Chainlink just shipped one of those quiet infrastructure upgrades that most people won’t notice but every DeFi developer will appreciate. The oracle network’s Time-Weighted Average Price feeds are now live on mainnet, giving developers access to averaged pricing data that’s significantly harder to manipulate than traditional single-snapshot price feeds.
The TWAP feeds went live at approximately 19:55 UTC on July 31, with two variants: a 30-second window and a 60-second window.
How it works and who’s using it first
The feeds are accessible through Chainlink Data Streams, meaning developers who already have credentials can start 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, the prediction market platform, is the first major adopter. The platform plans to shift its crypto up/down markets to TWAP-based settlement starting August 7 at 00:00 UTC.
The 30-second TWAP feeds are designated for 5-minute markets. The 60-second feeds handle 15-minute and 4-hour markets.
Polymarket is also launching a separate Real-Time Data Streaming WebSocket on August 4, giving developers another pathway to access the feeds. Until that full RTDS delivery is live, adjustments to the feeds could still be made, essentially treating the window between now and August 4 as a final calibration period.
Why TWAP matters for DeFi and prediction markets
Single-snapshot pricing has a well-documented problem. If you settle a market based on the price at one exact moment, anyone with enough capital can briefly push the price in their favor right before settlement. TWAP feeds solve this by averaging prices across a defined time window. A bad actor would need to sustain artificial price pressure for the entire averaging period, which is dramatically more expensive and difficult than manipulating a single data point.
To incentivize the transition, Polymarket is putting $1 million in liquidity incentives on the table across its affected markets throughout August.
Chainlink’s expanding data services
Testnet versions of these feeds were previously available, giving developers time to build and test integrations before the mainnet launch.