"Semantic Web" matching MCP connectors:

Search + read the web for $0.002/page; failed URLs free; per-URL errors never fail the call.

30+ marketing data tools for AI agents: keywords, SERP, backlinks, AI visibility, app store & commerce intelligence, Reddit/LinkedIn/Facebook/YouTube research, web search, page extraction, site audit, image & video generation, one-shot marketing apps. Bring your own API key from supamarketers.com — per-tool pricing in Credits.

Open Graph, JSON-LD, canonical, robots, headings and page metadata extractor via direct x402 MCP.

x402 cited web research and synthesis for agents. $1.99 per completed brief.

Deterministic webpage change detection, hashes and text diffs for recurring monitoring via x402 MCP.

Secant Agent Research PackC

io.github.jnilrac

Paid MCP web research for agents: search, extraction, citations, and x402 payment discovery.