ucp_checkout

Start a Stripe checkout session for a UCP product. Returns the hosted checkout URL the buyer needs to visit. Required: product_id (or slug) + customer_email.

SERVER0nmcp SOURCE0nmcp

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-0nork-0nmcp/ucp-checkout.md

WHAT IT DOES

What ucp_checkout does on 0nmcp

AI agents use ucp_checkout to create or update resources in 0nmcp, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your 0nmcp environment.

RISK

Why ucp_checkout is rated Medium

An AI agent can call ucp_checkout faster than any human can review: one bad instruction and it creates or modifies resources in 0nmcp by the hundred, each call as confident as the last.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs ucp_checkout safely

PolicyLayer is an MCP gateway: it sits between your AI agents and 0nmcp, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For ucp_checkout, this is the rule to start with:

ucp_checkout Rate-limited

ucp_checkout stays usable, but capped: an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "ucp_checkout": {
      "limits": [
        {
          "counter": "ucp_checkout_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect 0nmcp, apply this rule, and every ucp_checkout call is checked against it from then on.

FAQ

Questions about ucp_checkout

What does the ucp_checkout tool do? +

Start a Stripe checkout session for a UCP product. Returns the hosted checkout URL the buyer needs to visit. Required: product_id (or slug) + customer_email. It is categorised as a Write tool in the 0nmcp MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on ucp_checkout? +

Register the 0n MCP server in PolicyLayer and add a rule for ucp_checkout: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches 0nmcp. Nothing to install.

What risk level is ucp_checkout? +

ucp_checkout is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit ucp_checkout? +

Yes. Add a rate_limit block to the ucp_checkout rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block ucp_checkout completely? +

Set action: deny in the PolicyLayer policy for ucp_checkout. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides ucp_checkout? +

ucp_checkout is provided by the 0n MCP server (0nmcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

More on 0n, and thousands of servers like it.

This server

All 218 0n tools →

Across the catalogue

The MCP Attack Database →

Guides

Govern customer-ops agents →Argument validation →Scoped token →