curl_cffi is a Python HTTP client built on libcurl that focuses on browser fingerprint impersonation to evade anti-bot detection. By replacing default TLS handshake and HTTP/2 settings with those extracted from real browsers like Chrome and Firefox, it allows HTTP requests that closely mimic actual browser traffic, reducing the likelihood of being blocked by services that fingerprint automated clients.
Beyond fingerprint impersonation, curl_cffi offers a dual API supporting both synchronous and asynchronous execution, with per-request proxy assignment, automatic retry with exponential backoff, and persistent session-based connection pooling. It also includes WebSocket connectivity, enabling real-time two‑way communication over an existing session—features that collectively give developers fine‑grained control over request behavior while maintaining a simple, requests‑like interface.
