simulate_transaction
Simulates an unsigned Base transaction before signing and returns gas estimates, decoded top-level calls, approval warnings, and a machine-readable risk signal.
When an agent should call it
Read-only RPC simulation only. It never signs, holds keys, or broadcasts; internal token state changes are not exposed by standard RPC and are not claimed as decoded movements.
Input: Unsigned Base or Base Sepolia transaction fields (from, to, value in wei, calldata)
Price: $0.02 USDC per call, paid in USDC via x402 on Base.
MCP connection: one-time setup, then call simulate_transaction on each needed workflow.
Direct HTTP resource: https://mcp.dropenginehq.com/api/simulate-transaction
Example input
{
"chain": "base",
"from": "0x1111111111111111111111111111111111111111",
"to": "0x1111111111111111111111111111111111111111",
"value": "0",
"data": "0x"
}Each call requests payment for this tool only. The agent receives a structured result and decides what to do next. Check the limits above before acting on risk, market, freshness, or availability results.
MCP endpoint: https://mcp.dropenginehq.com/api/paid-mcp