# Validator Master > Provider-neutral behavioral evaluation infrastructure that applies the versioned Heartcode Protocol to observable AI responses and returns structured evidence with explicit scope and validity limitations. - Public demo: https://demo.heartcodeprotocol.org/ - Heartcode Protocol: https://github.com/heartcodeprotocol/heartcode-protocol - OpenAPI: https://api.heartcodeprotocol.org/openapi.json - Security: https://api.heartcodeprotocol.org/.well-known/security.txt ## Canonical documentation - [Validator Master](https://api.heartcodeprotocol.org/docs/validator-master): Provider-neutral behavioral evaluation infrastructure that applies the versioned Heartcode Protocol to observable AI responses and returns structured evidence. - [Validator Master Quickstart](https://api.heartcodeprotocol.org/docs/quickstart): Minimal agent-oriented path for evaluating an existing response or invoking the bounded public provider-backed evaluation API. - [Heartcode Methodology and Evidence](https://api.heartcodeprotocol.org/docs/methodology): How Validator Master evaluates observable response behavior and what the resulting evidence can and cannot establish. - [Validator Master Public API](https://api.heartcodeprotocol.org/docs/api): Machine-readable overview of the current public evaluation endpoints and their operational boundaries. - [Validator Master Limitations, Privacy, and Claim Boundaries](https://api.heartcodeprotocol.org/docs/limitations): Explicit limits on what Validator Master evidence establishes and how public-alpha requests should be handled. - [Validator Master MCP Status](https://api.heartcodeprotocol.org/docs/mcp): Current Model Context Protocol capability and the boundary between local stdio tooling and future hosted agent transport. ## Current contracts - Direct response evaluation: 1.0.0; scope response_text_only - Provider-backed public evaluation: 1.0.0; providers openai, ollama, gemini, anthropic, xai, nvidia - Arena: 1.0.0; 2-5 providers from openai, anthropic, google, xai, nvidia ## Important boundary Scores are scoped behavioral-evaluation evidence. They do not prove universal correctness, factual truth, legal compliance, or total AI safety.