TODO_TAGS_REVIEW
TODO_AP2_EXPORT_REVIEW

LLPA Stack Calculator

Fannie Mae public LLPA (Loan-Level Price Adjustment) matrix calculator. FICO-by-LTV base grid plus feature surcharges: cash-out refinance, second home, investment property, warrantable condo, subordinate financing. Applies FTHB AMI waiver (SEL-2023-07, up to 1.75 pp reduction for first-time buyers at or below 100% AMI). Table version: FNM-LLPA-2025-11-01 (Fannie Mae public publication). Not check_agency_eligibility_matrix (DU/LPA approval grid) or check_conforming_loan_limit (FHFA size limits).

Tool URL: https://ainumbers.co/chaingraph/art-221-llpa-stack.html

post/v1/tools/compute_llpa_stack

Request

  • Base URL: https://ainumbers.co
  • URL: https://ainumbers.co/v1/tools/compute_llpa_stack
  • Auth: none declared

Request body

ami_pctnumber

Percentage value

fico_scorenumber
first_time_buyerboolean required
loan_purposeunknown required
ltv_pctnumber

Percentage value

occupancy_typeunknown required
property_typeunknown required
subordinate_financingboolean required

Response

Successful tool execution result

base_llpainteger
feature_llpainteger
fico_bandstring
fthb_eligibleboolean
fthb_waiverinteger
ltv_bandstring
pii_notestring
regulatory_basisstring
table_sourcestring
table_versionstring
total_llpa_pctinteger

Changes

No recorded changes to this operation across all 1 revision of this API.