"Supabase (open source Firebase alternative)" matching MCP connectors:

Capture a web source, or seal a hash you hold, into a signed receipt anyone can verify offline.

Verify scraped data against the live source page. Signed verdicts, $0.01 via x402.

Verify public marketplace, retail, classified, and auction listings before an agent relies on them; return source-supported facts or explicit safe-failure states.

Web and MCP change memory with native diff UI; later calls return only what changed.

Does a cited URL exist, and does the source name what your claim names? Two answers.

Verify citations in AI text: fetches each cited source, returns verdicts with evidence quotes.

Open retro-gaming metadata catalog — 91,000 games, 99 systems. Box art, manuals, screenshots, gameplay previews. Free MCP + REST API.

Scan any website for SEO, performance, accessibility, and AI search issues. Returns structured issues with fix prompts you can paste into Claude or Cursor to fix immediately. 40+ checks including Core Web Vitals, Open Graph, structured data, and AI search visibility.

AI agent gateway with web fetching, data extraction, crypto pricing, and x402 payments

Search open SVG icon packs and fetch exact SVG markup from coding agents through MCP.

Scrape, crawl, map & search the web. Open-source, self-hostable Rust crawler & search for AI agents.

Turns any URL into SEO/OpenGraph metadata, public contact signals, tech-stack fingerprinting, Schema.org product data, a security-headers audit, and clean AI-ready Markdown, in one call. Anti-SSRF hardened (DNS pinned post-resolution, private/loopback/cloud-metadata ranges blocked). Hosted via RapidAPI's MCP gateway - free tier, 500 requests/month, no credit card. Source: https://github.com/JosejuX/rapidapi-metadata-extractor

Market research and competitive intelligence for startup ideas - every finding source-linked.

Scrape Open Library book editions, authors, subjects and identifiers. Pay per row.

Source-first URL clone, capture, rebuild, and fidelity verification tools.

Query the Virohana website with your AI: services, products, journal. Open, read-only.

Real-time US state ABC liquor license compliance records for AI agents. Covers CA, TX, NY, and FL — extracted from state portals and served as normalized JSON. Every response includes a _verifiability block with extraction timestamp, confidence score, and source URL.

Detect 7,500+ technologies on any website - CMS, ecommerce, analytics, frameworks - using open-source webappanalyzer fingerprints. Bulk input, pay-per-use (~$5 per 1,000 sites), billed through your Apify account.

Free URL metadata extraction API. Extract titles, descriptions, Open Graph tags, and favicons from any URL. No API keys required.

Rich Link Previews with One API Call Extract Open Graph, Twitter Cards, favicons, JSON-LD, and structured metadata from any URL. Power beautiful link previews in your app in minutes, not days.