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WEBHOOK
ACCOUNT_LOW_BALANCE
{
  "event":       "ACCOUNT_LOW_BALANCE",
  "eventId":     "evt_01HXY123456ABCDEF",
  "businessId":  "BUS1A2B3C4D5E6F",
  "environment": "LIVE",
  "timestamp":   "2026-05-22T14:00:00Z",
  "data": {
    "programId":      "prg_01HXYZ9876ABCDEF0000",
    "balanceCents":   250000,
    "thresholdCents": 500000,
    "timestamp":      "2026-05-22T14:00:00Z"
  }
}

{}

Documentation Index

Fetch the complete documentation index at: https://docs.fyatu.com/llms.txt

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Fires when a card funding operation causes the program ledger balance to fall below the lowBalanceThreshold configured for the program. Configure the threshold in the portal under Programs → Settings.

​
Event Type

ACCOUNT_LOW_BALANCE

​
Payload

{
  "event":       "ACCOUNT_LOW_BALANCE",
  "eventId":     "evt_01HXY123456ABCDEF",
  "businessId":  "BUS1A2B3C4D5E6F",
  "environment": "LIVE",
  "timestamp":   "2026-05-22T14:00:00Z",
  "data": {
    "programId":      "prg_01HXYZ9876ABCDEF0000",
    "balanceCents":   250000,
    "thresholdCents": 500000,
    "timestamp":      "2026-05-22T14:00:00Z"
  }
}

​
Payload Fields

FieldTypeDescription
programIdstringThe program with low balance
balanceCentsintegerCurrent program ledger balance in cents
thresholdCentsintegerThe configured low-balance threshold in cents
timestampstringISO 8601 timestamp
For the full event group documentation see Account Events. 
{
  "event":       "ACCOUNT_LOW_BALANCE",
  "eventId":     "evt_01HXY123456ABCDEF",
  "businessId":  "BUS1A2B3C4D5E6F",
  "environment": "LIVE",
  "timestamp":   "2026-05-22T14:00:00Z",
  "data": {
    "programId":      "prg_01HXYZ9876ABCDEF0000",
    "balanceCents":   250000,
    "thresholdCents": 500000,
    "timestamp":      "2026-05-22T14:00:00Z"
  }
}

{}

Authorizations

​
Authorization
string
header
required

API key from the FYATU CaaS portal. Pass as Authorization: Bearer <key>.

Body

application/json
​
event
string
Example:

"ACCOUNT_LOW_BALANCE"

​
eventId
string
​
businessId
string
​
environment
enum<string>
Available options:
LIVE,
SANDBOX
​
timestamp
string<date-time>
​
data
object

Response

200

Acknowledge the event.