Build with
Yoseri data.
100+ brokers, 16 sports · 160+ leagues, real-time returns. The same data engine behind the platform investors use — a read-only feed for analysis, never an order book. The API isn't live yet; we're opening it to developers around October 2026. Join the waitlist and we'll reach out the moment it ships.
No spam. One email when the API goes live.
Plans we're planning.
Indicative pricing for launch — final tiers may shift before the API opens.
- Real-time returns
- Edge & EV endpoints
- Community support
- Everything in Builder
- Webhooks
- Higher rate limits
- Priority support
- Everything in Platform
- Dedicated infra
- Custom SLAs
- Signed commercial agreement
Platform & Syndicate tiers will require a signed commercial agreement at launch.
What you'll ship.
Investing & sports apps
Power returns comparison and +EV surfacing inside your own product.
Trading bots
Feed real-time prices and edges into automated strategies.
Research
Backtest models against historical returns and closing lines.
Media
Embed live returns and movement into editorial and broadcast.
One call from your first edge.
A preview of what the API will look like. Endpoints and shapes may change before launch.
curl https://api.yoseri.com/v1/returns \
-H "Authorization: Bearer $YOSERI_API_KEY" \
-d sport=nfl -d market=spread
{
"event": "KC @ BUF",
"market": "spread",
"best": { "book": "Pinnacle", "line": -2.5, "price": 2.02 },
"edge_pct": 3.1
}Read-only data, never position placement: the API returns returns and analytics — it never places positions or connects to broker accounts. Full docs will go live at developers.yoseri.com when the API ships.
Webhooks
Subscribe to returns movements and settlement events — push, not poll.
SDKs
First-party clients for TypeScript and Python, with typed responses.
HMAC signing
Every webhook is HMAC-signed so you can verify authenticity.
Want in first?
Building something that needs the data before October? Tell Jules what you're building — early-access slots go straight through the founder, no sales team.