# x402 Integration

Use `POST /v1/evidence/x402` with an agent credential carrying `events:write`.

The V1 x402 adapter re-verifies submitted seller, buyer and anchor evidence before deriving canonical economic facts. The canonical ledger remains protocol-neutral.

Required body groups:
- `sellerRows`
- `buyerRows`
- `anchorRows`

Each row follows the versioned evidence-row contract in `/openapi.yaml`.

Exact retries require the same `Idempotency-Key`. Different evidence under the same key is rejected.