01CARD
ACP
Agentic Commerce Protocol
RESTful checkout protocol with 4 endpoints. Agent creates checkout, customer approves via Stripe-hosted UI, agent completes with SharedPaymentToken.
MAINTAINER
OpenAI + Stripe
SETTLEMENT
T+1 fiat (Stripe)
312 agent payments in the last hour
AI agents are already buying on behalf of millions of people. Shopfi is the single API that lets your store accept them — across every protocol, card and chain, settled in real time.
1% flat, no monthly fee 9 protocols, one integration
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ACPAP2x402Visa TAPMastercard Agent PayMPPVisa CLIL402UCPACPAP2x402Visa TAPMastercard Agent PayMPPVisa CLIL402UCP
How it works
From a spoken request to settled revenue — in seconds.
01
A customer asks their AI
Someone tells ChatGPT, Gemini, Claude or Copilot to "find and buy" something.
02
Your store is surfaced
Shopfi makes your catalog visible and buyable across every major agent and rail.
03
The agent pays instantly
No checkout form, no cart abandonment. The agent settles directly through one API.
04
It lands in your dashboard
Every order arrives with full agent attribution, protocol detail and instant payout.
Every rail, one API
Nine payment protocols. One integration to rule them.
scroll →02CARD
AP2
Agent Payments Protocol
Mandate-based protocol using Verifiable Digital Credentials. Cart Mandate captures user intent, Payment Mandate signals agent involvement to payment network.
MAINTAINER
Google (60+ partners)
SETTLEMENT
Varies by payment method
03CRYPTO
x402
x402 Stablecoin Protocol
HTTP-native protocol using 402 Payment Required status. Server responds 402 with payment requirements, client signs USDC payment and retries with X-PAYMENT header.
MAINTAINER
Coinbase + Cloudflare
SETTLEMENT
~200ms on Base
04CRYPTO
MPP
Machine Payments Protocol
Open standard for autonomous machine-to-machine payments. Agents pay for APIs, services, and resources programmatically. Supports stablecoins and fiat via Stripe PaymentIntents.
MAINTAINER
Stripe + Tempo
SETTLEMENT
T+1 fiat / ~instant stablecoin
05CARD
VISA TAP
Visa Trusted Agent Protocol
Cryptographically signed HTTP messages. Agent signs requests with private key, merchant verifies via public key from Visa Key Store. Timestamps + nonces prevent replay.
MAINTAINER
Visa + Cloudflare
SETTLEMENT
Standard Visa rails
06CRYPTO
VISA CLI
Visa CLI
Command-line commerce tool for AI agents. Agents pay for APIs and services via CLI using tokenized Visa card credentials. No pre-funded accounts needed.
MAINTAINER
Visa Crypto Labs
SETTLEMENT
Standard Visa rails
07CARD
MC AGENT_PAY
Mastercard Agent Pay
Builds on Mastercard tokenization. Agentic Tokens carry purchase intent data (cart contents, tx limits, validity windows). Agent Pay Acceptance Framework for merchant recognition.
MAINTAINER
Mastercard
SETTLEMENT
Standard Mastercard rails
08CRYPTO
L402
L402 Lightning Protocol
Bitcoin Lightning pay-per-request (bLIP-0026). Server returns 402 with a macaroon + Lightning invoice; client pays the invoice, presents the preimage via Authorization: L402 <macaroon>:<preimage> to redeem.
MAINTAINER
Lightning Labs
SETTLEMENT
~1s Lightning
Built for production
Everything you need to run agentic commerce.
01 / 06
One unified API
A single integration speaks every agent protocol — ACP, AP2, x402, Visa, Mastercard, MPP, L402. Ship once, accept everything.
Live sales feed
streamingPlatform volume
$1284k
Verified AI agents
12
Protocols unified
9
Agent Wallet
Total control over autonomous spend.
Set per-agent budgets, allowlists, category rules and approval thresholds. Every decision is logged to an append-only audit trail. Agents move fast — you stay in command.
Per-agent budget caps & velocity limits
Allow / block specific agents and categories
Human-in-the-loop approvals over a threshold
Policy engineactive
Monthly budget$8,000 / $12,000
ChatGPT (ACP)allow
Unknown agentsrequire approval
Open your store to AI shoppers.
Free to install. You only pay 1% per sale — every protocol, no monthly fee, ever.