OpenChainGraph Suite · ART-335 · US Mortgage Compliance

DTI Ratio Calculator

Front-end (housing) and back-end (total) debt-to-income ratios per Fannie Mae Selling Guide B3-6-02 and Freddie Mac Single-Family Seller/Servicer Guide 5401.2. Classifies the back-end ratio into a standard / extended-compensating-factors / AUS-only / exceeds-max tier and checks it against the max DTI for the selected underwriting type. Feeds ART-222 Agency Eligibility Matrix.

Fannie Mae B3-6-02 Freddie Mac 5401.2 Front-End / Back-End DU · LPA · Manual
🔒 All inputs are processed locally in your browser. No data is transmitted. Do not enter real personal data — use synthetic or anonymised inputs only.
Income & Payments
Principal, interest, taxes, insurance, and association dues.
Qualifying installment/revolving debt, alimony, child support.
Underwriting
Ratio Detail
Execution Hash (SHA-256)

Ask your agent

Copy this paragraph into Claude, OpenClaw, or any MCP-aware agent to run this exact tool, with this sample, and verify the artifact.

Run the AINumbers MCP tool `compute_dti_ratios`. Task: Front-end (housing) and back-end (total) debt-to-income ratios per Fannie Mae Selling Guide B3-6-02 and Freddie Mac Single-Family Seller/Servicer Guide 5401.2.
Call it with arguments: {"policy_parameters":{"gross_monthly_income":8000,"housing_payment_pitia":1800,"other_monthly_debts":600,"underwriting_type":"du"}}
Verify before trusting: call `verify_execution_hash` on mcp.ainumbers.co (https://mcp.ainumbers.co/mcp) with the parameter `claimed_hash` set to the returned `execution_hash`, passing the full artifact the run returned (the object containing `policy_parameters` + `output_payload` + `execution_hash`; equivalently `policy_parameters` + `output_payload` with `claimed_hash`), not the bare hash string.
Return the ledger link https://ledger.ainumbers.co/ so a human can re-verify without contacting us.
PII rule: All inputs are processed locally in your browser. No data is transmitted. Do not enter real personal data — use synthetic or anonymised inputs only.
Open the tool with the sample prefilled: https://ainumbers.co/chaingraph/art-335-compute-dti-ratios.html#p=v1.H4sIAAAAAAAA_wFtAJL_eyJncm9zc19tb250aGx5X2luY29tZSI6ODAwMCwiaG91c2luZ19wYXltZW50X3BpdGlhIjoxODAwLCJvdGhlcl9tb250aGx5X2RlYnRzIjo2MDAsInVuZGVyd3JpdGluZ190eXBlIjoiZHUifSVQU2htAAAA