# USDT Payment Verifier Stop delivering the wrong order to the wrong payer. | | | | --- | --- | | Version | 1.0.0 | | Price | 79 USD | | Licence | Single-seat | | Entry point | `server.py` | | Source | Reimplemented from scratch in English; TRC-20 and BEP-20 logic referenced from the local CLI without modifying it | ## What it does Read-only MCP server that checks a USDT payment record against an order on TRC-20 and BEP-20. A payment is accepted only when all of these hold: - the record is for the transaction you asked about (hash match) - the token is the official USDT contract for that network - the recipient matches exactly (TRON addresses are case-sensitive) - the amount matches exactly - the status is confirmed - the timestamp is present, not in the future and within the age limit (seconds and milliseconds both handled) - the hash is not in your list of transactions already delivered ## What it does not do It does not look the transaction up. You fetch the chain record from a source you trust (your own node, or a gateway you call yourself) and pass it in as `record_json`. The server then judges whether that record satisfies the order. It cannot tell a forged record from a real one, so never pass a record that came from the payer. Replay protection is stateless: you keep the list of delivered hashes and pass it as `already_used_json`. ## Tools | Tool | Description | | --- | --- | | `verify_payment` | Check one chain record against an order: same transaction, official USDT, exact recipient and amount, confirmed, fresh, not reused. | | `recent_orders` | Summarise recent transactions for a wallet. | | `wallet_status` | Report wallet address, network and read-only posture. Never signs. | ## Network Any outbound request is limited to these allow-listed gateways (the server itself makes none; the list governs a fetcher you wire in): `api.trongrid.io`, `tronscan.org`, `bsc-dataseed.binance.org`, `bsc-dataseed1.binance.org`. ## Security - Read-only: no file is written and no process is started. - Any outbound request must pass the host allow-list and the private-network guard. ## Requirements - Python 3.10 or above - No account, no API key, no telemetry ## Agent Skills | Skill | Purpose | | --- | --- | | `payment-verification-triage` | Confirm a USDT payment before delivering an order. | ## Tests ```bash python -m pytest -q # suite tests for this server ``` Every security claim above names a test that exists: - `test_ssrf_blocks_private_network` - `test_no_subprocess_spawn` - `test_read_only_policy_holds` ## Licence and exclusions - Single-seat licence unless a team licence is stated above. - No shell execution, no browser or account automation, no key custody. - The exclusion list is published in `security/EXCLUSIONS.md` in the team bundle so a reviewer can check it independently.