"QA review sentinel test marker" matching MCP connectors:

Taiwan stock market data (TWMD): official-source, point-in-time-safe datasets via read-only tools.

Moderated usability testing: read sessions, notes, transcripts, reports, and draft test scenarios.

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

Verified reference data; each record carries its source URL and quote. verify_quote checks claims.

Aggregate official drug-market evidence, cited analyses, and explicit claim boundaries.

Leadership-ratio benchmark, partnership ROI builder, community-launch readiness test. ELC data.

Read-only access to the Islam West Africa Collection via Hugging Face datasets.

Run AI market research: synthetic customer panels for concept testing, message testing, segments.

Source-backed US market signals: insider filings, Congress trades, institutions, consensus.

连板网A股复盘数据: 连板天梯/题材/情绪周期/龙虎榜游资/个股涨停史 (A-share daily review, free read-only)

market-spread MCP — cross-venue prediction-market landscape scanner.

Search and commission verified human research review through funded Research Bounties.

Russian construction market: 3,395 contractors, 20,322 projects, 24 search/analytics tools.

Probability prose is AI-written, with the tells behind the score. No API key — text or URL in.

AI visibility + fact-checks (ChatGPT/Perplexity), review gaps & competitor scans, local SEO.

4,764 products, 626 categories: sourced prices, dated price history, independent-test coverage.

Find polygraph (lie detector) offices, pricing and service info across the US, Canada and the UK.

Bitcoin-anchored sealed-forecast record: search, grades, calibration, luck test. Read-only, no key.

Free educational MCP for read-only eDiscovery news and TAR/review calculators.

A-share HS300 phase signals via Landau-Ginzburg framework. No auth required.