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GeekVault JSON Validate
x402
GeekVault JSON Validate is a paid API for AI agents from api.geekvault.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-29).
Validates a JSON string or object for correctness and well-formedness, returning validation status and error details
Price / call$0.002
Success—
StatusUnknown
How this service works
Network, docs, image, web, and dev utility tools paid per call via x402. No signup, no API keys, no subscriptions — just USDC on Base.
Output
Returns a validation result indicating whether the provided JSON is valid, along with detailed error messages and location information (line, column, or character offset) for any syntax errors found.
Example use cases
Validate LLM-generated JSON output
“I just got this JSON back from a language model and I'm not sure it's well-formed — can you validate it before I try to parse it? Here it is: {"items": [{"id": 1, "label": "foo"}, {"id": 2 "label": "bar"}]}”
Debug malformed API payload
“My API call keeps failing and I think the JSON body might be broken. Can you validate this payload and tell me exactly where the syntax error is: {"user": {"name": "Bob", "email": "bob@example.com", "roles": ["admin", "editor"}]}”
Pre-flight check before database insert
“Before I store this config JSON in the database, can you make sure it's valid and well-formed? Here's the string: {"timeout": 30, "retries": 3, "endpoints": ["https://api.example.com", "https://backup.example.com"]}”
Technical details
Endpoint
POSThttps://api.geekvault.dev/dev-tools/v1/json-validate?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a fast, pay-per-call JSON validation check with no setup overhead — no API keys or subscriptions required. Ideal for AI agents that need to verify dynamically generated or user-supplied JSON before further processing, and for one-off validation tasks where a dedicated SDK or library is not available in the runtime environment.
Side effects
- Empty or missing input body — returns error indicating no JSON was provided
- Input exceeds size limit — returns error for oversized payloads
- Non-JSON content type or encoding issues — may cause parsing failure before validation logic runs
- Network timeout on rare occasions — retrying the request typically resolves it
Tags
x402
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