v0 - Opencals Developer Docs

v0 supports Agent Skills, so it uses the same two Opencals skills as Claude Code and Cursor. It generates a standard Next.js app on @opencals/storefront-sdk, which you can keep developing anywhere.

Create a storefront key

In the Opencals dashboard open Settings → API Keys and create a key (sfk_…). Leave allowed origins empty: the SDK runs in server code, which sends no Origin header.

Attach the skills

In the v0 prompt bar open the skills menu (type / in the composer) and add the Opencals skills from skills.sh:

letsopencals/skills

Attach both opencals-build-booking-site and opencals-storefront-api, and save them to your personal or team scope.

Add the environment variable

v0 asks for missing environment variables above the composer, or add them to the project yourself:

Variable	Value
`OPENCALS_API_KEY`	Your `sfk_…` key (required)
`OPENCALS_API_URL`	`https://api.opencals.com` (optional, default)
`AUTH_SECRET`	Random string, only if the site adds customer sign-in

Describe the business

Build a booking website for Ridge Padel, a six-court padel club in Valencia.
Use the Opencals skills. Players pick a date and see every court against
time in one grid, then choose 60 or 90 minutes. Coached group sessions are
bookable separately, with spots left shown. Dark, sporty, one electric-lime
accent. Pages: home, book a court, coaching, checkout, confirmation.

Other tools, same skills

npx skills add letsopencals/skills

/plugin marketplace add letsopencals/skills
/plugin install opencals@opencals

Check before publishing

Slot times from the API are UTC. If the picker shows raw UTC, tell v0: “slot times are UTC, show them in the store’s timezone”.
Book end to end with Stripe’s test card 4242 4242 4242 4242 and confirm the booking appears in the dashboard.
Publish to Vercel, then switch the store to production to take real payments.

Agent skills

AI app builders

v0

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