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API Reference
Estimate an upcoming fee
Estimate the fees that would be created after reception of an event for a billable metric attached to one or multiple pay in advance charges.
Bearer authentication header of the form Bearer <token>, where <token> is your auth token.
The code that identifies a targeted billable metric. It is essential that this code matches the code property of one of your active billable metrics. If the provided code does not correspond to any active billable metric, it will be ignored during the process.
The customer external unique identifier (provided by your own application). This field is optional if you send the external_subscription_id, targeting a specific subscription.
This field is deprecated and is no longer supported or maintained. Please use the external_subscription_id instead.
The unique identifier of the subscription within your application. It is a mandatory field when the customer possesses multiple subscriptions or when the external_customer_id is not provided.
This field represents additional properties associated with the event, which are utilized in the calculation of the final fee. This object becomes mandatory when the targeted billable metric employs a sum_agg, max_agg, or unique_count_agg aggregation method. However, when using a simple count_agg, this object is not required.
LAGO_URL="https://api.getlago.com"
API_KEY="__YOUR_API_KEY__"
curl --location --request POST "$LAGO_URL/api/v1/events/estimate_fees" \
--header "Authorization: Bearer $API_KEY" \
--header 'Content-Type: application/json' \
--data-raw '{
"event": {
"external_subscription_id": "__YOUR_SUBSCRIPTION_ID__",
"code": "__BILLABLE_METRIC_CODE__",
"properties": {
"custom_field": 12,
}
}
}'
{
"fees": [
{
"lago_id": "1a901a90-1a90-1a90-1a90-1a901a901a90",
"lago_group_id": "1a901a90-1a90-1a90-1a90-1a901a901a90",
"lago_charge_filter_id": "1a901a90-1a90-1a90-1a90-1a901a901a90",
"lago_invoice_id": "1a901a90-1a90-1a90-1a90-1a901a901a90",
"lago_true_up_fee_id": "1a901a90-1a90-1a90-1a90-1a901a901a90",
"lago_true_up_parent_fee_id": "1a901a90-1a90-1a90-1a90-1a901a901a90",
"lago_subscription_id": "1a901a90-1a90-1a90-1a90-1a901a901a90",
"lago_customer_id": "1a901a90-1a90-1a90-1a90-1a901a901a90",
"external_customer_id": "external_id",
"external_subscription_id": "external_id",
"invoice_display_name": "Setup Fee (SF1)",
"amount_cents": 100,
"amount_currency": "EUR",
"taxes_amount_cents": 20,
"taxes_rate": 20,
"units": "0.32",
"precise_unit_amount": "312.5",
"total_amount_cents": 120,
"total_amount_currency": "EUR",
"events_count": 23,
"pay_in_advance": true,
"invoiceable": true,
"from_date": "2022-04-29T08:59:51Z",
"to_date": "2022-05-29T08:59:51Z",
"payment_status": "pending",
"created_at": "2022-08-24T14:58:59Z",
"succeeded_at": "2022-08-24T14:58:59Z",
"failed_at": "2022-08-24T14:58:59Z",
"refunded_at": "2022-08-24T14:58:59Z",
"event_transaction_id": "transaction_1234567890",
"amount_details": {
"graduated_ranges": [
{
"units": "10.0",
"from_value": 123,
"to_value": 10,
"flat_unit_amount": "1.0",
"per_unit_amount": "1.0",
"per_unit_total_amount": "10.0",
"total_with_flat_amount": "11.0"
}
],
"graduated_percentage_ranges": [
{
"units": "10.0",
"from_value": 123,
"to_value": 10,
"flat_unit_amount": "1.0",
"rate": "1.0",
"per_unit_total_amount": "10.0",
"total_with_flat_amount": "11.0"
}
],
"free_units": "10.0",
"paid_units": "40.0",
"per_package_size": 1000,
"per_package_unit_amount": "0.5",
"units": "20.0",
"free_events": 10,
"rate": "1.0",
"per_unit_total_amount": "10.0",
"paid_events": 20,
"fixed_fee_unit_amount": "1.0",
"fixed_fee_total_amount": "20.0",
"min_max_adjustment_total_amount": "20.0",
"volume_ranges": [
{
"per_unit_amount": "0.5",
"flat_unit_amount": "10.0",
"per_unit_total_amount": "10.0"
}
]
},
"item": {
"type": "subscription",
"code": "startup",
"name": "Startup",
"invoice_display_name": "Setup Fee (SF1)",
"filter_invoice_display_name": "AWS eu-east-1",
"filters": {},
"group_invoice_display_name": "Transactions - ACH",
"lago_item_id": "1a901a90-1a90-1a90-1a90-1a901a901a90",
"item_type": "Subscription",
"grouped_by": {}
},
"applied_taxes": [
{
"lago_id": "1a901a90-1a90-1a90-1a90-1a901a901a90",
"lago_tax_id": "1a901a90-1a90-1a90-1a90-1a901a901a90",
"tax_name": "TVA",
"tax_code": "french_standard_vat",
"tax_rate": 20,
"tax_description": "French standard VAT",
"amount_cents": 2000,
"amount_currency": "USD",
"created_at": "2022-09-14T16:35:31Z",
"lago_fee_id": "1a901a90-1a90-1a90-1a90-1a901a901a90"
}
]
}
]
}Authorizations
Bearer authentication header of the form Bearer <token>, where <token> is your auth token.
