venturescase-study

Because we've built these bespoke MCP tools with Horizon, I can stay in my LLM chat UI for a lot longer and get the information I need directly without having to tab through all these different places to copy and paste.

AC
Adam Conway
Senior AI Engineer
Enatacase-study

Horizon actually had the best onboarding experience on my team. Even people who have not done tech before were able to onboard onto the tool, which is a very strong sign of ease of use.

SS
Smit Shah
Founder

Build your context layer.

Free for personal projects. Enterprise governance for teams deploying to thousands.

Start for freeTalk to us