AI payment for your shop

Sell to AI agents. One link on your site, and a buyer's agent places and pays the order by itself. USDC settles to your wallet. 0% fee during the pilot.

Connect AI paymentView the demo shop

Merchants connected so far: 2.

How it works

The buyer's agent finds the storefront, sees only your tools, gets a quote and pays it in USDC over x402 (Base) or MPP (Tempo), straight to your wallet. APIbase does not hold your money. See why Base and Tempo.

Subscriptions

A subscription is renewed by the buyer's agent with an explicit payment; funds are not debited automatically unless the payer pre-signs the next periods on Base (see Base pull subscriptions). Each period is an ordinary order: the agent asks for the renewal quote inside a 72-hour window around the end of the paid period and pays it on Base or Tempo. If the period ends unpaid, the subscription is past due, you get subscription.past_due after 24 hours and it is canceled after 72 hours. Grant access from the subscription.* webhooks or by reading the subscription. Details: /integrator/docs#subscriptions.

What your buyer's agent sees

Four ways to add it

All four are markup or a link; nothing to install and no script from us. Replace <slug> and <sku>. Click a block to select it.

A. Button at the product

<a href="https://apibase.pro/m/<slug>/p/<sku>" rel="alternate payment" class="apibase-ai-buy">Buy with your AI agent</a>

B. Button at checkout (cart link)

<a href="https://apibase.pro/m/<slug>/cart?items=<sku>:1,<sku>:2" rel="alternate payment">Buy with your AI agent</a>

C. "AI purchase" block on the home page

<p>AI purchase: AI agents can buy here. <a href="https://apibase.pro/m/<slug>">Open our AI storefront</a></p>

D. Machine markup only

<link rel="alternate" type="application/json" href="https://apibase.pro/m/<slug>/agent.json">
<script type="application/ld+json">
{"@context":"https://schema.org","@type":"Offer","potentialAction":
 {"@type":"BuyAction","target":"https://apibase.pro/mcp/m/<slug>"}}
</script>

# llms.txt on your site
AI agents can buy here: https://apibase.pro/m/<slug>/llms.txt

Website builders: Shopify · WooCommerce · Tilda · Wix · custom site.

Connect in 10 minutes

Sandbox and the connection check

• [1/5] storefront_initialize …… [ OK ]
• [2/5] tools_list_6 …… [ OK ]
• [3/5] quote_test_sku …… [ OK ]
• [4/5] webhook_ping …… [ OK ]
• [5/5] payment_verified …… [ WAIT ]

example output · connected = steps 1–4 pass · payment_verified = your own agent paid a test order

Sandbox: https://sandbox.apibase.pro — the same image on Base Sepolia and Tempo testnet with its own database; register and run the connection check there first, then repeat on mainnet with the $0.01 test SKU.

Call shop.merchant.check or GET /api/v1/shop/merchants/me/check with your key; anyone can read the statuses at /integrator/check/<slug>.

• connected: the first four steps have no failure.
• payment_verified: a paid test order made by your own agent exists.

Fee and minimums

Fee: 0% (pilot). Minimum order: $1.00. The test item carries no fee.

While the fee is off, nothing is recorded or charged on either rail.

Why Base and Tempo

Base: USDC is native; x402 is an open Coinbase protocol for paying HTTP requests in USDC; our facilitator settles. Tempo: settlement and network fees in a stablecoin; native splits and sessions (MPP). Full text: /integrator/why-base-tempo.

Security: what you can verify

• The quote's pay.x402.payTo is your payout wallet. It is never the platform wallet; compare it with the transfer on a block explorer.
• The buyer signs an authorization for the exact quoted total to that exact address; the nonce is single-use.
• Goods are delivered only after the USDC transfer has a successful receipt.
• Webhooks are signed with HMAC-SHA256 over the raw body; URLs must be https and public, redirects are not followed.
• Your API key is shown once; APIbase stores only its hash. APIbase takes no card data.
• Every product passes rule-based moderation before buyers see it.

What stays outside our guarantees

Spending limits belong to the buyer's wallet. Human confirmation belongs to the buyer's agent client. Safekeeping of your key is yours. Refunds are the seller's duty (see the refund framework below).

Questions

Legal documents

Published on 2026-10-12; the hashes are in /legal/index.json.

• Merchant agreement
• Acceptable use policy
• Data processing addendum
• Refund framework
• Hashes (index.json)

Make your site easy for agents

Do AI agents visit your site? Check on AIpush.app. It shows how agents see your site and what to fix.

For buyers

Add a storefront URL https://apibase.pro/mcp/m/<slug> to your agent's MCP client, or find shops with apibase.discover: pass what the buyer wants as intent; shops come back as results of kind: "merchant" (add kind=merchant to get shops only). Limits live in your wallet, the quote fixes the price, and nobody asks for your keys. Details: /integrator/buyers.