Create Session
The Create Session endpoint accepts data about a customer's finances and lending scenario, which it stores in the database as a "session" and returns a SessionID parameter that can be used to load the data from that session in the Mortgage Recommendation Engine's UI.
Request
- Type:
POST - Path:
/sessions/create
Endpoint
The Create Session endpoint can be accessed from the following URLs:
| Environment | Endpoint URL |
| Test | https://api.mre.test.blackfin.tools/sessions/create |
| Production | https://api.mre.blackfin.tools/sessions/create |
Authentication
An API_Key is required to call this endpoint. HTTP Bearer Token authentication is used.
JSON Schema
The request payload is sent as HTTP JSON body using the following schema:
{
"$schema": "http://json-schema.org/draft-07/schema#",
"title": "Request JSON Payload",
"type": "object",
"properties": {
"Session": {
"type": "object",
"properties": {
"ExternalID": {
"type": "string",
"description": "External ID, for example a user ID to link the session to"
}
},
"required": [
"ExternalID"
]
},
"Details": {
"type": "object",
"description": "Main calculation details for mortgage calculation, see [CalculationDetails](https://docs.blackfin.tools/books/mortgagerecenginebackend/page/calculationdetails) schema"
},
"Lenders": {
"type": "array",
"description": "[Lender codes](https://docs.blackfin.tools/books/mortgagerecenginemycrm/page/lenders) to include in calculation. If no Lenders are passed (empty array), the calc will return ASB, ANZ, BNZ, AIA and Westpac by default",
"items": {
"type": "string",
"description": "",
"enum": [
"aia",
"anz",
"asb",
"bnz",
"co-op",
"kiwibank",
"liberty",
"sbs",
"tsb",
"westpac"
]
}
}
},
"required": [
"Details",
"Lenders"
]
}Examples
Example request payload:
JSON Request Body
{
"Session": {
"ExternalID": ""
},
"Details": {
"Loan": [
{
"LoanType": "New",
"Lender": null,
"LendingAction": null,
"LiabilityType": "HomeLoan",
"LoanAmount": 250000,
"TopUpAmount": null,
"TotalTermMonths": 180,
"InterestOnlyTermMonths": 180,
"Security": {
"Value": 300000,
"IsRBNZExempt": true,
"Location": null,
"PropertyType": [
"ResidentialProperty",
"FreeHoldResidential",
null
],
"SecurityType": "Proposed",
"UsageType": "OwnerOccupied"
},
"LoanId": 1
},
{
"LoanType": "Existing",
"Lender": null,
"LendingAction": "TopUp",
"LiabilityType": "HomeLoan",
"LoanAmount": 250000,
"TopUpAmount": 50000,
"TotalTermMonths": 183,
"InterestOnlyTermMonths": 219,
"Security": {
"Value": 300000,
"isRBNZExempt": false,
"Location": null,
"PropertyType": [
"ResidentialProperty",
"FreeHoldResidential",
null
],
"SecurityType": "Existing",
"UsageType": "OwnerOccupied"
},
"LoanId": 2
},
{
"LoanType": "Existing",
"Lender": null,
"LendingAction": "Refinance",
"LiabilityType": "HomeLoan",
"LoanAmount": 260000,
"TopUpAmount": null,
"TotalTermMonths": 180,
"InterestOnlyTermMonths": 216,
