​
This guide uses the following endpoints

​
To create a FedNow Send payment

  1. Check destination FI’s FedNow Receiving capability
  2. Get the Account ID
  3. Create the FedNow payment
  4. Get status updates

​
1. Check destination FI’s FedNow Receiving capability

Since FedNow is a relatively new payment rail, not all financial institutions (FIs) are set up to receive payments. To verify if a destination FI will accept FedNow payments, make a GET /fednow/routing_number/ request with the destination FI’s routing number. If both the online and receive fields return true, proceed to the next step. If either field returns false, you can either inform the end user that the FedNow payment cannot be completed because the destination FI doesn’t accept FedNow payments, or reroute the payment through a fallback payment rail, such as ACH. 
curl -u $API_KEY_ID:$API_SECRET_KEY https://api.treasuryprime.com/fednow/routing_number/110000994

​
2. Get the Account ID

Obtain the account ID for sending a FedNow payment by making a GET /account request, which returns a list of all accounts. 
curl -u $API_KEY_ID:$API_SECRET_KEY https://api.treasuryprime.com/account
Identify the id of the account you wish to send funds from. Verify that the account is neither locked nor closed before proceeding. 
{
    "tags": null,
    "account_type": "checking",
    "bank_id": "bank_example",
    "org_id": "org_fednow_example",
    "nickname": null,
    "updated_at": "2025-09-17T17:16:12Z",
    "currency": null,
    "routing_number": "026015024",
    "account_number": "2279603727",
    "id": "acct_11m2wpvk1afhmxd",
    "created_at": "2025-05-21T23:02:11Z",
    "userdata": null
},
{
    "tags": null,
    "account_type": "checking",
    "bank_id": "bank_example",
    "org_id": "org_fednow_example",
    "nickname": null,
    "updated_at": "2025-04-02T22:04:47Z",
    "currency": null,
    "routing_number": "026015024",
    "account_number": "511100003797",
    "id": "acct_11kyvd2a184kych",
    "created_at": "2025-04-02T22:03:54Z",
    "userdata": null
}

​
3. Create the FedNow payment

Create the FedNow payment by initiating a POST /fednow request. The security_context object requires two fields: ip_address (the originating requestor’s IP address) and user_agent (the originator’s browser or device). An optional originator_name field allows you to modify the sender name for third-party sender scenarios. 
curl --request POST \
  --url https://api.treasuryprime.com/fednow \
  --user $API_KEY_ID:$API_SECRET_KEY \
  --header 'Content-Type: application/json' \
  --data '{
            "account_id": "acct_11m2wpvk1afhmxd",
            "amount": "250.00",
            "external_name": "Adam Smith",
            "external_routing_number": "110000994",
            "external_account_number": "110022339940",
            "memo": "Payment for economic advice",
            "security_context": {
                "device_id": "2f4a3f0005614323a61ac09918d29129",
                "ip_address": "192.168.1.1",
                "user_agent": "Mozilla/5.0"
            }
          }'
Upon submitting, a new FedNow object is created with pending status. 
{
    "description": null,
    "amount": "250.00",
    "bank_id": "bank_example",
    "related_fednow_ids": [],
    "account_id": "acct_11krnje614s6p3j",
    "security_context": {
        "ip_address": "192.168.1.1",
        "user_agent": "Mozilla/5.0",
        "device_id": "2f4a3f0005614323a61ac09918d29129"
    },
    "fed_settlement_date": null,
    "org_id": "org_example",
    "payment_type": "debit",
    "external_status": null,
    "external_routing_number": "110000994",
    "updated_at": "2025-09-22T19:59:59Z",
    "currency": "USD",
    "status": "pending",
    "id": "fednow_11md3anz1fsags2",
    "payment_id": null,
    "external_name": "Adam Smith",
    "error": null,
    "external_account_number": "110022339940",
    "originator_name": null,
    "memo": "Payment for economic advice",
    "created_at": "2025-09-22T19:59:59Z"
}

​
status vs external_status clarification

The status field indicates the FedNow object’s current state within Treasury Prime’s system. In contrast, the external_status field shows how the payment is being processed at the external financial institution. For instance, a FedNow payment might have a status of sent (meaning Treasury Prime successfully transmitted it) while having an external_status of rejected (indicating the receiving financial institution declined to accept it). See below for a list of the various FedNow scenarios and their associated external_status.

​
Insufficient funds on account behavior

FedNow payments may occasionally fail due to insufficient funds in the sending account. When this happens, the FedNow object’s status will change to error, and the error field will display an insufficient funds message.

