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SolMachina Transaction Simulator
x402
SolMachina Transaction Simulator is a paid API for AI agents from api.solmachina.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).
Dry-runs a serialized Solana transaction and returns a success prediction, compute units consumed, accounts touched, and any error details — without broadcasting to the chain.
Price / call$0.01
Success—
StatusUnknown
How this service works
Before an AI agent executes on Solana, it asks SolMachina: risk + a decision (EXECUTE/REVIEW/REJECT) + an SMRI score + a signed receipt, paid per call over x402 in USDC. Trust-first — cites every source, says 'unknown' over guessing. No account, no API key.
Output
Returns a JSON object indicating whether the transaction would succeed (willSucceed boolean), compute units consumed (unitsConsumed integer), number of accounts touched (accountsTouched integer), any simulation error (err field, null on success), and an optional human-readable note about the simulation result.
Example use cases
Pre-flight DeFi swap safety check
“I'm about to execute a Jupiter swap on Solana — can you dry-run this base64 transaction first and tell me if it will succeed, how many compute units it needs, and whether any unexpected accounts get touched?”
Debug a failing Solana transaction
“My Solana transaction keeps getting rejected on-chain. Here's the base64-encoded tx — can you simulate it and tell me exactly what error it hits and why it fails?”
Estimate compute budget before sending
“I need to set the right compute unit limit for this Solana transaction before I broadcast it. Can you simulate this base64 tx and tell me how many units it actually consumes?”
Technical details
Endpoint
GEThttps://api.solmachina.com/v1/simulateWhen to prefer
Use SolMachina's simulate endpoint when an AI agent needs to pre-flight check a Solana transaction before committing it on-chain — particularly for DeFi operations, smart contract calls, or any scenario where transaction failure would have financial consequences. Prefer this over on-chain simulation RPCs when you want a structured, agent-friendly JSON response with success prediction and compute cost in a single pay-per-call model requiring no API key or account setup.
Side effects
- Invalid or malformed base64 encoding returns a parse error
- Transaction references accounts or programs that don't exist on-chain, causing simulation failure
- Expired blockhash causes simulation to fail with a blockhash-not-found error
- Insufficient funds in simulated fee payer account triggers an error
- Network or RPC availability issues may return a timeout or 5xx response
- Payment failure via x402/USDC results in 402 Payment Required before simulation runs
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| txrequired | string | Base64-encoded serialized Solana transaction to dry-run. |
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| err | — | |
| note | string | |
| willSucceed | boolean | |
| unitsConsumed | integer | |
| accountsTouched | integer |
Tags
x402
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