Docs · method · EVM

eth_simulateV1

Units per call2 (heavy)
Cachenever
RuleHeavy (2 units). Availability per chain is measured, not promised.
ChainsEthereum Mainnet · Base Mainnet · Arbitrum One · OP Mainnet · Polygon PoS
Specificationhttps://ethereum.github.io/execution-apis/api-documentation/

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_simulateV1","params":["0x<hash>"]}'

When the rule applies — the exact answer

HTTP 404, JSON-RPC code -32601. The body says what to do next and carries a request id you can file as a ticket.

{
  "error": {
    "code": -32601,
    "message": "eth_simulateV1 isn't served on this chain yet — 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

How many units does eth_simulateV1 cost?

2 units per call (heavy class).

All methods: methods and limits · docs · AI agents: the same call is the rpc_call MCP tool.