Prompt
Describe the app and the HubSpot surfaces it needs.
HS-X×Claude Code, Codex, Cursor, or opencode
Build a HubSpot Marketplace app in 15 minutes.
Start with a prompt. End with a working workflow action, data sync, and CRM card.
One typed project. One deploy. Your runtime.
works withvia mcp
agent › email-guard
statusbuilding
surfaces3
runtimeyour Worker
prompt.mdYOU
Build a HubSpot app that checks email deliverability, imports our suppression list, and shows the result on every contact.
hs-x devAGENT
✓actionvalidate-email
✓syncsuppression-list
✓cardemail-health
✓deploy14m 38s
✓live›HubSpot sandbox+Cloudflare Worker3 capabilities
15-MINUTE BUILD
Your agent knows code. HS-X teaches it HubSpot.
The CLI and MCP server give your agent the project structure, validation, local invocation, and deploy path it needs to build against the real platform instead of guessing at integration glue.
Scaffold
The agent creates the Worker, schema, app card, and local project.
Build
One typed model connects the workflow action, sync, and CRM card.
Exercise
HS-X validates and invokes each capability while the agent iterates.
Deploy
The app lands in HubSpot and your own Cloudflare account.
PROMPT → APP
Build the next part with a Markdown prompt.
Ask for a workflow action, a HubSpot UI card, or billing. Your agent uses HS-X to turn the prompt into the schema, platform registration, runtime code, and local test.
prompt.md · agent build
Build looplive · 4.2 s
prompt.mdMARKDOWN
# Add a workflow action
Add a `validate-email` workflow action to Email Guard. It should accept an email, return a branchable deliverability status and score, and write the result back to the enrolled contact.
- - [ ] Use the existing email schema
- - [ ] Add deliverable, risky, and blocked branches
- - [ ] Exercise it locally before deploy
✓ The agent adds the capability, schema, HubSpot registration, and local test.
email-guard · generated previewWorkflow action
HubSpot workflowsEMAIL GUARD
ENROLLMENTContact created
↓CUSTOM ACTIONValidate emailrunning · 184 ms
↓deliverableriskyblocked
✓prompt.md›workflow action builtauto-cycles · hover to pause
MARKETPLACE PATH
Fifteen minutes gets the product working. Listing comes next.
Build and deploy first. Then prepare OAuth, scopes, listing copy, screenshots, security answers, billing, and the HubSpot review — without pretending Marketplace approval takes fifteen minutes.
marketplace readiness
build≈ 15 min
reviewHubSpot
guideincluded
BuildWorking app
TestSandbox portal
PrepareListing + policies
SubmitHubSpot review
Ready when your agent is
Empty directory to live HubSpot app.
Follow the Email Guard build and ship the workflow action, sync, and CRM card in about fifteen minutes.