The Integration Gateway

Ship the feature. Skip the glue.

Describe what you need. Fused turns it into a Unified App: one integration capability your backends and agents can share. Review the code, deploy to Engine, and use it through API, SDK, or MCP.

Get started See describe in action

Your goal → Unified AppTerminal

$ fused-cli describe \
  "Find a customer in HubSpot and
   return their recent Stripe invoices" \
  --name customer-brief

Finds the service operations your goal needs

Drafts editable TypeScript and app config

Shows the source for your review

Start with a connected Engine and credentials for your services.

customer-briefApp input

{
  "email": "sam@example.com"
}

One responseApp output

{
  "customer": "Sam",
  "invoices": [
    { "total": 4900,
      "currency": "usd" }
  ]
}

Call via APIAdd to an SDKAdd to MCP

One contract for every caller. Change services behind it.

One reusable capabilityBackend + agent

Credentials stay in EngineShared access controls

Swap the serviceKeep your app contract

Fused, across your company

Enable every team.
And everything they build.

A shared integration foundation for your teams. Approved capabilities for your agents. Service access for your backends. All governed through Fused.

Shared workspaceIllustrative example

Acme workspaceShared integration capabilities

TeamCapability

Customer Opscustomer-brief

Financeinvoice-status

Engineeringincident-context

Team access managed in Fused

Make integration knowledge a company asset.

Give every team a place to discover services, build capabilities, and connect to the services they need.

01
Define once. Reuse across teams.
Import service contracts and share reviewed Unified Apps, SDKs, and MCP servers.
02
Delegate access with boundaries.
Choose which services each team can use, with credential buckets and scoped permissions.
03
Keep ownership visible.
Version what you ship and trace how it is used.

Explore team enablement

One foundation underneath. Scoped access Credentials in Engine Execution visibility

Works with the services your products already rely on—and the internal ones nobody got around to documenting.

Stripe

Slack

GitHub

Linear

HubSpot

Notion

Questions, answered

Your capability. Your control.

Your team owns the integration logic and the contract callers use. Engine handles credentials, permissions, and execution visibility.

What is a Unified App?

A Unified App packages a deterministic integration flow as one reusable capability. You define the logic in TypeScript, and backends use it through an SDK or API while agents use it through MCP. Keep its input and output contract stable, and you can switch the underlying services without rewriting the applications or agents that use it.

Does Fused run in our infrastructure?

It can, and most teams want it to. Deploy Engine in your VPC, Kubernetes cluster, or cloud of choice with a license key, or let Fused provision an isolated one for you. Either way, request payloads, encrypted credentials, connected-user tokens, and webhook delivery state stay with the Engine.

How do products and agents use Fused?

Describe a capability with fused-cli describe, review the generated TypeScript, and deploy it as a Unified App. Backends call it through an API or SDK; agents use it through MCP. You can also expose individual service operations directly through SDKs and MCP servers.

How does Fused handle webhooks?

Register a provider webhook or use an available managed event connection, then select which events each app receives. Events can trigger a Unified App, reach a backend through its SDK receiver, or update an MCP event resource for an agent. Engine handles verification and routing; each destination has its own delivery model.

Can we control which services each team can use?

Yes—that is rather the point. Platform teams decide which services and operations each team, application, and agent can reach. A team can use a credential bucket without being able to read what is inside it.

Scale-Up & Enterprise

Ready to expand beyond Dev?

Every self-service account starts on Dev. Tell us about your production needs and we’ll help shape the right limits, controls, and rollout.

Higher integration and runtime limits

Company SSO and production controls

Direct planning with the Fused team

Talk to us

Tell us what you need.

Share a little context and we’ll follow up about Scale-Up or Enterprise.