"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.

eu-verify lets AI agents verify any European business partner: company existence (official French SIREN registry), insolvency records (BODACC), EU VAT validation before invoicing (VIES), SIRET/IBAN/LEI checks, address and email verification, French business-day deadlines and EU public tenders. 10 paid MCP tools + a free catalog tool, plus 81 HTTP endpoints. Each call costs $0.001-$0.01 in USDC on Base via the x402 protocol - no account, no API key, never billed for failed answers. Official sourc

Query US tap-water quality from the EPA's own SDWIS records: the water systems serving a city, contaminants and violations on record (with dates and whether the EPA classifies them as health-based), compare cities, and explain contaminants. Public, no-auth, read-only. ~19,000 cities across all 50 states + DC, ~1.5M EPA records. Every response reports what the EPA recorded, never a safety verdict.

AQUAVIEW MCP is a hosted Model Context Protocol server that gives any LLM agent direct access to 700,000+ oceanographic, atmospheric, and marine datasets from 68 authoritative sources — NOAA, IOOS, World Ocean Database, Argo, GOES-R, NEXRAD, ESA Sentinel, and more. Ask in plain English; the server returns structured results with direct download links for NetCDF, GRIB2, GeoTIFF, and CSV files.

Pay-per-request FEC campaign finance data for AI agents. Access federal candidate fundraising totals, individual donor contributions, and Super PAC independent expenditures via x402 protocol — no API keys, no subscriptions. Covers all 2026 midterm Senate, House, and Presidential races. Data sourced directly from the Federal Election Commission.