"Free PostgreSQL Database Solutions" matching MCP connectors:

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

Free real-estate underwriting, no key or account. 6 strategies, stress tests, max offer.

See what actually settles on x402: wash-adjusted volume, payTo checks. Free, no key, no signup.

Tesouro em Foco is a free remote MCP server that brings Brazilian government bond (Tesouro Direto) pricing into AI assistants such as Claude, Cursor, and any MCP-compatible client. The engine implements the Brazilian National Treasury's official pricing methodology — validated against 269,000+ real trades — and covers all retail bond types: fixed-rate (LTN, NTN-F), inflation-linked (NTN-B Principal, NTN-B), and retirement/education bonds (Renda+ and Educa+, NTN-B1).

LuxAlgo Library — the encyclopedia of trading & technical analysis for AI agents. Free, keyless.

Live crypto data: funding rates, funding arbitrage, OI pressure, Fear & Greed. Free, no API key.

Deep purchase intelligence for agents and apps: live prices, landed cost, trust scores. Free.

Stock market trading signals: regime, ranked buy list, stock + sector reads. Free tier + x402 live.

Real-time financial intelligence MCP server for crypto public companies. Provides covenant stress analysis, alpha signals, peer ranking, risk distribution, SEC XBRL fundamentals, and daily changes. x402 micropayments on Base USDC. First 5 calls free.

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

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

MiCA compliance evidence, stablecoin risk scoring (105+ tokens), macroeconomic regime detection (86 FRED series), and AI agent governance. 79 tools across 5 MCP servers. Every response ECDSA-signed, blockchain-anchored, audit-ready. Free tier, no API key needed. Works with Claude Managed Agents.

Free MCP: typed MELANY ratings for any US stock or ETF (11,000+) plus mortgage-rate context.

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

Four market-statistics tools + a free qd_ key by email: 1 anonymous look, then 10 calls/UTC day.

Check any Base wallet before you pay it. Free, no signup, no account needed.

62 x402-paid web, document, research, developer, data, and EVM tools on Base, plus free workflows.

Free fundamental stock & ETF analysis: 10-point score, verdict and key metrics for any ticker.

Free US cleaning cost, time, crew, and chemical-use calculators with visual reports.

Free KZ agent utilities (Kazpost tracking, IIN/BIN, IBAN, LEI, FX) + governed API marketplace.