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.
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