Fiddler Everywhere Releases

TelerikDebugging & Testing Tools
Version 8.0.2 (Jul 31, 2026)

Learn what's new across releases, with details of features, enhancements, and resolved issues.

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Fiddler Everywhere v8.0.2Jul 31, 2026
Features
  • Set the MCP server name to Fiddler for improved client integration and discoverability.
  • Updated the list of supported OpenAI models available in Debugging Assistant integrations.
Fiddler Everywhere v8.0.1Major versionJul 24, 2026
Features
  • Added a new Agent Inspector for viewing agent messages, tool calls, model details, cost, and latency.
  • Added caching recommendations for Agent Cache to help reduce latency and token usage for expensive agent calls.
  • Added an MCP traffic capture tool that automatically captures traffic only from applications launched from the current terminal session.
  • Added one-click MCP setup for supported IDEs and coding agents, making it easier to connect Fiddler without manual configuration.
  • Added a new Protobuf inspector.
  • Updated the MCP Setup Skill.
  • Updated the MCP core library.
  • Updated the list of models supported in the Debugging Assistant setup.
  • Included updates for Windows Network Driver.
  • Updated third-party dependencies to mitigate potential security vulnerabilities.
Fiddler Everywhere v7.8.0May 29, 2026
Features
  • Exposed caching of agent calls through the Fiddler MCP.
  • Updated the list of available models in Assistant settings tab.
  • Updated third-party dependencies to mitigate potential security vulnerabilities.
Fixes
  • Fixed issue where MCP get_sessions_details returns compressed body when sanitization is used.
  • Fixed issue where requests to bedrock-runtime are not displayed in Agent Calls tab.
  • Fixed issue where certificate errors are shown in application logs when certificate is trusted.
  • Fixed issue after using Add to Snapshot where the Streaming messages are not visible.
  • Fixed issue where SingalR lost connection leads to multiple unexpected errors.
  • Fixed issue where mark session in Copper color doesn't work.
Fiddler Everywhere v7.7.3Apr 16, 2026
Fixes
  • Fixed issue where the MCP get_sessions tool is failing with agents that require object-root structured responses.
  • Fixed issue where the MCP tool get_session_details does not properly return request and response bodies for POST requests.
Fiddler Everywhere v7.7.2Mar 26, 2026
Features
  • Introduced a new API endpoint for MCP API key generation.
Fixes
  • The empty state of the Agent Calls tab did not provide clear guidance.
Fiddler Everywhere v7.7.1Mar 18, 2026
Features
  • Updated third-party dependencies to mitigate potential security vulnerabilities.
Fixes
  • Fixed issue where the returned comment from the Agent Cache response shows the wrong origin session ID.
Fiddler Everywhere v7.7.0Mar 12, 2026
Features
  • Introduced Agent Cache functionality, enabling users to capture and selectively cache real Agent request/response pairs.
  • Upgraded the application's core backend runtime to the latest supported version.
  • Updated third-party dependencies to mitigate potential security vulnerabilities.
Fixes
  • Autosave could not be disabled when there is quota limiting the functionality.
  • Debugging Assistant continued to function after the Fiddler Everywhere trial had expired.
  • Email addresses were duplicated when separated by spaces in Share dialogs.
Fiddler Everywhere v7.6.0Jan 20, 2026
Features
  • Upgraded the application's core frontend technologies and UI component libraries to latest supported versions.
  • Updated third-party dependencies to mitigate potential security vulnerabilities.
Fixes
  • Fixed issue where JSON format and tables are not displayed correctly in Debugging Assistant.