FiddlerCore vs Probe

FiddlerCore has no write-up on Specifiction yet; its figures are above.

Probe is a local HTTP/HTTPS proxy and API client for examining application traffic, editing requests and responses, creating mocks, and automating requests. It can capture traffic from phones, simulators, desktop apps, and terminal clients, then show headers, bodies, and timing. Breakpoints let users pause a request or response, change its headers or body, and continue or abort it. Map Local serves a local file or inline body for matching URLs; Map Remote forwards them to another host. Visual flows can chain requests, extract values, check results, branch, and loop, and run in the app, through REST API or MCP, or with a headless CLI. The API client supports HTTP and GraphQL, collections, environments, authentication, and history. It imports cURL or Postman and exports to Postman v2.1. Probe also includes an MCP server for compatible clients and file browsing and transfers over SFTP, FTP/FTPS, S3, and WebDAV. It is available for Android, iOS, macOS, Windows, and API use. The free plan costs nothing.