Create a new credential. Use n8n_get_credential_schema to discover the required fields for a type.
Part of the n8n MCP Server server.
Free to start. No card required.
AI agents use n8n_create_credential to create or modify resources in n8n MCP Server. 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 n8n_create_credential 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 n8n MCP Server.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
{
"version": "1",
"default": "deny",
"tools": {
"n8n_create_credential": {
"limits": [
{
"counter": "n8n_create_credential_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}See the full n8n MCP Server policy for all 43 tools.
These attack patterns abuse exactly the kind of access n8n_create_credential 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.
Create a new credential. Use n8n_get_credential_schema to discover the required fields for a type.. It is categorised as a Write tool in the n8n MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the n8n MCP Server MCP server in PolicyLayer and add a rule for n8n_create_credential: 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 n8n MCP Server. Nothing to install.
n8n_create_credential 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 n8n_create_credential 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 n8n_create_credential. 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.
n8n_create_credential is provided by the n8n MCP Server MCP server (@nextoolsolutions/mcp-n8n). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 43 n8n MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
4,600+ MCP servers and 31,000+ tools scanned and risk-classified.