assay

Verify that a crypto payment actually settled, and for how much. Catches payments that report success but delivered less than they claim, including XRP partial payments, Ethereum fee-on-transfer tokens, Algorand close-remainder sweeps, Bitcoin replace-by-fee, missing Solana token accounts and unassociated Hedera tokens. Returns the true delivered amount plus warnings explaining exactly what to do. Supports 20 chains: xrp, hedera, algorand, solana, ethereum, base, arbitrum, optimism, polygon, bnb, avalanche, linea, scroll, zksync, blast, mantle, celo, gnosis, bitcoin, litecoin. READ ONLY. Never moves funds, never holds keys, no account or API key needed.