chainpeek: OHLCV candles for ETH (WETH/USDC) or BTC (cbBTC/USDC) in USDC, computed from public Uniswap v3 swaps on Base: per candle t (UTC start, unix seconds), open, high, low, close, volume_base, volume_quote and swaps, at 5m, 15m, 1h, 4h or 1d, with the pool address, fee tier, the block the data is current to and a source note. Input: pair (WETH/USDC or cbBTC/USDC), optional interval (5m, 15m, 1h, 4h or 1d; default 1h) and limit (1-200 candles, default 48; lookback caps: 5m and 15m 200, 1h 168, 4h 42, 1d 30). Computed by Tanod from the public Swap events of one allow-listed Uniswap v3 pool on Base (WETH/USDC 0.3%, cbBTC/USDC 0.05%; source: "Uniswap v3 swaps on Base (on-chain)"), not an exchange feed: DEX prices can differ from centralized exchanges (fees, arbitrage lag, MEV trades, stablecoin depegs). Bucketed by block timestamp in UTC; a candle without swaps carries the previous close with zero volume, and the last candle is still forming. Informational only, not investment advice. Data is current to within about a minute (as_of). An unknown pair or interval, or a limit over the interval's lookback cap, is a 422 before any payment (not charged). A pool whose swap history is still being indexed (after a restart) is a 503 warming_up, failing chain reads a 503 rpc_unavailable (not charged; retry later). Typically under 0.1 s (served from an index kept current in the background). Price: USD 0.003. Free: 10 chain reads per IP per UTC day (every chainpeek read, the sanctions screen and the single URL check share one pool).