"USPS" matching MCP connectors:

• AssayChain — Mineral Intelligence (USGS and Field Runs)A

  USGS commodity benchmarks, attested field run logs, and mining/geologic district data for AI agents. Nine data endpoints gated by x402 ($0.10 USDC on Base). Tools: get_commodity_benchmark (gold, silver, copper, and 17 more critical minerals), get_ultrasound_run_data (on-chain EAS-attested gravity-separation field runs), district.history (MRDS-sourced deposit and assay history by country/state/district), and ask_sales_agent. No API keys — pay per call in USDC.

  Government DataOpen DataResearch & Data

  91
  Connect
• USGS EarthquakesA

  Real-time earthquake events from the US Geological Survey

  Government DataOpen DataSearch

  31
  Connect
• USGS Water MonitoringA

  Real-time water levels and flow rates from USGS stream gauges

  Government DataOpen DataMonitoring

  31
  Connect
• Usgs VolcanoA

  USGS Volcano MCP — Volcano Hazards Program HANS-public feed (no auth)

  Government DataResearch & DataOpen Data

  221
  Connect