"OpenTimestamps - Bitcoin-based timestamping protocol" matching MCP connectors:

A Model Context Protocol server that provides Philippine License to Sell (LTS) verification data to LLMs. Built on Cloudflare Workers with Supabase. Public, read-only, no authentication required. Data sourced from the Department of Human Settlements and Urban Development (DHSUD) License to Sell registry and cross-referenced with published real estate projects on REN.PH.

MCP server for Russian construction market data. Access 3,395 construction companies, 13,436 projects across 18 regions of Russia. Search contractors, compare prices, analyze ratings, get market reports — all via MCP protocol. 21 tools including search, analytics, cost estimation, and contractor recommendations.