U.CASH Pay

Reliability

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How to connect

Add it to any MCP client that supports remote servers.

{
  "mcpServers": {
    "u-cash-pay": {
      "type": "http",
      "url": "https://mcp.u.cash/"
    }
  }
}

14 tools

• uxc_view_door

  Fetch the public 402 payment door for a resource (what a buyer sees at https://agents.u.cash/r/{res_id}): the price + the multi-coin accepts[] (each asset, the seller receive address, and the exact amount to pay). No key. Use as a BUYER to see what to pay, then…

• uxc_verify_payment

  BUYER-SIDE. After paying a resource (from uxc_view_door) on-chain from your own wallet, submit the transaction hash to settle it. Pass the challengeId from the accepts[] entry you paid and the on-chain transaction hash. Returns settled (confirmed) or pending (awaiting…

• uxc_get_market

  The PUBLIC cross-merchant market catalog: every published checkout across merchants (id, title, price, currency, merchant, domain, payable url). No key. q filters by title/merchant/description.

• uxc_get_services

  The PUBLIC cross-provider services catalog (eSend rail: each row carries the provider contact email, a sendable asset code and a price). No key.

• uxc_search_catalog

  Search a merchant catalog (text query + price filters + pagination). The merchant is resolved from a cloud token (the "cloud" argument) or the platform default. No key.

• uxc_get_product

  Fetch a single catalog product by id. Public (no key); pair with uxc_search_catalog to find ids.

• uxc_lookup_products

  Batch catalog lookup by ids. Public (no key).

• uxc_create_checkout

  Create a UCP checkout session (multi-item, mixed-currency cart) for a merchant catalog. No key. Returns {id, status, currency, line_items, totals, ap2}.

• uxc_get_checkout

  Fetch a UCP checkout session by id (status: incomplete -> ready_for_complete -> completed). No key; pass cloud for a hosted merchant.

• uxc_complete_checkout

  Mint payment challenges for a checkout session -> ready_for_complete. Optional ap2 (AP2 checkout mandate). No key; pass cloud for a hosted merchant.

• uxc_cancel_checkout

  Cancel a UCP checkout session. No key; pass cloud for a hosted merchant.

• uxc_get_order

  View a UCP checkout session as an order (per-item fulfillment status + fulfillment events). No key; pass cloud for a hosted merchant.

• uxc_discover_servers

  List every u.cash MCP server in the fleet (buyer, seller, prime, legacy): product surface, auth model, transports with install coordinates, docs URL. Optional q filters by name/product/summary. Discovery only - connect to each server directly with your own credentials; no call…

• uxc_discover_tools

  Search tools across every u.cash MCP server by name or description (case-insensitive substring), optionally scoped to one server. Returns the tool, a one-liner, its server, and how to connect. Discovery only - connect to that server directly; no call is ever proxied.

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