U.CASH Pay
Pay x402 resources on U.CASH from your own wallet: view the price, pay on-chain, settle by hash.
Connect it
Settings → Connectors → Add custom connector
URL: https://mcp.u.cash/Settings → Apps & Connectors → Advanced → Developer mode
Create connector with URL: https://mcp.u.cash/{
"mcpServers": {
"ucash-pay": {
"url": "https://mcp.u.cash/"
}
}
}claude mcp add --transport http ucash-pay https://mcp.u.cash/{
"servers": {
"ucash-pay": {
"type": "http",
"url": "https://mcp.u.cash/"
}
}
}14 tools, verified live
uxc_view_doorFetch 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 after paying. status=true polls settlement without minting a new challenge.
uxc_verify_paymentBUYER-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 confirmations). No seller key needed - the challengeId identifies the resource, and settlement is gated by on-chain confirmation.
uxc_get_marketThe 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_servicesThe 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_catalogSearch 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_productFetch a single catalog product by id. Public (no key); pair with uxc_search_catalog to find ids.
uxc_lookup_productsBatch catalog lookup by ids. Public (no key).
uxc_create_checkoutCreate 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_checkoutFetch a UCP checkout session by id (status: incomplete -> ready_for_complete -> completed). No key; pass cloud for a hosted merchant.
uxc_complete_checkoutMint payment challenges for a checkout session -> ready_for_complete. Optional ap2 (AP2 checkout mandate). No key; pass cloud for a hosted merchant.
uxc_cancel_checkoutCancel a UCP checkout session. No key; pass cloud for a hosted merchant.
uxc_get_orderView a UCP checkout session as an order (per-item fulfillment status + fulfillment events). No key; pass cloud for a hosted merchant.
uxc_discover_serversList 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 is ever proxied.
uxc_discover_toolsSearch 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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