What we tested
Probed live on 23 Aug 2026 against rubric v1. 4 of 5 checks passed.
PROBE-VERIFIEDtier 2 of 3
✓Markdown negotiationAccept: text/markdown
✓Markdown twin at a predictable URL/page.md
✓llms.txt/llms.txt
—API catalogRFC 9727
✓MCP server answers/.well-known/mcp/server-card.json → tools/list
What its MCP server offers
We connected, ran tools/list, and recorded what came back on 23 Aug 2026. 3 tools, served from vayu-786467d1.main-kill-isr.mintlify.me — the standard set for sites on mintlify.
search_vayu_docsquery_docs_filesystem_vayu_docssubmit_feedback
What an agent could do here
Read from the page’s own content, with the wording each was drawn from. Inference is kept separate from tested facts — an agent completing the action is tier 3.
UNVERIFIED
query_api“simple RESTful API integration”https://guide.withvayu.com/api-reference/pages/connecting-to-vayu
Context
6 sites in the index share the category billing platform, of which 1 are transactional.
How we grade
Three tiers. Every listing shows which one it has reached, and when. The rubric.
tier 1Declared
The site says agents are welcome in its robots.txt. A permission, not a capability.
tier 2Probe-verified
We fetched the site and tested each signal ourselves. Dated, repeatable, re-checked on a schedule.
tier 3Behaviourally verified
An agent completed the action end to end — booked, bought, submitted — and it worked.
Own this site?
1 check did not pass when we last looked: API catalog. Each is a small, specific fix; the rubric says exactly what we look for.
Behavioural verification — an agent completing your booking, purchase or contact flow end to end, with the date published here — opens to a small founding cohort first. Leave an email to be in it.
Related verified sites
EasybillingEasyBilling is a global billing and payments platform designed for AI companies with flexi
billing platform FlexpriceFlexprice is an open-source platform for metering, billing, and feature management designe
billing platform OrbOrb provides a billing platform supporting usage-based, seat-based, hybrid billing, and en
billing platform PolarPolar provides billing infrastructure with tax compliance and automated delivery for selli
billing platform EnlivyEnlivy is a SaaS platform for service companies managing offers, contracts, invoicing, pay
billing platform Aptos DocumentationAptos Developer Documentation provides guides, SDKs, and tools to build Web3 applications
blockchain developer documentation Aptos DocumentationAptos Documentation provides developer guides, SDKs, tools, and APIs to build Web3 applica
blockchain developer documentation engineering.teamstation.devDistributed Engineering Operating System doctrine for CTOs using TeamStation AI, Axiom Cor
engineering doctrine Record generated from a live database query. Method: about the index.