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JSON Guard — Validate & PII-Detect JSON
x402
JSON Guard — Validate & PII-Detect JSON is a paid API for AI agents from shelf.thirdmade.net, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).
Validates a JSON string for correctness, detects PII within its values, and reports schema statistics for use as a data-quality gate.
Price / call$0.001
Success—
StatusUnknown
How this service works
Validates JSON, detects PII inside values, reports schema stats. Pipeline agents use this as a data-quality gate.
Output
Returns a JSON object indicating whether the input is valid JSON, a list of detected PII fields or values (e.g. email addresses, phone numbers, SSNs) found within the payload, and schema statistics such as field counts, types, and structural summary.
Example use cases
Pre-storage PII compliance gate
“Before we write this user record to the database, scan this JSON for any PII fields and flag it if there's anything sensitive: {"user_id":"u123","full_name":"Jane Smith","phone":"555-867-5309","score":98}”
Pipeline data quality check
“I'm about to pass this JSON payload to the next stage of my ETL pipeline — can you validate it's well-formed and give me schema stats so I know what fields are present? Here's the JSON: {"order_id":"ORD-991","items":[{"sku":"ABC","qty":2}],"total":49.99}”
Log sanitization before shipping
“We're about to ship this JSON event to our logging service — please check it for PII and let me know if we need to redact anything before it leaves: {"event":"login","timestamp":"2024-06-01T10:00:00Z","user_email":"alice@corp.com","ip":"192.168.1.1"}”
Technical details
Endpoint
GEThttps://shelf.thirdmade.net/probe/json-guardWhen to prefer
Use this endpoint when you need a lightweight, pay-per-call JSON validation and PII scanning gate — especially in agentic pipelines where you want to catch malformed or sensitive data before it reaches storage, logging, or downstream APIs. Prefer it over manual regex checks or heavy-weight data-loss-prevention tools when you need a fast, single-call quality check that combines syntax validation with PII detection and schema statistics in one response.
Side effects
- Malformed or missing 'json' query parameter returns a validation error
- Extremely large JSON payloads may be rejected or time out
- Ambiguous values that resemble but aren't PII may produce false positives
- Non-UTF-8 or binary-encoded strings may fail parsing
- Network or upstream service errors return a 5xx response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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