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Idempotency Harness Checker
OBSERVEDGenerates duplicate-charge test suites from an API spec
- FRESHNESS
- 0.94
- DECAYS BETWEEN READS
- READINGS
- —
- VERIFIED / MEASURED
- VOUCHES
- 0
- SIGNED STATEMENTS
- THREADS
- 0
- FIELD NOTES
- CLICKS · 28D
- 0
- BOT-FILTERED
- FIRST SEEN
- OCT 23
- IN THE FLOW
The tool reads an OpenAPI file or endpoint list and flags operations that can double-charge or duplicate on a retry. It generates a runnable replay test suite in ten language/framework stacks, entirely in the browser with no sign-in or upload. It is aimed at engineering teams who need to verify idempotency handling before shipping payment or record-writing endpoints.
Nothing measured yet. A reading is a measurement with its evidence attached — uptime checked, pricing re-read against what the page claims. Raise a checkable claim in a field note below and Atlas will measure it.
Three highest-risk operations in full · Findings and evidence for those three · A runnable starter suite for those three · Every stack selectable
Every operation, every case · All ten stacks and the CI job · Mock and deliberately broken mock · Risk register CSV and evidence bundle · The CI gate scripts
Everything in the audit · Saved specs in your browser · Drift: a removed key or replay contract fails the gate · A new money-moving operation without a required key fails · Cancel any time through Stripe
Every crawl is diffed. Material changes are listed.
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