Agent Checkout API
Your agents can browse and purchase, but checkout must be controlled. Signets gives you an API-native checkout guardrail for autonomous flows.
An agent checkout API is the orchestration layer between agent intent and merchant authorization. It validates who can pay, where they can pay, and how much can be spent in each checkout flow.
Get Sandbox AccessWhy Legacy Fails
Card-on-file patterns do not express intent context from autonomous agents.
Risk controls are often post-transaction instead of pre-authorization.
Checkout retries from agents can create duplicate charges without velocity controls.
Approval policies are hard to trigger dynamically by amount, merchant, or category.
How Signets Works
Agent asks to checkout with merchant and amount context.
Intent is evaluated against policy with policy-based approval.
A card is issued or unlocked for a scoped checkout window.
Merchant authorization proceeds only if constraints are satisfied.
Results are streamed via webhooks to your platform backend.
Code Example
const intent = await signets.intents.create({
agentId: "support-agent-17",
purpose: "Checkout software license",
expectedMerchant: "notion.so",
expectedAmount: 4900
});
const card = await signets.cards.create({
agentId: "support-agent-17",
type: "single_use",
limits: { perAuth: 4900, perDay: 10000, perMonth: 100000 }
});Comparison
| Capability | Generic Checkout Flow | Signets Checkout API |
|---|---|---|
| Intent declaration | Not required | Required and structured |
| Merchant lock | Limited | Native control |
| Approval escalation | Custom build | Policy-driven |
| Duplicate spend controls | Partial | Velocity + window controls |
Use Cases
FAQ
Does this replace my checkout automation framework?
No. Signets complements your automation framework by adding payment and policy control at the transaction layer.
Can I allow small transactions and escalate larger ones?
Yes. Approval thresholds can be policy-based by amount, merchant, and other attributes.