diff --git a/lnbits/core/services/payments.py b/lnbits/core/services/payments.py
index 4987dd517..1394a9e6a 100644
--- a/lnbits/core/services/payments.py
+++ b/lnbits/core/services/payments.py
@@ -65,6 +65,7 @@ async def pay_invoice(
     tag: str = "",
     labels: list[str] | None = None,
     external_id: str | None = None,
+    webhook: str | None = None,
     conn: Connection | None = None,
 ) -> Payment:
     if settings.lnbits_only_allow_incoming_payments:
@@ -99,6 +100,7 @@ async def pay_invoice(
             extra=extra,
             labels=labels,
             external_id=external_id,
+            webhook=webhook,
         )
 
     async with db.reuse_conn(conn) if conn else db.connect() as new_conn:
diff --git a/lnbits/core/views/payment_api.py b/lnbits/core/views/payment_api.py
index 5239c7454..ea4ecccea 100644
--- a/lnbits/core/views/payment_api.py
+++ b/lnbits/core/views/payment_api.py
@@ -256,6 +256,8 @@ async def api_all_payments_paginated(
         `amount`, `unit`, and `memo`. To pay an arbitrary invoice from the funds
         already in the authorized account, specify `out: true` and use the `bolt11`
         field to supply the BOLT11 invoice to be paid.
+        The optional `webhook` field is honoured in both directions: LNbits POSTs
+        the payment to that URL once the payment reaches `success`.
     """,
     status_code=HTTPStatus.CREATED,
     responses={
@@ -281,6 +283,7 @@ async def api_payments_create(
             extra=invoice_data.extra,
             labels=invoice_data.labels,
             external_id=invoice_data.external_id,
+            webhook=invoice_data.webhook,
         )
         return payment
 
diff --git a/tests/api/test_api.py b/tests/api/test_api.py
index 2401c71fe..1408090a5 100644
--- a/tests/api/test_api.py
+++ b/tests/api/test_api.py
@@ -341,6 +341,38 @@ async def test_pay_invoice(
     # assert payment.payment_hash == invoice["payment_hash"]
 
 
+# check POST /api/v1/payments: the webhook is kept on an outgoing payment
+@pytest.mark.anyio
+async def test_pay_invoice_with_webhook(
+    client,
+    inkey_headers_to,
+    adminkey_headers_from,
+    mocker: MockerFixture,
+):
+    mocker.patch(
+        "lnbits.core.services.notifications.dispatch_webhook",
+        AsyncMock(return_value=None),
+    )
+
+    invoice_data = await get_random_invoice_data()
+    create_response = await client.post(
+        "/api/v1/payments", json=invoice_data, headers=inkey_headers_to
+    )
+    assert create_response.status_code < 300
+
+    webhook_url = "http://test.404.lnbits.com"
+    data = {
+        "out": True,
+        "bolt11": create_response.json()["bolt11"],
+        "webhook": webhook_url,
+    }
+    response = await client.post(
+        "/api/v1/payments", json=data, headers=adminkey_headers_from
+    )
+    assert response.status_code < 300
+    assert response.json()["webhook"] == webhook_url
+
+
 # check GET /api/v1/payments/<hash>: payment status
 @pytest.mark.anyio
 async def test_check_payment_without_key(client, invoice: Payment):
diff --git a/tests/unit/test_pay_invoice.py b/tests/unit/test_pay_invoice.py
index 5fdcfdf73..9b1461be1 100644
--- a/tests/unit/test_pay_invoice.py
+++ b/tests/unit/test_pay_invoice.py
@@ -533,6 +533,91 @@ async def test_pay_external_invoice_success(
     assert ws_notification.call_count == 1, "Websocket notification sent."
 
 
+@pytest.mark.anyio
+async def test_pay_external_invoice_with_webhook(
+    from_wallet: Wallet, mocker: MockerFixture, external_funding_source: FakeWallet
+):
+    invoice_amount = 2105
+    external_invoice = await external_funding_source.create_invoice(invoice_amount)
+    assert external_invoice.payment_request
+    assert external_invoice.checking_id
+
+    preimage = "0000000000000000000000000000000000000000000000000000000000002105"
+    mocker.patch(
+        "lnbits.wallets.FakeWallet.pay_invoice",
+        AsyncMock(
+            return_value=PaymentResponse(
+                ok=True, checking_id=external_invoice.checking_id, preimage=preimage
+            )
+        ),
+    )
+    dispatch_webhook_mock = mocker.patch(
+        "lnbits.core.services.notifications.dispatch_webhook",
+        AsyncMock(return_value=None),
+    )
+
+    webhook_url = "http://test.404.lnbits.com"
+    payment = await pay_invoice(
+        wallet_id=from_wallet.id,
+        payment_request=external_invoice.payment_request,
+        webhook=webhook_url,
+    )
+
+    _payment = await get_standalone_payment(payment.payment_hash)
+    assert _payment
+    assert _payment.status == PaymentState.SUCCESS.value
+    assert _payment.amount == -invoice_amount * 1000
+    assert _payment.webhook == webhook_url, "Webhook is stored on the outgoing payment."
+
+    await asyncio.sleep(1)
+
+    assert (
+        dispatch_webhook_mock.call_count == 1
+    ), "Webhook dispatched for the outgoing payment."
+    dispatched_payment = dispatch_webhook_mock.call_args_list[0][0][0]
+    assert dispatched_payment.payment_hash == payment.payment_hash
+    assert dispatched_payment.amount < 0, "Dispatched payment is the outgoing one."
+    assert dispatched_payment.webhook == webhook_url
+
+
+@pytest.mark.anyio
+async def test_pay_external_invoice_without_webhook_does_not_dispatch(
+    from_wallet: Wallet, mocker: MockerFixture, external_funding_source: FakeWallet
+):
+    invoice_amount = 2106
+    external_invoice = await external_funding_source.create_invoice(invoice_amount)
+    assert external_invoice.payment_request
+    assert external_invoice.checking_id
+
+    preimage = "0000000000000000000000000000000000000000000000000000000000002106"
+    mocker.patch(
+        "lnbits.wallets.FakeWallet.pay_invoice",
+        AsyncMock(
+            return_value=PaymentResponse(
+                ok=True, checking_id=external_invoice.checking_id, preimage=preimage
+            )
+        ),
+    )
+    dispatch_webhook_mock = mocker.patch(
+        "lnbits.core.services.notifications.dispatch_webhook",
+        AsyncMock(return_value=None),
+    )
+
+    payment = await pay_invoice(
+        wallet_id=from_wallet.id,
+        payment_request=external_invoice.payment_request,
+    )
+
+    _payment = await get_standalone_payment(payment.payment_hash)
+    assert _payment
+    assert _payment.status == PaymentState.SUCCESS.value
+    assert _payment.webhook is None
+
+    await asyncio.sleep(1)
+
+    assert dispatch_webhook_mock.call_count == 0, "No webhook, no dispatch."
+
+
 @pytest.mark.anyio
 async def test_retry_pay_success(
     from_wallet: Wallet, mocker: MockerFixture, external_funding_source: FakeWallet