# Services from billitright.co on Zero

> billitright.co serves 6 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/billitright.co
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/billitright.co/health.json

## Services

- [BillItRight CASA Transport Security Assessment](https://www.zero.xyz/c/billitright-casa-transport-security-assessment-b88fa8e8/llms.txt): $0.01/call via x402. Performs a CASA cybersecurity assessment of TLS/transport security for a target URL, checking certificate validity, hostname matching, protocol/cipher strength, forward secrecy, and TLS vulnerabilities.
- [billitright.co CASA Performance Validation](https://www.zero.xyz/c/billitright-co-casa-performance-validation-09f22f8d/llms.txt): $0.025/call via x402. Runs a CASA Cybersecurity Assessment performance validation that tests a target endpoint for availability, responsiveness, and stability under normal load, sustained traffic, and request surges.
- [billitright.co CASA Cybersecurity Full Assessment Runner](https://www.zero.xyz/c/billitright-co-casa-cybersecurity-full-assessment-runner-3c52ca35/llms.txt): $0.15/call via x402. Runs a comprehensive CASA cybersecurity assessment combining functional compliance, performance validation, web security findings, and transport security checks against a target URL.
- [BillitRight CASA Web Security Findings Assessment](https://www.zero.xyz/c/billitright-casa-web-security-findings-assessment-aa409f3c/llms.txt): $0.025/call via x402. Evaluates web-layer security hardening of a target URL, checking HTTP headers, caching policies, browser protections, resource policies, and response exposure.
- [BillItRight CASA Functional Compliance Assessment](https://www.zero.xyz/c/billitright-casa-functional-compliance-assessment-3bdb68d2/llms.txt): $0.075/call via x402. Evaluates whether a service correctly follows UCP and AP2 protocols across identity, negotiation, validation, transaction, and business rules using evidence from discovery, authorization, checkout integrity, state transitions, and request validation.
- [billitright.co CASA Infrastructure Assessment](https://www.zero.xyz/c/billitright-co-casa-infrastructure-assessment-af5ac43f/llms.txt): $0.06/call via x402. Runs a CASA cybersecurity infrastructure assessment against a target URL, evaluating transport configuration, web surface hardening, and service behavior under load to determine if it meets baseline security and performance standards.

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)