What is OddsPipe?

Use a minimum-spread query to narrow a research set, then discard weak matches and inspect both contract definitions. Confidence rates the match, not whether either order will fill.

The homepage describes one-minute resolution rather than tick-by-tick execution data. Depth, fees and settlement differences can alter the apparent spread. A free tier supports evaluation; production volume and redistribution need the appropriate paid plan.

Who it is for

Developers building cross-venue comparison screens.
Researchers checking Polymarket and Kalshi questions.
Python users seeking a short integration.

Features and coverage

Matched pairs
Retrieve linked contracts across the two venues.
Confidence
Filter pairs by the supplied match score.
Spread queries
Apply a minimum price difference.
Search
Search text and filter venue or status.
Market details
Read a market and its latest price.
Python or REST
Use oddspipe or direct HTTP with X-API-Key.

Workflows with OddsPipe

Build a shortlist

Query spreads, filter weak matches and read both rule sets. Check current bids/asks, depth and fees separately.

Track a contract

Resolve its OddsPipe ID, read details and request its cross-platform spread.

Export research

Keep paired IDs, confidence and observed prices together for a bounded topic.

Pricing and total cost

Free supports evaluation; paid tiers target production volume and redistribution.

Free

$0/month

Evaluation and side projects

Build

$49/month

Solo production builders

Launch

$99/month

Growing apps and teams

Scale

$299/month

High volume and redistribution

Getting started

Before you start: Match confidence does not establish fillability.

Register by email and obtain an API key.
Install oddspipe or prepare direct HTTP.
Make a small search or spread query.
Retain both contracts and match confidence.
Review quotas before repeated scans.

One-minute resolution is not a tick-by-tick execution feed.

Useful links

View OddsPipe pricing

What to check

Match confidence does not establish fillability.
Displayed spreads omit the full impact of depth, fees and settlement differences.
Redistribution requirements affect plan choice.

A closer look

Ratings & reviews

Editorial rating

3.5/ 5

0 user reviews

PredictionToolkit editorial

Our take on OddsPipe

Matched contracts and confidence filters provide a focused API. Minute-level observations and incomplete execution costs require further analysis of quoted spreads.

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

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

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Frequently asked questions about OddsPipe

Which venues are matched?

Polymarket and Kalshi.

Can I filter uncertain matches?

Yes. Use the confidence score.

Is every spread executable arbitrage?

No. Inspect rules, current bids and asks, depth and fees.

Is Python required?

No. Call REST directly with an API key.

OddsPipe: Polymarket and Kalshi Matched-Market API

Screenshots and interface