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 alphafeed.main-kill-isr.mintlify.me — the standard set for sites on mintlify.
search_alpha_feedquery_docs_filesystem_alpha_feedsubmit_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
read“Fetch the complete documentation index at: https://docs.alphafeed.org/llms.txt”https://docs.alphafeed.org/llms.txt
Context
2 sites in the index share the category financial market data api.
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
NGN Market APIProvides real-time and historical NGX market data via REST and WebSocket APIs with structu
financial market data api Ikigai CorporationIkigai Corporation supplies APIs, pharmaceutical intermediates, excipients, and specialty
pharmaceutical supplier 十分吸引十分吸引 offers searchable podcast episodes with full transcripts, summaries, chapters, and ke
podcast transcript library æºæ¨æ¶ä»£ GenOptimaGenOptima provides AI search optimization infrastructure and brand collaboration systems f
ai search optimization platform 屠龙之术屠龙之术 is a personal podcast offering full transcripts, AI summaries, and searchable content
podcast transcript search 缤纷云文档Documentation introducing 缤纷云 S4, an S3 compatible object storage service with content pro
object storage service Record generated from a live database query. Method: about the index.