Buy verification credits with USDC, USDT, or BTC

Purchase verification credits by sending USDC, USDT, or BTC to the platform wallet (EVM USDC/USDT: 0xAd982CB19aCCa2923Df8F687C0614a7700255a23 — same on all chains; Solana USDC/USDT: 6a1mLjefhvSJX1sEX8PTnionbE9DqoYjU6F6bNkT4Ydr; Bitcoin BTC: bc1qg7qnerdhlmdn899zemtez5tcx2a2snc0dt9dt0; Tron USDT-TRC20: TC5yvwkAMakkXtUxYiu2Yn1xbBcwYuD6cn) and providing the transaction hash. Volume discounts: $5–$99 = 25 credits/$1 ($0.04/call), $100–$499 = 33 credits/$1 ($0.03/call, 25% off), $500+ = 50 credits/$1 ($0.02/call, 50% off). USDC and USDT accepted on EVM chains and Solana (auto-detected from transaction). USDT-TRC20 accepted on Tron. BTC accepted on Bitcoin (converted to USD at market rate, requires 1 confirmation). Crypto sent on unsupported chains cannot be recovered. All purchases are final and non-refundable. Sender verification: the first purchase registers the sender wallet address to the API key. Subsequent purchases must come from the same sender wallet. To change the registered wallet, include "updateWallet": true — the verified transfer from the new address proves ownership. updateWallet is ignored for wallet-auth callers (the SIWE signer is already bound to the registered wallet, and the soulbound pass cannot follow a wallet rotation). Authentication: this endpoint accepts EITHER the X-API-Key header OR the Authorization: Wallet header (SIWE envelope from a wallet that holds the Insumer Access pass). Wallet-auth callers let an SBT-holding agent top up without ever handling an API key.