# Tronergy


- **Get Started**
- [Introduction](/docs): Let your users send USDT and other TRON tokens without holding TRX.
- [Quickstart](/docs/quickstart): Send your first gasless USDT transfer on testnet in about 5 minutes.
- [Authentication](/docs/authentication): Create an API key and send it with every request.
- [Sandbox](/docs/sandbox): Test on TRON testnet for free, then switch to live.

- **Guides**
- [Send USDT](/docs/guides/send-usdt): Relay a user-signed USDT transfer and pay the network cost yourself.
- [Pay fees in tokens](/docs/guides/pay-fees-in-tokens): Let the user pay you a fee in USDT or TRX as part of the same relay.
- [Rent energy](/docs/guides/rent-energy): Send energy to any TRON address for a set time, and let it broadcast on its own.
- [Swap tokens](/docs/guides/swap): Let users swap tokens on SunSwap with zero TRX.
- [Bring your own transaction](/docs/guides/broadcast): Build the transaction yourself with TronWeb and relay it with Tronergy.
- [Batch relays](/docs/guides/batch): Send many relays of the same mode in one request.
- [Track status](/docs/guides/track-status): Follow a relay until it is done, by polling or with a live stream.
- [Node proxy](/docs/guides/node-proxy): Point TronWeb at a Tronergy node URL and your broadcasts become gasless. Early access.
- [Billing](/docs/guides/billing): Fund your balance, see what each relay costs, and watch your spend.
- [Errors and retries](/docs/guides/errors): Handle common errors and retry safely without sending a payment twice.

- **API Reference**
- [API overview](/docs/api/overview): Base URL, authentication, request and response format, pagination, idempotency and rate limits.
- [Estimate](/docs/api/estimate): Quote what a relay will cost before you submit it.
- [Pricing](/docs/api/pricing): Current energy price and hourly price history, public and without an API key.
- [Construct transaction](/docs/api/construct): Build the unsigned TRON transactions your user signs, with no node or ABI encoding on your side.
- [Execute](/docs/api/execute): Submit a relay. Tronergy supplies the energy and bandwidth and broadcasts your signed transaction.
- [Operations](/docs/api/operations): Get, list, count and cancel your relay operations.
- [Batches](/docs/api/batches): Submit many relays of one mode in a single request, read their progress and retry failed items.
- [Status stream](/docs/api/stream): Follow one relay operation live with Server-Sent Events.
- [Balance](/docs/api/balance): Read your prepaid balance, history and usage, get a deposit address, set alerts and withdraw.
- [API keys](/docs/api/api-keys): List, create and revoke API keys.
- [Node proxy](/docs/api/node-proxy): Manage node proxy settings, broadcast history and node links.
- [Errors](/docs/api/errors): The error format and every error code the API returns, with what to do.