eth_feeHistory

Example

curl -s https://flexyield.io/rpc/eth_mainnet \
  -H "Authorization: Bearer $FLEXYIELD_KEY" -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","id":1,"method":"eth_feeHistory","params":["0x10","latest",[25,50,75]]}'

When the rule applies — the exact answer

HTTP 400, JSON-RPC code -32602. The body says what to do next and carries a request id you can file as a ticket.

{
  "error": {
    "code": -32602,
    "message": "eth_feeHistory windows above 1024 blocks aren't served — if you need deeper fee history, tell us what you're building and we'll enable or tailor it for your project, usually within a day: hello@flexyield.io",
    "data": {
      "contact": "hello@flexyield.io",
      "docs": "https://flexyield.io/docs",
      "request_id": "<uuid>",
      "support": "/support/new?request_id=<uuid>"
    }
  }
}

Questions