convertUnit

Converts a numeric value from one unit of measurement to another. Requires amount and the source unit, with spaces written as underscores.

SERVERAPI Ninjas SOURCEhttps://mcp.api-ninjas.com/mcp

Medium RISK CLASS

Category Write

Parameters 22 required

Recommended Rate-limitedsee the rule below

Registry record Grade D, identity unverified Pull the record →

This record as markdown: /tools/com-api-ninjas-mcp/convertunit.md

WHAT IT DOES

What convertUnit does on API Ninjas

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

Parameter	Type	Required	Description
`unit`	string	Yes	The source unit to convert from. Spaces should be replaced with underscores.
`amount`	number	Yes	The numerical value to convert.

Parameters from the server's own tool schema.

RISK

Why convertUnit is rated Medium

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

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs convertUnit safely

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

convertUnit Rate-limited

convertUnit 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": {
    "convertUnit": {
      "limits": [
        {
          "counter": "convertunit_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 API Ninjas, apply this rule, and every convertUnit call is checked against it from then on.

FAQ

Questions about convertUnit

What does the convertUnit tool do? +

Converts a numeric value from one unit of measurement to another. Requires amount and the source unit, with spaces written as underscores. It is categorised as a Write tool in the API Ninjas MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

What parameters does convertUnit accept? +

convertUnit accepts 2 parameters: unit, amount. Required: unit, amount. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on convertUnit? +

Register the API Ninjas MCP server in PolicyLayer and add a rule for convertUnit: 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 API Ninjas. Nothing to install.

What risk level is convertUnit? +

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

Can I rate-limit convertUnit? +

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

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

convertUnit is provided by the API Ninjas MCP server (https://mcp.api-ninjas.com/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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