"Security": {
"Value": 300000,
"isRBNZExempt": false,
"Location": null,
"PropertyType": [
"ResidentialProperty",
"FreeHoldResidential",
null
],
"SecurityType": "Proposed",
"UsageType": "OwnerOccupied"
},
"LoanId": 3
},
{
"LoanType": "Existing",
"Lender": null,
"LendingAction": "Refinance",
"LiabilityType": "HomeLoan",
"LoanAmount": 370000,
"TopUpAmount": null,
"TotalTermMonths": 144,
"InterestOnlyTermMonths": 0,
"Security": {
"Value": 410000,
"isRBNZExempt": false,
"Location": null,
"PropertyType": [
null,
null,
null
],
"SecurityType": "Proposed",
"UsageType": null
},
"LoanId": 4
},
{
"LoanType": "Existing",
"Lender": null,
"LendingAction": "TopUp",
"LiabilityType": "HomeLoan",
"LoanAmount": 200000,
"TopUpAmount": 50000,
"TotalTermMonths": 180,
"InterestOnlyTermMonths": 0,
"Security": {
"Value": 210000,
"isRBNZExempt": false,
"Location": null,
"PropertyType": [
null,
null,
null
],
"SecurityType": "Proposed",
"UsageType": null
},
"LoanId": 5
}
],
"ApplicantParty": [
{
"Applicant": [
{
"ApplicantId": 1,
"Name": "Terence"
},
{
"ApplicantId": 2,
"Name": "Eve"
}
],
"Expense": [
{
"ApplicantId": 1,
"ExpenseType": "ChildCare",
"Frequency": "Monthly",
"Amount": 300
},
{
"ApplicantId": 1,
"ExpenseType": "ChildMaintenance",
"Frequency": "Monthly",
"Amount": 10
},
{
"ApplicantId": 1,
"ExpenseType": "HigherEducationAndVocationalTraining",
"Frequency": "Monthly",
"Amount": 200
},
{
"ApplicantId": 1,
"ExpenseType": "OtherEducation",
"Frequency": "Monthly",
"Amount": 100
},
{
"ApplicantId": 1,
"ExpenseType": "PrivateSchoolCosts",
"Frequency": "Monthly",
"Amount": 300
},
{
"ApplicantId": 1,
"ExpenseType": "PublicSchoolCosts",
"Frequency": "Monthly",
"Amount": 150
},
{
"ApplicantId": 1,
"ExpenseType": "Groceries",
"Frequency": "Monthly",
"Amount": 200
},
{
"ApplicantId": 1,
"ExpenseType": "OtherGroceries",
"Frequency": "Monthly",
"Amount": 150
},
{
"ApplicantId": 1,
"ExpenseType": "BodyCorporatePrimaryResidence",
"Frequency": "Monthly",
"Amount": 10
},
{
"ApplicantId": 1,
"ExpenseType": "CouncilRatesPrimaryResidence",
"Frequency": "Monthly",
"Amount": 10
},
{
"ApplicantId": 1,
"ExpenseType": "ElectricityAndGasPrimaryResidence",
"Frequency": "Monthly",
"Amount": 100
},
{
"ApplicantId": 1,
"ExpenseType": "FurnishingsAndElectrical",
"Frequency": "Monthly",
"Amount": 10
},
{
"ApplicantId": 1,
"ExpenseType": "HomeOperation",
"Frequency": "Monthly",
"Amount": 10
},
{
"ApplicantId": 1,
"ExpenseType": "HomeRepairs",
"Frequency": "Monthly",
"Amount": 10
},
{
"ApplicantId": 1,
"ExpenseType": "OtherPrimaryResidenceExpense",
"Frequency": "Monthly",
"Amount": 10
},
{
"ApplicantId": 1,
"ExpenseType": "WaterAndSewerPrimaryResidence",
"Frequency": "Monthly",
"Amount": 10
},
{
"ApplicantId": 1,
"ExpenseType": "BuildingInsurance",
"Frequency": "Monthly",
"Amount": 10
},
{
"ApplicantId": 1,
"ExpenseType": "ContentsInsurance",
