primpvshttp-2
Primp is a Python HTTP client that impersonates real web browsers by replicating their TLS fingerprints, HTTP/2 settings, and header ordering. It is a lightweight alternative to curl-cffi for bypassing TLS and HTTP fingerprinting-based bot detection.
Key features include:
- Browser impersonation Can impersonate Chrome, Firefox, Safari, Edge, and OkHttp clients by replicating their exact TLS fingerprints (JA3/JA4), HTTP/2 frame settings, header ordering, and other connection-level characteristics.
- HTTP/2 support Full HTTP/2 support with configurable settings that match real browser behavior.
- Lightweight Smaller and simpler than curl-cffi while providing similar impersonation capabilities. Built on Rust for performance.
- Familiar API Provides a requests-like API with Session support, making it easy to adopt for developers familiar with the Python requests library.
- Proxy support HTTP and SOCKS5 proxy support with authentication.
- Cookie management Automatic cookie handling across requests within a session.
Primp fills a similar niche to curl-cffi and hrequests — HTTP clients designed to avoid TLS/HTTP fingerprinting — but takes a Rust-powered approach for better performance. It is particularly useful when you need to bypass bot detection that relies on connection-level fingerprinting without using a full browser.
Pure Ruby, framework and transport agnostic, implementation of HTTP/2 protocol and HPACK header compression with support for:
- Binary framing parsing and encoding
- Stream multiplexing and prioritization
- Connection and stream flow control
- Header compression and server push
- Connection and stream management
- And more... see API docs
Protocol specifications:
- Hypertext Transfer Protocol Version 2 (RFC 7540)
- HPACK: Header Compression for HTTP/2 (RFC 7541)
Highlights
bypasstls-fingerprinthttp-fingerprinthttp2fast
http2
Example Use
```python
import primp
# Create a session that impersonates Chrome
session = primp.Session(impersonate="chrome_131")
# Make requests - TLS fingerprint matches real Chrome
response = session.get("https://example.com")
print(response.status_code)
print(response.text)
# POST with JSON data
response = session.post(
"https://api.example.com/data",
json={"key": "value"},
)
# With proxy
session = primp.Session(
impersonate="firefox_133",
proxy="http://user:pass@proxy.example.com:8080",
)
response = session.get("https://example.com")
# Different browser impersonation profiles
for browser in ["chrome_131", "firefox_133", "safari_18", "edge_131"]:
session = primp.Session(impersonate=browser)
resp = session.get("https://tls.peet.ws/api/all")
print(f"{browser}: {resp.json()['ja3_hash']}")
```
```ruby
require 'http/2'
# GET request
client = HTTP2::Client.new
response = client.get("https://httpbin.org/get")
puts response.body
# POST reuqest
data = { name: "value" }
response = client.post("https://www.example.com", data)
```