JA4 t13d1011h2_61a7ad8aa9b6_3fcd1a44f3e3

t13d1011h2_61a7ad8aa9b6_3fcd1a44f3e3

ClaudeBot — inferred from the User-Agent on its requests.

What this fingerprint encodes

Transport

TCP

TLS version

TLS 1.3

Server name

server name sent

Cipher suites offered

10

Extensions offered

11

ALPN

h2

The hello it was computed from

Recovered because the proxy now stores the pre-hash JA3 string alongside the digest. Every number below came out of this client's ClientHello; anything we cannot name in the IANA registry is shown as its raw value rather than guessed at.

Version

TLS 1.2

Cipher suites 10

• TLS_AES_256_GCM_SHA384
• TLS_AES_128_GCM_SHA256
• TLS_CHACHA20_POLY1305_SHA256
• TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
• TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
• TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256
• TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
• TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
• TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256
• TLS_EMPTY_RENEGOTIATION_INFO_SCSV

Extensions 11

• ec_point_formats
• session_ticket
• server_name
• status_request
• key_share
• application_layer_protocol_negotiation
• psk_key_exchange_modes
• supported_versions
• signature_algorithms
• extended_master_secret
• supported_groups

Named groups 3

• x25519
• secp256r1
• secp384r1

Point formats 1

• uncompressed

771,4866-4865-4867-49196-49195-52393-49200-49199-52392-255,11-35-0-5-51-16-45-43-13-23-10,29-23-24,0

Seen in live traffic

Connections

70

First seen

2026-09-04 04:39 UTC

Last seen

2026-10-15 03:59 UTC

Transport

TCP

JA3 hashes absorbed

49

The same client, 49 different JA3s

This one JA4 covers 49 distinct JA3 hashes. A JA3 hashes the cipher and extension lists in the order they arrived, so a client that shuffles them — which Chrome and its derivatives do on purpose — produces a new JA3 almost every connection and fragments into what looks like 49 unrelated clients. JA4 sorts those lists before hashing, which is why all of it lands here instead.

• 19e6f0c39d330c82cfed95d0eb5198b7
• 956643144d55cc3ac950ec666bd51b78
• 0cf43e116936d3dbc6a57851f23be8f9
• 78a1a59f4328866588fc2ac4dc6adc36
• a348edf117d7042b78a0bda3cbd96a7d
• 78ea2bd6948eca610c674d1129d8625d
• 39fc1b30dc0e00541b5866f24cfc2724
• ff3314e2e1da255d3f64e3761bd7d580
• e29eba539516ce86b7966a168acf7d50
• 29fc58433a9e541ed4424fbee7dc577d
• 026bac76063c1f56f2a033e3f386ac79
• ba6f5dbbaa4139442d6e571a71d2004d
• … and 37 more

User-Agents seen on this fingerprint

• Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com) 110×
• Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; Reflectionbot/1.0; +https://reflection.ai/bot) Chrome/151.0.0.0 Safari/537.36 5×
• PQCrypta-Discovery-Agent/1.0.45 4×
• Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36 4×
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36; compatible; OAI-SearchBot/1.4; +https://openai.com/searchbot 3×
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36; compatible; OAI-SearchBot/1.4; robots.txt; +https://openai.co 3×
• Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36 (compatible; AionBot/1.0) 3×
• Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; GPTBot/1.4; +https://openai.com/gptbot) 2×
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.2 Safari/605.1.15 2×
• Mozilla/5.0 (compatible; ExaSearchBot/1.0; +https://crawler.exa.ai/) 1×
• Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0 Safari/537.36 1×
• crusader-worker/1.0 1×
• Mozilla/5.0 (compatible; Reflectionbot/1.0; +https://reflection.ai/bot) 1×

A User-Agent is self-declared and trivially forged, so this names an observation rather than proving an identity. It is still the strongest signal available: the fingerprint comes off the TLS handshake and the User-Agent off the request that followed, and one client build keeping a stable JA4 while changing what it calls itself is a finding in its own right.

This entry is an observation, not a policy decision. It is here because the edge saw it, not because anyone reviewed it, and it blocks nothing on its own. Only the curated tier drives classification and banning.