retrieveWebhookWithId
Retrieves the webhook for the given Id. If you pass in null for the Id, this will return all the webhooks.
This record as markdown: /tools/io-fusionauth-mcp-api/retrievewebhookwithid.md
What retrieveWebhookWithId does on Fusionauth
AI agents call retrieveWebhookWithId to retrieve information from Fusionauth without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why retrieveWebhookWithId is rated Low
This tool only queries and retrieves webhook data. The verbs 'retrieves' and 'return' indicate read-only access with no side effects. Even though webhooks can be sensitive configuration items, retrieving them does not modify state or enable immediate harm; the severity is low because knowledge alone of webhook URLs or settings poses limited direct risk compared to modification or deletion of webhooks.
From the tool's definition Tool description states it 'Retrieves the webhook' and 'will return all the webhooks' - purely retrieval operations with no modification or deletion.
Attacks that exploit this kind of access
The rule that runs retrieveWebhookWithId 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 retrieveWebhookWithId, this is the rule to start with:
retrieveWebhookWithId is read-only, so it stays allowed. 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 retrieveWebhookWithId call is checked against it from then on.
Questions about retrieveWebhookWithId
Retrieves the webhook for the given Id. If you pass in null for the Id, this will return all the webhooks. It is categorised as a Read tool in the Fusionauth MCP Server, which means it retrieves data without modifying state.
Register the Fusionauth MCP server in PolicyLayer and add a rule for retrieveWebhookWithId: 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.
retrieveWebhookWithId is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the retrieveWebhookWithId 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 retrieveWebhookWithId. 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.
retrieveWebhookWithId 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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