"Frequency": "Monthly",
"Amount": 10
},
{
"ApplicantId": 1,
"ExpenseType": "HealthInsurance",
"Frequency": "Monthly",
"Amount": 10
},
{
"ApplicantId": 1,
"ExpenseType": "IncomeProtection",
"Frequency": "Monthly",
"Amount": 10
},
{
"ApplicantId": 1,
"ExpenseType": "LifeInsurance",
"Frequency": "Monthly",
"Amount": 10
},
{
"ApplicantId": 1,
"ExpenseType": "OtherInsurance",
"Frequency": "Monthly",
"Amount": 10
},
{
"ApplicantId": 1,
"ExpenseType": "VehicleInsurance",
"Frequency": "Monthly",
"Amount": 10
},
{
"ApplicantId": 1,
"ExpenseType": "BodyCorporateInvestmentProperty",
"Frequency": "Monthly",
"Amount": 10
},
{
"ApplicantId": 1,
"ExpenseType": "BuildingInsuranceInvestmentProperty",
"Frequency": "Monthly",
"Amount": 10
},
{
"ApplicantId": 1,
"ExpenseType": "CouncilRatesInvestmentProperty",
"Frequency": "Monthly",
"Amount": 10
},
{
"ApplicantId": 1,
"ExpenseType": "ElectricityAndGasInvestmentProperty",
"Frequency": "Monthly",
"Amount": 10
},
{
"ApplicantId": 1,
"ExpenseType": "OtherInvestmentPropertyExpense",
"Frequency": "Monthly",
"Amount": 10
},
{
"ApplicantId": 1,
"ExpenseType": "RepairsAndMaintenanceInvestmentProperty",
"Frequency": "Monthly",
"Amount": 10
},
{
"ApplicantId": 1,
"ExpenseType": "RunningCostsInvestmentProperty",
"Frequency": "Monthly",
"Amount": 10
},
{
"ApplicantId": 1,
"ExpenseType": "WaterAndSewerInvestmentProperty",
"Frequency": "Monthly",
"Amount": 200
},
{
"ApplicantId": 1,
"ExpenseType": "ContentsInsuranceSecondaryResidence",
"Frequency": "Monthly",
"Amount": 10
},
{
"ApplicantId": 1,
"ExpenseType": "BodyCorporateSecondaryResidence",
"Frequency": "Monthly",
"Amount": 10
},
{
"ApplicantId": 1,
"ExpenseType": "BuildingInsuranceSecondaryResidence",
"Frequency": "Monthly",
"Amount": 10
},
{
"ApplicantId": 1,
"ExpenseType": "CouncilRatesSecondaryResidence",
"Frequency": "Monthly",
"Amount": 10
},
{
"ApplicantId": 1,
"ExpenseType": "ElectricityAndGasSecondaryResidence",
"Frequency": "Monthly",
"Amount": 10
},
{
"ApplicantId": 1,
"ExpenseType": "OtherSecondaryResidenceExpense",
"Frequency": "Monthly",
"Amount": 10
},
{
"ApplicantId": 1,
"ExpenseType": "RepairsAndMaintenanceSecondaryResidence",
"Frequency": "Monthly",
"Amount": 10
},
{
"ApplicantId": 1,
"ExpenseType": "RunningCostsSecondaryResidence",
"Frequency": "Monthly",
"Amount": 10
},
{
"ApplicantId": 1,
"ExpenseType": "WaterAndSewerSecondaryResidence",
"Frequency": "Monthly",
"Amount": 10
},
{
"ApplicantId": 1,
"ExpenseType": "MedicalAndHealth",
"Frequency": "Monthly",
"Amount": 10
},
{
"ApplicantId": 1,
"ExpenseType": "NaturalTherapies",
"Frequency": "Monthly",
"Amount": 10
},
{
"ApplicantId": 1,
"ExpenseType": "Board",
"Frequency": "Monthly",
"Amount": 10
},
{
"ApplicantId": 1,
"ExpenseType": "DryCleaning",
"Frequency": "Monthly",
"Amount": 10
},
{
"ApplicantId": 1,
"ExpenseType": "AlcoholTobacco",
"Frequency": "Monthly",
