karpathy/cryptos resource
Pure Python from-scratch zero-dependency implementation of Bitcoin for educational purposes observed · 2026-08-28
Health v2 · maintenance only
32/100
- Activity 0
- Release rhythm 35
- Longevity 100
Flags: no_releases no_license
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-03. Adoption (stars, forks) is never an input.
- gap_med: n/a
- age_days: 1957
- days_rel: n/a
- days_push: 1899
- n_releases_24m: 0
Adoption not part of the score
1926 stars · 328 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded
A pure Python, zero-dependency from-scratch implementation of Bitcoin, including SHA-256, elliptic curve math, ECDSA signatures, key/address generation, and transaction parsing. It is written as an educational resource (with Jupyter notebooks) and is explicitly not intended for production use.
Use cases
- learn how bitcoin works under the hood
- understand sha-256 step by step
- study elliptic curve cryptography and ecdsa
- parse raw bitcoin transactions in python
- generate bitcoin key pairs and addresses from scratch
- teach a course on cryptocurrency internals
When to choose
- you want to learn or teach bitcoin and crypto primitives from first principles
- you need readable, dependency-free reference implementations of sha-256, elliptic curves, or ecdsa
- you want to experiment with bitcoin transaction structures in pure python
When to avoid
- you need a fast, secure, production-ready bitcoin library
- you want to handle real funds or mainnet transactions
- you need audited cryptographic code
Facets
learning-resource · maturity maintenance
cryptography serialization cli parser education python cli cross-platform bitcoin elliptic-curves sha256 ecdsa educational zero-dependency jupyter-notebook cryptocurrency algorithms
1 source
- readme: https://github.com/karpathy/cryptos · fetched 2026-08-28 · 0d10c076e0a6
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| karpathy/cryptos | main | 32 |
For agents
markdown · JSON · MCP: product_card(name="karpathy/cryptos")
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem