What is a unified API for prediction markets?

A unified prediction market API aggregates contracts, pricing, and liquidity across multiple venues into one consistent model so developers and institutions can integrate once instead of maintaining separate feeds per exchange.

Does Delphi cover Kalshi and Polymarket data?

Delphi’s unified coverage includes Kalshi and Polymarket among 10+ prediction market exchanges, subject to access tier and product terms. See documentation for current coverage and endpoints.

How do I get prediction market data for institutions?

Delphi offers Enterprise access for teams that need higher limits, support, and institutional workflows. Contact Delphi through the enterprise request flow on the Data page or contact form.

Prediction Market Data & API | Delphi Markets - Kalshi, Polymarket, Unified Access

Free

$0 /mo

Get started with test API keys and explore Delphi’s data model.

Test API keys (10 min)
60 requests/min
Kalshi & Polymarket data

Enterprise

Custom

For high-volume and institutional use cases where data access becomes infrastructure.

Priority support
Research insights
Higher rate limits
Advanced analytics

Request Access

Dev

$20 /mo

For developers and small teams building against production-grade data.

Production API keys
300 requests/min
9+ exchanges
WebSocket streaming

( why Delphi )

More market coverage

Delphi aggregates 10+ prediction market exchanges. Most competitors only expose a fraction of that market, which means less context and weaker signal formation.

More than raw data

Indices and insights sit on top of the API, so Delphi is not just a feed provider. It is an intelligence layer for pricing elections, macro outcomes, and geopolitical risk.

A media layer too

Delphi News turns market data into reporting. That makes the platform not only a source of data, but a source of interpretation rooted in crowd signal rather than editorial bias.

Choose the access level that fits your build.

More market coverage

More than raw data

A media layer too