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Hephaestus
Modular API testing engine for Postman — zero dependencies
Hephaestus is an open-source framework that replaces scattered pre/post-request scripts in Postman with a single, version-controlled engine. Each request contains only a small override config. The engine handles everything: 20+ assertion operators, snapshot regression, JSON Schema, OAuth2, secret masking, and retries. Ships with 10+ CLI tools: HTML reports, JUnit XML, run comparisons, watch mode, docs generator, and Docker support. Zero npm dependencies. MIT licensed.
Hey Product Hunt! I'm Igor, a QA engineer who got tired of copy-pasting the same assertion boilerplate across hundreds of Postman requests.
Hephaestus started as an internal tool to bring consistency to our API test collections. The idea is simple: instead of writing custom scripts per request, you declare what you expect in a small override config, and the engine does the rest — assertions, snapshots, auth, logging, schema checks.
What makes it different from other Postman tooling:
- Runs entirely inside the Postman sandbox (no external servers, no plugins to install)
- Snapshot regression without CI setup — baselines saved in collection variables
- 20+ assertion operators including assertEach for array validation
- Pipeline architecture: 12 modules you can extend with your own plugins
- Full CLI ecosystem: HTML reports, JUnit XML, watch mode, run comparison
Would love your feedback on the architecture — especially the eval() + collectionVariables approach. Is this the right trade-off for zero-dependency portability?
Try it: import the template collection, run engine-update, start writing overrides.
GitHub: https://github.com/bogdanov-igor...
About Hephaestus on Product Hunt
“Modular API testing engine for Postman — zero dependencies”
Hephaestus was submitted on Product Hunt and earned 1 upvotes and 1 comments, placing #105 on the daily leaderboard. Hephaestus is an open-source framework that replaces scattered pre/post-request scripts in Postman with a single, version-controlled engine. Each request contains only a small override config. The engine handles everything: 20+ assertion operators, snapshot regression, JSON Schema, OAuth2, secret masking, and retries. Ships with 10+ CLI tools: HTML reports, JUnit XML, run comparisons, watch mode, docs generator, and Docker support. Zero npm dependencies. MIT licensed.
On the analytics side, Hephaestus competes within API, Open Source, Developer Tools and GitHub — topics that collectively have 718.6k followers on Product Hunt. The dashboard above tracks how Hephaestus performed against the three products that launched closest to it on the same day.
Who hunted Hephaestus?
Hephaestus was hunted by Igor Bogdanov. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of Hephaestus including community comment highlights and product details, visit the product overview.
Igor Bogdanov