create_mock

Create a new mock server. Creates in Personal workspace if workspace not specified.

SERVERPostman SOURCEdelano/postman-mcp-server

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/delano-postman-mcp-server/create-mock.md

WHAT IT DOES

What create_mock does on Postman

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

RISK

Why create_mock is rated Medium

This tool creates a new mock server resource in Postman, which is a reversible write operation. It does not execute code, delete data, or involve financial transactions. Misuse could clutter workspaces or expose unintended mock endpoints, hence medium severity.

From the tool's definition 'Create a new mock server' — creates a new resource in a workspace

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs create_mock safely

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

create_mock Rate-limited

create_mock 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_mock": {
      "limits": [
        {
          "counter": "create_mock_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 Postman, apply this rule, and every create_mock call is checked against it from then on.

FAQ

Questions about create_mock

What does the create_mock tool do? +

Create a new mock server. Creates in Personal workspace if workspace not specified. It is categorised as a Write tool in the Postman 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_mock? +

Register the Postman MCP server in PolicyLayer and add a rule for create_mock: 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 Postman. Nothing to install.

What risk level is create_mock? +

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

Can I rate-limit create_mock? +

Yes. Add a rate_limit block to the create_mock 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_mock completely? +

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

create_mock is provided by the Postman MCP server (delano/postman-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

What create_mock does on Postman

Why create_mock is rated Medium

The rule that runs create_mock safely

Questions about create_mock

More on Postman, and thousands of servers like it.