"Free PostgreSQL Database Solutions" matching MCP servers:

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.

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.

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

Provides tools for verifying crypto price events and building permit intelligence, with free and paid tools using the x402 protocol.

Open-source MCP server for Chile's SII free invoicing system, enabling AI agents to query issued and received tax documents.

Enables AI agents to query the IRS 990 nonprofit database and OpenRegs federal regulations database via SQL, providing access to nonprofit filings, grants, lobbying, and congressional data.

UK public procurement data for AI agents. Tenders, contracts, buyer and supplier profiles over MCP and REST. 250 free credits.

Wraps EPA ECHO Web Services (free, no auth) to enable querying environmental data via natural language.

Enables read-only queries against the official Paraná regional nursing council registration database through a prepaid, platform-hosted MCP server.

Access data on every NIH-funded research project. Free and no authentication required.

Enables access to EPA AirNow real-time AQI and forecast data for US locations through a single tool, with a free API key.

Enables querying Statistics Sweden's statistical database via tools like navigate, get_table_metadata, query_table, etc.

Free Polish VAT invoice generation MCP server with PDF output and preview. No API key required.

MCP server for querying the CADIN (debt registration) database from SEFAZ MG, providing read-only access to official data via natural language.

Enables lookup of Singapore companies by UEN or name using ACRA's free open data from data.gov.sg, with tools for UEN validation, exact lookup, and free-text search.

Enables querying the National Science Foundation award database without authentication.

Enables finding upcoming events in Helsinki, Finland, with filters for keyword, free admission, and date window, returning venue, coordinates, and tags.

26 US federal data domains as 23 MCP tools. Ed25519 signed responses. Free, no API key.

Enables users to query a Brazilian telecom regulator's official database to verify the legal status of mobile devices, with read-only access and prepaid pay-per-query usage.