Perennial Metrics

NHL Analytics
for Everyone.

Deeper stats. Better context. Free to explore.

Independently developed analytics models, interactive visualizations, and a developer API — built for fans who want to understand the game on another level.

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What We're Building

Tools for fans who dig deeper.

Built on publicly available NHL data. Every model independently developed, every visualization crafted in-house.

Real-Time Win Probability

Live game-state modeling with 16-feature gradient-boosted trees. Score context, momentum, strength state, and team quality — updated on every event.

Models That Go Deep

Shot quality, player value, goaltending, contract efficiency, and more. Multiple angles on the same game you already love watching.

13 Seasons of Context

Every model trained on over a decade of NHL play-by-play data. Historical depth that reveals trends, not just snapshots.

010

Clutch Index

Leverage-weighted performance with Bayesian shrinkage. Quantifies who performs when the game is on the line — adapted for hockey with individual-level stabilization.

Developer API

Want to build your own tools? Pro subscribers get RESTful API access with documentation and cursor-based pagination.

Interactive Visualizations

D3.js-powered shot maps, radar charts, zone heatmaps, and career timelines. Every chart is interactive, every datapoint is explorable.

Under the Hood

The models behind the numbers.

Every model is built from scratch using publicly available NHL data. Independent code, independent analysis, inspired by a community that keeps pushing hockey forward.

FoundationCore Models
  • 01Goals Saved Above Expected (GSAx)
  • 02Player Usage Charts
  • 03Clutch IndexExclusive
  • 04Win Probability
  • 05Trade Value Calculator
Player & ContractBeyond the Box Score
  • 06Contract Surplus Value
  • 07Player Consistency
  • 08Shift Quality ScoreExclusiveBeta
TacticalGame Within the Game
  • 09Expected Assists (xPA)Beta
  • 10Playmaker RatingExclusive
  • 11Forecheck Disruption IndexExclusiveExperimental
  • 12Goalie Pull OptimizerExclusiveExperimental
ExperimentalIn Development
  • 13Injury Risk PredictorExclusive

How It Works

Free to explore. Pro to build with.

Every fan gets access to all models and interactive visualizations on the site. Pro is for developers and analysts who want API access and data export.

Free — $0/mo

Full access to every model, stat, and interactive visualization on the site. No credit card, no catch.

Pro — $10/mo

Developer API access. Embeddable charts for your site or app. CSV and JSON data export across all models.

sample-response.json
// Sample API response
{
"data": {
"player": "Nathan MacKinnon",
"season": "2025-26",
"xg_per_60": 1.42,
"war": 4.71,
"clutch_index": 9.99,
"gsax": null
},
"meta": {
"cached": true,
"generated_at": "2026-03-21T..."
}
}

We're almost ready.

New models, new visualizations, and a fresh way to watch the game. Get notified when we launch.