GoLogin MCP

Instructions

Implementation Reference

• src/index.ts:454-570 (handler)

  The dynamic handler that implements all generated tools, including 'put_profile__id__custom'. It matches the tool name to an OpenAPI operation using the specific name generation logic (with 'browser' to 'profile' replacement and path normalization), constructs the request parameters, and performs the HTTP PUT request to the corresponding GoLogin API endpoint.
  private async callDynamicTool( toolName: string, parameters: CallParameters = {}, headers: Record<string, string> = {} ): Promise<CallToolResult> { console.log('parameters', parameters.body); if (!this.apiSpec || !this.apiSpec.paths) { throw new Error('API specification not loaded'); } let targetPath = ''; let targetMethod = ''; let operation: OpenAPIV3.OperationObject | undefined; for (const [path, pathItem] of Object.entries(this.apiSpec.paths)) { if (!pathItem) continue; for (const [method, op] of Object.entries(pathItem)) { if (['get', 'post', 'put', 'delete', 'patch', 'head', 'options'].includes(method) && op) { const opObj = op as OpenAPIV3.OperationObject; const generatedToolName = `${method}${path.replace('browser', 'profile').replace(/[^a-zA-Z0-9]/g, '_')}`; if (generatedToolName === toolName) { targetPath = path; targetMethod = method.toUpperCase(); operation = opObj; break; } } } if (operation) break; } if (!operation) { throw new Error(`Tool "${toolName}" not found`); } let url = `${this.baseUrl}${targetPath}`; const requestHeaders: Record<string, string> = { ...headers }; let requestBody: string | undefined; requestHeaders['User-Agent'] = 'gologin-mcp'; console.error('this.token', this.token); if (this.token) { requestHeaders['Authorization'] = `Bearer ${this.token}`; } if (parameters.path) { for (const [key, value] of Object.entries(parameters.path)) { url = url.replace(`{${key}}`, encodeURIComponent(value)); } } const queryParams = new URLSearchParams(); if (parameters.query) { for (const [key, value] of Object.entries(parameters.query)) { if (value) { queryParams.append(key, value); } } } if (queryParams.toString()) { url += `?${queryParams.toString()}`; } if (parameters.body && ['POST', 'PUT', 'PATCH', 'DELETE'].includes(targetMethod)) { requestHeaders['Content-Type'] = 'application/json'; requestBody = JSON.stringify(parameters.body); } console.log('requestBody', requestBody); try { const fetchOptions: RequestInit = { method: targetMethod, headers: requestHeaders, }; console.error('fetchOptions', fetchOptions); if (requestBody) { fetchOptions.body = requestBody; } const response = await fetch(url, fetchOptions); const responseHeaders: Record<string, string> = {}; response.headers.forEach((value, key) => { responseHeaders[key] = value; }); let responseBody: any; const contentType = response.headers.get('content-type') || ''; if (contentType.includes('application/json')) { try { responseBody = await response.json(); } catch { responseBody = await response.text(); } } else { responseBody = await response.text(); } return { content: [ { type: 'text', text: `API Call Result:\n` + `URL: ${url}\n` + `Method: ${targetMethod}\n` + `Status: ${response.status} ${response.statusText}\n\n` + `Response Headers:\n${JSON.stringify(responseHeaders, null, 2)}\n\n` + `Response Body:\n${typeof responseBody === 'object' ? JSON.stringify(responseBody, null, 2) : responseBody}`, }, ], }; } catch (error) { throw new Error(`API call failed: ${error instanceof Error ? error.message : String(error)}`); } }
• src/index.ts:47-71 (registration)

  Registers the 'put_profile__id__custom' tool dynamically by generating its name from OpenAPI paths (replacing 'browser' with 'profile' and normalizing slashes to underscores) and listing it in the tools response.
  this.server.setRequestHandler(ListToolsRequestSchema, async () => { const tools: Tool[] = []; if (this.apiSpec && this.apiSpec.paths) { for (const [path, pathItem] of Object.entries(this.apiSpec.paths)) { if (!pathItem) continue; for (const [method, operation] of Object.entries(pathItem)) { if (['get', 'post', 'put', 'delete', 'patch', 'head', 'options'].includes(method) && operation) { const op = operation as OpenAPIV3.OperationObject; const toolName = `${method}${path.replace('browser', 'profile').replace(/[^a-zA-Z0-9]/g, '_')}`; const inputSchema = this.buildInputSchema(op, path); tools.push({ name: toolName, description: op.summary || op.description || `${method.toUpperCase()} ${path}`, inputSchema, }); } } } } return { tools }; });
• src/index.ts:204-249 (schema)

