create_app_proxy · Shopify Graphql MCP: Risk & Policy

WHAT IT DOES

What create_app_proxy does on Shopify Graphql

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

WHY IT NEEDS A POLICY

Why create_app_proxy needs a policy

Creating an app proxy establishes a new URL routing rule that proxies requests through a Shopify app, which is a reversible write operation. However, it has high severity because misconfigured app proxies can expose store data or redirect traffic maliciously, and requires elevated app management permissions.

From the tool's definition 'Create an app proxy for an app' — creates a new resource (app proxy) in the Shopify store

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_app_proxy Rate-limited

create_app_proxy 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": {
    "create_app_proxy": {
      "limits": [
        {
          "counter": "create_app_proxy_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Shopify Graphql, so you can run agents against it safely.

FAQ

Questions about create_app_proxy

What does the create_app_proxy tool do? +

Create an app proxy for an app (requires app management permissions). It is categorised as a Write tool in the Shopify Graphql MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on create_app_proxy? +

Register the Shopify Graphql MCP server in PolicyLayer and add a rule for create_app_proxy: 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 Shopify Graphql. Nothing to install.

What risk level is create_app_proxy? +

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

Can I rate-limit create_app_proxy? +

Yes. Add a rate_limit block to the create_app_proxy 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 create_app_proxy completely? +

Set action: deny in the PolicyLayer policy for create_app_proxy. 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 create_app_proxy? +

create_app_proxy is provided by the Shopify Graphql MCP server (uvu-store/shopify-graphql-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

// THE FULL RECORD

create_app_proxy is one line of Shopify Graphql's registry record.

The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.

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