How to fix AI tool call hallucinations?

Use Toolcall Killer to instantly identify double-escaped JSON and missing arguments in Agent tool calls. It provides a local fix without uploading data.

Is my Agent data secure during debugging?

Yes. Toolcall Killer processes all JSON validation and schema matching inside your browser's V8 engine. No data is sent to any server.

Toolcall Killer

Stop Agent hallucinations from poisoning your downstream code.

Detect Hallucinations in AI Tool Calls

Professional OpenAI function calling debugger and LLM JSON validator. An essential Agent reliability tool for developers working with AI agents and function calling

🔒 Data never leaves your browser

Professional Grade Debugger

Paste JSON to validate

Free Limit Reached

AI tool call errors cost your API budget and momentum.

Pay $9.9 once to unlock unlimited debugging and the 'Auto-Fix' feature.

Pay $9.9 via PayPal.me

After payment, enter the activation code provided in the payment note (Code: KILLER2025)