Chainlink Historical Feed Data

Download historical Chainlink feed data for the 7 coins used in Polymarket Up/Down markets as daily Parquet files for research and backtesting. This is not Polymarket proxy data.

2026-06-07

available since

daily

update

7 coins

Polymarket coverage

Endpoint

https://api.pmdata.dev/chainlink/BTCUSD/streams/BTCUSD_streams_2026-08-01.parquet

Chainlink Historical Feed Data Sample

Preview price, bid, ask, and timestamp fields for Chainlink feeds covering the 7 coins used in Polymarket Up/Down markets. Historical data is available since June 7, 2026.

#	symbol	observationsTimestamp	receiveMicrosecondTimestamp	price	bid	ask	validFromTimestamp	expiresAt	version
1	BTCUSD	1784332799000000	1784332800349415	63890.200665	63889.507500670962	63891.283071553547	1784332799000000	1786924799000000	V3
2	BTCUSD	1784332800000000	1784332800881333	63890.208635	63889.510002129325	63891.32725584467	1784332800000000	1786924800000000	V3
3	BTCUSD	1784332801000000	1784332801914702	63892.01064417973	63891.558179044448	63893.854902555575	1784332801000000	1786924801000000	V3
4	BTCUSD	1784332802000000	1784332802947702	63892.45917	63892.188423924135	63895.11039557598	1784332802000000	1786924802000000	V3
5	BTCUSD	1784332803000000	1784332804035618	63892.46371	63892.08634050158	63895.18344439466	1784332803000000	1786924803000000	V3
6	BTCUSD	1784332804000000	1784332805078222	63892.714551722895	63892.588339527765	63895.12889	1784332804000000	1786924804000000	V3
7	BTCUSD	1784332805000000	1784332806130136	63892.79377403508	63892.767907593125	63895.0083121860675	1784332805000000	1786924805000000	V3
8	BTCUSD	1784332806000000	1784332807237022	63892.8049349667475	63892.779887086055	63895.016624512785	1784332806000000	1786924806000000	V3

Raw price data received from the Chainlink WebSocket stream, not the Polymarket proxy. Since 2026-06-07

Download Sample See Schema

Need Chainlink TWAP data?

See Chainlink 30s/60s TWAP data. After August 7, 2026, Polymarket Up/Down markets use Chainlink TWAP data as their resolution source.

API Example

import requests

api_key = "<YOUR_API_KEY>"
symbol = "BTCUSD"
data_type = "streams"
data_date = "2026-08-01"

file_name = f"{symbol}_{data_type}_{data_date}.parquet"
url = f"https://api.pmdata.dev/chainlink/{symbol}/{data_type}/{file_name}"

response = requests.get(url, headers={"api_key": api_key}, timeout=300)
response.raise_for_status()

with open(file_name, "wb") as output:
    output.write(response.content)