Official MCP RegistryListed
U.CASH Pay
Pay x402 resources on U.CASH from your own wallet: view the price, pay on-chain, settle by hash.
First seen 4 Oct 2026. Evidence as of 7 Oct 2026.
14
Tools
From an anonymous probe
1
Source listings
Each with its own history
7
Recorded changes
Since first seen
Tools
| Tool | Description | Behaviour |
|---|---|---|
| uxc_cancel_checkout | Cancel a UCP checkout session. No key; pass cloud for a hosted merchant. | Not declared |
| 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. | Not declared |
| 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}. | Not declared |
| 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 is ever proxied. | Not declared |
| 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. | Not declared |
| uxc_get_checkout | Fetch a UCP checkout session by id (status: incomplete -> ready_for_complete -> completed). No key; pass cloud for a hosted merchant. | Not declared |
| 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. | Not declared |
| 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. | Not declared |
| uxc_get_product | Fetch a single catalog product by id. Public (no key); pair with uxc_search_catalog to find ids. | Not declared |
| 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. | Not declared |
| uxc_lookup_products | Batch catalog lookup by ids. Public (no key). | Not declared |
| 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. | Not declared |
| 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 confirmations). No seller key needed - the challengeId identifies the resource, and settlement is gated by on-chain confirmation. | Not declared |
| 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 after paying. status=true polls settlement without minting a new challenge. | Not declared |
Change history
- uxc_lookup_products: input schema changed (+fields)
- uxc_get_services: input schema changed (+fields)
- uxc_get_market: input schema changed (+fields)
- uxc_discover_tools: tool added
- uxc_discover_servers: tool added
- server instructions changed (+"included; list tools accept an optional fields projection; uxc_discover_servers/uxc_discover_tools search the whole u.cash MCP fleet." -"included.")
- Listed (registry)
| Source | Listing | First seen | Last seen | Versions |
|---|---|---|---|---|
| Official MCP Registry | cash.u/ucash-pay | 4 Oct 2026 | 7 Oct 2026 | 1 |