specters 4.2.3

Python bindings for Specter, a Chrome-accurate HTTP client with TLS, HTTP/1.1, HTTP/2, HTTP/3, and WebSocket fingerprinting. Improved TTFT and TPS for LLMs.

Specter

Python bindings for the Specter HTTP client with TLS, HTTP/2, HTTP/3, RFC 6455 WebSocket, and RFC 8441 Extended CONNECT support.

Supported Chrome fingerprints are specter.FingerprintProfile.Chrome142 through specter.FingerprintProfile.Chrome148. Supported Firefox fingerprints are specter.FingerprintProfile.Firefox133 through specter.FingerprintProfile.Firefox151, plus ESR branches FirefoxEsr115, FirefoxEsr128, and FirefoxEsr140; examples use Chrome148, the latest implemented Chrome profile.

Installation

pip install specters

HTTP

Synchronous HTTP:

import specter

builder = specter.SyncClient.builder()
builder.fingerprint(specter.FingerprintProfile.Chrome148)
client = builder.build()

response = client.get("https://example.com/").send()
print(response.status)
print(response.text())

Async HTTP:

import specter

builder = specter.AsyncClient.builder()
builder.fingerprint(specter.FingerprintProfile.Chrome148)
client = builder.build()

response = await client.get("https://example.com/").send()
print(response.status)
print(response.text())

RFC 6455 WebSockets

import specter

builder = specter.Client.builder()
builder.cookie_store(True)
client = builder.build()

ws_builder = client.websocket("wss://example.com/socket")
ws_builder.subprotocol("chat.v1")
ws = await ws_builder.connect()

await ws.send_text("hello")
message = await ws.next()
await ws.close(specter.CloseFrame(specter.CLOSE_NORMAL, "done"))

RFC 8441 HTTP/2 Tunnels

import specter

builder = specter.Client.builder()
builder.http2_prior_knowledge(True)
client = builder.build()

tunnel = await client.websocket_h2("https://example.com/h2-tunnel").open()
await tunnel.send_bytes(b"raw bytes", end_stream=False)
data = await tunnel.recv_bytes()
await tunnel.close_send()

RFC 6455 framed WebSockets and RFC 8441 raw HTTP/2 tunnels are separate APIs by design.

License

MIT