Arcane

• MCP support

  Whether an agent can drive the product through the Model Context Protocol, and how much setup that takes.

• API quality

  Public API surface: machine-readable spec, official SDKs, documented auth, errors, rate limits and versioning.

• Documentation

  Publicly reachable docs — coverage, freshness, code samples and machine readability.

• Agent friendliness

  How readable the site is to an automated client: llms.txt, structured data, server-rendered content, crawler access.

• Pricing transparency

  Whether real prices are published, self-serve signup exists, and usage costs are knowable without a sales call.

• Changelog

  A public, dated record of what shipped and when — the clearest signal that a product is still alive.

• Marketing site structure

  Whether the site answers a buyer's questions: clear positioning, the pages that matter, and accessibility.

• Page speed

  How fast the site loads for real visitors: Chrome UX Report 75th-percentile LCP, INP and CLS, with a Lighthouse mobile run standing in where a site has too little traffic for field data.

• Operational trust

  Status page and incident history, security disclosure, compliance and data-processing documentation.

Measured, but not part of the score

Useful to know, but not a mark for or against the product — so these do not affect the ranking.