call_endpoint

Instructions

Implementation Reference

• src/handlers/endpoint-handlers.ts:170-191 (handler)

  MCP tool handler logic for 'call_endpoint': extracts parameters and calls EndpointManager.fetchEndpoint to execute the request.

  case 'call_endpoint': {
    const endpointId = args?.endpointId as string;
    const pathParams = args?.pathParams as Record<string, string> | undefined;
    const queryParams = args?.queryParams as Record<string, string> | undefined;
    const body = args?.body as any;
  
    const result = await endpointManager.fetchEndpoint(endpointId, {
      pathParams,
      queryParams,
      body,
    });
  
    return {
      content: [
        {
          type: 'text',
          text: JSON.stringify(result, null, 2),
        },
      ],
      isError: !result.success,
    };
  }

• src/handlers/endpoint-handlers.ts:42-67 (schema)

  Input schema definition for the 'call_endpoint' tool, specifying parameters like endpointId, pathParams, queryParams, and body.

  {
    name: 'call_endpoint',
    description: "Call a Pocket Network endpoint with optional parameters",
    inputSchema: {
      type: 'object',
      properties: {
        endpointId: {
          type: 'string',
          description: 'The ID of the endpoint to call',
        },
        pathParams: {
          type: 'object',
          description: 'Path parameters (e.g., {id: "123"} for /users/:id)',
        },
        queryParams: {
          type: 'object',
          description: 'Query parameters to append to the URL',
        },
        body: {
          type: 'object',
          description: 'Request body for POST/PUT/PATCH requests',
        },
      },
      required: ['endpointId'],
    },
  },

• src/index.ts:88-101 (registration)

  Registration of endpoint tools (including 'call_endpoint') by calling registerEndpointHandlers and adding to the tools list used in ListToolsRequestHandler.

  const tools: Tool[] = [
    ...registerBlockchainHandlers(server, blockchainService),
    ...registerDomainHandlers(server, domainResolver),
    ...registerTransactionHandlers(server, advancedBlockchain),
    ...registerTokenHandlers(server, advancedBlockchain),
    ...registerMultichainHandlers(server, advancedBlockchain),
    ...registerContractHandlers(server, advancedBlockchain),
    ...registerUtilityHandlers(server, advancedBlockchain),
    ...registerEndpointHandlers(server, endpointManager),
    ...registerSolanaHandlers(server, solanaService),
    ...registerCosmosHandlers(server, cosmosService),
    ...registerSuiHandlers(server, suiService),
    ...registerDocsHandlers(server, docsManager),
  ];

• src/services/endpoint-manager.ts:65-125 (helper)

  Core helper function implementing the HTTP request logic: builds URL, handles params/body, performs fetch, and returns structured response.

  async fetchEndpoint(
    endpointId: string,
    options?: {
      pathParams?: Record<string, string>;
      queryParams?: Record<string, string>;
      body?: any;
    }
  ): Promise<EndpointResponse> {
    const endpoint = this.getEndpointById(endpointId);
    if (!endpoint) {
      return {
        success: false,
        error: `Endpoint not found: ${endpointId}`
      };
    }
  
    try {
      const url = new URL(this.buildEndpointUrl(endpointId, options?.pathParams));
  
      // Add query parameters
      if (options?.queryParams) {
        Object.entries(options.queryParams).forEach(([key, value]) => {
          url.searchParams.append(key, value);
        });
      }
  
      const fetchOptions: RequestInit = {
        method: endpoint.method,
        headers: {
          'Content-Type': 'application/json',
          'Accept': 'application/json'
        }
      };
  
      if (options?.body && endpoint.method !== 'GET') {
        fetchOptions.body = JSON.stringify(options.body);
      }
  
      const response = await fetch(url.toString(), fetchOptions);
      const data = await response.json();
  
      return {
        success: response.ok,
        data: response.ok ? data : undefined,
        error: response.ok ? undefined : data.message || `HTTP ${response.status}`,
        metadata: {
          timestamp: new Date().toISOString(),
          endpoint: url.toString()
        }
      };
    } catch (error) {
      return {
        success: false,
        error: error instanceof Error ? error.message : 'Unknown error',
        metadata: {
          timestamp: new Date().toISOString(),
          endpoint: endpointId
        }
      };
    }
  }