"Free APIs and services without commercial fees" matching MCP servers:

Enables searching and retrieving Korean commercial registration precedents (617 cases) from the Supreme Court's portal for legal practice.

Enables checking whether a given US patent is still in force or has lapsed, by returning every recorded USPTO fee event, a computed status, and 4th/8th/12th-year fee-window details. Also supports counting and sampling fee events such as expirations for non-payment across a date range or patent-number prefix.

MCP server providing official US economic data including CPI inflation, famous prices, national debt, and Treasury interest rates. Enables AI agents to query historical and latest economic statistics via natural language.

Enables Claude to discover and invoke Brazilian government APIs (public, Serpro, and Conecta gov.br) through a catalog-driven gateway that searches a YAML catalog of 116 APIs, loads OpenAPI specs on demand, and calls endpoints with credentials resolved per entry. It provides five generic tools for search, listing, describing, calling, and checking credential readiness, keeping client context small instead of exposing one tool per endpoint.

Enables AI assistants to search, read, and cite Title 38 of the Code of Federal Regulations from a locally built SQLite full-text index, using read-only tools for ranked regulation search, full section retrieval, hierarchy browsing, part listing, and index freshness/health checks. All queries run offline against the local index, returning ranked hits with citations, snippets, cross-references, and staleness notices.

Enables querying eight keyless French and international public APIs for addresses, communes, holidays, school calendars, BODACC announcements, European VAT, and exchange rates through read-only MCP tools.

MCP server exposing all major Swiss official public APIs as native tools for any MCP-compatible AI agent.

Enables comprehensive search and browsing of Berlin city services. Also supports PDF form discovery, analysis, and filling with resilient caching.

Enables querying live Sonoma County animal shelter intake and outcome records, including recent intakes, animal lookup by id/name/breed, and outcome summaries.

Enables AI agents to search and retrieve Israel's social services data, including service details, taxonomy, and location-based queries.

Provides MCP tools to query live Austin Animal Center intake and outcome records, including recent intakes, animal lookup by ID/name/breed, and outcome summaries by type, animal type, or month.

Enables keyless, read-only access to a wide range of public APIs (including weather, elevation, Japanese addresses, environment, science, and civic data) through MCP clients, with usage limits and abuse protection built in.

Enables trademark clearance and research across EU and Benelux registers, plus company, group-structure, and EU VAT lookups, all through free public sources without API keys.

Facilitates retrieval of National Park Services data using the NPS API, allowing users to list national parks by state and access detailed information about specific parks.

Torify gives AI agents the Japanese locale primitives that standard libraries lack — imperial era date conversion (wareki), qualified invoice number validation with NTA registry lookup, corporate number lookup (法人番号), postal code resolution, name romanization (Hepburn), and kanji-to-kana conversion via Yahoo! JLP. 31 endpoints total. No authentication required for MCP. Pay-per-call $0.02/call via

MCP server for OFAC SDN sanctions screening. Check names against US Treasury sanctions lists with automatic cache refresh. No API key needed for the check itself.

Enables users to discover matching public procurement notices from four official portals, with filters by keywords, CPV prefixes, and buyer country. Returns structured notice rows including buyer, deadline, value, codes, and link.

One-call Australian health and welfare data plumbing via AIHW — cited responses for practical analysis, not a data broker.

Enables AI assistants to validate and standardize US addresses using the official USPS Address Validation API with secure OAuth2 authentication.

Enables MCP clients to search verified Japanese corporate records — EDINET XBRL financials, 13-digit corporate numbers, major shareholders, and gBizINFO certifications — locally through a single knowledge-search tool with keyword, fuzzy, semantic, or hybrid retrieval. It also maps J-GAAP, US GAAP, and IFRS concepts so filings can be read in English without mistranslating terms like 営業利益 and 経常利益.

Enables querying of Hong Kong government data on elderly community care services, such as waiting times and applicant counts.

A server for querying, practicing, and analyzing exam questions from Taiwan's national examinations, offering 20 tools including search, statute lookup, weak topic review, and readiness assessment.

MCP server for answering questions about official statistics from a single publication URL, with tools to check query scope, retrieve overview, text, data files, and search.

Provides access to Hong Kong climate and weather data from the Hong Kong Observatory, including current conditions, forecasts, warnings, tides, and more.

Enables discovery and querying of UK public data for infrastructure, geology, and preliminary ground investigations, including boreholes, environmental monitoring, planning, mapping, and traffic, plus cited desk studies and ground-investigation gap planning.

Query normalized U.S. House and Senate STOCK Act disclosures, member trading histories, and aggregate trading statistics through MCP.

Enables querying Swiss company data from official public sources: commercial register, UID register, and Swiss Official Gazette of Commerce, with per-company lookups and request budgets.

Provides access to the Swiss Federal Commercial Register (Zefix) for company search, verification, and reference data, enabling natural language queries for public administration use cases.

Provides real-time Seoul city data including population congestion, traffic, parking, transit, bikes, EV chargers, weather, events, commercial, accidents, alerts, and news across 121 locations using Seoul Open Data API.

Provides aggregated municipal development costs for US jurisdictions, including impact fees and utility connection charges, enabling AI agents to assess building feasibility quickly.