n8n Management MCP Server

Instructions

Implementation Reference

• src/n8n-client.ts:146-148 (handler)

  The actual handler that executes the n8n_delete_credential tool. Makes a DELETE request to the n8n API endpoint /api/v1/credentials/{id} with authentication headers.

  async deleteCredential(id: string) {
    return this.request(`${this.apiBase}/credentials/${id}`, { method: 'DELETE' });
  }

• src/tools.ts:307-323 (schema)

  Schema definition for n8n_delete_credential tool. Defines the input parameters (id as required string), description, and annotations indicating this is a destructive operation.

    name: 'n8n_delete_credential',
    description: 'Remove stored credential. Cannot delete credentials currently used in active workflows. Deactivate dependent workflows first. Use with caution as this may break workflows.',
    inputSchema: {
      type: 'object',
      properties: {
        id: { type: 'string', description: 'Credential ID to permanently delete' },
      },
      required: ['id'],
    },
    annotations: {
      title: 'Delete Credential',
      readOnlyHint: false,
      destructiveHint: true,
      idempotentHint: true,
      openWorldHint: true,
    },
  },

• src/server.ts:61-62 (registration)

  Routing logic in the handleToolCall function that maps the 'n8n_delete_credential' tool name to the client.deleteCredential method, passing args.id as the parameter.

  case 'n8n_delete_credential':
    return client.deleteCredential(args.id);

• src/types.ts:37-44 (helper)

  Type definition for N8nCredential objects, defining the structure of credential data including id, name, type, data, and timestamps.

  export interface N8nCredential {
    id: string;
    name: string;
    type: string;
    data?: any;
    createdAt: string;
    updatedAt: string;
  }