schema-sieve-mcp
Local MCP tool for understanding JSON Schema files while planning tests, summarizing types, required fields, constraints, and generating placeholder paths without copying data.
README
schema-sieve-mcp
Schema Sieve is a local MCP tool for understanding JSON Schema files while planning tests. It focuses on the part that usually takes the most time: finding required paths, nested constraints, unions, arrays, and likely sensitive fields before writing fixtures.
Tools
inspect_schema: summarize types, properties, required fields, constraints, composition, and references.plan_fixture: produce placeholder paths such as<string>,<integer>, and<string:date-time>without inventing or copying test data.
Safety
- Only local JSON files are accepted.
- Paths are bounded by
SCHEMA_SIEVE_ROOT, which defaults to the workspace parent when launched from the package. - Files are capped at 2 MB and results are bounded.
- Examples, defaults, constants, and sensitive-like property names are omitted or marked as omitted.
- This is structural guidance, not a JSON Schema validator and not a security scanner.
Run
npm install
npm run build
node dist/index.js
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