Body
The code that identifies a targeted billable metric. It is essential that this code matches the code property of one of your active billable metrics. If the provided code does not correspond to any active billable metric, it will be ignored during the process.
The customer external unique identifier (provided by your own application). This field is optional if you send the external_subscription_id, targeting a specific subscription.
This field is deprecated and is no longer supported or maintained. Please use the external_subscription_id instead.
The unique identifier of the subscription within your application. It is a mandatory field when the customer possesses multiple subscriptions or when the external_customer_id is not provided.
This field represents additional properties associated with the event, which are utilized in the calculation of the final fee. This object becomes mandatory when the targeted billable metric employs a sum_agg, max_agg, or unique_count_agg aggregation method. However, when using a simple count_agg, this object is not required.
Response
Unique identifier assigned to the fee within the Lago application. This ID is exclusively created by Lago and serves as a unique identifier for the fee’s record within the Lago system.
Unique identifier assigned to the group that the fee belongs to
Unique identifier assigned to the charge filter that the fee belongs to
Unique identifier assigned to the invoice that the fee belongs to
Unique identifier assigned to the true-up fee when a minimum has been set to the charge. This identifier helps to distinguish and manage the true-up fee associated with the charge, which may be applicable when a minimum threshold or limit is set for the charge amount.
Unique identifier assigned to the parent fee on which the true-up fee is assigned. This identifier establishes the relationship between the parent fee and the associated true-up fee.
Unique identifier assigned to the subscription, created by Lago. This field is specifically displayed when the fee type is charge or subscription.
Unique identifier assigned to the customer, created by Lago. This field is specifically displayed when the fee type is charge or subscription.
Unique identifier assigned to the customer in your application. This field is specifically displayed when the fee type is charge or subscription.
Unique identifier assigned to the subscription in your application. This field is specifically displayed when the fee type is charge or subscription.
Specifies the name that will be displayed on an invoice. If no value is set for this field, the name of the actual charge will be used as the default display name.
The cost of this specific fee, excluding any applicable taxes.
The currency of this specific fee. It indicates the monetary unit in which the fee’s cost is expressed.
AED, AFN, ALL, AMD, ANG, AOA, ARS, AUD, AWG, AZN, BAM, BBD, BDT, BGN, BIF, BMD, BND, BOB, BRL, BSD, BWP, BYN, BZD, CAD, CDF, CHF, CLF, CLP, CNY, COP, CRC, CVE, CZK, DJF, DKK, DOP, DZD, EGP, ETB, EUR, FJD, FKP, GBP, GEL, GIP, GMD, GNF, GTQ, GYD, HKD, HNL, HRK, HTG, HUF, IDR, ILS, INR, ISK, JMD, JPY, KES, KGS, KHR, KMF, KRW, KYD, KZT, LAK, LBP, LKR, LRD, LSL, MAD, MDL, MGA, MKD, MMK, MNT, MOP, MRO, MUR, MVR, MWK, MXN, MYR, MZN, NAD, NGN, NIO, NOK, NPR, NZD, PAB, PEN, PGK, PHP, PKR, PLN, PYG, QAR, RON, RSD, RUB, RWF, SAR, SBD, SCR, SEK, SGD, SHP, SLL, SOS, SRD, STD, SZL, THB, TJS, TOP, TRY, TTD, TWD, TZS, UAH, UGX, USD, UYU, UZS, VND, VUV, WST, XAF, XCD, XOF, XPF, YER, ZAR, ZMW The cost of the tax associated with this specific fee.
