Initialize an approval from a link

Create a pending approval up front and direct the user to a browser link to approve it.

Endpoint:

bash

POST /api/payment/approvals/init-from-link

Body (Base USDC defaults unless overridden):

json

{
  "agentId": "<external-agent-id>",
  "resourceUrl": "https://x402whois.com/api/v1/whois?domain=fluxapay.xyz",
  "amount": "10000",
  "payTo": "0xfA0eE7B2F13D80680F31771abc93D06a2C749150",
  "network": "base",
  "currency": "USDC",
  "assetAddress": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
  "tokenName": "USD Coin",
  "tokenVersion": "2",
  "description": "WHOIS lookup for fluxapay.xyz",
  "ttl": 300
}

Response (pending approval):

json

{
  "approvalId": "papr_abc12345",
  "approvalUrl": "https://agentwallet.fluxapay.xyz/authorize-payment/papr_abc12345",
  "expiresAt": 1730400000,
  "approval": { /* echoed approval metadata */ }
}

Once approved, call x402V1Payment with the same parameters plus "approvalId": "papr_abc12345".

Idempotency: include an aid to re‑fetch an existing pending approval.

Initialize an approval from a link ​

Initialize an approval from a link