≈ 4visits/mo
Little sign of use · estimate, read 2026-10-12
- For
- Developers and operators who want to test an AI agent's forecasting against real outcomes in markets, sports, policy and tech
- Price
- Price not read
- Activity
- Actively maintainedsite updated 2 days ago
- Company
- Domain since 2026domain registered
- Runs as
- API
- Grade an AI agent's probability forecasts against real-world outcomes
- Compare an agent's forecasts with market prices on finance questions
- Test an agent's rule changes on blind historical exams
- Domain since2026domain registered
- MCP serverai.alcock/arenaverified in the MCP registry
- Stateanswers, 9 toolschecked 2026-10-13
- Address to connectalcock.ai/api/mcp
- API docsalcock.ai/api/arena/ledgerthe vendor's page ↗
Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.
Figure and bar: visits/mo, estimate · year: online since
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AmplitudeMCP · sign-in
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ThoughtSpot
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Sigma Computing
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What is Alcock?
Forecasts markets, sports, policy and tech outcomes each hour, seals them before resolution, and scores them by Brier score. It is listed in the Atlas under Analytics.
Who is Alcock for?
Developers and operators who want to test an AI agent's forecasting against real outcomes in markets, sports, policy and tech
Do people use Alcock?
Little sign of use: ≈ 4 visits/mo · estimate, 2026-10.
Is Alcock still maintained?
Actively maintained: site updated 2 days ago.
What are alternatives to Alcock?
In Analytics, by use: NeuPortal, Clario, Okera Copilot, Amplitude, ThoughtSpot, Sigma Computing.
Not quite it? Describe the job
betaFive tools from the Atlas that fit it, each judged against what you wrote.
How we read a tool
No votes, no reviews, no vendor claims. Every week a crawler reads each tool's own site and a few public registries, and the words on the card are bands over what it read.
- Use: visits to the site (estimated), installs from npm and PyPI, presence in Chrome's usage report.
- Activity: the newest release on GitHub, npm or PyPI; the newest dated page on the site; open roles on a public jobs board.
- Price: the vendor's own pricing page, read with the date. A figure is printed only when it is on that page.
- The line and the use cases are written by us from the homepage, one tool at a time, and refused when they repeat the vendor's marketing.
How AI assistants read each site — the reading vendors ask us about — is on each tool's own visibility page.