Installment Request

Create an installment payment with a selected installment card and month plan. Use the Get Installments endpoint first to retrieve available options.

POST

***

Request Parameters

Name	Type	Description
`public_key`Required	`String`	Merchant identifier. Example: `i000000001`
`amount`Required	`Number`	Payment amount. Example: `100`, `20.50`
`currency`Required	`String`	Payment currency. Values: `AZN`, `USD`, `EUR`, `RUB`
`language`Required	`String`	Page display language. Values: `az`, `en`, `ru`
`order_id`Required	`String`	Unique order ID. Max 250 characters.
`installment_card_id`Required	`String`	Installment card identifier from the [Get Installments](/installment/get-installment-request) response.
`installment_month`Required	`Number`	Selected installment month from available options. Example: `3`, `6`, `12`
`description`Optional	`String`	Description. Max 1000 characters.
`success_redirect_url`Optional	`String`	Redirect URL on success.
`error_redirect_url`Optional	`String`	Redirect URL on failure.
`other_attr`Optional	`Array`	Additional parameters. Max 1000 characters.

Request Example

Send Request

Payload

{
  "public_key": "i000000001",
  "amount": 600,
  "currency": "AZN",
  "language": "az",
  "order_id": "order-456",
  "installment_card_id": "1",
  "installment_month": 6
}

1DATA=$(echo -n '{"public_key":"i000000001","amount":600,"currency":"AZN","language":"az","order_id":"order-456","installment_card_id":"1","installment_month":6}' | base64)
2SIGNATURE=$(echo -n "$PRIVATE_KEY$DATA$PRIVATE_KEY" | openssl dgst -sha1 -binary | base64)
3
4curl -X POST *** \
5-H "Content-Type: application/x-www-form-urlencoded" \
6-d "data=$DATA&signature=$SIGNATURE"

Response Parameters

Name	Type	Description
`status`Required	`String`	Operation result: `success` or `error`
`redirect_url`Optional	`String`	URL to redirect the customer to the bank payment page. Present on success.
`transaction`Optional	`String`	Epoint transaction identifier. Present on success.
`message`Optional	`String`	Error description. Present on failure.
`trace_id`Required	`String`	Unique request identifier for debugging. Provide this to Epoint support for issue investigation.

Success

Success Response
{
  "status": "success",
  "redirect_url": "***",
  "transaction": "te_0000000001",
  "trace_id": "a1b2c3d4e5f6a7b8c9d0e1f2a3b4c5d6"
}