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simulateBundle

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`simulateBundle` simulates the execution of an **ordered bundle** of Solana transactions exactly as they would run if landed back-to-back in a single block, and returns the per-transaction outcome — without submitting anything to the network. Use it to validate an MEV / atomic-arbitrage bundle (or any sequence of dependent transactions) before paying to send it with the bundle-submission methods.

Because the transactions are simulated **in order against the same working state**, later transactions in the bundle observe the account changes produced by earlier ones. This is the key difference from calling `simulateTransaction` on each transaction independently: a bundle that only succeeds atomically (for example, a swap that funds a later repay) can be validated as a whole.

This is a **pro-tier-only** method. It is rate-limited under the `sol_sim_bundle` category at 5 RPS (pro) / 15 RPS (business), with burst headroom of twice the sustained limit.

Parameters

This method takes no parameters.

Returns

simulateBundle return value
FieldType
resultobject

Examples

curl https://<your-endpoint>/ \
  -X POST -H 'Content-Type: application/json' \
  -d '{"jsonrpc":"2.0","id":1,"method":"simulateBundle","params":[]}'
const res = await fetch("https://<your-endpoint>/", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({
  "id": 1,
  "method": "simulateBundle",
  "params": [],
  "jsonrpc": "2.0"
}),
});
const data = await res.json();
import requests
resp = requests.post("https://<your-endpoint>/", json={"id":1,"method":"simulateBundle","params":[],"jsonrpc":"2.0"})
print(resp.json())

Usage

  1. Transport: HTTP (JSON-RPC).
  2. Networks: mainnet, devnet, testnet.
  3. Credit cost: 5 per call.

FAQ

What does simulateBundle do?
Dry-runs an MEV bundle — an ordered list of Solana transactions — against the current chain state without broadcasting any of them.
How many credits does simulateBundle cost?
simulateBundle costs 5 credit(s) per call on Triport by default.
Is simulateBundle available over WebSocket?
simulateBundle is an HTTP JSON-RPC method.