createConnectorWithId
Creates a connector. You can optionally specify an Id for the connector, if not provided one will be generated.
This record as markdown: /tools/io-fusionauth-mcp-api/createconnectorwithid.md
What createConnectorWithId does on Fusionauth
AI agents use createConnectorWithId 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.
Why createConnectorWithId is rated Medium
This tool creates new connectors, which are reversible but represent creation of infrastructure configuration. While not irreversible (connectors can typically be deleted), the creation of authentication connectors could enable unauthorized integrations or elevation of security risks if misused by an AI agent.
From the tool's definition The tool description states it "Creates a connector", which is a create operation that modifies system state. Connectors in authentication systems are infrastructure components that establish integrations with external identity providers or services.
Attacks that exploit this kind of access
The rule that runs createConnectorWithId 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 createConnectorWithId, this is the rule to start with:
createConnectorWithId 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.
The button opens the PolicyLayer dashboard: create your workspace, connect Fusionauth, apply this rule, and every createConnectorWithId call is checked against it from then on.
Questions about createConnectorWithId
Creates a connector. You can optionally specify an Id for the connector, if not provided one will be generated. 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.
Register the Fusionauth MCP server in PolicyLayer and add a rule for createConnectorWithId: 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.
createConnectorWithId is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the createConnectorWithId 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.
Set action: deny in the PolicyLayer policy for createConnectorWithId. 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.
createConnectorWithId 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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