updateWebhookWithId
Updates the webhook with the given Id.
This record as markdown: /tools/io-fusionauth-mcp-api/updatewebhookwithid.md
What updateWebhookWithId does on Fusionauth
AI agents use updateWebhookWithId 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 updateWebhookWithId is rated Medium
This tool modifies webhook configuration, which can change callback URLs, event triggers, and authentication settings. While reversible (Write category, not Destructive), webhooks directly influence which external systems receive sensitive event data and how they're triggered. Misuse could redirect webhooks to attacker-controlled endpoints, intercept authentication events, or alter notification behavior.
From the tool's definition Tool name 'updateWebhookWithId' and description 'Updates the webhook with the given Id' indicate modification of existing data (webhook configuration).
Attacks that exploit this kind of access
The rule that runs updateWebhookWithId 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 updateWebhookWithId, this is the rule to start with:
updateWebhookWithId 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 updateWebhookWithId call is checked against it from then on.
Questions about updateWebhookWithId
Updates the webhook with the given Id. 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 updateWebhookWithId: 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.
updateWebhookWithId 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 updateWebhookWithId 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 updateWebhookWithId. 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.
updateWebhookWithId 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.
More on Fusionauth, and thousands of servers like it.
This server
Across the catalogue