Changelog

This changelog covers changes from Monday, 2025-08-18 to Sunday, 2025-08-24.

Summary

This release includes improvements to the CLI login experience with device flow authentication and source map support for better debugging capabilities.

Features

• Enhanced CLI Authentication: The CLI now uses device flow for login, providing a more secure and user-friendly authentication experience
• Source Maps Support: Enabled source maps on public builds to improve debugging and error tracking capabilities

This release introduces significant improvements to the Zuplo CLI, rate limiting capabilities, and developer portal experience. Key highlights include a new CLI command for migrating to the redesigned developer portal, enhanced rate limiting with adaptive timeouts, and support for wildcard subdomains in CORS policies.

New Features 🎉

• New Developer Portal Migration Command - Added zuplo source migrate dev-portal CLI command to help users migrate to the new Zuplo Developer Portal built on the Zudoku framework. This simplifies the transition to the enhanced portal experience.

• Enhanced Rate Limiting with Adaptive Timeouts - The rate limiter policy now supports adaptive and configurable timeouts, providing more flexible control over API rate limiting behavior and improved performance under varying load conditions.

• CLI Project Creation - New CLI command for creating Zuplo projects directly from the command line, streamlining the project setup workflow. See the CLI documentation for usage details.

Bug Fixes 🐛

• OpenAPI Transpiler Type Handling - Fixed an issue where the OpenAPI transpiler now correctly defaults to "type: object" when properties are defined, ensuring proper schema generation and type safety.

• CLI Tunnel Command Validation - Added missing account argument validation for the create tunnel command in the Zuplo CLI, preventing errors when setting up local development tunnels.

Improvements 🔄

• Wildcard Subdomain Support for CORS - The CORS policy now supports wildcard subdomains, enabling more flexible cross-origin configurations for APIs serving multiple subdomains or multi-tenant applications.

• Enhanced SSO and MFA Security - Improved security for enterprise accounts by enforcing SSO and MFA requirements, ensuring better access control and compliance with enterprise security policies.

This release introduces enhanced debugging capabilities for MCP (Model Context Protocol) servers, implements OAuth protected resource discovery, and improves network reliability with automatic retry mechanisms. Additionally, we've fixed an issue with JWT service expiration times.

New Features 🎉

MCP Server Handler Debug Mode We've added a debug mode for MCP Server handlers, making it easier to troubleshoot and develop your Model Context Protocol integrations. This enhancement provides better visibility into MCP server operations during development and testing. Learn more about MCP in Zuplo.

OAuth Protected Resource Discovery Implemented support for OAuth RFC 9728's .well-known/oauth-protected-resource endpoint for MCP OAuth flows. This standardized endpoint enables automatic discovery of OAuth-protected resources, simplifying the integration process for MCP-enabled applications. Read our guide on introducing remote MCP servers.

Enhanced Metrics Retry and Error Handling Improved the metrics functionality to automatically retry on network errors and timeouts, providing better resilience for API calls. This enhancement is now used when sending metrics to vector, ensuring more reliable telemetry data collection even during temporary network issues.

Bug Fixes 🐛

JWT Service Expiration Time Fix Fixed an issue with JWT service expiration time handling and export options. This ensures proper token validation and prevents authentication issues related to incorrect expiration timestamps. For more information on JWT authentication, see our JWT API authentication guide.

This release introduces configurable memory sizing for the MemoryZoneReadThroughCache, improves runtime OpenAPI path handling, and fixes environment variable support for Zudoku dev portals.

New Features 🎉

• Configurable memory size for MemoryZoneReadThroughCache - The runtime's MemoryZoneReadThroughCache now supports configurable memory size limits. This enhancement provides developers with greater control over memory allocation for cached data, helping to optimize performance while avoiding out-of-memory errors in memory-constrained environments.

Bug Fixes 🐛

• Support for ZUDOKU_PUBLIC_ environment variables - Fixed an issue preventing the use of ZUDOKU_PUBLIC_ prefixed environment variables in Zudoku dev portals. These variables can now be properly exposed to the client-side for use in configuration and React components.

• Ignore non-method properties on OpenAPI operations - The runtime now properly ignores properties on OpenAPI opertations that are not methods. Perviously this could cause build errors.

This release introduces powerful JWT authentication capabilities with the new JWT service plugin and upstream policy, enhances MCP (Model Context Protocol) support with improved URL pattern handling and custom tools, improves developer portal redirect handling, and includes numerous documentation updates across our policy suite.

New Features 🎉

• JWT Service Plugin - Added a new JWT service plugin that enables advanced JWT token generation and management capabilities within Zuplo. This plugin provides developers with tools to create, sign, and manage JWT tokens directly in their API gateway workflows. Learn more about JWT authentication

• Zuplo JWT Auth Upstream Policy - Introduced a new upstream policy specifically designed for JWT authentication. This policy simplifies the process of securing backend services with JWT tokens, providing seamless integration with existing authentication systems. Read about Policy

• MCP Spec Support for 2025-06-18 - Updated MCP (Model Context Protocol) support to comply with the latest specification version 2025-06-18, ensuring compatibility with the newest features and improvements in the protocol. Explore MCP Capabilities

• Enhanced MCP Server Logging - Improved logging capabilities for MCP servers, providing better visibility into server operations and making it easier to debug and monitor MCP-based integrations. Explore MCP Capabilities

• Multi-Factor Authentication (MFA) Support - Enhanced security with new MFA configuration endpoints and login validation. This includes the ability to enforce MFA at the account level and manage MFA settings through dedicated API endpoints. Read about MFA

Bug Fixes 🐛

• MCP URL Path Pattern Unification - Fixed inconsistencies in URL path pattern handling when invoking routes on the gateway, ensuring more reliable routing for MCP-based services.

• Developer Portal Redirect Issue - Resolved an issue with developer portal redirects that was causing incorrect navigation behavior in certain scenarios. Migrating to the new Zuplo developer portal

• MCP Schema Defaults Update - Updated the default values for includeOutputSchema and includeStructuredContent to better align with common use cases and improve developer experience.

• OpenMeter Policy Fix - Resolved issues with the OpenMeter policy to ensure accurate metering and usage tracking for API monetization scenarios.

Documentation 📚

Comprehensive documentation updates were made across multiple policy configurations to improve clarity and provide better examples.

This release introduces Model Context Protocol (MCP) support for API development, new policies for query parameter manipulation and API metering, enhanced CLI commands, and improvements to console logging in the runtime.

New Features 🎉

• Query Parameter to Header Inbound Policy - New policy that allows transforming query parameters into HTTP headers, enabling more flexible request handling and backend compatibility.

• Model Context Protocol (MCP) Support - Added comprehensive MCP server handler for local editing experience with improved schema validation, URL pattern support, parameter descriptions and examples. MCP enables AI-powered tools to interact with your APIs more effectively.

• Console Logging Support in Runtime (preview) - Developers can now use console logging directly in the runtime environment, making debugging and monitoring easier during development.

• OpenMeter Metering Inbound Policy - New integration with OpenMeter for API usage metering, enabling precise tracking and billing of API consumption.

• Enhanced Prompt Injection Policy - Added "strict" mode with more granular logging capabilities to better protect APIs from prompt injection attacks in AI-powered applications.

• Improved CLI Commands:

  • New zuplo source command replaces the deprecated zuplo project command
  • Added interactive selection for account, project, and environment values in authenticated commands
  • Environment variables from public vars are now written to .env files for better local development experience