The tax rate associated with this specific fee.
The number of units used to charge the customer. This field indicates the quantity or count of units consumed or utilized in the context of the charge. It helps in determining the basis for calculating the fee or cost associated with the usage of the service or product provided to the customer.
The unit amount of the fee per unit, with precision.
The cost of this specific fee, including any applicable taxes.
The currency of this specific fee, including any applicable taxes.
AED, AFN, ALL, AMD, ANG, AOA, ARS, AUD, AWG, AZN, BAM, BBD, BDT, BGN, BIF, BMD, BND, BOB, BRL, BSD, BWP, BYN, BZD, CAD, CDF, CHF, CLF, CLP, CNY, COP, CRC, CVE, CZK, DJF, DKK, DOP, DZD, EGP, ETB, EUR, FJD, FKP, GBP, GEL, GIP, GMD, GNF, GTQ, GYD, HKD, HNL, HRK, HTG, HUF, IDR, ILS, INR, ISK, JMD, JPY, KES, KGS, KHR, KMF, KRW, KYD, KZT, LAK, LBP, LKR, LRD, LSL, MAD, MDL, MGA, MKD, MMK, MNT, MOP, MRO, MUR, MVR, MWK, MXN, MYR, MZN, NAD, NGN, NIO, NOK, NPR, NZD, PAB, PEN, PGK, PHP, PKR, PLN, PYG, QAR, RON, RSD, RUB, RWF, SAR, SBD, SCR, SEK, SGD, SHP, SLL, SOS, SRD, STD, SZL, THB, TJS, TOP, TRY, TTD, TWD, TZS, UAH, UGX, USD, UYU, UZS, VND, VUV, WST, XAF, XCD, XOF, XPF, YER, ZAR, ZMW The number of events that have been sent and used to charge the customer. This field indicates the count or quantity of events that have been processed and considered in the charging process.
Flag that indicates whether the fee was paid in advance. It serves as a boolean value, where true represents that the fee was paid in advance (straightaway), and false indicates that the fee was not paid in arrears (at the end of the period).
Flag that indicates whether the fee was included on the invoice. It serves as a boolean value, where true represents that the fee was included on the invoice, and false indicates that the fee was not included on the invoice.
The beginning date of the period that the fee covers. It is applicable only to subscription and charge fees. This field indicates the start date of the billing period or subscription period associated with the fee.
The ending date of the period that the fee covers. It is applicable only to subscription and charge fees. This field indicates the end date of the billing period or subscription period associated with the fee.
Indicates the payment status of the fee. It represents the current status of the payment associated with the fee. The possible values for this field are pending, succeeded, failed and refunded.
pending, succeeded, failed, refunded The date and time when the fee was created. It is provided in Coordinated Universal Time (UTC) format.
The date and time when the payment for the fee was successfully processed. It is provided in Coordinated Universal Time (UTC) format.
The date and time when the payment for the fee failed to process. It is provided in Coordinated Universal Time (UTC) format.
The date and time when the payment for the fee was refunded. It is provided in Coordinated Universal Time (UTC) format
Unique identifier assigned to the transaction. This field is specifically displayed when the fee type is charge and the payment for the fee is made in advance (pay_in_advance is set to true).
List of all unit amount details for calculating the fee.
Graduated ranges, used for a graduated charge model.
Total units received in Lago.
Lower value of a tier. It is either 0 or the previous range's to_value + 1.
Highest value of a tier.
- This value is higher than the from_value of the same tier.
- This value is null for the last tier.
Flat unit amount within a specified tier.
Amount per unit within a specified tier.
Total amount of received units to be charged within a specified tier.
Total amount to be charged for a specific tier, taking into account the flat_unit_amount and the per_unit_total_amount.
Graduated percentage ranges, used for a graduated_percentage charge model.
Total units received in Lago.
Lower value of a tier. It is either 0 or the previous range's to_value + 1.
