{"asm_version": "0.3", "service_id": "us-census/data-api@current", "taxonomy": "tool.data.real_estate", "display_name": "US Census Bureau Data API", "capabilities": {"description": "Free US demographic, economic and housing statistics API.", "functions": ["real_estate_data", "demographics", "housing_stats", "geography"]}, "invocation": {"interface": "rest_api", "reach": "cloud", "agent_operable": true, "auth_to_invoke": "none", "agent_completable_setup": true, "setup_requires": [], "platforms": ["web"], "docs_url": "https://www.census.gov/data/developers.html"}, "pricing": {"billing_dimensions": [{"dimension": "request", "unit": "per_1", "cost_per_unit": 0, "currency": "USD"}]}, "payment": {"methods": ["free_tier"], "auth_type": "none"}, "usage_terms": {"automation_allowed": "yes", "license": "US Government public data"}, "operational_constraints": {"risk_class": "low", "side_effects": ["external_api_call", "network_access", "read_only"], "approval": {"required": "never"}}, "data_governance": {"data_owner": "user", "exportable": true, "trains_on_user_data": "no", "lock_in_notes": "Public-domain government data."}, "provenance": {"source_url": "https://www.census.gov/data/developers.html", "retrieved_at": "2026-06-09T00:00:00Z", "last_verified_at": "2026-06-09T00:00:00Z", "verification_status": "self_reported", "notes": "Verified 2026-06: works keyless for low volume (immediately usable); a free API key lifts rate limits but is optional. agent_completable_setup=true."}}