Free REST API and streamable HTTP MCP server for mortgage calculations, affordability, refinancing, debt-to-income, loan programs, closing costs, and 50-state property tax data. No authentication required.
Prices and medians update for the tier you select.
Agents cost 0.9× MCP servers at the Pro tier.
Ranked by how closely each one matches US Mortgage Calculator API & MCP Server's job. Prices show each provider's Pro state; entry prices are labelled as such. Unpriced products still belong to the market.
Market = the products most similar to this one by capability; prices are median / quartiles over its priced members, separated by provider type and buyer tier.