Highest value of a tier.
- This value is higher than the from_value of the same tier.
- This value is null for the last tier.
Flat unit amount within a specified tier.
Percentage rate applied within a specified tier.
Total amount of received units to be charged within a specified tier.
Total amount to be charged for a specific tier, taking into account the flat_unit_amount and the per_unit_total_amount.
The quantity of units that are provided free of charge for each billing period in a package charge model.
The quantity of units that are not provided free of charge for each billing period in a package charge model.
The quantity of units included, defined for Package or Percentage charge model.
Total amount to charge for received paid_units, defined for Package or Percentage charge model.
The total units received in Lago for the Percentage charge model.
Total number of free events allowed for the Percentage charge model.
Percentage rate applied for the Percentage charge model.
Total amount of received units to be charged for the Percentage charge model.
Total number of paid events for the Percentage charge model.
Fixed fee unit price per received paid_event for the Percentage charge model.
Total amount to charge for received paid_events for the Percentage charge model.
Total adjustment amount linked to minimum and maximum spending per transaction for the Percentage charge model.
Volume ranges, used for a volume charge model.
The flat amount for a whole tier, excluding tax, for a volume charge model.
The unit price, excluding tax, for a specific tier of a volume charge model.
Total amount of received units to be charged.
Item attached to the fee
The fee type. Possible values are add-on, charge, credit or subscription.
charge, add_on, subscription, credit The code of the fee item. It can be the code of the add-on, the code of the charge, the code of the credit or the code of the subscription.
The name of the fee item. It can be the name of the add-on, the name of the charge, the name of the credit or the name of the subscription.
Specifies the name that will be displayed on an invoice. If no value is set for this field, the name of the actual charge will be used as the default display name.
Specifies the name that will be displayed on an invoice. If no value is set for this field, the actual charge filter values will be used as the default display name.
Key value list of event properties
Specifies the name that will be displayed on an invoice. If no value is set for this field, the name of the actual charge will be used as the default display name.
Unique identifier of the fee item, created by Lago. It can be the identifier of the add-on, the identifier of the charge, the identifier of the credit or the identifier of the subscription.
The type of the fee item. Possible values are AddOn, BillableMetric, WalletTransaction or Subscription.
AddOn, BillableMetric, Subscription, WalletTransaction Key value list of event properties aggregated by the charge model
List of fee applied taxes
Unique identifier of the applied tax, created by Lago.
Unique identifier of the tax, created by Lago.
Name of the tax.
Unique code used to identify the tax associated with the API request.
The percentage rate of the tax
Internal description of the taxe
Amount of the tax
Currency of the tax
AED, AFN, ALL, AMD, ANG, AOA, ARS, AUD, AWG, AZN, BAM, BBD, BDT, BGN, BIF, BMD, BND, BOB, BRL, BSD, BWP, BYN, BZD, CAD, CDF, CHF, CLF, CLP, CNY, COP, CRC, CVE, CZK, DJF, DKK, DOP, DZD, EGP, ETB, EUR, FJD, FKP, GBP, GEL, GIP, GMD, GNF, GTQ, GYD, HKD, HNL, HRK, HTG, HUF, IDR, ILS, INR, ISK, JMD, JPY, KES, KGS, KHR, KMF, KRW, KYD, KZT, LAK, LBP, LKR, LRD, LSL, MAD, MDL, MGA, MKD, MMK, MNT, MOP, MRO, MUR, MVR, MWK, MXN, MYR, MZN, NAD, NGN, NIO, NOK, NPR, NZD, PAB, PEN, PGK, PHP, PKR, PLN, PYG, QAR, RON, RSD, RUB, RWF, SAR, SBD, SCR, SEK, SGD, SHP, SLL, SOS, SRD, STD, SZL, THB, TJS, TOP, TRY, TTD, TWD, TZS, UAH, UGX, USD, UYU, UZS, VND, VUV, WST, XAF, XCD, XOF, XPF, YER, ZAR, ZMW The date and time when the applied tax was created. It is expressed in UTC format according to the ISO 8601 datetime standard. This field provides the timestamp for the exact moment when the applied tax was initially created.
Unique identifier of the fee, created by Lago.
Was this page helpful?
