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TLS & HTTP/2 Fingerprint

The connection as caesium sees it: through tungsten this is the tungsten→origin leg; direct, the client itself. Reload to refresh (new connections re-handshake). Append ?format=json for machine-readable output.

Fingerprints

JA3771,4866-4865-4867-49196-49195-52393-49200-49199-52392-255,45-11-0-10-5-23-13-16-43-51-35,29-23-24,0
JA3 hash743367a9d360e7c5c50152d13336d921
JA3N hash24dd0f987266c37f39231f6f2130d12e
JA4t13d1011h2_61a7ad8aa9b6_3fcd1a44f3e3
JA4_rt13d1011h2_00ff,1301,1302,1303,c02b,c02c,c02f,c030,cca8,cca9_0005,000a,000b,000d,0017,0023,002b,002d,0033_0503,0403,0807,0806,0805,0804,0601,0501,0401
HTTP/2 (Akamai)2:0;4:2097152;5:16384;6:16384|5177345|0|m,s,a,p

Negotiated TLS

TLS versionTLS 1.3
Cipher suiteTLS13_AES_256_GCM_SHA384
Key-exchange groupX25519
ALPNh2

ClientHello

Record versionTLS 1.0 (0x0301)
Legacy versionTLS 1.2 (0x0303)
SNIcaesium.menlotest.com
ALPNh2, http/1.1

Ciphers (wire order)

0TLS_AES_256_GCM_SHA384 (0x1302)
1TLS_AES_128_GCM_SHA256 (0x1301)
2TLS_CHACHA20_POLY1305_SHA256 (0x1303)
3TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384 (0xc02c)
4TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 (0xc02b)
5TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256 (0xcca9)
6TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (0xc030)
7TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (0xc02f)
8TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256 (0xcca8)
9TLS_EMPTY_RENEGOTIATION_INFO_SCSV (0x00ff)

Extensions (wire order)

0psk_key_exchange_modes (45)
1ec_point_formats (11)
2server_name (0)
3supported_groups (10)
4status_request (5)
5extended_master_secret (23)
6signature_algorithms (13)
7application_layer_protocol_negotiation (16)
8supported_versions (43)
9key_share (51)
10session_ticket (35)

Supported groups

0x25519 (29)
1secp256r1 (23)
2secp384r1 (24)

Key shares

0x25519 (29)

Signature algorithms

0ecdsa_secp384r1_sha384 (0x0503)
1ecdsa_secp256r1_sha256 (0x0403)
2ed25519 (0x0807)
3rsa_pss_rsae_sha512 (0x0806)
4rsa_pss_rsae_sha384 (0x0805)
5rsa_pss_rsae_sha256 (0x0804)
6rsa_pkcs1_sha512 (0x0601)
7rsa_pkcs1_sha384 (0x0501)
8rsa_pkcs1_sha256 (0x0401)

Supported versions

0TLS 1.3 (0x0304)
1TLS 1.2 (0x0303)

EC point formats

0uncompressed (0)

HTTP/2 preface

SETTINGS2:0; 4:2097152; 5:16384; 6:16384
WINDOW_UPDATE5177345
PRIORITY frames(none)
Pseudo-header orderm,s,a,p

HTTP request

MethodGET
HTTP versionHTTP/2.0
Peer IP216.73.216.124
accept*/*
user-agentMozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
accept-encodinggzip, br, zstd, deflate