getLatestBlockhash

Success excludes calls the provider does not implement — an optional method a provider declines to offer is a capability fact, not a failure, and is never scored as one.

Median latency per hour. Gaps are periods with no measurement, drawn as gaps rather than joined across — a line through missing data invents a measurement that was never taken.

A degradation is a bucket where a provider fell away from ITS OWN median for this method over the window, not from the cohort's. A provider that is consistently slower than its peers is not degraded — it is slower, which the ranking already says. Buckets with fewer than 20 samples are skipped, because a claim about a provider cannot rest on a handful of calls, and adjacent bad buckets are merged so one outage reads as one incident.

Runnable as written, against a keyless public endpoint. Nothing here needs an API key.

curl -s https://api.mainnet-beta.solana.com \
  -H 'content-type: application/json' \
  -d '{"jsonrpc":"2.0","id":1,"method":"getLatestBlockhash","params":[{"commitment":"processed"}]}'

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "getLatestBlockhash",
  "params": [{ "commitment": "processed" }]
}

{
  "jsonrpc": "2.0",
  "result": {
    "context": { "apiVersion": "2.1.11", "slot": 372145830 },
    "value": {
      "blockhash": "EkSnNWid2cvwEVnVx9aBqawnmiCNiDgp3gUdkDPTKN1N",
      "lastValidBlockHeight": 372145980
    }
  },
  "id": 1
}