​
4. Get status updates

There are two ways to find out when the status of the FedNow payment has changed:

​
Manually checking for status updates

To retrieve the latest status of a FedNow payment, make a GET /fednow/{id} request with the FedNow object’s ID. 
curl -u $API_KEY_ID:$API_SECRET_KEY https://api.treasuryprime.com/fednow/fednow_11md3anz1fsags2
Notice that the status field has changed to sent and the external_status field has updated to done. 
{
    "description": null,
    "amount": "250.00",
    "bank_id": "bank_example",
    "related_fednow_ids": [],
    "account_id": "acct_11krnje614s6p3j",
    "security_context": {
        "ip_address": "192.168.1.1",
        "user_agent": "Mozilla/5.0",
        "device_id": "2f4a3f0005614323a61ac09918d29129"
    },
    "fed_settlement_date": null,
    "org_id": "org_example",
    "payment_type": "debit",
    "external_status": "done",
    "external_routing_number": "110000994",
    "updated_at": "2025-09-22T20:00:06Z",
    "currency": "USD",
    "status": "sent",
    "id": "fednow_11md3anz1fsags2",
    "payment_id": "20250922626060097P0Fpuc4iQR9ByM9cdZ",
    "external_name": "Adam Smith",
    "error": null,
    "external_account_number": "110022339940",
    "originator_name": null,
    "memo": "Payment for economic advice",
    "created_at": "2025-09-22T19:59:59Z"
}

​
Listening to status updates with webhooks

Set up a fednow.create webhook to receive notifications about newly created FedNow Send objects and a fednow.update webhook for status changes. For implementation examples, see the webhooks section in the FedNow Overview. Since FedNow is an instant payment system, transactions will progress through various statuses rapidly.

​
Modifying originator name on FedNow payment

When Programs originate a FedNow payment, the system automatically assigns a sender name—the primary person for personal accounts or the business name for business accounts. This name appears as the originator on the FedNow transaction at the receiving financial institution. Programs acting as Third Party Senders may need to modify this sender name. To customize the sender name, simply set the originator_name field to your desired value.
Modifying originator names may require bank approval. Please discuss with your bank partner(s) to implement.

​
FedNow Send scenarios and corresponding statuses

Most FedNow payments are accepted by the receiving financial institution (FI), though some may be rejected or placed in an “Accepted Without Post” status. The table below details the various FedNow Send scenarios with their corresponding external_status values.
ScenarioDescriptionExternal Status
AcceptedFedNow payment successfully sent and accepted by the receiving financial institution (FI).done
RejectedThe receiving FI rejected the FedNow payment and will send an inbound payment to return the funds.rejected
ACWPAccepted Without Post (ACWP) means the receiving FI received the payment but did not post the transaction. The receiving FI’s staff will manually review the transaction. During this review, the external status remains pending until a final decision is reached. There are three possible final outcomes listed below.pending
ACWP - AcceptedReceiving FI reviewed and accepted the payment, posting it to the recipient account.done
ACWP - BlockedReceiving FI reviewed and decided not to post the payment, and will not return the payment.blocked
ACWP - RejectedReceiving FI reviewed and rejected the payment. The receiving FI will initiate an inbound FedNow payment to return funds.rejected

​
Handling FedNow returns

While FedNow payments are described as irrevocable, in rare instances, the receiving financial institution may return a payment, typically when payments are rejected. When this happens, you’ll see a separate inbound FedNow transaction matching the amount of the original payment, with the related_fednow_ids field containing the original payment’s ID. You can use this ID to identify the payment as a return and notify the end user. Note that the status of the original payment will remain unchanged. Below is a return example for the FedNow payment originated in the steps above. Note that the related_fednow_ids field contains the original FedNow object ID, allowing you to connect this return with the initial payment. 
{
    "description": null,
    "amount": "250.00",
    "bank_id": "bank_example",
    "related_fednow_ids": [
        "fednow_11md3anz1fsags2"
    ],
    "account_id": "acct_11krnje614s6p3j",
    "security_context": null,
    "fed_settlement_date": "2025-07-03",
    "org_id": "org_example",
    "payment_type": "credit",
    "external_status": null,
    "external_routing_number": "011055555",
    "updated_at": "2025-09-22T22:42:53Z",
    "currency": "USD",
    "status": "done",
    "id": "fednow_11m6d97w1c3bx8x",
    "payment_id": "202507036260600971yMpCkrY8ynQVP5so5",
    "external_name": "Adam Smith",
    "error": null,
    "external_account_number": "110000994433",
    "originator_name": null,
    "memo": null,
    "created_at": "2025-09-22T22:42:52Z"
}