Check
"What's wrong? Is this okay?"
Diagnose a payload, a file, a config — find out what's broken before it breaks you.
A clearer way to check
Check tools turn unclear symptoms into a reviewable list of findings. They focus on the structure, timing, headers, dimensions, or configuration you provide so you can see what deserves attention before debugging the wider system.
How to use these tools
Start with a real but safely handled sample, review every finding in context, and confirm important issues against the authoritative server, schema, printer, or deployment. These tools diagnose; they do not silently change your data.
OpenTelemetry Trace Doctor
Check trace structure, timing, service identity and sensitive-data signals in static OTLP JSON.
MCP Security Doctor
Review MCP tool and server JSON for risky capabilities, broad permissions, approval gaps and sensitive data signals.
Data Contract Drift Doctor
Compare JSON release samples for consumer-breaking changes, date/value-set drift and possible path movement.
Frontend Data Exposure Doctor
Review browser-visible data placement, masked exposure findings and context-aware safer directions.
Browser Security Policy Doctor
Review CSP, HSTS and browser security headers together, with contextual findings and compatibility cautions.
Date & Time Contract Doctor
Find ambiguous timestamps, epoch-unit risks and unsafe lifecycle ordering in JSON, with safe UTC conversions.
API Payload Doctor
Paste an API request or response and get a structured diagnosis of what could go wrong with it.
JWT Time Machine
Decode a JWT and see its issued/valid/expiry claims plotted on an actual timeline.
CORS Doctor
Diagnose exactly which CORS rule is blocking a request, and why.
Print Ready Doctor
Check a photo or document against real print sizes and see exactly how sharp it will look at each one.
Schema Drift Doctor
Compare JSON or CSV samples and see where a data contract may have changed.
Environment Drift Detector
Compare environment configuration structures while keeping values masked by default.
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