# LIGHTHOUSE (МАЯК) — USDT freeze risk monitoring

> Checks whether a crypto address is at risk of a Tether USDT freeze or is already blacklisted, on Ethereum, Tron, Avalanche, Celo, Solana and TON. Warns before the freeze: Tether multisig proposals are visible on-chain minutes before execution. Available to AI agents via MCP and REST.

Live data: 11,177 blacklisted addresses, 5 freezes in the last 24 h, 4 open freeze proposals (as of 2026-11-15T22:23Z).

## Connect an AI agent (MCP)

- MCP endpoint (Streamable HTTP): https://usdtbanned.com/mcp — address checks, search and statistics work without sign-in; personal tools use OAuth 2.1 or an API key.
- Always-authenticated endpoint: https://usdtbanned.com/mcp/private — the client is asked to sign in on connect.
- ChatGPT: Settings → Apps/Connectors → Developer mode → Create → URL https://usdtbanned.com/mcp, authentication "OAuth" (or "No authentication" for public tools only).
- Claude: Settings → Connectors → Add custom connector → https://usdtbanned.com/mcp/private.
- Claude Code: claude mcp add --transport http mayak https://usdtbanned.com/mcp/private
- Cursor / VS Code / any client with headers: url https://usdtbanned.com/mcp, header "Authorization: Bearer mk_…" (API key from the Plans page).
- OAuth metadata: https://usdtbanned.com/.well-known/oauth-authorization-server, protected resource: https://usdtbanned.com/.well-known/oauth-protected-resource/mcp

## MCP tools

- check_address — Check USDT freeze risk
- check_addresses — Batch check USDT freeze risk
- get_freeze_statistics — USDT blacklist statistics
- search — Search LIGHTHOUSE
- fetch — Fetch LIGHTHOUSE record
- list_open_proposals — Open Tether freeze proposals (sign-in required)
- list_recent_freezes — Recent USDT freezes (sign-in required)
- get_account — My LIGHTHOUSE account (sign-in required)
- watchlist_list — My monitored addresses (sign-in required)
- watchlist_add — Add address to monitoring (sign-in required)
- watchlist_remove — Remove address from monitoring (sign-in required)
- get_plans — LIGHTHOUSE plans and payment methods
- create_order — Buy a LIGHTHOUSE plan with crypto
- submit_payment — Submit a USDT payment for an order
- get_order — Order status and API key

## Risk levels

- 0 — no risk; normal processing.
- 1 — freeze proposal open in a Tether multisig; hold incoming funds, pause withdrawals, review manually.
- 2 — second of three signatures collected; freeze expected within minutes.
- 3 — address frozen (blacklisted); block operations, file a report.
The address level is the maximum across chains. It is not a legal opinion.

## REST API

- OpenAPI 3.1: https://usdtbanned.com/openapi.json (usable as ChatGPT GPT Actions, auth: API key in X-API-Key header)
- GET https://usdtbanned.com/api/v1/risk/{address} — risk for one address (key required)
- POST https://usdtbanned.com/api/v1/risk/batch — up to 50 addresses (key required)
- GET https://usdtbanned.com/api/v1/proposals?status=open — open freeze proposals (key required)
- GET https://usdtbanned.com/api/risk/{address} — free check for people, 60 requests per 10 minutes per IP
- GET https://usdtbanned.com/api/stats — public statistics

## Pay with crypto (for AI agents)

- Plans and payment methods: GET https://usdtbanned.com/api/v1/plans (MCP tool get_plans).
- USDT TRC-20: POST https://usdtbanned.com/api/v1/orders {"plan":"api30"} → send the exact amount (unique cents) to the returned Tron address within 60 min → POST https://usdtbanned.com/api/v1/orders/{id}/tx {"tx":"<hash>"} → GET https://usdtbanned.com/api/v1/orders/{id} returns the API key. MCP: create_order → submit_payment → get_order. No account needed for API plans.
- x402 (USDC on Base): coming soon.
- Agents must get the user's explicit approval before sending funds.

## Plans

- LIGHTHOUSE plan (monitoring of up to 10 addresses, API, dashboard, webhooks, MCP personal tools): 5 USDT / 30 days, 25 USDT / 1 year
- Payment in USDT (TRC-20). Address checks are free.

## Links

- Web app: https://usdtbanned.com/
- Check an address: https://usdtbanned.com/?address={address}#/
- Agent guide: https://usdtbanned.com/#/agents