OpenAPI Linter
Paste an OpenAPI or Swagger document as JSON. It catalogs every operation and flags the gaps that trip up generated clients and reviewers: missing or duplicate operationIds, undocumented endpoints, and operations with no success response. Nothing is uploaded.
Paste, then run. Findings appear here.
A preview of a Tessera pack
This browser demo runs a handful of checks client-side. The full openapi pack lints a spec into an endpoint catalog and a set of findings. It is one of 24 job packs in Tessera, an offline toolkit that turns a repository into a single reviewable HTML report.
Every pack follows one contract: normalize, validate, generate artifacts. No services, no API keys, no network calls, nothing executed against your code.
$ pip install tesserakit-openapi
$ pipx install tesserakit-openapi # isolated CLI install
$ uv tool install tesserakit-openapi
$ tessera run --input . --output run
# then open run/index.html