LAGO_URL="https://api.getlago.com"
API_KEY="__YOUR_API_KEY__"
curl --location --request POST "$LAGO_URL/api/v1/events/estimate_fees" \
--header "Authorization: Bearer $API_KEY" \
--header 'Content-Type: application/json' \
--data-raw '{
"event": {
"external_subscription_id": "__YOUR_SUBSCRIPTION_ID__",
"code": "__BILLABLE_METRIC_CODE__",
"properties": {
"custom_field": 12,
}
}
}'
{
"fees": [
{
"lago_id": "1a901a90-1a90-1a90-1a90-1a901a901a90",
"lago_group_id": "1a901a90-1a90-1a90-1a90-1a901a901a90",
"lago_charge_filter_id": "1a901a90-1a90-1a90-1a90-1a901a901a90",
"lago_invoice_id": "1a901a90-1a90-1a90-1a90-1a901a901a90",
"lago_true_up_fee_id": "1a901a90-1a90-1a90-1a90-1a901a901a90",
"lago_true_up_parent_fee_id": "1a901a90-1a90-1a90-1a90-1a901a901a90",
"lago_subscription_id": "1a901a90-1a90-1a90-1a90-1a901a901a90",
"lago_customer_id": "1a901a90-1a90-1a90-1a90-1a901a901a90",
"external_customer_id": "external_id",
"external_subscription_id": "external_id",
"invoice_display_name": "Setup Fee (SF1)",
"amount_cents": 100,
"amount_currency": "EUR",
"taxes_amount_cents": 20,
"taxes_rate": 20,
"units": "0.32",
"precise_unit_amount": "312.5",
"total_amount_cents": 120,
"total_amount_currency": "EUR",
"events_count": 23,
"pay_in_advance": true,
"invoiceable": true,
"from_date": "2022-04-29T08:59:51Z",
"to_date": "2022-05-29T08:59:51Z",
"payment_status": "pending",
"created_at": "2022-08-24T14:58:59Z",
"succeeded_at": "2022-08-24T14:58:59Z",
"failed_at": "2022-08-24T14:58:59Z",
"refunded_at": "2022-08-24T14:58:59Z",
"event_transaction_id": "transaction_1234567890",
"amount_details": {
"graduated_ranges": [
{
"units": "10.0",
"from_value": 123,
"to_value": 10,
"flat_unit_amount": "1.0",
"per_unit_amount": "1.0",
"per_unit_total_amount": "10.0",
"total_with_flat_amount": "11.0"
}
],
"graduated_percentage_ranges": [
{
"units": "10.0",
"from_value": 123,
"to_value": 10,
"flat_unit_amount": "1.0",
"rate": "1.0",
"per_unit_total_amount": "10.0",
"total_with_flat_amount": "11.0"
}
],
"free_units": "10.0",
"paid_units": "40.0",
"per_package_size": 1000,
"per_package_unit_amount": "0.5",
"units": "20.0",
"free_events": 10,
"rate": "1.0",
"per_unit_total_amount": "10.0",
"paid_events": 20,
"fixed_fee_unit_amount": "1.0",
"fixed_fee_total_amount": "20.0",
"min_max_adjustment_total_amount": "20.0",
"volume_ranges": [
{
"per_unit_amount": "0.5",
"flat_unit_amount": "10.0",
"per_unit_total_amount": "10.0"
}
]
},
"item": {
"type": "subscription",
"code": "startup",
"name": "Startup",
"invoice_display_name": "Setup Fee (SF1)",
"filter_invoice_display_name": "AWS eu-east-1",
"filters": {},
"group_invoice_display_name": "Transactions - ACH",
"lago_item_id": "1a901a90-1a90-1a90-1a90-1a901a901a90",
"item_type": "Subscription",
"grouped_by": {}
},
"applied_taxes": [
{
"lago_id": "1a901a90-1a90-1a90-1a90-1a901a901a90",
"lago_tax_id": "1a901a90-1a90-1a90-1a90-1a901a901a90",
"tax_name": "TVA",
"tax_code": "french_standard_vat",
"tax_rate": 20,
"tax_description": "French standard VAT",
"amount_cents": 2000,
"amount_currency": "USD",
"created_at": "2022-09-14T16:35:31Z",
"lago_fee_id": "1a901a90-1a90-1a90-1a90-1a901a901a90"
}
]
}
]
}