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The BlockDB Python SDK supports Python 3.x and covers all EVM API endpoints. The primary client is async (built on httpx); a synchronous wrapper is included for scripts and notebooks.

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Where it’s available

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Installation

pip install blockdb

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Quick examples

import asyncio
import os
from blockdb import BlockDbClient
from blockdb.evm.primitives import BlocksRequest

async def main():
    async with BlockDbClient(
        api_key=os.environ["BLOCKDB_API_KEY"],
    ) as client:
        page = await client.evm.primitives.get_blocks(
            BlocksRequest(
                chain_id=1,
                from_block=20_000_000,
                to_block=20_000_100,
                limit=100,
            )
        )
        for block in page.data:
            print(block.block_number, block.timestamp_utc)

asyncio.run(main())

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Prices example

import os
from blockdb import BlockDbClient

async with BlockDbClient(api_key=os.environ["BLOCKDB_API_KEY"]) as client:
    candles = await client.evm.prices.get_crypto_ohlc({
        "chain_id": 1,
        "base_token_address":  "c02aaa39b223fe8d0a0e5c4f27ead9083c756cc2",  # WETH
        "quote_token_address": "a0b86991c6218b36c1d19d4a2e9eb0ce3606eb48",  # USDC
        "from_block": 21_000_000,
        "to_block":   21_010_000,
    })
    for c in candles.data:
        print(c.open_timestamp, c.open, c.high, c.low, c.close)

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Pagination

Every endpoint returns a PagedResponse[T] with a cursor field. Use async_pages to iterate all pages automatically: 
import os
from blockdb import BlockDbClient

async with BlockDbClient(api_key=os.environ["BLOCKDB_API_KEY"]) as client:
    cursor = None
    while True:
        page = await client.evm.primitives.get_blocks(
            {"chain_id": 1, "from_block": 18_000_000, "to_block": 19_000_000, "cursor": cursor}
        )
        process(page.data)
        cursor = page.cursor
        if not page.has_more:
            break

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Configuration reference

import os
from blockdb import BlockDbClient
from blockdb._config import ClientConfig, RetryPolicy

client = BlockDbClient(
    api_key=os.environ["BLOCKDB_API_KEY"],
    config=ClientConfig(
        base_url="https://api.blockdb.io/v1",  # default
        timeout=30.0,
        connect_timeout=10.0,
        retry_policy=RetryPolicy(),
        max_requests_per_second=None,  # no limit by default
    ),
)
Create and rotate keys in dashboard.blockdb.io. See Authorization for BLOCKDB_API_KEY and best practices.
Last modified on April 22, 2026