What we tested
Probed live on 23 Aug 2026 against rubric v1. 2 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 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
register“Sign up: https://zernio.com/signup”https://zernio.com/signup
contact“Contact: https://zernio.com/contact”https://zernio.com/contact
query_api“Create an API key and call the API”https://zernio.com/api/v1/posts
Context
8 sites in the index share the category social media api, of which 4 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?
3 checks did not pass when we last looked: Markdown twin at a predictable URL, llms.txt, MCP server answers. 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
PostproxyPostproxy provides a unified social media API for agencies, SaaS, and AI agents to publish
social media api Ayrshare API DocumentationAyrshare provides a unified social media API to manage posts, analytics, comments, message
social media api Juicer APIJuicer API provides a unified API to read and manage social media feeds, sources, posts, a
social media api Ocoya API DocsDocumentation for Ocoya's REST API enabling social media content scheduling, workspace man
social media api SocialAPI.AISocialAPI.AI provides a unified REST API for developers to manage inboxes, publish content
social media api Sorsa Developer PlatformSorsa API provides REST access to public X (Twitter) data including user profiles, tweets,
social media api bundle.socialbundle.social offers a unified social media API for posting, analytics, and account manage
social media api VibeMarketologRussian AI marketing platform offering agents for advertising, analytics, and sales with 2
ai marketing platform Record generated from a live database query. Method: about the index.