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Assymetrix

Query prediction-market metadata, prices, trades and order books across venues through a normalized data API.

3.5/ 5Editorial rating0 user reviews
Visit official sitedata.assymetrix.com
Available on
REST API, WebSocket, Web
Pricing
Free: $0/month · Developer: $49/month · Pro: $199/month

Screenshots and interface

Product preview1 / 2

Prediction-market API overview and supported platforms.

What is Assymetrix?

Assymetrix has two distinct product surfaces: a live developer data portal and a trading-platform preview with a waitlist. The data product standardizes market metadata and currencies across venues and offers historical series, trade records, book snapshots and streaming access. Choose a plan by the endpoint and historical window you need, as the broad archive description is larger than every individual plan’s entitlement.

Who it is for

  • Developers replacing separate venue data adapters
  • Researchers who need price history and trade records
  • Teams building dashboards with consistent market identifiers

Features and coverage

Available on
REST API, WebSocket, Web
Markets & venues
Polymarket, Kalshi, Limitless
Research topics
Normalized data, Historical markets
  • Canonical market schema

    Query events, markets and tags using a shared structure across supported venues.

  • Freshness endpoints

    Check data recency alongside the record you retrieve.

  • OHLCV series

    Use hourly and daily candles on the free plan, with intraday intervals on paid tiers.

  • Trade records

    Access paginated market trades and fills mapped to readable market identities.

  • Order-book data

    Use latest snapshots or a historical book window according to the plan.

  • Streaming feed

    Use the advertised WebSocket product for live applications, with access checked against the chosen subscription.

  • Wallet analytics

    Investigate wallet activity and PnL through the broader data product.

  • Separate platform preview

    The consumer terminal, alerts and copy-trading presentation has a waitlist; it is distinct from the available API.

Workflows with Assymetrix

Build a cross-venue browser

Start with canonical events and markets, retain the native venue IDs and inspect freshness before displaying a quote.

Choose a history plan

List the candle intervals, trade data and book window your research needs, then match each to its plan entitlement.

Prototype without a subscription

Use the free REST allowance for metadata and hourly or daily series before increasing throughput.

Pricing and total cost

A free REST plan and paid developer tiers are published in the data portal.

Free

$0/month

  • 10,000 requests/month; 1 request/second
  • 1 API key; REST only
  • 30-day history; hourly and daily OHLCV

Developer

$49/month

  • 1.5 million requests/month; 25 requests/second
  • 3 API keys; 365-day history allowance
  • Intraday OHLCV; 90-day snapshots; market trades; latest book

Pro

$199/month

  • 7.5 million requests/month; 100 requests/second
  • 10 API keys; unlimited history allowance
  • Historical order book limited to the listed 90-day window

Access: Business, enterprise and academic options have separate portal sections.

Getting started

Before you start: The free plan is REST-only and has a 30-day history window.

  1. Open the developer portal and choose an API plan.
  2. Create a key from the portal’s dashboard.
  3. Begin with one event and its canonical market records.
  4. Check the freshness fields and map native venue IDs.
  5. Add the required history endpoints and keep within the per-second limit.
  6. Confirm streaming and historical-book entitlements before building around them.

Useful links

What to check

  • The free plan is REST-only and has a 30-day history window.
  • A plan’s general history allowance does not remove a separately stated order-book or snapshot limit.
  • The trading-platform preview is waitlisted; API availability does not imply copy-trading access.

A closer look

Ratings & reviews

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Editorial rating
3.5/ 5
0 user reviews
Polytoolhub editorial

Our take on Assymetrix

A normalized market schema, freshness checks and published tiers give data developers a clear starting point. REST, streaming and historical-book coverage differ by plan and should be tested against the intended workload.

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 Assymetrix

Is there a free API plan?

Yes: 10,000 monthly requests, one request per second and one key.

Can I use one schema for several venues?

That is the core purpose of its canonical market API.

Does Pro provide unlimited historical order books?

Its general history allowance is unlimited, but the displayed historical-book entitlement is 90 days.

Is the trading terminal already open?

The main platform website directs users to a waitlist; the developer API is a separate live product.