{"domain":"zip-codes.com","status":"valid","tier":"listed","authority":54,"verified":false,"title":"ZIP Codes API","summary":"Location intelligence for the US and Canada: postal lookups, every geographic overlap a ZIP Code has (counties, places, tracts, districts, school districts, with shares), a normalized 14-year ACS demographic series, spatial radius search and US address matching to ZIP+4. ZIP boundaries are carrier-route derived and refreshed quarterly, not Census ZCTAs. Free accounts: 2,500 credits/day, 60 requests/minute. Base URL https://api.zip-codes.com; authenticate with the X-Api-Key header (?key= also wor","llms_txt":"https://www.zip-codes.com/llms.txt","llms_full_txt":"https://www.zip-codes.com/llms-full.txt","last_checked":"2026-10-18T21:22:21.619Z","agent_terms":null,"categories":[],"capabilities":[]}