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Servirtium
What it is
Servirtium is open-source software for recording HTTP conversations made during tests and replaying them offline without contacting the real service. It uses file-based Markdown tapes that can show requests, responses, headers and bodies, allowing teams to share recordings across languages and review changes in Git diffs. A native record-and-replay engine has bindings for Go, Python, Java, .NET, Rust, Ruby, JavaScript and TypeScript, Dart, PHP, Haskell, Elixir, Pharo, Nim, Zig, Lua, Erlang and Gleam. The project is agnostic about test-runner choice and works with unit-test or specification frameworks. Its standalone CLI can serve tapes as live HTTP stubs, lint them, and import or export HTTP Archive files. Converters include Chrome DevTools, Fiddler, Charles, mitmproxy and Postman captures. Redaction and whole-tape normalization address changing IDs and timestamps. Playback requires matching request headers and bodies, with masking options for transient values. It runs through API, Linux, macOS and self-hosted environments.
For and against
For
- Offline playback avoids live service calls
- Readable Markdown tapes support Git review
- Bindings cover many programming languages
- CLI provides HTTP stubs and HAR conversion
- Redaction handles transient values
Against
- Playback fails when headers or bodies differ
- Focused on HTTP test automation
- No hosted SaaS endpoint
The verdict
Servirtium offers a shareable, file-based way to record and replay HTTP interactions across languages. Teams should plan request matching and masking carefully when recorded values change.
Who it suits
It suits teams consuming vendor web APIs and API vendors sharing example scenarios. It is focused on HTTP test automation, not production service virtualization.
On the record
- Audience
- The site describes it for teams consuming vendor web APIs and vendors shipping example usages.servirtium.dev · read 8 Oct 2026
- CI and API drift
- The site describes using tape changes and Git diffs to identify API compatibility changes in CI or code review.servirtium.dev · read 8 Oct 2026
- CLI
- A standalone CLI can serve tapes as a live HTTP stub, lint tapes, and import or export HTTP Archive files.servirtium.dev · read 8 Oct 2026
- Deployment model
- The project describes Servirtium as an in-process testing library with file-based tapes and a standalone CLI, rather than a hosted SaaS endpoint.github.com · read 8 Oct 2026
- Engine and bindings
- The current project describes one native engine with language bindings, including Go, Python, Java, .NET, Rust, Ruby, JavaScript and TypeScript, Dart, PHP, Haskell, Elixir, Pharo, Nim, Zig, Lua, Erlang and Gleam.servirtium.dev · read 8 Oct 2026
- HAR integrations
- The CLI imports and exports HTTP Archive files and names Chrome DevTools, Fiddler, Charles, mitmproxy, and Postman as sources or tools.servirtium.dev · read 8 Oct 2026
- Integrations
- The HAR bridge names Chrome DevTools, Fiddler, Charles, mitmproxy and Postman as sources of captures it can convert.servirtium.dev · read 8 Oct 2026
- Notable limit
- The site says Servirtium is focused on HTTP and is used for test automation, with production deployments connecting to real services.servirtium.dev · read 8 Oct 2026
- Offline playback
- Playback uses saved Markdown recordings, so tests can run without calling the real service.servirtium.dev · read 8 Oct 2026
- Playback matching
- Playback fails when request headers or bodies differ from the recording, and the site describes optional masking and redaction for transient data.servirtium.dev · read 8 Oct 2026
- Pricing and support
- The opened maker pages provide no product pricing, trial terms or support offer.servirtium.dev · read 8 Oct 2026
- Production use
- The site describes Servirtium as exclusively for test automation and says production deployments connect to the real services.servirtium.dev · read 8 Oct 2026
- Purpose
- Servirtium records HTTP conversations from tests and replays them offline without calling the real service.servirtium.dev · read 8 Oct 2026
- Redaction
- The shared engine includes redaction and whole-tape normalization features for handling values such as transient IDs and timestamps.servirtium.dev · read 8 Oct 2026
- Release history
- The site says the Servirtium beta, with Markdown record/playback syntax, a Java library, and examples, was released in autumn 2019.servirtium.dev · read 8 Oct 2026
- Request matching
- Playback fails when the request headers or body differ from the recorded interaction; the site recommends deliberate masking or redaction for transient values.servirtium.dev · read 8 Oct 2026
- Security and compliance
- The opened product pages describe redaction features but make no security certification or compliance claims.servirtium.dev · read 8 Oct 2026
- Shared engine
- The current VCR project uses one native record/replay engine with language bindings, and the site lists seventeen bindings.servirtium.dev · read 8 Oct 2026
