Worked Example — FHA Purchase

FHA purchase for a $400,000 single family home in Miami, FL. $375,000 loan / 720 credit score. FHA allows up to 96.5% LTV with a minimum 3.5% down payment.

About FHA Loans:
Requires upfront MIP of 1.75% (typically rolled into loan) and monthly MIP. For 30-year loans with LTV > 90%, MIP is permanent for the life of the loan.

Scenario Parameters

Parameter	Value
Loan Type	FHA
Home Value	$400,000
Loan Amount	$375,000
Down Payment	$25,000 (6.25%)
LTV	93.75%
Credit Score	720
ZIP Code	33130 (Miami, FL)
Property Type	Single Family Residence

Request Payload

Derives LTV automatically from list_price and loan_amount.

POST https://api.bankingbridge.com/rateflow
Content-Type: application/json
x-api-key: uL6aLuwfcq1dUvEZTq3Gv2O0KgorNbYXXXXXXXX

{
  "loid": 75,
  "loan_purpose": "purchase",
  "loan_type": "fha",
  "list_price": 400000,
  "loan_amount": 375000,
  "credit_score": 720,
  "zipcode": "33130",
  "property_type": "single_family_home"
}

cURL Example

curl -X POST "https://api.bankingbridge.com/rateflow" \
  -H "x-api-key: uL6aLuwfcq1dUvEZTq3Gv2O0KgorNbYXXXXXXXX" \
  -H "Content-Type: application/json" \
  -d '{
    "loid": 75,
    "loan_purpose": "purchase",
    "loan_type": "fha",
    "list_price": 400000,
    "loan_amount": 375000,
    "credit_score": 720,
    "zipcode": "33130",
    "property_type": "single_family_home"
  }'

JavaScript (fetch) Example

const response = await fetch("https://api.bankingbridge.com/rateflow", {
  method: "POST",
  headers: {
    "Content-Type": "application/json",
    "x-api-key": "uL6aLuwfcq1dUvEZTq3Gv2O0KgorNbYXXXXXXXX"
  },
  body: JSON.stringify({
    loid: 75,
    loan_purpose: "purchase",
    loan_type: "fha",
    list_price: 400000,
    loan_amount: 375000,
    credit_score: 720,
    zipcode: "33130",
    property_type: "single_family_home"
  })
});

Python (requests) Example

import requests
headers = {
  "Content-Type": "application/json",
  "x-api-key": "uL6aLuwfcq1dUvEZTq3Gv2O0KgorNbYXXXXXXXX"
}
data = requests.post(
  "https://api.bankingbridge.com/rateflow",
  json={
    "loid": 75,
    "loan_purpose": "purchase",
    "loan_type": "fha",
    "list_price": 400000,
    "loan_amount": 375000,
    "credit_score": 720,
    "zipcode": "33130",
    "property_type": "single_family_home"
  },
  headers=headers
).json()

Sample Response Structure

FHA responses include mip_monthly.

{
  "returncode": 0,
  "pricing_results": [
    {
      "lender_name": "Example Bank A",
      "rate": 6.875,
      "apr": 7.312,
      "points": 0.00,
      "monthly_payment": 2464.23,
      "mip_monthly": 184.63
    },
    {
      "lender_name": "Example Bank B",
      "rate": 6.750,
      "apr": 7.201,
      "points": 0.50,
      "monthly_payment": 2432.10,
      "mip_monthly": 184.63
    }
  ]
}

FHA MIP Notes:

• Upfront MIP: 1.75% of loan amount (~$6,562 on $375,000), typically rolled in.
• Annual MIP: 0.55% for 30-yr LTV >90% ÷ 12 (~$171–$185/month).
• MIP is permanent for 30-yr loans with LTV > 90%.