"USPS" matching MCP connectors:
GET /v1/connectors – MCP directory API referenceMatching Connector Tools:
Send a USPS Certified Mail letter to any US address from ChatGPT, Claude or Grok. The assistant prepares the letter and hands back a review link; a person reads it, checks the recipient, pays and authorizes. Nothing is printed, mailed or charged without that approval. $16.17 with the electronic return receipt, $13.18 without. No subscription, and no account needed to see a price. Docs: https://piloxa.com/send-a-certified-letter-online
Live USPS, UPS, FedEx and DHL rates from the US: domestic, Canada, UK, Germany, Australia. No scale.
Query real-time and historical USGS water data from ~8,000 stream gages and groundwater wells.
Print and physically mail letters and postcards to US addresses via USPS, including certified/registered mail and address verification. Paid per call in USDC on Base via the x402 protocol, no signup.
Prepare USPS Certified Mail letters from any AI assistant; a person reviews, pays and authorizes.
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.
Print and mail physical documents in the US via USPS, with quotes, agent payment and tracking.
River levels & flood alerts: USGS gauges. $0.01/query. Register in-session — free testnet funds.
Live USGS earthquake alerts: M2.5+ 24h, mag, depth. Register in-session — free testnet funds.