"Amount": 10
},
{
"ApplicantId": 1,
"ExpenseType": "CinemaConcertsMemberships",
"Frequency": "Monthly",
"Amount": 10
},
{
"ApplicantId": 1,
"ExpenseType": "GymSports",
"Frequency": "Monthly",
"Amount": 10
},
{
"ApplicantId": 1,
"ExpenseType": "OtherRecreationalAndEntertainment",
"Frequency": "Monthly",
"Amount": 10
},
{
"ApplicantId": 1,
"ExpenseType": "Pets",
"Frequency": "Monthly",
"Amount": 10
},
{
"ApplicantId": 1,
"ExpenseType": "HomeMobilePhone",
"Frequency": "Monthly",
"Amount": 10
},
{
"ApplicantId": 1,
"ExpenseType": "InternetPayTVAndMediaStreamingSubscriptions",
"Frequency": "Monthly",
"Amount": 10
},
{
"ApplicantId": 1,
"ExpenseType": "PublicTransport",
"Frequency": "Monthly",
"Amount": 10
},
{
"ApplicantId": 1,
"ExpenseType": "Registration",
"Frequency": "Monthly",
"Amount": 10
},
{
"ApplicantId": 1,
"ExpenseType": "TaxiRideSharing",
"Frequency": "Monthly",
"Amount": 10
},
{
"ApplicantId": 1,
"ExpenseType": "TollsParking",
"Frequency": "Monthly",
"Amount": 10
},
{
"ApplicantId": 1,
"ExpenseType": "Kiwisaver",
"Frequency": "Monthly",
"Amount": 10
},
{
"ApplicantId": 1,
"ExpenseType": "RegularDonations",
"Frequency": "Monthly",
"Amount": 10
},
{
"ApplicantId": 1,
"ExpenseType": "VoluntarySaving",
"Frequency": "Monthly",
"Amount": 10
},
{
"ApplicantId": 1,
"ExpenseType": "VoluntarySuper",
"Frequency": "Monthly",
"Amount": 10
}
],
"Income": [
{
"ApplicantId": 1,
"Frequency": "Yearly",
"Amount": 50000,
"AmountType": "Gross",
"IncomeType": "SalaryWages",
"Attributes": []
},
{
"ApplicantId": 1,
"Frequency": "Yearly",
"Amount": 5000,
"AmountType": "Gross",
"IncomeType": "RentalIncome",
"Attributes": [
{
"name": "PropertyBuildDate",
"value": "2018-11-06"
},
{
"name": "PropertyCountry",
"value": "NZ"
},
{
"name": "IsTaxExempt",
"value": true
},
{
"name": "SalePurchaseDate",
"value": "2019-11-11"
}
]
},
{
"ApplicantId": 2,
"Frequency": "Yearly",
"Amount": 40000,
"AmountType": "Gross",
"IncomeType": "SalaryWages",
"Attributes": []
},
{
"ApplicantId": 2,
"Frequency": "Yearly",
"Amount": 5000,
"AmountType": "Gross",
"IncomeType": "WorkAllowance",
"Attributes": []
},
{
"ApplicantId": 1,
"Frequency": "Yearly",
"Amount": 10000,
"AmountType": "Gross",
"IncomeType": "Bonus",
"Attributes": []
},
{
"ApplicantId": 1,
"Frequency": "Yearly",
"Amount": 4000,
"AmountType": "Gross",
"IncomeType": "BoarderIncome",
"Attributes": [
{
"name": "BoarderIncomeType",
"value": "AllInclusive"
}
]
},
{
"ApplicantId": 1,
"Frequency": "Yearly",
"Amount": 3000,
"AmountType": "Gross",
"IncomeType": "CarAllowance",
"Attributes": []
},
{
"ApplicantId": 1,
"Frequency": "Yearly",
"Amount": 5000,
"AmountType": "Gross",
"IncomeType": "FamilyAllowance",
"Attributes": []
}
],
"Liability": [
{
"ApplicantId": 1,
"LiabilityType": "HomeLoan",
"RepaymentAmount": 2000,
"RepaymentFrequency": "Monthly",
"Limit": 4000,
"Balance": 10000,
"InterestRate": 0.02,
