Data reference

These read-only endpoints publish the same facts as the HTML pages, as of 2 Oct 2026. Null means the source did not state the field. There is no API key. Source: Fact Lot, observed 2 Oct 2026.

• OpenAPI 3.1 document
• Search — parameters market, zip, use, q and limit (1 to 50, default 20). The JSON fields matched and limit are the count before the slice and the cap that was applied. The MCP tool search_facts calls the same filter with query in place of q and returns those two fields.
• Stats
• Citations
• Tool catalog
• Scoreboard
• Greater Houston JSON and CSV
• San Antonio JSON and CSV

GET requests allow any origin. The corrections form is the only submission Fact Lot stores. MCP is read-only. Rate limits use the connecting IP, and on IPv6 the /64 prefix.