---
title: "A2A Checkout"
method: POST
path: "/api/v1/a2a/checkout"
tags: ["A2A Commerce"]
---

# A2A Checkout

`POST /api/v1/a2a/checkout`

## Request

- Base URL: `https://api.estatetrace.ai` (the document declares no server; this is the origin it was published from)
- URL: `https://api.estatetrace.ai/api/v1/a2a/checkout`
- Auth: none declared

Machine-native checkout endpoint for autonomous AI agents (Phase 1 A2A Commerce).
Returns an HTTP 402 payment specification payload with Base L2 USDC payment instructions.
Adapts automatically during PRE_LAUNCH_MODE / SIMULATED_PAYMENTS.
Logs telemetry on inbound agent activity.

## Request body

- A2ACheckoutRequest
  - `lead_ids` string[], required

## Response `200`

Successful Response

- unknown

## Other responses

- `422`: Validation Error

---

[API](https://skmtc.dev/estatetrace/apis/estatetrace-api.md) · [All operations](https://skmtc.dev/estatetrace/apis/estatetrace-api/llms.txt) · [OpenAPI document](https://skmtc.dev/estatetrace/apis/estatetrace-api/revisions/93f22cfbedf5?raw)