"Free PostgreSQL Database Solutions" matching MCP connectors:

500+ pay-per-call tools + skill packs. USDC + USDG on 12 chains, or free via proof-of-work.

Pay-per-call web scraping for AI agents — no signup, no API keys, just USDC micropayments via the x402 protocol on Base. Six tools: scrape webpages, extract structured data, capture screenshots, parse metadata, manage browser sessions, and run workflows. Runs on Cloudflare Workers with Browser Rendering. Free tier: 10 calls per wallet per 30 days.

Web tools for agents: fetch URL as markdown (free MCP) + x402 scrape, links, AI JSON, snapshot.

Free remote MCP server for fetching public web pages through a rotating proxy pool.

Microlink MCP — wraps Microlink API (free tier, no auth required)

Clean web reader for AI agents. Free remote read tier, optional x402 pay-per-call. No API keys.

Free SEO, GEO, and AEO audits: analyze any page or domain, AI-crawler access, agent readiness.

Website intelligence audits for AI agents: free preview plus x402-paid Agent Readiness scoring

8 pay-per-call web intelligence tools for AI agents: detect a site's tech stack and track stack changes, check domain health, extract structured data or clean markdown from any URL, turn sitemaps into knowledge bases, analyze Shopify and Zid stores. Free discovery + pricing_info; paid calls $0.01-0.02 in USDC on Base via x402 — pay only for successful runs.

Free public web freshness and response-metadata checks for AI agents.

Free technical-SEO audit MCP: crawl a site, run checks, return an LLM-ready shareable report.

URL to clean markdown for LLMs: a polite, robots.txt-respecting web reader. Free, no API key

Screenshot & HTML-to-PDF rendering API for AI agents — capture any URL or raw HTML as PNG/JPEG/PDF via a managed Chromium fleet. Free tier.

Scan any website's AI readiness: AI search visibility and AI agent usability. Free, no auth.

4 web-search tiers (x402 USDC on Base) - simple/medium/deep/cached. Free health.

Free screenshot and webpage capture API. Capture full-page screenshots, specific elements, or PDF snapshots of any URL. No API keys required.

Visit https://brave.com/search/api/ for a free API key. Search the web, local businesses, images,…

Fetch pages as markdown or HTML, search the web and news, and extract JSON-LD structured data. Built for AI agents. $2.50/1k requests, 500 free on signup.

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

Comment on AI-generated webpages; feedback flows back to your coding agent. Free, MIT, local-first.