# paradigmxyz/cryo

cryo is the easiest way to extract blockchain data to parquet, csv, json, or python dataframes

Repository: https://github.com/paradigmxyz/cryo
Canonical: https://ross.abutalabs.com/products/cryo
Language: Rust
License: Apache-2.0
License Family: permissive
Topics: crypto, ethereum, evm, parquet, rust
Last push: 2025-01-08T07:31:22+00:00

## Health v2 (maintenance only)
Score: 19/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 8, longevity 83
- inputs: {"age_days": 1164, "days_push": 602, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1580, forks 185 (observed 2026-08-28T04:05:06.882418+00:00)

## What it is
cryo is a Rust-based CLI tool (also available as a Python package) that extracts Ethereum/EVM blockchain data into parquet, csv, , or Python dataframes. It offers flexible options for filtering, formatting, and controlling extraction from an RPC node.

## Use cases
- extract all ethereum logs between two block ranges to parquet
- download blocks transactions and traces as csv files
- pull all USDC contract events into a python dataframe
- export blockchain data to  for analysis
- backfill missing datasets like blocks txs and traces from an archive node
- extract only specific columns from blockchain datasets

## When to choose
- you need bulk EVM blockchain data in parquet/csv//dataframe formats
- you run your own node or archive node and want fast local extraction
- you want a simple CLI or Python API for blockchain ETL

## When to avoid
- you only have a third-party RPC provider without careful rate limiting, since default settings can overwhelm it
- you need non-EVM blockchains
- you need a fully stable production tool, as it is an early work-in-progress

## Facets
- artifact type: cli-tool
- maturity: active
- function: etl, cli, data-science, database
- domain: blockchain, analytics
- platform: cli, python, rust, cross-platform
- tags: ethereum, evm, blockchain-data, parquet, web3, data-extraction, cryptocurrency, data-engineering, command-line

## Member repositories
- paradigmxyz/cryo (main) score 19

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:06.882418+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T03:56:37.401602+00:00, confidence not recorded.
  - readme: https://github.com/paradigmxyz/cryo (fetched 2026-08-28T04:05:06.882418+00:00, sha c929fd364c50)
- Data as of 2026-08-30T08:39:29.467469+00:00.