Google tells you what exists. Faceabot tells you what holds up.
Check websites against the W3C Web Sustainability Guidelines and look up the guidelines
Package npm :@sustainablewebsites/wsg-check · website · measurements and detailsCheck whether text is valid JSON. The body is discarded.
MCP endpoint :https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/json-check/mcp · website · measurements and detailsCUID shape check
MCP endpoint :https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/cuid-shape/mcp · website · measurements and detailsKSUID shape check
MCP endpoint :https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/ksuid-shape/mcp · website · measurements and detailsLeap year check
MCP endpoint :https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/leap-year/mcp · website · measurements and detailsPunycode host check
MCP endpoint :https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/punycode-ok/mcp · website · measurements and detailsSlug character check
MCP endpoint :https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/slug-ok/mcp · website · measurements and detailsTypeID shape check
MCP endpoint :https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/typeid-shape/mcp · website · measurements and detailsULID shape check
MCP endpoint :https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/ulid-shape/mcp · website · measurements and detailsUUID shape check
MCP endpoint :https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/uuid-shape/mcp · website · measurements and detailsXID shape check
MCP endpoint :https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/xid-shape/mcp · website · measurements and detailsPre-payment merchant trust checks for x402 agents on Base and Solana.
MCP endpoint :https://mcp.gradientdecisions.com/mcp · website · measurements and detailsDocument reasoning checks: a helicopter view of claims and assumptions before handoff.
MCP endpoint :https://www.hirebestie.com/api/check/mcp · website · measurements and detailsFree brand-name Clearance Checks from live registries; connect a plan (API key) for full checks.
MCP endpoint :https://nombrio.com/api/mcp · website · measurements and detailsPremium agentic endpoint for bulletproofs-range-check-mcp.
MCP endpoint :https://api.m2mcent.com/bulletproofs-range-check-mcp/sse · measurements and detailsUPC-A check-digit shape, value discarded
MCP endpoint :https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/upc-check/mcp · website · measurements and detailsRun EPUBCheck for EPUB specification errors and compare two exports.
MCP endpoint :https://powmcp.com/epub-check/mcp · website · measurements and detailsSafe header name check
MCP endpoint :https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/header-safe/mcp · website · measurements and detailsNano ID shape check
MCP endpoint :https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/nanoid-shape/mcp · website · measurements and detailsWebsite facts for agents: HTTPS/certificate checks, public site info, small local-business search.
MCP endpoint :https://weio.ai/mcp · website · measurements and detailsAI agents: all of this is available without keys over MCP https://faceabot.com/api/mcp · HTTP https://faceabot.com/api/catalog?q=… · Guide : llms.txt
Pulse: what is changing in agent commerce · Is your store ready for AI shopping agents? · State of MCP (weekly) · MCP server doctor · Open reliability data · Add Faceabot to your AI · Help · Privacy · Terms