POST /apps/{appId}/recordings/{testSetId}/mocks — Author one mock under a recording — Insert a single mock into the given test set. When branch_id is supplied, the mock lands on that branch's overlay (branch_sandbox_ops) and only surfaces to main on merge. Without branch_id the mock writes straig...
Part of the Keploy server.
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AI agents use createMock to create or modify resources in Keploy. Write operations carry medium risk because an autonomous agent could trigger bulk unintended modifications. Rate limits prevent a single agent session from making hundreds of changes in rapid succession. Argument validation ensures the agent passes expected values.
Without a policy, an AI agent could call createMock repeatedly, creating or modifying resources faster than any human could review. PolicyLayer's rate limiting ensures write operations happen at a controlled pace, and argument validation catches malformed or unexpected inputs before they reach Keploy.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
{
"version": "1",
"default": "deny",
"tools": {
"createMock": {
"limits": [
{
"counter": "createmock_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}See the full Keploy policy for all 103 tools.
These attack patterns abuse exactly the kind of access createMock gives an agent. Each links to the full case and the policy that stops it:
Other write tools across the catalogue. The same approach applies to each: rate-limit and validate the arguments.
POST /apps/{appId}/recordings/{testSetId}/mocks — Author one mock under a recording — Insert a single mock into the given test set. When branch_id is supplied, the mock lands on that branch's overlay (branch_sandbox_ops) and only surfaces to main on merge. Without branch_id the mock writes straight to main — same behaviour as the recording-driven agent path. Authoring shape — pick ONE: - mock_yaml (PREFERRED) — paste the canonical mock YAML envelope (version / kind / name / spec with the per-kind payload, exactly as it lives in mocks.yaml on disk). The server decodes via OSS DecodeMocks so kind- specific Spec contents (req, resp, metadata, …) round-trip without field-name loss. This is the only path that preserves payloads pasted from existing mocks. - mock — typed OSS Mock JSON object. Brittle: the OSS struct uses PascalCase JSON tags (Metadata, Req, Res), so lowercase canonical keys are silently dropped. Use only when authoring programmatically from typed Go shapes. When both are sent, mock_yaml wins. Requires scope: write.. It is categorised as a Write tool in the Keploy MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Keploy MCP server in PolicyLayer and add a rule for createMock: 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 Keploy. Nothing to install.
createMock 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 createMock 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 createMock. 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.
createMock is provided by the Keploy MCP server (https://api.keploy.io/client/v1/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 103 Keploy tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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