Developers
Developer API, Webhooks, CLI and MCP for Digital Stores
Everything in the dashboard has an API behind it. Create checkout sessions from your own app, react to signed webhooks, build a theme locally with the CLI, or let an AI assistant run the store through MCP.
What’s included
Build on top of your store.
- API keys
- Scoped keys for checkout, customer balances, withdrawals and bots, with optional expiry.
- Checkout API
- Create hosted checkout sessions from your own site or app.
- Checkout Elements
- Put Paysum’s payment form inside your own page and keep your design.
- Withdrawal and Customer Balance APIs
- Automate crypto withdrawals and store credit. Premium.
- Webhooks
- Signed order events to your server, or formatted messages when the URL is a Discord webhook. Rotate the signing secret with a 24-hour overlap.
- CLI and MCP
- Develop themes locally with hot reload, sync them from CI, and connect AI assistants to your store through MCP.
Questions
Something else? Search the help center.
Can I run a headless store?
Yes. List products with the API, create checkout sessions from your backend, and take payment in Checkout Elements on your own page.
How do I check a webhook is really from Paysum?
Every webhook is signed with your signing secret. Verify the signature header before trusting the body.
Set it up
Step-by-step guides in the docs.
More of Paysum
- Storefront A hosted store you can make your own.
- Products and delivery Orders are fulfilled as soon as payment confirms.
- Payments Card, PayPal and processor payments settle with you; crypto lands in store wallets.
- Marketing Bring buyers back and reward the ones who send you more.
- Discord Sell roles and server access with the rules you choose.
- Fraud Shield A rules engine for risky orders. Premium.
- Automations The store acts for you when something happens.
- Reselling Sell other stores’ stock, or let them sell yours.
- Operations Run the store with a team.
Open your store today.
Start selling for free Free forever. Premium is $15/month with every feature.