  Generates the input schema for the dynamic tool 'put_profile__id__custom' by combining path parameters (e.g., 'id'), query parameters, and request body schema from the corresponding OpenAPI PUT operation.
  private buildInputSchema(operation: OpenAPIV3.OperationObject, path: string): any { const properties: any = {}; const required: string[] = []; const pathParams = this.extractPathParameters(operation, path); const queryParams = this.extractQueryParameters(operation); const bodySchema = this.extractRequestBodySchema(operation); if (pathParams.properties && Object.keys(pathParams.properties).length > 0) { for (const [key, prop] of Object.entries(pathParams.properties)) { properties[key] = this.convertOpenAPISchemaToJsonSchema(prop as OpenAPIV3.SchemaObject | OpenAPIV3.ReferenceObject); if (pathParams.required.includes(key)) { required.push(key); } } } if (queryParams.properties && Object.keys(queryParams.properties).length > 0) { for (const [key, prop] of Object.entries(queryParams.properties)) { properties[key] = this.convertOpenAPISchemaToJsonSchema(prop as OpenAPIV3.SchemaObject | OpenAPIV3.ReferenceObject); if (queryParams.required.includes(key)) { required.push(key); } } } if (bodySchema && bodySchema.properties) { for (const [key, prop] of Object.entries(bodySchema.properties)) { properties[key] = this.convertOpenAPISchemaToJsonSchema(prop as OpenAPIV3.SchemaObject | OpenAPIV3.ReferenceObject); if (bodySchema.required && bodySchema.required.includes(key)) { required.push(key); } } } const schema: any = { type: 'object', properties, }; if (required.length > 0) { schema.required = required; } return schema; }
• src/index.ts:96-175 (helper)

  Helper that parses tool arguments into path/query/body parameters by matching the tool name to OpenAPI operation and mapping args accordingly, crucial for handling 'put_profile__id__custom' inputs.
  private extractParametersFromArgs(toolName: string, args: Record<string, any>): CallParameters { if (!this.apiSpec || !this.apiSpec.paths) { return { body: args }; } let operation: OpenAPIV3.OperationObject | undefined; let path = ''; for (const [apiPath, pathItem] of Object.entries(this.apiSpec.paths)) { if (!pathItem) continue; for (const [method, op] of Object.entries(pathItem)) { if (['get', 'post', 'put', 'delete', 'patch', 'head', 'options'].includes(method) && op) { const opObj = op as OpenAPIV3.OperationObject; const generatedToolName = opObj.operationId || `${method}_${apiPath.replace(/[^a-zA-Z0-9]/g, '_')}`; if (generatedToolName === toolName) { operation = opObj; path = apiPath; break; } } } if (operation) break; } if (!operation) { return { body: args }; } const pathParams: Record<string, string> = {}; const queryParams: Record<string, string> = {}; const bodyParams: any = {}; const pathParamNames = path.match(/\{([^}]+)\}/g)?.map(p => p.slice(1, -1)) || []; if (operation.parameters) { operation.parameters.forEach(param => { if ('$ref' in param) return; const parameter = param as OpenAPIV3.ParameterObject; const paramName = parameter.name; if (parameter.in === 'path' && args[paramName] !== undefined) { pathParams[paramName] = String(args[paramName]); } else if (parameter.in === 'query' && args[paramName] !== undefined) { queryParams[paramName] = String(args[paramName]); } }); } pathParamNames.forEach(paramName => { if (args[paramName] !== undefined && !pathParams[paramName]) { pathParams[paramName] = String(args[paramName]); } }); const usedParams = new Set([...Object.keys(pathParams), ...Object.keys(queryParams)]); for (const [key, value] of Object.entries(args)) { if (!usedParams.has(key)) { bodyParams[key] = value; } } const parameters: CallParameters = {}; if (Object.keys(pathParams).length > 0) { parameters.path = pathParams; } if (Object.keys(queryParams).length > 0) { parameters.query = queryParams; } if (Object.keys(bodyParams).length > 0) { parameters.body = bodyParams; } return parameters; }
• src/index.ts:73-94 (helper)

  The MCP CallTool request handler that dispatches to the dynamic implementation for tools like 'put_profile__id__custom'.
  this.server.setRequestHandler(CallToolRequestSchema, async (request: any): Promise<CallToolResult> => { const { name, arguments: args } = request.params; if (!args) { throw new Error('No arguments provided'); } console.log('args', args); try { const parameters: CallParameters = this.extractParametersFromArgs(name, args); return await this.callDynamicTool(name, parameters, args.headers as Record<string, string> | undefined); } catch (error) { return { content: [ { type: 'text', text: `Error: ${error instanceof Error ? error.message : String(error)}`, }, ], }; } }); }