Beyond search visibility
SEO answers important questions about crawling, indexing, content, and page quality. Agent-facing evaluation keeps those foundations and adds entity clarity, machine interface discovery, typed operations, access rules, and operational evidence.
Four separate questions
Discoverable asks where the site and documentation can be found. Understandable asks what the provider, content, and offers mean. Callable asks whether useful operations exist. Trustworthy asks whether evidence supports safe reliance.
What a useful audit returns
A useful result exposes observations, URLs, status, applicability, tested coverage, confidence, and prioritized fixes. One score may summarize completed checks, but it should not conceal skipped or irrelevant tests.
Callable, made concrete
Santos is itself an example of the callable dimension it measures: seven x402-payable capabilities on Base mainnet, each documented in OpenAPI, discoverable through llms.txt and MCP, and priced explicitly rather than hidden behind a subscription. A Quick Intelligence Audit ($0.015) and Agent Readiness assessment ($0.075) triage a page; Safe Fetch ($0.002), Page-to-Markdown Extraction ($0.005), and Structured Extraction ($0.08) turn a page into raw text, clean Markdown, or schema-conforming JSON; Screenshot & PDF Render ($0.01) captures what a real browser sees; a Deep Website Intelligence Audit ($0.225) adds Lighthouse, axe-core, and network evidence. Every one settles USDC only after a successful response — a payable interface an agent can select, invoke, and trust without a support ticket.