AI agents use set_api_key to create or update resources in Z Zero — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Z Zero environment.
| Parameter | Type | Required | Description |
|---|---|---|---|
api_key | string | Yes | The new Passport Key to activate. Must start with 'zk_live_' or 'zk_test_'. Get from: https://www.clawcard.store/dashboard/agents |
Parameters from the server's own tool schema.
This tool persists a credential (API key) into system state, making it a Write operation that modifies configuration. It is not Execute (no code execution), Destructive (reversible—keys can be rotated), or Financial (no money moves directly).
From the tool's definition Tool name 'set_api_key' and description 'Activate a new Passport Key instantly' indicate credential configuration that modifies system state. The instruction 'Only call when user explicitly provides a key' shows it accepts and stores authentication material.
Risk signalsHandles credentials or secrets (api_key)
Attacks that exploit this kind of access
Activate a new Passport Key instantly, no restart needed. Only call when user explicitly provides a key. It is categorised as a Write tool in the Z Zero MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
set_api_key accepts 1 parameter: api_key. Required: api_key. The full parameter table on this page comes from the server's own tool schema.
Register the Z Zero MCP server in PolicyLayer and add a rule for set_api_key: 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 Z Zero. Nothing to install.
set_api_key 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 set_api_key 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 set_api_key. 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.
set_api_key is provided by the Z Zero MCP server (z-zero-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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