FVAMPay

Developers

API keys per environment, a webhook endpoint with signed deliveries, and a sandbox on a test network with free test funds.

API keys

  • Live live

    fv_live_7Kq2…

    Last used 26 Oct, 15:54

  • Sandbox sandbox

    fv_test_a91X…

    Last used 23 Oct, 15:59

A key is shown once when created or rotated. Keys authenticate the server API: create requests, plans, renewal charges, refunds, list payments.

Webhook endpoint

Signed with your per-merchant secret · retried with backoff

Events

  • payment.requested
  • payment.paid
  • payment.declined
  • payment.expired
  • subscription.created
  • subscription.renewed
  • subscription.renewal_failed
  • subscription.cancelled
  • refund.sent
  • dispute.opened

Recent deliveries

WhenEventPayloadResult
26 Oct, 15:54payment.paid
{"paymentId":"pay_48213","amount":999,"currency":"GBP","txHash":"0x8a3f482130c21e"}
200 OK
26 Oct, 15:39payment.paid
{"paymentId":"pay_48212","amount":8900,"currency":"GBP"}
200 OK
26 Oct, 15:23payment.declined
{"paymentId":"pay_48211","reason":"declined_by_user"}
200 OK
26 Oct, 14:50subscription.renewed
{"subscriptionId":"sub_3","paymentId":"pay_48210"}
200 OK2 attempts
26 Oct, 14:12refund.sent
{"paymentId":"pay_48190","refundId":"ref_48190","amount":999}
200 OK
26 Oct, 06:59subscription.renewal_failed
{"subscriptionId":"sub_4","reason":"insufficient_balance","retryAt":"2026-10-27T15:59:05.023Z"}
500 failed3 attempts