Monthly limit

$2.500

Payment done

$20 · OpenAI

Give your AI a card.

Your agent can nowpay for OpenAI

No spam · We only email you when we open.

Works with the agents you already use

ClaudeClaudeChatGPTChatGPTCursorCursorOpenClawOpenClawHermesHermesand more…
The problem

Your agent can already do almost everything.
Except pay.

You ask it to book, buy credits, renew a subscription… and it stops at the card. Or worse: you paste your card number and pray. Cardia fixes that without you losing control.

How it works

Ready in three steps.

No paperwork, no bank, no physical cards.

01

Connect your agent

Paste one URL. Cardia speaks MCP: it plugs into Claude, ChatGPT, Cursor or whatever agent you already use.

02

Create a card with limits

Give it a name, a monthly limit and where it can spend. Virtual card ready in seconds.

03

Your agent pays, you stay in control

It only pays what fits your rules. For anything bigger, it asks you with Face ID before spending a cent.

Your phone rules

All in your pocket.

Approve, freeze, and track every charge from your phone. One tap, no weird logins.

  • Approve what matters with Face ID.
  • Freeze or cancel any card instantly.
  • See every movement live.
La app de Cardia en el teléfono
Why Cardia?

Your agent holds the wallet,
you hold the keys.

Limits and approvals live in the app — not in the model. Even if your AI gets tricked, your money is safe.

Monthly limit$50
$21 used$50

Limits you control

You decide at which merchants it can spend, up to what amount and for how long. Always enforced.

Pay my OpenAI Plus 💳
Done ✅ $20 to OpenAI

Your agent pays on its own

Just ask: subscriptions, APIs, purchases. You never touch a card.

Your agent wants to pay

$120 · Amazon

Approve

You approve what matters

Anything over your limit reaches your phone. Approve with Face ID in one tap.

ClaudeChatGPTCursorOpenClawHermes

Works with your agent

Claude, ChatGPT, Cursor, OpenClaw. One connector and you're done.

ControlledJumbo
Free$500

Controlled or Free

The Controlled card only pays where you granted permission; the Free one, at any merchant within the limit. You choose per card.

pass-through · no custody

We never touch your money

Money passes straight through to your card. We're not a bank and we don't hold your balance.

openai.com−$20
Vercel−$15

Every spend, live

See what your agent paid instantly and stop anything whenever you want.

$0overspent — the limit can't be exceeded
3 tapsto freeze or cancel any card
1 connectorfor Claude, ChatGPT, Cursor and whatever you use
🔒 Security

Safe even from your own AI.

We built Cardia assuming your agent will be tricked. That's why your money never depends on the model "behaving itself".

The limit doesn't live in the model

Every payment is authorized by Cardia on the server against your rules. A malicious prompt can't change them.

No custody of your money

We're pass-through: money flows straight to the payment. We don't hold it or operate your balance.

You have the final say

Sensitive payments are approved with Face ID from your phone. Freeze or cancel any card instantly.

“Your agent only touches the cards you give it. Nothing else.

The difference

The limit lives in the card, not in the prompt.

Each card only authorizes where you granted permission: one merchant, a maximum amount and an expiry. If your agent slips up or gets tricked, the purchase is rejected. Deny-by-default.

cardia

$ cardia grant --card agent-1 --merchant Jumbo --max 50000

✓ Permission created · Jumbo · max $50,000 · expires in 7 days

$ cardia buy --merchant Jumbo --amount 12000 --max 50000

✓ APPROVED · $12,000 at Jumbo

$ cardia buy --merchant Carrefour --amount 12000

✗ REJECTED · no permission for Carrefour

merchant: Jumbomax: $50,000expiry: 7 daysonly authorizes here
Try the authorizer yourself
Use cases

For everything your agent needs to pay.

🔌

APIs & credits

OpenAI · Anthropic · Vercel · Replicate

▶️

Subscriptions

ChatGPT Plus · Netflix · Spotify · Disney+

🛵

Shopping & delivery

Mercado Libre · Rappi · PedidosYa

✈️

Services & bookings

Flights · domains · courses · whatever you ask

</> For developers

One connector. Any agent.

Cardia speaks MCP, the standard for connecting agents. Plug it into Claude, ChatGPT, Cursor or OpenClaw in one line — and your agent pays within the rules you set in code or from the app.

  • The limit is enforced on the server, not in the model — safe from prompt-injection.
  • Virtual cards per agent, capped by merchant, by amount and by expiry.
  • Every payment leaves an audit trail.
terminal

# Connect Cardia to your agent

$ claude mcp add cardia -- npx cardia mcp

✓ Connected · 12 tools available

# Then, in plain language:

“Create a $25 card for openai.com and pay the subscription.”

✓ Payment approved · within the limit

Or from the terminal, with the CLI

The agent buys with control: grant sets the scope, buy executes within it, permissions audits.

  • cardia cardslists your agents' cards
  • cardia grantsets the scope: merchant, max amount and expiry
  • cardia buythe agent pays within its permissions
  • cardia permissionsaudits what you authorized and for whom

Tools: create_card · grant_permission · authorize_payment · check_balance · freeze_card · get_transactions and more.

What's next

Today your agent pays. Soon, your agent gets paid.

We're building so your agent can also charge your clients — without you becoming a payments platform.

FAQ

What you're probably wondering.

No. Cardia issues virtual cards for your agent in seconds, with the limit and rules you choose. You never touch your physical card or your bank.

Yes, because the decision to spend doesn't live in the model: it lives in Cardia. Limits and approvals are enforced on our side. Even if your agent is tricked by a malicious prompt, it can't cross your rules.

The ones you already use: Claude, ChatGPT, Cursor, OpenClaw and anything that speaks MCP. It's a single connector — add it once and you're done.

No. Cardia is pass-through: money flows straight to the payment. We're not a bank or a wallet holding a balance in custody. Your money stays yours.

You fund it however you want: in pesos (via CVU) or with USDT and other crypto (via Manteca). Cardia creates virtual cards that spend from there, always within the limits you set. You see every movement on your phone instantly.

Joining the waitlist is free. We're still defining the model for launch, but the idea is simple: no hidden costs. Whatever it costs will be clear from day one.

Each card has its own limit, so the maximum possible damage is that limit — never your whole account. And you can freeze or cancel everything in one tap from any device.

The ones out there are built for developers and for the US. Cardia is for you: in your language, with your services (Mercado Libre, Rappi, Netflix), from your phone, without writing a single line of code.

Yes. Create your account at cardia.digital/en/register, grab your token, and within minutes your agent operates test cards via CLI or MCP. It's a sandbox: no credit card, no real money.

You can already create your test account (beta, sandbox) at cardia.digital/en/register. The real-money launch is announced to the waitlist first — drop your email and be among the first, starting in Latin America.

Your AI already thinks, talks and works for you.
Now it can pay, too.

You can already create your test account in the sandbox and connect your agent today. And drop your email: the real-money launch is announced to the list first.

No spam · We only email you when we open.

Cardia - Give your AI agent a card — with limits and scope | Product Hunt