createAPIKey

SERVERFusionauth SOURCE@fusionauth/mcp-api

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-fusionauth-mcp-api/createapikey.md

WHAT IT DOES

What createAPIKey does on Fusionauth

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

RISK

Why createAPIKey is rated Medium

This tool creates new API keys, which are credentials that grant programmatic access to the FusionAuth system. While the creation itself is reversible (keys can be deleted), the tool enables persistent authentication tokens that could be misused if generated maliciously or with excessive permissions.

From the tool's definition Creates an API key

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs createAPIKey safely

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

createAPIKey Rate-limited

createAPIKey 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": {
    "createAPIKey": {
      "limits": [
        {
          "counter": "createapikey_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 Fusionauth, apply this rule, and every createAPIKey call is checked against it from then on.

FAQ

Questions about createAPIKey

What does the createAPIKey tool do? +

Creates an API key. You can optionally specify a unique Id for the key, if not provided one will be generated. an API key can only be created with equal or lesser authority. An API key cannot create another API key unless it is granted to that API key. If an API key is locked to a tenant, it can only create API Keys for that same tenant. It is categorised as a Write tool in the Fusionauth MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on createAPIKey? +

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

What risk level is createAPIKey? +

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

Can I rate-limit createAPIKey? +

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

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

createAPIKey is provided by the Fusionauth MCP server (@fusionauth/mcp-api). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

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