Chainlink Launches TWAP Mainnet Feeds, With Polymarket as First Major Adopter
Key Takeaways
- •Chainlink deployed TWAP feeds on mainnet on July 31, providing 30-second and 60-second averaging windows through its pull-based Data Streams oracle infrastructure.
- •Polymarket is the first major platform to adopt the new feeds, transitioning its crypto up/down markets to TWAP-based settlement starting August 7.
- •TWAP feeds mitigate oracle manipulation by averaging prices over a time window, making attacks far more costly than exploiting single-snapshot price data.
- •Access to select feeds begins at $150 per month, with documentation and SDK examples available through Chainlink and Polymarket developer resources.
- •Polymarket is allocating $1 million in liquidity incentives across affected markets throughout August to encourage adoption of the new feeds.
Chainlink has deployed its Time-Weighted Average Price (TWAP) feeds on mainnet, providing developers with averaged pricing data designed to be significantly more resistant to manipulation than traditional single-snapshot price feeds.
The TWAP feeds went live at approximately 19:55 UTC on July 31, offering two variants: a 30-second window and a 60-second window. The launch extends Chainlink Data Streams, the protocol's pull-based, low-latency oracle infrastructure, which delivers data on-demand rather than through push-based on-chain updates used by Chainlink's legacy price feeds.
Access and Pricing
The feeds are accessible through Chainlink Data Streams, allowing developers with existing credentials to begin integrating immediately. Documentation, feed IDs, and SDK examples are available through data.chain.link and Polymarket's developer resources. Pricing starts at $150 per month for select feeds.
Polymarket Becomes First Major Adopter
Polymarket, the prediction market platform, is the first major platform to adopt the new feeds. The platform plans to transition its crypto up/down markets to TWAP-based settlement beginning August 7 at 00:00 UTC.
Under the new setup, 30-second TWAP feeds will service 5-minute markets, while 60-second feeds will handle 15-minute and 4-hour markets.
Polymarket is also launching a separate Real-Time Data Streaming (RTDS) WebSocket on August 4, giving developers an additional pathway to access the feeds. Until full RTDS delivery is operational, adjustments to the feeds may still occur, effectively treating the period between the mainnet launch and August 4 as a final calibration window.
Why TWAP Matters for DeFi and Prediction Markets
Single-snapshot pricing carries a well-documented vulnerability: when a market settles based on the price at one exact moment, an actor with sufficient capital can temporarily push the price in their favor immediately before settlement. Oracle manipulation attacks have been a recurring issue across DeFi, with several protocols losing funds to attackers who exploited momentary price discrepancies. TWAP feeds address this by averaging prices across a defined time window. Manipulating a TWAP feed would require sustaining artificial price pressure for the entire averaging period, making it dramatically more expensive and difficult than exploiting a single data point.
The concept itself is not new—TWAP mechanisms are already used natively in major DeFi protocols such as Uniswap—but Chainlink's implementation delivers pre-computed, aggregated pricing as an externally verifiable oracle feed, sparing developers from building and maintaining their own averaging logic on-chain.
To incentivize the transition, Polymarket is allocating $1 million in liquidity incentives across its affected markets throughout August.
Prior Testnet Availability
Testnet versions of the TWAP feeds were previously available, giving developers the opportunity to build and test integrations ahead of the mainnet launch.