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POST
/
inject
curl -X POST http://localhost:8081/inject \
  -H "Content-Type: application/json" \
  -d '{
    "amount": 5000.00,
    "currency": "USD",
    "transaction_id": "txn_ref_001",
    "source": "balance_123",
    "destination": "balance_456",
    "description": "High-value transfer",
    "created_at": "2026-03-16T09:00:00Z",
    "meta_data": {
      "merchant_category": "finance",
      "country": "US"
    }
  }'

{
  "transaction_id": "0f81a4e1-2b8d-496b-8d5d-a4e1e980f1a6",
  "message": "Call GET /transactions/{id} to fetch the processed transaction or set ALERT_WEBHOOK_URL to get webhooks when a rule triggers for the transaction."
}
Blnk Watch is currently in beta. Send us a message
When using Watch, use this endpoint to inject a transaction into the service for real-time risk evaluation.
Any extra Blnk attributes you want rules to use should be sent inside meta_data.
The field names match Blnk transaction naming — transaction_id, amount, currency, source, destination, created_at, meta_data — so mapping from Blnk Core stays predictable.

​
Body

​
amount
number
The transaction amount to evaluate.
​
currency
string
The three-letter ISO currency code. For example, USD.
​
transaction_id
string
A unique identifier for the transaction. If not provided, Watch generates a UUID.
​
source
string
The source balance identifier.
​
destination
string
The destination balance identifier.
​
description
string
A free-form description of the transaction.
​
created_at
string
The transaction timestamp in ISO 8601 format. If not provided, Watch uses the current server time.
​
meta_data
object
Additional metadata as key-value pairs. Use this to pass Blnk attributes needed by your rules.
curl -X POST http://localhost:8081/inject \
  -H "Content-Type: application/json" \
  -d '{
    "amount": 5000.00,
    "currency": "USD",
    "transaction_id": "txn_ref_001",
    "source": "balance_123",
    "destination": "balance_456",
    "description": "High-value transfer",
    "created_at": "2026-03-16T09:00:00Z",
    "meta_data": {
      "merchant_category": "finance",
      "country": "US"
    }
  }'

{
  "transaction_id": "0f81a4e1-2b8d-496b-8d5d-a4e1e980f1a6",
  "message": "Call GET /transactions/{id} to fetch the processed transaction or set ALERT_WEBHOOK_URL to get webhooks when a rule triggers for the transaction."
}

​
Need help?

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