A free, keyless API for dynasty fantasy football values — built from 672k real trades

Elliot Pollaro — Fri, 12 Jun 2026 05:45:38 +0000

Most dynasty fantasy football value sources are either crowdsourced votes or locked behind paywalls. At Dynasty Dealer we took a different approach: compute player values from what dynasty managers actually pay — a database of 672,000+ real Sleeper trades — and publish them through a free public API.

No API key. No signup. CORS enabled, so it works straight from the browser.

Quick start

curl https://www.dynastydealer.com/api/player-values

One JSON document, top 1,000 assets (players + draft picks) sorted by current value:

{
  "source": "tidb",
  "players": [
    {
      "sleeper_id": "4984",
      "name": "Josh Allen",
      "position": "QB",
      "team": "BUF",
      "base_value": 10000,
      "current_value": 9927,
      "votes": 302,
      "updated_at": "2026-06-11T21:03:26.000Z",
      "age": 30
    }
  ],
  "total": 1000
}

base_value is the raw trade-derived engine value; current_value adds community vote adjustments. The engine recalculates from new real trades daily.

Query parameters (all optional)

Param	Values	What it does
`position`	`QB` `RB` `WR` `TE`	Filter to one position
`perSlot`	`true`	Per-slot rookie pick rows (the 1.03 specifically, not just "2027 1st")
`format`	`redraft`	Single-season value model (players only, includes projections)
`scoring`	`ppr` `half` `std`	Redraft mode: scoring format
`sf`	`true`	Redraft mode: superflex values

JavaScript (Node 18+ or browser)

const res = await fetch('https://www.dynastydealer.com/api/player-values');
const { players } = await res.json();

const chase = players.find(p => p.name === "Ja'Marr Chase");
console.log(`${chase.name}: ${chase.current_value}`);

Python

import requests
import pandas as pd

data = requests.get("https://www.dynastydealer.com/api/player-values").json()
df = pd.DataFrame(data["players"])
print(df[["name", "position", "team", "current_value", "age"]].head(20))

More working examples (Discord bot, Google Sheets script) live in the examples repo.

What people build with it

Discord/Slack bots — instant value lookups and trade checks in league channels
League sites — live value boards for your league
Spreadsheets — Sheets/Excel scripts that pull fresh values for roster tracking
Research — we publish our own studies on this data, like what a dynasty 1st actually costs by draft slot (28,168 trades) and crowd values vs. real trade prices

License

Free for any use — personal, commercial, or content — with one condition: display a visible link to dynastydealer.com (e.g. "Values by Dynasty Dealer") wherever the values appear.

Fair use note: responses are edge-cached for 60 seconds and values change at most a few times per day, so cache on your side — a daily fetch covers almost every use case.

Full endpoint reference: Developer Integration Guide. Questions or weird edge cases — comments welcome.