"An open-source relational database management system" matching MCP connectors:

Read-only breach intel, full history 2007-today: reports THAT an org was breached, never the data.

Measured share of answer for 24 crypto and Web3 brands. An open dataset, not an audit of your site.

Measured share of answer for 20 SaaS brands. An open dataset, not an audit of your site.

Open AI Visibility Index for crypto and Web3. Weekly share-of-answer measurements for 24 tracked brands across ChatGPT, Perplexity and Gemini, from a frozen versioned prompt panel. Five read-only tools: full index, per-brand lookup, brand list, complete measurement history and methodology. No auth, no API key. Data is CC BY 4.0 with a permanent archive of every weekly snapshot, so any figure can be verified independently.

Open AI Visibility Index for SaaS and AI tools. Weekly share-of-answer measurements for 20 tracked brands across ChatGPT, Perplexity and Gemini, from a frozen versioned prompt panel. Five read-only tools: full index, per-brand lookup, brand list, complete measurement history and methodology. No auth, no API key. Data is CC BY 4.0 with a permanent archive of every weekly snapshot, so any figure can be verified independently.

MCP server for Brazilian Federal Senate open data (legislative, administrative, e-Cidadania).

An MCP server that audits the fairness of construction and renovation estimates in Japan. Provides fair-price ranges, overcharge detection, and verifiable unit-cost data based on JCCDB (65,729 items, DOI-backed).

Search 31,000+ open US grants, federal contracts, and foundations. Checked daily, free tier.

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

Open manufacturing and maker facility locations for country and facility-type queries.

Taiwan Stock Exchange (TWSE) open data as MCP tools: stock quotes, ETF data, 140+ public datasets.

Catch AI-fabricated citations (real DOI + fake title). Retraction, open-access, 10,000+ CSL styles.

Dutch address dossier, vehicle, building, elevation, holidays, demographics. Free samples first.

Resolve any government entity worldwide and submit service requests. Open civic data for AI agents.

Sourced carbon emission factors + audit-traced calculations an AI can cite.

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

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

Source-anchored search and civic intelligence for Dutch municipal council records.

Lithuanian company due diligence and KYC identification, attested by an attorney-at-law.

Live US savings, CD, mortgage & HELOC rates with source + timestamp on every figure.