Your agent can nowget two concert tickets.
OCA (Open Commerce Agent) gives any agent the power to buy, book and order online, in ChatGPT, Claude, Grok Bot, iMessage, WhatsApp or your own app. It finds what fits, works out the details with you, and checks out through whatever the store supports. It never pays without your OK.
ChatGPTwith OCA
I’m making paella for 6 on Friday. Get everything delivered before 5, under $120.
Ask anything
Behind the scenes
Found a store that delivers FridayCrossmint Agent Checkouts · or your own agent
Built the cart for 6: $86.40Crossmint Agent Checkouts
Asked the store’s questions: rice swap, delivery windowCrossmint Agent Checkouts
Card limit checked: $86.40 of $120Crossmint Agent Cards
You approved on a secure stepCrossmint Agent Cards
Ordered: arriving Fri 3–5 PMCrossmint Agent Checkouts
Behind the scenesWaiting for a request
Under every step,
a Crossmint API.
OCA is a showcase of what you can build with Crossmint today. Use it, or build your own on the same APIs.
Agent CheckoutsDocs →✓ built a cart for paella, serves 6✓ out of bomba rice: asked, swapped for arborio✓ delivery window: Fri 3–5 PM· waiting for your OKGive it a specific item or a loose idea. Groceries, stores, tables and tickets: it builds the cart, answers the store’s questions with you, and checks out through UCP or the store’s own checkout.Agent CardsDocs →Spending limit$86.40 of $120Cards in a PCI vault, with limits Visa and Mastercard enforce. Users keep their points.
Wherever your users areAn MCP server for ChatGPT, Claude and Grok Bot, components for your own app, or a secure approval link for iMessage, WhatsApp and any bot.
Also on CrossmintExplore →Wallets, on- and off-ramps, and agent-to-agent payments are live on Crossmint too. OCA doesn’t use them yet. Your version could.Make it yours.
OCA is open source. Fork it, give it your own name, and give your app, your bot, your messaging channel or your ChatGPT plugin the power to buy, on Crossmint.
In the repoA web app with chat and saved cardsAn app for ChatGPT, Claude and Grok BotAgent Checkouts and Agent Cards, wired inSecure approval pages for any other channel