Solana Transaction Preview & Pre-Sign Safety Check

API ↗

Solana Transaction Preview & Pre-Sign Safety Check is a paid API for AI agents from solana-x402-microtools-mainnet.valecity.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-28).

Simulates a Solana transaction before signing to surface SOL/SPL balance changes, programs invoked, fee estimates, red flags, and an optional intent-matching verdict (clear/caution/avoid)

How this service works

Solana transaction preview BEFORE signing: simulate an unsigned or signed legacy/v0 transaction (address lookup tables resolved) and get SOL and SPL/Token-2022 balance changes for your wallet, programs invoked (known/unknown), fee estimate and red flags (token approvals, authority/owner changes, close-to-other, wallet reassign, >90% SOL loss, simulation failure). JSON body. Optional Pre-Sign Brief (schema 1.0): pass intent (e.g. 'swap 0.002 SOL for USDC', 'send 0.001 SOL to <address>') and/or context {type, ticker, mint}; get verdict clear|caution|avoid with reasons, intent_match, verified xStocks tokenized-equity check, priority-fee market hint (micro-lamports/CU) and a sha256 brief_hash.

Output

Returns simulated SOL and SPL/Token-2022 balance changes for the specified wallet, a list of programs invoked (labeled known or unknown), estimated transaction fee, and red flags such as token approvals, authority/owner changes, close-to-other instructions, wallet reassignment, or >90% SOL loss. With optional intent and context fields, also returns a verdict of clear/caution/avoid with reasons, intent_match boolean, xStocks mint verification status, priority-fee market hint in micro-lamports/CU, and a sha256 brief_hash for audit.