"Giving Claude full access to SQL Server for free" matching MCP servers:

C# SQL Agent MCP server featuring raw SQL input, strict AST validation, and an embedded Admin UI. Eliminates LLM hallucinations and security risks across 6 major databases.

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.

Provides AI assistants with specialized tools to interact with NIST's Open Security Controls Assessment Language (OSCAL) framework. It enables agents to retrieve schemas, explore models, and generate valid OSCAL documentation for security compliance automation.

The open Congress.gov MCP server. Provides comprehensive access to the Congress.gov API through 6 organized toolsets, enabling AI systems to retrieve and interact with legislative data from the United States Congress with a clean, unified interface.

MCP server that silently monitors state changes in structured data sources (e.g., government open data) and provides a pull-based channel for AI agents to retrieve real mutations since their last cursor.

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.

Enables ticker-to-CIK resolution for SEC EDGAR, allowing users to query US stock tickers and retrieve their SEC Central Index Key.

A Python FastMCP server that re-exposes Kindora's public funder and grant tools for ChatGPT, enabling grant discovery from IRS 990 filings and Grants.gov.

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 users to search and query information about military service alternative companies in South Korea through the Military Manpower Administration (MMA) API. Supports filtering by service type, industry, company size, location, and recruitment status.

Enables searching government awards through the Sell to State API by proxying JSON-RPC to the live HTTP MCP endpoint, requiring an API key.

Enables querying SINTEGRA TO (state tax information) through a read-only MCP server, using natural language.

Exposes Denmark's Statistical Bureau API as programmable resources, making it easy to integrate with language models and modern AI applications to enable natural language queries for statistical data.

MCP server for consulting vehicle data from DETRAN TO official source. Read-only, pay-per-use, works with any MCP-compatible client.

Enables natural language access to Denmark's Statistics API (Danmarks Statistik), allowing users to query and analyze Danish statistical data without coding knowledge through AI-powered interactions.

Enables users to query IPVA (vehicle property tax) data from the official SEFAZ TO source via a read-only MCP tool.

Enables AI assistants to query the official DETRAN TO source for CRLV printing via a read-only, hosted MCP server with pay-per-query prepaid credit.

Read-only MCP server for querying SEFAZ Tocantins (SEFAZ TO) NFC-e (electronic consumer invoice) data from official government sources via natural language, working with any MCP-compatible client such as Claude, Cursor, VS Code, and more.

MCP server for GLEIF LEI (Legal Entity Identifier) database access. Look up, validate, and search legal entities and their relationships in the global LEI system.

Enables querying of a locally pinned snapshot of the Education-to-Workforce Indicator Framework — 99 indicators and 11.8M observations — to browse questions, describe metrics, resolve places, and fetch or rank data across national, state, county, and district levels.