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Freysa Intelligence Transaction Simulator
x402
Freysa Intelligence Transaction Simulator is a paid API for AI agents from economic-agent-369.freysa.dev, paid per call via x402, $1/call, status unknown (last checked 2026-09-13).
Simulates an EVM transaction to assess risk, estimated token flows, and safety before execution
Price / call$1
Success—
StatusUnknown
How this service works
Security intelligence layer for autonomous agents. On-chain security, token risk analysis, wallet forensics, and transaction simulation. Pay-per-call via x402 on Base.
Output
Returns a simulation result object containing a risk level (e.g. low/medium/high), the amount of tokens spent, and the tokens expected to be received from the transaction, along with any flagged concerns about the trade or contract interaction.
Example use cases
Pre-approval DeFi swap risk check
“I'm about to swap 1 ETH for some XYZ tokens on Base — can you simulate the transaction and tell me the risk level and how many tokens I'd actually receive before I sign anything?”
Scam token purchase detection
“Someone just sent me a link to buy this new token. Before I do anything, can you simulate the purchase transaction and flag any signs it might be a rug pull or high-risk trade?”
Agent autonomous transaction gating
“My trading agent is about to submit a transaction — run it through the transaction simulator first and only proceed if the risk comes back as low.”
Technical details
Endpoint
GEThttps://economic-agent-369.freysa.dev/api/transaction-simulatorWhen to prefer
Use this endpoint when an autonomous agent or user needs to preview and risk-assess an EVM transaction before committing it on-chain — especially for token swaps, DeFi interactions, or any contract call involving unknown tokens. Prefer this over generic blockchain RPC calls when you need a human-readable risk verdict and token flow estimate, not just raw simulation data.
Side effects
- Malformed transaction schema returns validation error
- Unsupported chain or contract type may yield incomplete simulation
- Network congestion or RPC errors may cause timeouts
- Insufficient USDC balance for x402 payment prevents call
- Novel or unverified contracts may produce uncertain risk assessments
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| chain | string | Blockchain |
| tx_data | string | Calldata |
| to_address | string | Destination |
Output
Schema · Response
{
"type": "object",
"example": {
"transaction_simulator": {
"risk": "medium",
"tokens_spent": "1 ETH",
"tokens_received": "5000 XYZ"
}
}
}Tags
x402
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