Vellium & Co

Directory › Developer tools and utilities › AgentTools

AgentTools

Validate JSON with precise error messages, pretty-print it with any indent, and inspect its top-level type and element counts. Use this when an agent needs to validate, pretty-print and inspect JSON.

Go to this service →

Our latest check (2026-10-11)

Answering
Yes — valid x402 payment terms
Time to answer
117 ms
Price
$0.002 per call
Paying buyers, last 30 days
3 (directory's own records)
Paid calls, last 30 days
6
Category
Developer tools and utilities
Address
https://agenttools-hub.vercel.app/api/v1/dev/json-formatter

Accuracy: paid answers checked against an independent record

Not yet in our paid checks. A seller we have not checked has neither passed nor failed.

For agents

This page as JSON: /sellers/8c026d3b1568.json. Paid lookup by address: GET /api/seller?resource=… ($0.001, x402).

Sellers can see the evidence behind their checks and ask for a re-check at [email protected].