RSS3 MCP Server

Instructions

Implementation Reference

• index.js:150-223 (handler)

  This is the main handler for executing all dynamically generated MCP tools, including 'API-batchGetFederatedAccountsActivities'. It looks up the corresponding OpenAPI operation based on the tool name and executes it using the HttpClient, proxying the request to the RSS3 API endpoints.
  server.setRequestHandler(CallToolRequestSchema, async (request) => { // console.error("call tool", request.params); const { name, arguments: params } = request.params; console.error("name", name); if (name === "API-get-input-schema") { for (const mcpToolWithClient of mcpToolWithClients) { for (const [toolName, def] of Object.entries( mcpToolWithClient.mcpTools.tools, )) { for (const method of def.methods) { const toolNameWithMethod = `${toolName}-${method.name}`; const truncatedToolName = toolNameWithMethod.slice(0, 64); if (truncatedToolName === params.toolName) { return { content: [ { type: "text", text: JSON.stringify(method.inputSchema) }, ], }; } } } } throw new Error(`Method ${params.toolName} not found`); } // find operation const mcpToolWithClient = mcpToolWithClients.find( (t) => t.mcpTools.openApiLookup[name], ); if (!mcpToolWithClient) { throw new Error(`Method ${name} not found`); } const operation = mcpToolWithClient.mcpTools.openApiLookup[name]; // execute try { const response = await mcpToolWithClient.client.executeOperation( operation, params, ); return { content: [ { type: "text", // currently this is the only type that seems to be used by mcp server text: JSON.stringify(response.data), // TODO: pass through the http status code text? }, ], }; } catch (error) { console.error("Error in tool call", error); if (error instanceof HttpClientError) { console.error( "HttpClientError encountered, returning structured error", error, ); const data = error.data?.response?.data ?? error.data ?? {}; return { content: [ { type: "text", text: JSON.stringify({ status: "error", // TODO: get this from http status code? ...(typeof data === "object" ? data : { data: data }), }), }, ], }; } throw error; } });
• index.js:100-147 (registration)

  This handler lists all available tools by iterating over the converted OpenAPI specs, generating tool names in the format 'toolName-methodName' (truncated to 64 chars), which includes 'API-batchGetFederatedAccountsActivities' if present in the RSS3 OpenAPI specs.
  server.setRequestHandler(ListToolsRequestSchema, async () => { console.error("list tools"); /** * @typedef {import("@modelcontextprotocol/sdk/types.js").Tool} Tool * @type {Tool[]} */ const tools = []; for (const mcpToolWithClient of mcpToolWithClients) { for (const [toolName, def] of Object.entries( mcpToolWithClient.mcpTools.tools, )) { for (const method of def.methods) { console.error("method", method); const toolNameWithMethod = `${toolName}-${method.name}`; const truncatedToolName = toolNameWithMethod.slice(0, 64); const trimmedDescription = method.description.split("Error")[0].trim(); tools.push({ name: truncatedToolName, description: trimmedDescription, inputSchema: { type: "object", properties: {}, }, }); } } } tools.unshift({ name: "API-get-input-schema", description: "Get the input schema for a given API. We should always use this tool to get the input schema for a given API before calling the API.", inputSchema: { type: "object", properties: { toolName: { type: "string", description: "The name of the tool to get the input schema for", }, }, }, }); console.error("tools", tools); return { tools }; });
• index.js:156-175 (schema)

  Special handler within the main tool executor that provides the input schema for any tool, including 'API-batchGetFederatedAccountsActivities', by looking up the corresponding OpenAPI method's inputSchema.
  if (name === "API-get-input-schema") { for (const mcpToolWithClient of mcpToolWithClients) { for (const [toolName, def] of Object.entries( mcpToolWithClient.mcpTools.tools, )) { for (const method of def.methods) { const toolNameWithMethod = `${toolName}-${method.name}`; const truncatedToolName = toolNameWithMethod.slice(0, 64); if (truncatedToolName === params.toolName) { return { content: [ { type: "text", text: JSON.stringify(method.inputSchema) }, ], }; } } } } throw new Error(`Method ${params.toolName} not found`); }
• index.js:78-84 (helper)

  Helper that converts OpenAPI specs to MCP tools using OpenAPIToMCPConverter and associates them with HttpClient instances, enabling dynamic tool generation and execution for APIs like batchGetFederatedAccountsActivities.
  const mcpToolWithClients = converterWithClients.map((cwc) => { const mcpTools = cwc.converter.convertToMCPTools(); return { mcpTools, client: cwc.client, }; });
• index.js:71-77 (helper)

  Helper that creates OpenAPIToMCPConverter instances paired with HttpClient for each fetched OpenAPI spec from RSS3 endpoints.
  const converterWithClients = openApiSpecs.map((o) => { const converter = new OpenAPIToMCPConverter(o.spec); return { converter, client: o.client, }; });