"Free PostgreSQL Database Solutions" matching MCP connectors:

Independent pre-transaction audit for construction estimates. Free, and every verdict recomputes.

One MCP endpoint over 69 public PPN APIs: search_apis to discover, execute_api to call. Free tier.

Search foods, compare nutrients, and look up the full USDA FoodData Central database.

Verified AI free-tier limits, quota comparisons, commercial-use verdicts and zero-cost workflows.

UN Sustainable Development Goal indicators for all 17 goals, curated by country and year. Free.

Free SEC filing fundamentals: financial statements, 10-K/10-Q summaries, 8-K events. No API key.

Open, verified shop database for AI agents: products, offers, price comparison, trust and coupons.

Point-in-time, survivorship-free SEC EDGAR fundamentals + smart-money signals for AI agents.

Free, keyless real-time currency conversion and exchange rates for any currency pair.

Every San Francisco movie showtime — chains, indies, repertory — verified twice daily. Free & open.

Dutch vehicle, address, building, elevation, holiday & demographics data. Free samples, then paid.

Check whether a real-world fact can be verified before an agent acts on it. Free, no auth.

Free fan-convention data for AI agents: dates, registration windows & table costs, US & Canada

Czech distressed real estate — anonymized district aggregates (k≥5). Free tier.

Hardware end-of-life dates by part number, each linked to the vendor's own bulletin.

Winning numbers for 30+ world lotteries, minutes after each draw. Free, no key, CC BY 4.0.

Brina Gap valuation, screener and market score for US-listed stocks. SEC data, free, no key.

Real-time fuel prices, active alerts (traffic, wildfires, severe weather, earthquakes), per-country data coverage, and cheapest gas stations by city, aggregated from official public sources across 38+ countries. Read-only, no auth required for the free tier.

Wikipedia, Wikidata and Wiktionary as clean JSON, not HTML. 1.9M searchable. Free, no auth.

Free public-record contractor license checks across 34 US jurisdictions (2.7M records). Tool