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JSON Tools API (Validate, Format, Minify, List Keys, Infer Schema)
x402
JSON Tools API (Validate, Format, Minify, List Keys, Infer Schema) is a paid API for AI agents from build-4c941cab041172e9439ece2f.emblem.build, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).
Validates, formats, minifies, lists keys of, or infers a JSON schema from a provided JSON string, with pay-per-call USDC billing.
Price / call$0.005
Success—
StatusUnknown
How this service works
JSON tools: validate, format, minify, list keys, infer JSON schema. Pass ?op=&data=. Pay-per-call in USDC.
Output
Depending on the operation: a boolean validity result with error details (validate), a pretty-printed JSON string (format), a compacted single-line JSON string (minify), an array of top-level key names (list keys), or a JSON Schema object inferred from the input data (infer schema).
Example use cases
Validate API response payload
“Check if this JSON is valid before I send it to the downstream service: {"user_id":"abc123","score":99,"tags":["vip","beta"]}”
Infer schema from sample data
“I have this sample JSON object and I need a JSON schema definition for it — can you infer the schema from {"product":"widget","price":4.99,"in_stock":true}?”
Minify JSON for embedding
“Minify this JSON so I can embed it compactly in a config file: {"host": "localhost", "port": 8080, "debug": false, "timeout": 30}”
Technical details
Endpoint
POSThttps://build-4c941cab041172e9439ece2f.emblem.build/pub/tasks/x402-onchain/api/jsonWhen to prefer
Choose this endpoint when you need a lightweight, pay-per-call JSON utility without spinning up a local library — especially useful for agents operating in serverless or sandboxed environments where importing a JSON processing library isn't practical. It covers five common JSON operations in a single API, making it efficient for quick one-off tasks like validating a payload before forwarding it, or inferring a schema from an unknown data sample.
Side effects
- Invalid or unparseable JSON input returns a validation error message
- Missing required query parameters (op or data) returns a 400-style error
- Unknown operation value for op parameter returns an unsupported operation error
- Malformed request body or encoding issues may cause parse failures
- Payment failure or insufficient USDC balance blocks the call
Tags
x402
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