helm-chart-info

Instructions

Implementation Reference

• src/tools/info.ts:15-44 (handler)

  Handler function for the helm-chart-info tool, which fetches chart info using getChartInfo and formats the response as text.

  async ({ chartRepo, chartName }: InfoParams) => {
  	try {
  		const data = await getChartInfo(chartRepo, chartName);
  
  		return {
  			content: [
  				{
  					type: "text",
  					text: JSON.stringify(
  						{
  							id: data.package_id,
  							latest_version: data.version,
  							description: data.description,
  						},
  						null,
  						2
  					),
  				},
  			],
  		};
  	} catch (error) {
  		return {
  			content: [
  				{
  					type: "text",
  					text: `Error retrieving chart info: ${(error as Error).message}`,
  				},
  			],
  		};
  	}

• src/tools/info.ts:11-14 (schema)

  Zod schema defining input parameters for the helm-chart-info tool: chartRepo and chartName.

  {
  	chartRepo: z.string().describe("The Helm chart repository name"),
  	chartName: z.string().describe("The Helm chart name"),
  },

• src/tools/info.ts:7-47 (registration)

  Registration of the helm-chart-info tool with the MCP server, including name, description, schema, and handler.

  export function registerInfoTool(server: McpServer) {
  	return server.tool(
  		"helm-chart-info",
  		"Get information about a Helm chart from Artifact Hub, including ID, latest version, and description",
  		{
  			chartRepo: z.string().describe("The Helm chart repository name"),
  			chartName: z.string().describe("The Helm chart name"),
  		},
  		async ({ chartRepo, chartName }: InfoParams) => {
  			try {
  				const data = await getChartInfo(chartRepo, chartName);
  
  				return {
  					content: [
  						{
  							type: "text",
  							text: JSON.stringify(
  								{
  									id: data.package_id,
  									latest_version: data.version,
  									description: data.description,
  								},
  								null,
  								2
  							),
  						},
  					],
  				};
  			} catch (error) {
  				return {
  					content: [
  						{
  							type: "text",
  							text: `Error retrieving chart info: ${(error as Error).message}`,
  						},
  					],
  				};
  			}
  		}
  	);
  }

• src/services/artifactHub.ts:38-46 (helper)

  Core helper function that fetches the Helm chart information from the Artifact Hub API.

  export async function getChartInfo(
  	chartRepo: string,
  	chartName: string
  ): Promise<ArtifactHubPackage> {
  	const url = `https://artifacthub.io/api/v1/packages/helm/${encodeURIComponent(
  		chartRepo
  	)}/${encodeURIComponent(chartName)}`;
  	return (await fetchFromArtifactHub(url)) as ArtifactHubPackage;
  }

• src/types/artifactHub.ts:14-17 (schema)

  TypeScript interface defining the input parameters for the helm-chart-info tool.

  export interface InfoParams {
  	chartRepo: string;
  	chartName: string;
  }

• src/services/artifactHub.ts:9-35 (helper)

  Utility function to fetch data from Artifact Hub API, used by getChartInfo.

  export async function fetchFromArtifactHub(
  	url: string,
  	isYaml: boolean = false
  ): Promise<any> {
  	try {
  		const response = await fetch(url, {
  			headers: {
  				Accept: isYaml ? "application/yaml" : "application/json",
  			},
  		});
  
  		if (!response.ok) {
  			throw new Error(
  				`API request failed with status ${response.status}: ${response.statusText}`
  			);
  		}
  
  		if (isYaml) {
  			return await response.text();
  		} else {
  			return await response.json();
  		}
  	} catch (error) {
  		console.error("Error fetching from Artifact Hub:", error);
  		throw error;
  	}
  }