CoinStats MCP Server

Instructions

Input Schema

Input Schema (JSON Schema)

Implementation Reference

• src/tools/toolFactory.ts:21-77 (handler)

  Generic handler function registered for each API tool, including 'get-news-sources'. For non-local tools, it calls universalApiHandler with the config's endpoint ('/news/sources'), method ('GET'), and parameters to fetch data from CoinStats API.
  server.tool(config.name, config.description, config.parameters, async (params: Record<string, any>) => { // Handle local operations if (config.isLocal) { // Handle specific local tools if (config.name === 'save-share-token') { await saveToCache('shareToken', params.shareToken); return { content: [ { type: 'text', text: 'Share token saved successfully', }, ], }; } if (config.name === 'get-share-token') { const shareToken = await getFromCache('shareToken'); return { content: [ { type: 'text', text: shareToken ? shareToken : 'No share token found in cache', isError: !shareToken, }, ], }; } // Future local tools can be added here // Default response for unhandled local tools return { content: [ { type: 'text', text: 'Operation completed', }, ], }; } // Handle API operations const basePath = config.basePath || COINSTATS_API_BASE; const method = config.method || 'GET'; // Methods that typically have a request body const bodyMethods = ['POST', 'PUT', 'PATCH', 'DELETE']; // For GET/DELETE requests, all params go in the URL // For POST/PUT/PATCH, send params as the body if (bodyMethods.includes(method.toUpperCase())) { return universalApiHandler(basePath, config.endpoint, method, {}, params); } else { return universalApiHandler(basePath, config.endpoint, method, params); } });
• src/tools/toolConfigs.ts:294-300 (schema)

  Tool configuration defining the input schema (empty parameters object), description, endpoint, and method for the 'get-news-sources' tool.
  { name: 'get-news-sources', description: 'Get news sources.', endpoint: '/news/sources', method: 'GET', parameters: {}, },
• src/index.ts:17-18 (registration)

  Invokes registerTools to register all tools from allToolConfigs, including 'get-news-sources', on the MCP server.
  // Register all tools from configurations registerTools(server, allToolConfigs);
• src/services/request.ts:35-97 (helper)

  Helper function that handles the actual API request execution: processes endpoint and parameters, makes authenticated fetch to CoinStats API (e.g., open.coinstats.app/public/v1/news/sources), and returns JSON response as MCP tool content.
  export async function universalApiHandler<T>( basePath: string, endpoint: string, method: string = 'GET', params: Record<string, any> = {}, body?: any ): Promise<{ content: Array<{ type: 'text'; text: string; isError?: boolean }>; }> { try { // Handle path parameters - replace {paramName} in endpoint with actual values let processedEndpoint = endpoint; let processedParams = { ...params }; // Find all path parameters in the endpoint (e.g., {coinId}, {id}, {type}) const pathParamMatches = endpoint.match(/\{([^}]+)\}/g); if (pathParamMatches) { for (const match of pathParamMatches) { const paramName = match.slice(1, -1); // Remove { and } if (processedParams[paramName] !== undefined) { // Replace the placeholder with the actual value processedEndpoint = processedEndpoint.replace(match, processedParams[paramName]); // Remove the parameter from query params since it's now part of the path delete processedParams[paramName]; } else { throw new Error(`Required path parameter '${paramName}' is missing`); } } } // MCP clients might not support '~' in parameter names, so we replace '-' with '~' specifically for the /coins endpoint before making the request. if (endpoint === '/coins') { processedParams = Object.entries(processedParams).reduce((acc, [key, value]) => { acc[key.replace(/-/g, '~')] = value; return acc; }, {} as Record<string, any>); } const url = `${basePath}${processedEndpoint}`; const data = await makeRequestCsApi<T>(url, method, processedParams, body); if (!data) { return { content: [{ type: 'text', text: 'Something went wrong', isError: true }], }; } return { content: [ { type: 'text', text: JSON.stringify(data), }, ], }; } catch (error) { return { content: [{ type: 'text', text: `Error: ${error}`, isError: true }], }; } }