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Data API

Oddpool

Research cross-venue markets and data through Oddpool. Free accounts and existing subscriptions continue, but new paid subscriptions are closed.

3.0/ 5Editorial rating0 user reviews
Visit official siteoddpool.com
Available on
Web, REST API, WebSocket
Availability: restricted · Paid subscription signup, not a shutdown of the entire service.

Screenshots and interface

Product preview1 / 2

Institutional and self-service data access overview.

What is Oddpool?

Oddpool offers self-service API access alongside an institutional data product. It combines market search and normalized feeds with historical execution and order-book data, while public dashboards provide ways to explore probabilities and market differences before integrating the API.

Who it is for

  • Developers building cross-venue research tools
  • Trading desks requiring historical depth and execution data
  • Macro researchers studying event-implied distributions

Features and coverage

Available on
Web, REST API, WebSocket
Markets & venues
Polymarket, Kalshi
  • Event search

    Search the normalized market catalog with one API key.

  • Historical depth

    Retrieve venue-specific historical order-book snapshots.

  • Execution tape

    Read trades with price, size and taker-side context.

  • Live distributions

    Stream supported normalized probabilities through WebSocket.

  • Reference data

    Use versioned market references to make saved research identifiable later.

  • Institutional delivery

    Discuss full tick history, book reconstruction and Parquet delivery for larger workflows.

  • Public research views

    Explore macro, sports, market-difference and other dashboard surfaces.

Workflows with Oddpool

Build a macro monitor

Search the relevant event, retain its reference IDs and stream the supported outcome probabilities. Compare the full outcome distribution rather than a single headline percentage.

Evaluate a data pipeline

Start with a bounded historical-book and trade query. For institutional use, inspect a real sample of the archive and its schema before sizing ingestion.

Compare venue pricing

Use matched event definitions, then account for fees and spread when interpreting a difference.

Pricing and total cost

Oddpool is no longer accepting new paid subscriptions. Existing subscriptions and free accounts continue. Listed legacy Pro and Premium prices are $30/month and $100/month; they are not currently available for new purchase.

Free

$0

  • Public dashboards
  • 1,000 API requests/month
  • 1 WebSocket distribution connection

Existing Pro subscriptions

$30/month — closed to new subscriptions

  • Existing paid access continues

Existing Premium subscriptions

$100/month — closed to new subscriptions

  • Existing paid access continues

Access: The provider explicitly distinguishes closed paid signups from continuing free and existing paid access.

Getting started

Before you start: Institutional tick and bulk-delivery features should be scoped separately from the entry API tier.

  1. Create an API key.
  2. Use X-API-Key with a bounded event search.
  3. Keep venue and reference IDs with the returned market.
  4. Choose historical book/trade endpoints or the WebSocket feed.
  5. Check the selected plan’s quotas and required delivery format.

Open documentation

Useful links

What to check

  • Institutional tick and bulk-delivery features should be scoped separately from the entry API tier.
  • A normalized probability alone does not describe available execution size.
  • Venue contract rules still determine whether two outcomes are comparable.

A closer look

Ratings & reviews

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Editorial rating
3.0/ 5
0 user reviews
Polytoolhub editorial

Our take on Oddpool

Free dashboards and documented data interfaces remain useful for research. Closed new paid subscriptions materially limit upgrades and new production integrations; existing subscriber terms need confirmation.

Based on documented features, setup and access terms. How we rate

User reviews 0

The main score switches to user ratings after 5 published reviews.

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Frequently asked questions about Oddpool

Can I start without an institutional contract?

Yes. A free self-service tier provides 1,000 requests per month.

Does it include an execution tape?

The historical API includes trade endpoints.

Can it deliver large archives?

The institutional offering includes Parquet-oriented workflows; delivery and coverage are agreed with the provider.