Do I need any of these?

No. Corey does its job without them. Each one adds depth in a specific area - taking payments, reaching more apps, or designing interfaces - and only matters if that is work you want Corey doing. Add them when the need comes up, not before.

Why can these not just be built in?

Because each depends on something that has to be yours. A Stripe account handles your money and must be in your name for legal and tax reasons. A Composio account holds your logins to other services. The design kit is licensed per user. None of the three is ours to hand over, so you sign up and Corey works with what you connect.

Stripe is free to open and charges a fee per transaction. Composio has a free tier. The design kit is a separate licence from its publisher. All three are billed by their own provider, not by us, and you can cancel any of them without affecting the rest of your setup.

Is my payment data safe if I connect Stripe?

Yes. Connecting Stripe gives Corey knowledge of how to build payments properly, and the normal approval rules still apply - anything that moves real money in your live account waits for your explicit approval. Card details never touch your own systems, because Stripe handles them.

What if a command does not work?

Ask Corey. Paste what you typed and what came back, and it will work out what went wrong. The most common cause is a plugin that installed but needs /reload-plugins before its skills appear.

Corey Optional Add-Ons: Stripe, Composio and the UI Design Kit

Three add-ons extend what Corey can do, and each needs something in your name: a Stripe account for payments work, a Composio account to reach a thousand-plus apps, and a licensed UI design kit for interface work. Each is one sign-up plus one command to paste. Corey works fully without them.

Most of what Corey can do arrives with it. Three things cannot, because each depends on an account or a licence that has to be in your name: Stripe for payments work, Composio for reaching other apps, and a UI design kit for interface work.

Corey does its job without all three. Add one when the work calls for it.

Each is the same shape: sign up once with the provider, paste one line, done. The sign-up is the part that matters, so it is written out first each time.

Stripe: payments, subscriptions and billing

What you sign up for. A Stripe account. Stripe is the payment processor most online businesses use to take card payments. Opening an account is free and takes a few minutes; Stripe charges a percentage of each payment you take. The account is in your business’s name because it holds your money and appears on your customers’ bank statements, so it cannot be anyone else’s.

What it gives Corey. A deep working knowledge of how to build payments properly: taking one-off payments, running subscriptions, handling the webhooks that tell your system a payment succeeded, marketplaces that pay other people, and how to keep the keys safe. Without it Corey can still discuss payments; with it, it builds them to Stripe’s own current practice rather than from memory.

Paste this into Claude Code:

/plugin install stripe@claude-plugins-official

That marketplace is Anthropic’s own and is already registered, so there is nothing to add first.

Your money stays gated

Connecting Stripe does not loosen the approval rules. Anything that moves real money in your live account waits for your explicit yes, every time. Corey builds and tests against Stripe’s test mode, which uses fake cards and moves nothing.

Composio: reach a thousand-plus other apps

What you sign up for. A Composio account. Composio is a connector service: you log into your apps once through it, and anything you connect becomes reachable. There is a free tier. The account is yours because it holds your logins to those apps, and handing those to someone else is exactly what you should never do.

What it gives Corey. A single route to over a thousand applications, including many that offer no direct connection of their own. If a tool your business depends on is not already on Corey’s list, this is usually how it gets there.

Install the command-line tool, then sign in:

curl -fsSL https://composio.dev/install | sh
composio login
composio whoami

The third line is the check: if it prints your account, it worked. Then connect an app with composio link <app>, for example composio link gmail, which opens a browser window for you to approve.

UI design kit: interfaces that look considered

What you sign up for. A licence for the ui-ux-pro-max design kit from its publisher. This one is a paid third-party product rather than a service account, and it is licensed to you.

What it gives Corey. A large library of interface styles, colour palettes, font pairings and chart types, plus review passes for accessibility and layout. It raises the floor on anything with a screen: dashboards, admin panels, landing pages, apps.

Paste both lines into Claude Code, in order:

/plugin marketplace add nextlevelbuilder/ui-ux-pro-max-skill
/plugin install ui-ux-pro-max@ui-ux-pro-max-skill

The first line tells Claude Code where to look, because this one does not live in Anthropic’s marketplace. The second installs it.

Checking it worked

After any plugin install, run:

/reload-plugins

Then ask Corey directly: “do you have the Stripe skills?” or “can you reach Composio?” It will tell you what it can actually see, which is a better check than assuming the install took. If something is missing, paste the command you ran and what came back, and Corey will work out why.

What we get out of it

Nothing on this page is a referral link, and we are not paid for any of these recommendations. They are here because they are what Corey actually uses.

Optional add-ons