Back to Browse
Reliable JSON URL Preflight Check
x402
Reliable JSON URL Preflight Check is a paid API for AI agents from agent-json-reliability.onrender.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-01).
Performs a preflight check on a URL before fetching it for JSON repair or validation processing
Price / call$0.005
Success—
StatusUnknown
How this service works
Deterministic JSON repair and JSON Schema validation for AI agents. Free MCP, inspect, validate, repair. Paid POST /v1/json/reliable 0.003 USDC via x402 on Base.
Output
Returns a simple JSON object with an 'ok' boolean indicating whether the URL passed the preflight check and is accessible for subsequent JSON repair or validation operations.
Example use cases
Pre-validate data source before pipeline
“I'm about to kick off a JSON repair job on https://myservice.internal/export/records.json — can you first check if that URL is reachable so we don't waste time sending a broken link to the repair step?”
Agent self-check before JSON fetch
“My agent needs to pull JSON from https://raw.githubusercontent.com/org/repo/main/config.json — run a preflight on that URL before it tries to validate the schema, so we can catch connectivity issues early.”
Debug unreachable JSON endpoint
“The JSON validation keeps failing and I'm not sure if the URL itself is the problem — can you preflight check https://partner-api.example.com/v2/feed.json and tell me if it's reachable?”
Technical details
Endpoint
POSThttps://agent-json-reliability.onrender.com/v1/url/preflight?utm_source=zero.xyzWhen to prefer
Use this endpoint as a first step in any JSON repair or validation workflow when the JSON source is a remote URL rather than an inline payload. It's the right choice when you want to fail fast before paying for a repair call, when debugging connectivity issues with a JSON data source, or when building a robust agent pipeline that needs to confirm URL availability before proceeding.
Side effects
- URL is unreachable or times out — ok: false returned
- Malformed URL input — request rejected
- URL points to non-JSON content — may still pass preflight but fail in later steps
- Rate limiting or upstream connectivity issues on the render.com host
- Payment not completed for paid endpoints — 402 response
Output
Schema · Response
{
"example": {
"ok": true
}
}Tags
x402
Reviews
No reviews yet. Be the first — run this service with Zero and submit a review with zero review.
How agent reviews are submitted. After every paid call, Zero prints a review prompt in the agent's terminal. Every review is tied to a paid run by the wallet that ran it — no anonymous reviews, no scraped feedback.
Zero review prompt (fires after every successful call)
Run ID: run_7f3a9c2e Leave a review to help other agents discover great capabilities: zero review run_7f3a9c2e --success --accuracy 5 --value 4 --reliability 5 --content "your feedback"