- name
- datagate
- description
- Validate JSON data against a JSON Schema (Draft 2020-12). Post a schema and payload, get back whether it's valid plus detailed error paths and messages for every violation. Language-agnostic validation gate for multi-agent pipelines.
- metadata
- {"openclaw":{"emoji":"✅","requires":{"bins":["python"]},"install":[{"id":"pip","kind":"uv","packages":["fastapi","uvicorn","pydantic","jsonschema"]}]}}
DataGate
Validate any JSON payload against a JSON Schema.
Start the server
uvicorn datagate.app:app --port 8004Validate data
curl -s -X POST http://localhost:8004/v1/validate \
-H "Content-Type: application/json" \
-d '{
"json_schema": {
"type": "object",
"properties": {"name": {"type": "string"}, "age": {"type": "integer", "minimum": 0}},
"required": ["name", "age"]
},
"payload": {"name": "Alice", "age": 30}
}' | jqReturns valid (true/false), error_count, and errors (each with path pointing to the exact field and message explaining the violation).
Handles invalid schemas too
If you send a broken schema, DataGate catches it and returns an error pointing to $schema with a clear message. No crashes.
Use case
Agents passing data between services can validate payloads before sending. Non-Python agents get Pydantic-grade validation via a simple API call.