urllib3/urllib3

Health v2 · maintenance only

Adoption not part of the score

4051 stars · 1525 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

urllib3 is a user-friendly, powerful HTTP client library for Python with thread-safe connection pooling, SSL/TLS verification, retries, and proxy support. It underpins much of the Python HTTP ecosystem, including requests.

Use cases

• make http requests in python
• connection pooling for http clients
• upload files with multipart encoding
• retry failed http requests automatically
• send requests through http or socks proxies
• verify ssl/tls certificates in python

When to choose

• you need a robust low-level HTTP client with fine control over pooling, retries, and TLS
• you want a dependency-free alternative to requests with fewer abstractions
• you are building a library that other Python HTTP tools depend on

When to avoid

• you want a high-level requests-like API with sessions and simple defaults
• you need async HTTP support, which urllib3 does not provide natively
• you are already using a framework that bundles its own HTTP client

Facets

library · maturity stable

http-client caching security web-development developer-tools apis python cross-platform connection-pooling tls retries proxy-support multipart-upload

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