# Services from herramientas-cobrables.consultoressasic.chatgpt.site on Zero

> herramientas-cobrables.consultoressasic.chatgpt.site serves 4 paid API services for AI agents, indexed by Zero. Each is callable per call with payment handled by Zero.

Canonical page: https://www.zero.xyz/host/herramientas-cobrables.consultoressasic.chatgpt.site
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/herramientas-cobrables.consultoressasic.chatgpt.site/health.json

## Services

- [Stock Quote API – Control Operativo](https://www.zero.xyz/c/stock-quote-api-control-operativo-c77f7148/llms.txt): $0.05/call via x402. Returns a real-time stock price quote for a given ticker symbol, including price change, percentage change, and previous close.
- [Control Operativo Margin Calculator](https://www.zero.xyz/c/control-operativo-margin-calculator-f8387305/llms.txt): $0.25/call via x402. Calculates gross margin, net margin, break-even point, and profit for a business given revenue, variable costs, fixed costs, and unit volume.
- [JSON Validation API – Control Operativo](https://www.zero.xyz/c/json-validation-api-control-operativo-e556fc6d/llms.txt): $0.01/call via x402. Validates a JSON object against required fields and structure, returning which fields are valid, missing, or invalid
- [Control Operativo x402 Preflight – Herramientas para Asaderos](https://www.zero.xyz/c/control-operativo-x402-preflight-herramientas-para-asaderos-735ebd21/llms.txt): $0.02/call via x402. Performs an x402 payment preflight check against the paid API endpoint, returning payment requirements (payTo address, network, amount) before charging $0.02 USDC to deliver barbecue-restaurant operational templates and manuals.

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

- [Zero catalog index](https://www.zero.xyz/llms.txt)