User-Agent

Claude-User (claude-code/2.1.98; +https://support.anthropic.com/)

first seen 2026-10-26 12:49 · last seen 2026-10-26 12:49 · JSON

Last 7 days (1 observations)

Distinct clients per day (last 30 days, peak 1/day)

Distinct clients are counted by IP-hash per complete UTC day — unlike observation counts this is insensitive to one chatty client, but NAT merges clients and address rotation splits them.

Decomposed attributes

Browser / clientclaude-code 2.1.98
Device classbot
Declared URLhttps://support.anthropic.com/
Noteinferred from the self-declared string — a claim, not a measurement; compare with the wire fingerprints above

Co-observed signals

Signals from other families seen in the same observation. A fingerprint spread thinly across many lower-layer signatures is a classic inconsistency signal.

TLS ClientHello (JA4)

fingerprintco-occurrences
t13d521200_b262b3658495_ecd0401ec68b1

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn050000_2469c960a647_000000000000_0000000000001

TCP SYN (p0f)

fingerprintco-occurrences
4:50+14:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:01

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-4-8-1-3_1460_71

Country

fingerprintco-occurrences
FR · France1

Network (ASN)

fingerprintco-occurrences
AS15557 · Societe Francaise Du Radiotelephone - SFR SA1

TLS supported groups

fingerprintco-occurrences
11ec,001d,0017,001e,0018,0019,0100,0101 Match?Exact match in Thumbprint's published controlled catalog captures: node-fetch 24.22.1, python-httpx 0.28.1, python-requests 2.34.2, +2 more.The fingerprint page shows the full measured match list. More on the catalog.1