PropLine
Player props API with graded results (won/lost/push) across 54 sports
Overview
PropLine is a developer-first player props API launched in April 2026. Its signature feature is prop resolution: every prop is automatically graded won, lost or push against the official box score. It delivers real-time lines refreshed every 60 seconds (30s for in-progress games) from 22 sportsbooks plus 6 exchanges (Kalshi, Polymarket, Matchbook, Smarkets, Novig, ProphetX), and is response-format compatible with the-odds-api for drop-in migration.
Quick answer: PropLine is a player props API that grades every prop won/lost/push against the real box score. It covers 54 sports across 22 books and 6 exchanges, with 1,000 free requests/day — no credit card required.
Pros
- Graded prop results (won/lost/push) — unique among props APIs
- Generous free tier: 1,000 requests/day, no card
- the-odds-api compatible responses for drop-in migration
- 22 books + 6 exchanges incl. Kalshi and Polymarket in one response
- Flat requests/day pricing, no credit math
- Official Python SDK
- Webhooks and WebSocket streaming
Cons
- Young service (April 2026) — graded history starts at launch
- No snooker, darts or cycling coverage
- Graded prop depth varies by sport
- Smaller community than established odds APIs
Best For
Not Ideal For
Specifications
SDKs
Leagues
Our Verdict
PropLine is a solid choice for prop betting tools and line shopping apps, with an overall score of 8.1/10. While it performs well in most areas, consider young service (april 2026) — graded history starts at launch when making your decision.
Coverage
Sports Supported
Leagues & Competitions
14 leagues and competitions covered
Developer Experience
API Paradigms
SDKs
Documentation
Commercial Terms
Pricing Plans
Free
1,000/day
- All sports and books
- Live odds
- No credit card required
Hobby
5,000/day
- Prop resolution
- History
- +EV features
Pro
25,000/day
- 90-day resolved-prop archive
- Bulk CSV export
- Priority support
Streaming
1,000,000/day
- Webhooks + WebSocket push
- HMAC-signed delivery
- 365-day export depth
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Frequently Asked Questions
Is PropLine free?
Yes. The free tier includes 1,000 requests per day with no credit card required. Paid plans start at $9/mo (Hobby) and unlock prop resolution, history and +EV features.
What makes PropLine different from the-odds-api?
Prop resolution — every player prop is graded won/lost/push against the official box score. PropLine also includes 6 exchanges alongside 22 books, flat requests/day pricing, and the-odds-api compatible responses for drop-in migration.
Which sports does PropLine cover?
54 sports including MLB, NBA, WNBA, NHL, NFL, NCAAF, NCAAB, golf, tennis, 28 soccer leagues, UFC and boxing, with 60+ player prop markets.
Does PropLine have a Python SDK?
Yes. The official SDK installs with pip install propline and covers sports, events, odds, history, closing lines, player prop history and movement endpoints.
How far back does PropLine historical data go?
The resolved-prop archive starts at its April 2026 launch: 90 days on Pro, 180 on Streaming Lite, 365 on Streaming, with a one-time $99 historical backfill option.
Try PropLine for your next project
Start with the free tier, integrate in minutes with their well-documented API, and upgrade only when you outgrow the limits.