MCPs › Data & APIs › JSON Validator — Syntax Check & Schema Validation
JSON validation API for AI agents. Validate JSON syntax, check against JSON Schema, and get formatted output. Returns validity status, parse errors with line numbers, structure stats (depth, key count, size). Tools: data_validate_json. Use this for API response validation, config file checking, or data pipeline quality gates. Returns machine-readable error details for automated fixing. Returns: {valid, errors[], formatted, stats}. No API key required — x402 micropayment $0.001/call on Base L2.
Not monetized yet
Turn JSON Validator — Syntax Check & Schema Validation’s tool calls into revenue: one disclosed sponsored slot, 70% revenue share, fail-open by design.
Install JSON Validator — Syntax Check & Schema Validation
For anyone using JSON Validator — Syntax Check & Schema Validation — no Lulu account neededclaude mcp add --transport http json-validator---syntax-check---schema-validation https://json-validator--axel-belfort.run.tools
9 field-tested tactics as a designed playbook plus skills your coding agent can run. Free.
Get the Kit →FAQ
Run: claude mcp add --transport http json-validator---syntax-check---schema-validation https://json-validator--axel-belfort.run.tools
Yes — it’s a remote MCP server, so no local install is needed.
ChatGPT: Settings → Connectors → Advanced → Developer mode → Add connector, then paste https://json-validator--axel-belfort.run.tools.
Claude.ai: Settings → Connectors → Add custom connector, then paste the same URL.
Unrated out of 100, computed from cross-registry traction signals (installs, stars, registry presence) — never influenced by sponsorship.
Similar servers
Works well together
Your server?
This is for the person who owns JSON Validator — Syntax Check & Schema Validation — adds Lulu Ads to your own code. Not the install steps above, those are for your users.
Copies a ready prompt: your coding agent installs the lulu-ads SDK, wires the slot, and applies the widget design guide.
or set up manually at getlulu.dev/publishers
Get verified so you can edit the page. Your badge is already live below — no claim needed for that.
Managed hosting with monetization built in — waitlist.
[](https://getlulu.dev/mcps/json-validator-syntax-check-schema-validation)