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Best 县查询 APIs

Website Security Certificate Checker API

Security & Cybersecurity

Inspect the security certificate of any host: issuer, subject, validity window, days remaining, expiry flags, alternative names, serial number, fingerprint, negotiated protocol and the full chain. Built for expiry monitoring and renewal alerts.

Free 7-Day Trial

100% uptime 179ms avg MCP ready

Demographics Enrichment API

Location & Mapping

Demographic Enrichment API for county and state lookup, search, and coordinate enrichment. Attribution: U.S. Census Bureau Population Estimates Program data and U.S. Census Bureau TIGER/Line county boundaries; this product is not endorsed or certified by the Census Bureau.

Free 7-Day Trial

100% uptime 191ms avg MCP ready

Global Worker Classification Intelligence API

Legal & Compliance

Accepts a structured description of a working relationship and returns a jurisdiction-specific misclassification risk score (0-100), risk level, factor-by-factor analysis, and plain-English reasoning across 20 jurisdictions. Also includes remediation guidance, safe-harbor checklists, financial exposure estimation, cross-jurisdiction comparison, and portfolio-level bulk scoring. No database, no runtime scraping — fast and deterministic responses.

Free 7-Day Trial

100% uptime 110ms avg MCP ready

Contractor License Verification API

Legal & Compliance

Verify contractor licenses from official state licensing boards across 11 US states (CA, TX, FL, NY, IL, WA, CT, OR, CO, IA, DE). Look up by license number, contractor name, or business name.

Free 7-Day Trial

100% uptime 3,626ms avg MCP ready

BPS Multi-City Compliance API

Legal & Compliance

Building Performance Standards compliance screening for 7 major US jurisdictions (NYC, Boston, Denver, Washington State, Oregon, Maryland, and Washington DC).

Free 7-Day Trial

100% uptime 503ms avg MCP ready

Estate Sale Finder API

Real Estate & Housing

Search for estate sales across the US. Find upcoming sales by city, state, or ZIP code. Get sale details including dates, addresses, photos, and descriptions from EstateSales.net.

Free 7-Day Trial

100% uptime 1,433ms avg MCP ready

Link Examiner API

Location & Mapping

Unleash the Link Examiner API to revolutionize your digital investigations. Seamlessly validate web addresses, unravel geographic intricacies, and uncover the essence of each link. From pinpointing locations to deciphering ISPs, this API empowers you to navigate the virtual landscape with precision, ensuring every link is an open book.

Free 7-Day Trial

100% uptime 607ms avg MCP ready

EU Whistleblower Directive API

Legal & Compliance

EU Whistleblower Protection Directive (2019/1937) internal-reporting-channel obligations, by employer headcount. Independent product — not affiliated with the European Commission.

Free 7-Day Trial

100% uptime MCP ready

City Lookup API

Location & Mapping

Enhance your applications with the City Lookup API, delivering real-time terrain updates and visualizations.

Free 7-Day Trial

100% uptime 22ms avg MCP ready

County API

Location & Mapping

This API provides detailed county information including location, population, demographics, time zone, FIPS codes, and postal codes for accurate regional data.

Free 7-Day Trial

100% uptime 1,364ms avg MCP ready

County Population API

Data & Analytics

This API provides detailed population statistics for US counties, including current and previous population data.

Free 7-Day Trial

100% uptime 8,405ms avg MCP ready

Litigation Risk Assessment API

Legal & Compliance

Search over 500 million U.S. federal court dockets from PACER — district courts, circuit courts, bankruptcy courts, and SCOTUS — in a single API call. Find every case where a company or person appears as a party. Get case name, court, filing date, judge, nature of suit, and cause of action. 98% cheaper than Westlaw CourtAlert at a fraction of the price.

Free 7-Day Trial

100% uptime 1,557ms avg MCP ready

Local Law 97 Compliance BPS Multi-City API

Legal & Compliance

Stay ahead of Local Law 97 regulations across multiple cities with our compliance-focused API.

Free 7-Day Trial

100% uptime MCP ready

Cross Border Hiring Compliance Global Worker Classification Intelligence API

Legal & Compliance

Score one working relationship across up to 5 jurisdictions at once, or compare jurisdictions' legal tests and penalty exposure side by side, to find the safest place to engage a role.

Free 7-Day Trial

100% uptime MCP ready

IR35 Compliance Assessment Global Worker Classification Intelligence API

Legal & Compliance

Score IR35 and off-payroll working risk for UK engagements, alongside 19 other jurisdictions' classification tests, with factor-by-factor reasoning.

Free 7-Day Trial

100% uptime MCP ready

Misclassification Risk Evaluation Global Worker Classification Intelligence API

Legal & Compliance

Score misclassification risk (0–100) across 20 jurisdictions from a structured description of a working relationship, with the legal test applied and factor-by-factor reasoning.

Free 7-Day Trial

100% uptime MCP ready

Workforce Compliance Audit Global Worker Classification Intelligence API

Legal & Compliance

Bulk-score up to 100 existing contractor relationships in one call, with per-worker risk levels and aggregate statistics to flag your highest-risk workers first.

Free 7-Day Trial

100% uptime MCP ready

Employer of Record Risk Analysis Global Worker Classification Intelligence API

Legal & Compliance

Score misclassification risk before placing a worker in any of 20 jurisdictions, with financial exposure estimates and remediation guidance for EOR and payroll teams.

Free 7-Day Trial