U.CASH Pay MCP Server

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answering

U.CASH Pay is answering right now. Last checked 5 min ago. It exposes 14 tools. Last commit 14 Sep 2026.

Pay x402 resources on U.CASH from your own wallet: view the price, pay on-chain, settle by hash.

Uptime history 30 days of history · worst day 18%

30 days agonow

100.0%

Uptime 24h

92 of 92 checks

Tools

read from the server

703 ms

Response time

average over 24h

Stars

last commit 14 Sep 2026

What changed 6

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 5 October 2026. No other catalogue keeps this.

5 Oct 3 tools changed the parameters they ask for uxc_get_market, uxc_get_services, uxc_lookup_products

5 Oct 2 tools appeared uxc_discover_servers, uxc_discover_tools

5 Oct a tool changed version

U.CASH Pay missed one check this week

Everything else answered, so this is steady rather than shaky. We check every 15 minutes, which is how a one-off gets told apart from the start of a pattern, and how you hear about the next one within the hour instead of from your users.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 5 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add ucash-pay --transport http https://mcp.u.cash/

Settings → Connectors → Add custom connector, then paste this address

https://mcp.u.cash/

~/.codex/config.toml

[mcp_servers.ucash-pay]
url = "https://mcp.u.cash/"

.cursor/mcp.json

{
  "mcpServers": {
    "ucash-pay": {
      "url": "https://mcp.u.cash/"
    }
  }
}

.vscode/mcp.json

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

Available tools 14

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

uxc

uxc_cancel_checkout

Cancel a UCP checkout session. 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_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_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.

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.

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_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_order

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

uxc_get_product

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

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_lookup_products

Batch catalog lookup by ids. Public (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_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.

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.

Endpoints

URL	Transport	State	Latency	Checked
https://mcp.u.cash/	streamable-http	answering	658 ms	5 min ago

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U.CASH Pay — questions

Answers built from our own checks of this server.

What can U.CASH Pay do?

It exposes 14 tools, read directly from the server on our last check. Among them: uxc_cancel_checkout, uxc_complete_checkout, uxc_create_checkout, uxc_discover_servers, uxc_discover_tools, uxc_get_checkout and 8 more. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is U.CASH Pay working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 92 of 92 checks got a reply (100.0%), average response time 703 ms. The bar chart above shows every period we have measured.

How do I connect U.CASH Pay?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does U.CASH Pay need an API key?

No. U.CASH Pay completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 14 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is U.CASH Pay?

It answers our handshake in 703 ms on average, which is faster than 13% of all working MCP servers we measure. That is on the slow side — worth knowing if the tool sits inside an interactive loop. The comparison comes from our own checks across the whole registry, every 15 minutes.

Is U.CASH Pay open source?

The code is open source: it is published under the MIT licence, written in Python and 0 stars on GitHub. The licence covers the code in the repository, not the hosted service at mcp.u.cash, which runs on its operator's own terms.