"RepaymentType": "PrincipalInterest",
"StartDate": "2017-11-15",
"TotalTermMonths": 228,
"InterestOnlyTermMonths": 228,
"Lender": "Kiwibank",
"IsRevolvingCredit": true
},
{
"ApplicantId": 1,
"LiabilityType": "CreditCard",
"RepaymentAmount": null,
"RepaymentFrequency": null,
"Limit": 30000,
"Balance": null,
"InterestRate": null,
"RepaymentType": null,
"StartDate": null,
"TotalTermMonths": null,
"InterestOnlyTermMonths": null,
"Lender": null,
"IsRevolvingCredit": null
},
{
"ApplicantId": 1,
"LiabilityType": "PersonalLoan",
"RepaymentAmount": 2000,
"RepaymentFrequency": "Monthly",
"Limit": 4000,
"Balance": 30000,
"InterestRate": 0.02,
"RepaymentType": null,
"StartDate": "2019-11-07",
"TotalTermMonths": 220,
"InterestOnlyTermMonths": null,
"Lender": null,
"IsRevolvingCredit": true
},
{
"ApplicantId": 1,
"LiabilityType": "Other",
"RepaymentAmount": 200,
"RepaymentFrequency": "Monthly",
"Limit": 4000,
"Balance": 10000,
"InterestRate": 0.01,
"RepaymentType": null,
"StartDate": "2018-11-07",
"TotalTermMonths": 183,
"InterestOnlyTermMonths": null,
"Lender": "Kiwibank",
"IsRevolvingCredit": true
},
{
"ApplicantId": 1,
"LiabilityType": "HirePurchase",
"RepaymentAmount": 2000,
"RepaymentFrequency": "Monthly",
"Limit": null,
"Balance": 20000,
"InterestRate": null,
"RepaymentType": null,
"StartDate": null,
"TotalTermMonths": null,
"InterestOnlyTermMonths": null,
"Lender": null,
"IsRevolvingCredit": null
},
{
"ApplicantId": 1,
"LiabilityType": "Overdraft",
"RepaymentAmount": 2000,
"RepaymentFrequency": "Monthly",
"Limit": 4000,
"Balance": 20000,
"InterestRate": 0.02,
"RepaymentType": null,
"StartDate": null,
"TotalTermMonths": null,
"InterestOnlyTermMonths": null,
"Lender": null,
"IsRevolvingCredit": null
},
{
"LoanId": 2,
"Lender": null,
"Balance": 195000,
"Limit": 250000,
"InterestRate": 1,
"RepaymentAmount": 15000,
"RepaymentFrequency": "Monthly",
"RepaymentType": null,
"TotalTermMonths": 183,
"StartDate": null,
"IsRevolvingCredit": null,
"InterestOnlyTermMonths": 216,
"ApplicantId": 1,
"LiabilityType": "HomeLoan"
},
{
"Lender": null,
"Balance": 200000,
"Limit": 260000,
"InterestRate": 2,
"RepaymentAmount": 10000,
"RepaymentFrequency": "Monthly",
"RepaymentType": "PrincipalInterest",
"TotalTermMonths": 180,
"StartDate": null,
"IsRevolvingCredit": null,
"InterestOnlyTermMonths": 216,
"ApplicantId": 1,
"LiabilityType": "HomeLoan",
"LoanId": 3
}
],
"NumberOfDependents": 1,
"NumberOfVehicles": 1
}
]
},
"Lenders": []
}
Validation
The API performs basic validation on the structure of the request payload but does not impose strict rules based on what is required for generating a calculation. This means that a successfully created session does not guarantee the data is complete for actual calculation in the UI. Data is loaded on a best-effort basis in the UI and the user is required to address any missing items, as needed.
