Quick answer
Odds API: An odds API is a programmatic interface that delivers bookmaker (and often exchange and prediction-market) prices as structured data, so software can compare, store or analyse them.
Also called: sports odds API, betting odds API
Explained, with an example
Odds APIs exist because comparing prices across many bookmakers in real time is impractical by hand [1]. For example, Odds-API.io Partner link returns JSON from a REST API (base URL https://api.odds-api.io/v3) plus a WebSocket feed and an official MCP server, covering 450+ bookmakers, Polymarket and Kalshi [2] [3].
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Try it: tools and tutorials
Frequently asked questions
What is an odds API?
An odds API is a programmatic interface that delivers bookmaker (and often exchange and prediction-market) prices as structured data, so software can compare, store or analyse them.
About this guide
Pred-Data publishes independent, source-linked explainers about prediction markets and the AI tools used around them. Every factual claim on this page links to a primary or reputable secondary source, checked on the date shown above. We do not run a trading venue, take bets, or give personal advice.
Author: Ken Lin · Corrections: if you spot an error, we review it and date-stamp the fix.
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Sources
- What Is an Odds API? — Odds-API.io glossary, accessed 2 Nov 2026
- Odds-API.io — homepage (coverage, endpoints, MCP, plans) — Odds-API.io, accessed 2 Nov 2026
- Quickstart (get a key, first calls, example responses) — Odds-API.io docs, accessed 2 Nov 2026