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Songbird Testnet Coston

https://coston-api.flare.network/ext/C/rpc

Songbird Testnet Costonevmflare.network· coston-apicompare ↔● fastest right now
Posture score
83
Speed score
50
TLS version
TLS 1.3
Cipher
TLS_AES_128_GCM_SHA256
KEX group
classical
PQ class
Classical only
ALPN
h2
Cert expires in
47d
Session resumed
yes
TLS handshake
326ms
Resumption
205ms
TTFB
1.40s
RPC block height
54,793,424
TLS handshake
VersionTLS 1.3
CipherTLS_AES_128_GCM_SHA256
KEX groupclassical
ALPNh2
PQ classClassical only
Handshake326ms
Resumed?yes · 205ms
OCSP stapledno
SCTs presentno
Certificate chain
Subjectcoston-api.flare.network
IssuerWR3
Key typeRSA-2048
Chain length3
SANscoston-api.flare.network
Not before2026-08-28
Not after2026-11-26
Days to expiry47d
Chain SHA-256c342bfc4c480c88c…
Misconfigurations
  • OCSP stapling not enabled no_ocsp_staple
Grades
Posture
B83
Speed
F50
Certificate
100
TLS profile
95
Post-quantum
40
RPC reachability
100
Endpoint identity
URL
https://coston-api.flare.network/ext/C/rpc
Host
Chain ID
16
VM
evm
Platform type
chain
Live probe (last 24 h)
Probes attempted
-
Successful
-
Success rate
-
Median p50
-
Median p95
-
Latest bucket
-
TLS posture (post-quantum)full history →
Class
Classical only
Key exchange
-
Cipher
TLS_AES_128_GCM_SHA256
Last seen
2026-10-10T03:27:33.53396927Z
History (30 days)
no history
Chain peer ranking
This URL is fastest right now
YES
Fastest p50 latency
1.40s
Latest block height
-
Using this RPCtabs auto-fill the URL + chain ID
JSON-RPC eth_chainId, which verifies the endpoint is alive and reports the chain ID.
curl -X POST 'https://coston-api.flare.network/ext/C/rpc' \
  -H 'content-type: application/json' \
  -d '{"jsonrpc":"2.0","method":"eth_chainId","params":[],"id":1}'
Scan reportschema rpcscan-report · captured 2026-10-10T07:44:51.493Z
SHA-256 of canonical content
computed in your browser
computing…

The hash covers every field above the JSON serialization with sorted keys. Re-running this computation against the downloaded artifact must produce the same hash; that's how RPCScan's future on-chain proofs (rpcscanchain) will let anyone verify a published snapshot wasn't tampered with.