Overview
When evaluating developer infrastructure for prediction market applications, the Dome vs Poly SDK comparison represents two distinct approaches to solving the same core challenge: giving developers reliable, structured access to prediction market data and trading functionality. Dome is a developer infrastructure platform that promises unified APIs and SDKs for accessing real-time and historical prediction market data across multiple platforms. However, as of this writing, Dome is listed as coming soon, meaning it has not yet launched and no hands-on evaluation of its capabilities is currently possible. Developers interested in Dome should monitor its website at domeapi.io for updates before making integration decisions.
Poly SDK, published under the package name @catalyst-team/poly-sdk, is an active, open-source TypeScript SDK built specifically to simplify development on top of Polymarket. It consolidates Polymarket's fragmented interfaces — the CLOB trading API, WebSocket streams, on-chain conditional token operations, and analytics endpoints — into a single typed codebase. Teams building automated trading bots, analytics dashboards, arbitrage systems, or research pipelines can use Poly SDK as a complete backend toolkit without assembling multiple disconnected clients. Its active status and public GitHub repository make it immediately accessible and auditable by any developer.
Dome vs Poly SDK: Key Differences
| Criteria | Dome | Poly SDK |
|---|---|---|
| Primary Function | Unified API/SDK layer for multi-platform prediction market data | Comprehensive TypeScript SDK for Polymarket trading, analytics, and on-chain operations |
| Target User | Developers seeking cross-platform prediction market data aggregation | Developers building Polymarket-specific bots, dashboards, arbitrage tools, and analytics pipelines |
| Platform / Interface | API and SDK (details not yet publicly available) | Open-source TypeScript library via npm, with WebSocket and REST integration |
| Current Status | Coming Soon — not yet available for use | Active — available now on GitHub and npm |
| Automation Support | Unknown at this stage | Full support: market/limit orders, GTC/GTD/FOK/FAK types, copy trading, arbitrage, smart-money tracking |
| Pricing | Not disclosed | Free and open-source (MIT or equivalent) |
| Key Strength | Potential multi-platform data aggregation under a single interface | Deep Polymarket integration with on-chain CTF operations, real-time streaming, and validated trading workflows |
When to Choose Dome
Dome may be worth watching if your use case requires aggregated data across multiple prediction market platforms rather than a deep, single-platform integration. Once launched, it could appeal to developers who prefer a managed API layer over maintaining an open-source library themselves. That said, given its coming-soon status, it is not a viable option for any project with immediate development timelines.
- You need cross-platform prediction market data and are willing to wait for Dome's public launch before starting development.
- Your team prefers a hosted API infrastructure rather than managing and updating an open-source SDK dependency.
- Your project scope extends beyond Polymarket to include other prediction market platforms in a single unified feed.
When to Choose Poly SDK
Poly SDK is the clear practical choice for any developer who needs to build on Polymarket today. Its unified service architecture covers the full development surface — from market data queries and real-time orderbook streams to authenticated trading and on-chain conditional token management — all within a type-safe TypeScript codebase that reduces integration overhead and maintenance burden over time.
- You are building a Polymarket trading bot, analytics dashboard, or arbitrage system and need a production-ready, actively maintained library immediately.
- Your workflows require on-chain operations such as conditional token split, merge, redeem, or stablecoin swap handling alongside standard CLOB trading.
- You want open-source transparency, community-auditable code, and zero licensing cost for your prediction market tooling.
Verdict
For developers making a decision today, Poly SDK is the only viable option between these two tools. It is active, well-scoped, and addresses the full complexity of building on Polymarket with a single coherent library. Dome presents an interesting value proposition around multi-platform data aggregation, but without a live product, published documentation, or confirmed pricing, it cannot be meaningfully evaluated or recommended for any active project. Revisit Dome once it launches and its feature set can be assessed against real developer needs — until then, Poly SDK remains the substantive choice for Polymarket development work.