Coming to HubSpot · Design partners wanted
Trustplane for HubSpot.
HubSpot automation can touch deals, subscriptions and customer records. Trustplane makes every one of those requests prove what it is — and refuses the ones that shouldn't happen. We're building the HubSpot app with a small group of design partners now.
The demo scenario
Sales requests. Operations activates.
In this demo scenario, a sales workflow tries to activate a plan upgrade itself. The request is correctly signed, but it isn't allowed — the boundary refuses it. Only the operations service can activate. Read the full walkthrough →
01
Workflows prove what they are
Each request from a HubSpot workflow carries a short-lived, single-use proof tied to a declared trust anchor — not a long-lived API key pasted into a webhook.
02
Separation of duties, enforced
Sales can request an upgrade. Only the operations service can activate it. A correctly signed request from the wrong workload is refused before your systems are reached.
03
An audit record for every decision
Allowed and refused requests are both recorded with identity, target, policy decision and reason — evidence you can show finance or an auditor.
Why it matters
Agents now act on both sides of HubSpot.
External agents use HubSpot's APIs and MCP to do CRM work. HubSpot agents reach out through partner tools to the systems that price, fulfill and service the customer. Those business APIs need to know exactly which caller is asking, and what it may do.
Known caller
Separate identities
Each executor gets its own workload identity and route grants. A HubSpot tool and a partner agent are never the same caller.
Exact request
Signed and checked
The method, destination and request body are verified before the request is forwarded. An altered request never reaches the application.
Stop one caller
Targeted revocation
Revoke one caller's access and confirm the new policy is active at the API, without touching anyone else.
Decision evidence
Every decision recorded
The access decision and the upstream result are recorded for investigation and audit.
Proposed workflow
A customer upgrade, end to end.
A worked example of the kind of workflow we want to protect with a design partner.
01
Recognize the opportunity
A HubSpot agent combines CRM context with an approved usage summary.
02
Prepare an offer
A partner tool asks the pricing API for a permitted plan and seat count.
03
Confirm the transaction
The application checks approval and payment in the systems that own them.
04
Fulfill the upgrade
An authorized worker calls provisioning and records the result back in HubSpot.
Proposed pilot demo
Control one caller independently.
Two callers share one protected business API. Each is verified on its own, and each can be stopped on its own.
01 · Both work
Two execution paths
A HubSpot tool executor and a partner agent both call one protected business API, and both are allowed.
02 · Alter it
The API refuses it
The body is changed after signing. The altered request is denied before it reaches the application.
03 · Revoke one
The other keeps working
One caller's access is revoked. Its calls stop; the other caller remains allowed.
How we'd work together
One partner. One API. Two agent callers.
A pilot with a business decision at the end: one named customer, a fair comparison with native authentication, and an agreed go / no-go.
Pilot
One design partner
Protect a business API through a customer-owned or partner-owned integration, measuring workflow completion, setup effort and operating cost.
Repeat
A reusable pattern
If the pilot earns it, package the connection and an operating guide so the next API or caller is quick to add.
Explore
Native integration
Discuss deeper HubSpot signing or verification hooks if adoption justifies them.
Design partner waitlist
Shape the HubSpot app with us.
Design partners get early access and a custom walkthrough against their own HubSpot workflows. Tell us who you are and we'll be in touch.