verifyUserRegistrationWithId

Confirms a user

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/verifyuserregistrationwithid.md

WHAT IT DOES

What verifyUserRegistrationWithId does on Fusionauth

AI agents use verifyUserRegistrationWithId 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 verifyUserRegistrationWithId is rated Medium

Confirming/verifying a user registration changes the user's state in the system (e.g., marking them as verified), which is a reversible write operation. It does not delete data or execute code, but it does modify persistent state. Confidence is moderate because the description is very brief and lacks detail about exact side effects.

From the tool's definition "Confirms a user" — verification/confirmation of a user registration is a state change that modifies the user's registration status

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs verifyUserRegistrationWithId 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 verifyUserRegistrationWithId, this is the rule to start with:

verifyUserRegistrationWithId Rate-limited

verifyUserRegistrationWithId 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": {
    "verifyUserRegistrationWithId": {
      "limits": [
        {
          "counter": "verifyuserregistrationwithid_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 verifyUserRegistrationWithId call is checked against it from then on.

FAQ

Questions about verifyUserRegistrationWithId

What does the verifyUserRegistrationWithId tool do? +

Confirms a user. 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 verifyUserRegistrationWithId? +

Register the Fusionauth MCP server in PolicyLayer and add a rule for verifyUserRegistrationWithId: 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 verifyUserRegistrationWithId? +

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

Can I rate-limit verifyUserRegistrationWithId? +

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

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

verifyUserRegistrationWithId 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.

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