What we have not tested

Pricing coverage: 41 of 63 products in the 9 pricing-covered arenas have unit pricing extracted verbatim from the vendor’s own pricing page (7 record an honest “pricing unclear” — JS-shell or quote-only pages we refuse to guess at). Every figure carries its source URL, exact quote, and fetch date; we never compute a price we didn’t extract.

Most-wanted untested cells — the highest-impact gapsMost-wanted untested cells

The ten untested (product, story) pairs whose testing would move the most-read scores the most — heaviest stories on the most-watched products (capped at two per product so one giant can’t fill the board). Have first-hand evidence for one? Send it in.

Product	Untested story	Arena	Weight	GitHub ★
Superpowers	Connect an agent via an official MCP server	Agent Skills & Extensions	×3	286,309
Superpowers	Drive the product through a documented public API	Agent Skills & Extensions	×3	286,309
Skills for Real Engineers	Delegate tasks to a built-in AI assistant inside the product	Agent Skills & Extensions	×3	261,468
Skills for Real Engineers	Drive the product through a documented public API	Agent Skills & Extensions	×3	261,468
React	Delegate tasks to a built-in AI assistant inside the product	Frontend Frameworks	×3	250,422
React	Plug MCP servers into this product so it can use their tools	Frontend Frameworks	×3	250,422
n8n	Delegate tasks to a built-in AI assistant inside the product	Workflow Automation	×3	204,216
Ollama	Define rules that trigger actions automatically on events	Local LLM Runtimes	×3	180,849
Ollama	The documented maximum concurrent requests or connections the local server can handle before throughput degrades	Local LLM Runtimes	×3	180,849
Firecrawl	Whether exceeding my plan's monthly credit or request quota triggers overage charges or a hard cutoff	Web Scraping APIs	×3	180,429

Agent surface health — 6-hourly keyless uptime checksAgent surface health

Every 6 hours we keylessly ping each product’s documented agent surfaces — its llms.txt, remote MCP endpoint, and openapi.json where we previously found one. An auth-gated MCP endpoint answering 401 counts as up; only timeouts, 404/410 and 5xx count as down. Currently monitoring 387 surfaces across 261 products (248 llms.txt · 98 MCP · 41 openapi.json), tracking since Sep 8 '26 — uptime percentages appear on product pages after a week of history.

Product	Arena	Surface	URL	Down since	Last status
Kong	API platforms	llms.txt	https://kong.com/llms.txt	Sep 11 '26	timeout

Untested is a per-cell status: a none/na verdict that cites zero evidence (the same definition the tables use to render “untested” instead of 0 — see methodology). “Probed” is stricter than “evidenced”: only verdicts citing a hands-on probe count.