Response
Success
If the Create Session completes successfully:
JSON Body
{
"$schema": "http://json-schema.org/draft-04/schema#",
"title": "Response JSON Body",
"type": "object",
"properties": {
"SessionID": {
"type": "string",
"description": "20 characters in length, random generated alphanumeric string, mixed case",
"example": "BYWSw2DTUBuHVMW4ZdhK"
},
"SessionURL": {
"type": "string",
"description": "Fully constructed URL to load up the session in the matching environment MRE UI.",
"example": "https://mre.test.blackfin.tools/?session_id=BYWSw2DTUBuHVMW4ZdhK"
}
}
}Examples
200: Success
Success Response
{
"SessionID": "BYWSw2DTUBuHVMW4ZdhK",
"SessionURL": "https://mre.test.blackfin.tools/?session_id=BYWSw2DTUBuHVMW4ZdhK"
}Error
If errors are encountered during the Create Session operation:
JSON Body
{
"$schema": "http://json-schema.org/draft-04/schema#",
"type": "object",
"properties": {
"error": {
"type": "object",
"description": "Error information",
"properties": {
"message": {
"type": "string",
"description": "Human readable error message"
},
"status": {
"type": "string",
"description": "Error code in uppercase letters and _ as space",
"enum": ["INVALID_ARGUMENT","DEADLINE_EXCEEDED","NOT_FOUND","ALREADY_EXISTS","PERMISSION_DENIED","RESOURCE_EXHAUSTED","FAILED_PRECONDITION","ABORTED","OUT_OF_RANGE","UNIMPLEMENTED","INTERNAL","UNAVAILABLE","DATA_LOSS","UNAUTHENTICATED"]
},
"details": {
"type": "object",
"description": "Additional error details",
"properties": {
"validation_errors": {
"type": "array",
"description": "Errors thrown when validating input data",
"items": {
"type": "object",
"properties": {
"path": {
"type": "array",
"description": "An array of property keys or array offsets, indicating where inside objects or arrays the instance was found.",
"items": {
"type": "string"
}
},
"property": {
"type": "string",
"description": "Describes the property path. Starts with `instance`, and is delimited with a dot (.)."
},
"message": {
"type": "string",
"description": "A human-readable message for debugging use. Provided in English and subject to change."
},
"schema": {
"type": "object",
"description": "The schema containing the keyword that failed",
"properties": {
"type": {
"type": "string"
},
"description": {
"type": "string"
}
},
"required": ["type"]
},
"instance": {
"description": "The instance (value) that failed",
"type": ["null", "object"]
},
"name": {
"type": "string",
"description": "The keyword within the schema that failed."
},
"argument": {
"type": "array",
"description": "Provides information about the keyword that failed.",
"items": {
"type": "string"
}
},
"stack": {
"type": "string"
}
}
}
}
}
}
}
}
},
"required": ["path", "property", "message", "schema", "instance", "name", "argument", "stack"]
}Examples
401: Missing API Key
Missing API Key
{
"error": {
"message": "Missing API Key",
"status": "UNAUTHENTICATED"
}
}
401: Invalid API Key
Invalid API Key
{
"error": {
"message": "Invalid API Key",
"status": "UNAUTHENTICATED"
}
}
400: Invalid data
Invalid data
{
"error": {
"message": "Invalid data",
"status": "INVALID_ARGUMENT",
"details": {
"validation_errors": [
{
"path": [
"Details",
"Loan",
0,
"LoanType"
],
"property": "instance.Details.Loan[0].LoanType",
"message": "is not one of enum values: Existing,Proposed",
"schema": {
"type": "string",
"description": "Defines whether the applicant already has this loan or if it's a new loan",
"enum": [
"Existing",
"New"
]
},
"instance": "Proposed",
"name": "enum",
"argument": [
"Existing",
"Proposed"
],
"stack": "instance.Details.Loan[0].LoanType is not one of enum values: Existing,Proposed"
}
]
}
}
}
Invalid data: Invalid LoanId on Liability
Thrown when loan id specified on liability does not match a loan.
{
"error": {
"message": "Invalid data: Invalid LoanId specified on Liability",
"status": "INVALID_ARGUMENT",
"details": {
}
}
}