Odds API by market / MLB
MLB Total Bases API
Live batter_total_bases odds across every book that posts it, in one REST call — and, unlike any other odds API, every one of those outcomes settled against the official result once play ends.
No credit card. 1,000 requests / day on the free tier.
What MLB total bases is
Bases earned on hits: one for a single, four for a home run. Walks do not count, which is what separates it from an on-base market.
How we settle it. Graded against total bases in the box score, so an extra-base hit moves it by more than one.
Every number on this page is measured against the live API, never copied from a spec sheet. Last measured 8 September 2026.
Books posting MLB total bases
Measured live, not listed from a spec. Coverage moves — a book that has not put its board up yet will not appear until it does, which is exactly what this list is for.
Line shopping across all of them is one request — every book arrives in the same bookmakers array, not one call per book. Add ?bookmakers= to narrow it, or use /best-line for the best price per line already ranked.
Recently settled MLB total bases outcomes
These are real rows out of the API, not an illustration. Each one was a price on a board before the event and carries the actual figure it was graded against afterwards. No other odds API returns that last column — they stop at the price.
85,232 total bases outcomes settled in the last 4 days across 19 books. The 12 most recent:
| Player | Bet | Actual | Result |
|---|---|---|---|
| Alejandro Kirk | 2+ Total Bases | 5.0 | won |
| Alika Williams | 2+ Total Bases | 0.0 | lost |
| Brett Bateman | 2+ Total Bases | 0.0 | lost |
| Alejandro Kirk | Over 1.5 | 5.0 | won |
| Alika Williams | Over 1.5 | 0.0 | lost |
| Brett Bateman | Over 1.5 | 0.0 | lost |
| Charles McAdoo | Over 0.5 | 0.0 | lost |
| Donovan Walton | Over 0.5 | 0.0 | lost |
| Ernie Clement | Over 1.5 | 1.0 | lost |
| Carlos Cortes | Over 0.5 | 2.0 | won |
| Carlos Cortes | Under 0.5 | 2.0 | lost |
| Charles McAdoo | Over 0.5 | 0.0 | lost |
Over/Under split, last 4 days
The Over won 29.9% of 29162 decided total bases lines (8725 over, 20437 under). Computed from the settled rows themselves, scoped to MLB only.
Read off 31,501 Over legs out of 85,232 settled outcomes on this market. The rest are Unders and milestone legs (“1+”, “2+”) that some books price here too, and a threshold rung is not an Over.
A few days of one market describes a few days — it is not an edge. Pull the full history through /exports/resolved-props for a sample worth modelling on.
Live response
Captured from the real endpoint on Cleveland Guardians @ Baltimore Orioles, trimmed to one book and three outcomes so the shape stays readable. The full response carries every book and every line, alternates included, in the same call.
{
"home_team_key": "orioles",
"away_team_key": "guardians",
"home_team_id": "mlb:110",
"away_team_id": "mlb:114",
"id": "203340",
"sport_key": "baseball_mlb",
"home_team": "Baltimore Orioles",
"away_team": "Cleveland Guardians",
"commence_time": "2026-09-08T22:35:00Z",
"live": false,
"last_update": "2026-09-08T13:56:13.244786Z",
"merged_from_event_ids": null,
"bookmakers": [
{
"key": "betmgm",
"title": "BetMGM",
"last_update": "2026-09-08T13:54:58.619919Z",
"link": null,
"app_link": null,
"pregame_only": false,
"book_event_id": null,
"markets": [
{
"key": "batter_total_bases",
"description": "Angel Genao: Total bases",
"last_update": "2026-09-08T13:54:58.619919Z",
"period": null,
"suspended_at": null,
"team": null,
"outcomes": [
{
"name": "Over",
"description": "Angel Genao",
"price": -190,
"point": 0.5,
"book_updated_at": null,
"book_version": null,
"payout_multiplier": null,
"dfs_odds_type": null,
"last_change_at": "2026-09-08T13:38:00.641655Z",
"last_seen_at": "2026-09-08T13:54:58.619919Z",
"liquidity": null,
"liquidity_updated_at": null,
"line_gap": null,
"book_outcome_id": null,
"outcome_id": null,
"player_id": "mlb:694197"
},
{
"name": "Under",
"description": "Angel Genao",
"price": 140,
"point": 0.5,
"book_updated_at": null,
"book_version": null,
"payout_multiplier": null,
"dfs_odds_type": null,
"last_change_at": "2026-09-08T13:38:00.641655Z",
"last_seen_at": "2026-09-08T13:54:58.619919Z",
"liquidity": null,
"liquidity_updated_at": null,
"line_gap": null,
"book_outcome_id": null,
"outcome_id": null,
"player_id": "mlb:694197"
}
]
}
]
}
]
}The response shape is the-odds-api compatible — events, bookmakers, markets, outcomes — so migrating is usually a base URL change.
Try it
1. List MLB events to get an event id:
curl "https://api.prop-line.com/v1/sports/baseball_mlb/events?apiKey=YOUR_API_KEY"2. Pull total bases for one game across every book — this exact URL works right now:
curl "https://api.prop-line.com/v1/sports/baseball_mlb/events/203340/odds?apiKey=YOUR_API_KEY&markets=batter_total_bases"3. After the game, get the graded outcomes with the actual stat:
curl "https://api.prop-line.com/v1/sports/baseball_mlb/events/203340/results?apiKey=YOUR_API_KEY"Steps 1 and 2 run on the free tier. Step 3 — prop resolution — starts on Hobby at $9/mo. See pricing.
Get your free MLB odds API key
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