> For the complete documentation index, see [llms.txt](https://docs.tronsave.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.tronsave.io/developers.md).

# Developers

- [Developer Quickstart](https://docs.tronsave.io/developers/quickstart.md): Make your first TronSave API call — get a key, estimate, buy, and confirm an Energy order in about 10 minutes.
- [Authentication](https://docs.tronsave.io/developers/authentication.md): How TronSave authenticates API requests — Internal Account, API Key, and Signed Transaction.
- [Environments & Networks](https://docs.tronsave.io/developers/environments.md): TronSave's two API environments — Mainnet and the Nile testnet — and how to switch between them.
- [Errors & Rate Limits](https://docs.tronsave.io/developers/errors-and-rate-limits.md): Rate limits, HTTP status codes, and error payloads returned by the TronSave API.
- [API Reference](https://docs.tronsave.io/developers/api-reference.md): The TronSave REST API — base URLs, authentication, versioning, the response envelope, and links to every endpoint group.
- [Buy Resources](https://docs.tronsave.io/developers/api-reference/buy-resources.md): Two ways to buy Energy and Bandwidth through the TronSave API — Signed Transaction or API Key — and how to choose between them.
- [Signed Transaction](https://docs.tronsave.io/developers/api-reference/buy-resources/signed-tx.md): Buy Energy or Bandwidth by submitting a signed TRON transaction — estimate cost, get a signed transaction, then create the order.
- [Estimate TRX](https://docs.tronsave.io/developers/api-reference/buy-resources/signed-tx/estimate-trx.md): Estimate the TRX required to buy Energy or Bandwidth for a given amount and rental duration before creating a signed-transaction order.
- [Get Signed Transaction](https://docs.tronsave.io/developers/api-reference/buy-resources/signed-tx/get-signed-transaction.md): Generate a signed TRX payment transaction for a resource order — either with your own code or via the TronSave Get Signed Transaction API.
- [Create Order](https://docs.tronsave.io/developers/api-reference/buy-resources/signed-tx/create-order.md): Submit a signed TRON transaction to create a resource order — Step 3 of the signed-transaction buy flow.
- [API Key](https://docs.tronsave.io/developers/api-reference/buy-resources/api-key.md): Buy Energy or Bandwidth with a TronSave API key and a prefunded internal account — no per-order on-chain signing required.
- [Get Account Info](https://docs.tronsave.io/developers/api-reference/buy-resources/api-key/get-account-info.md): Retrieve the internal account information associated with your TronSave API key, including balance and deposit address.
- [Get Order Book](https://docs.tronsave.io/developers/api-reference/buy-resources/api-key/get-order-book.md): Retrieve the current Energy or Bandwidth order book with available offers and prices, authenticated with a TronSave API key.
- [Estimate TRX](https://docs.tronsave.io/developers/api-reference/buy-resources/api-key/estimate-trx.md): Estimate the TRX required to buy a given amount of Energy or Bandwidth for a chosen rental duration, using your TronSave API key.
- [Create Order](https://docs.tronsave.io/developers/api-reference/buy-resources/api-key/create-order.md): Create an Energy or Bandwidth purchase order with an API key, paid from your TronSave internal account, and receive an orderId to track its status.
- [Get Order Details](https://docs.tronsave.io/developers/api-reference/buy-resources/api-key/get-order-details.md): Retrieve detailed information and the current status of a specific order using its orderId.
- [Order History](https://docs.tronsave.io/developers/api-reference/buy-resources/api-key/order-history.md): Retrieve the order history of the internal account associated with your TronSave API key, with pagination and status filtering.
- [List Orders](https://docs.tronsave.io/developers/api-reference/buy-resources/api-key/list-orders.md): Retrieve a detailed, paginated list of orders created by a whitelisted buyer account, authenticated with a TronSave API key.
- [Monthly Stats](https://docs.tronsave.io/developers/api-reference/buy-resources/api-key/monthly-stats.md): Retrieve a buyer account's monthly trading statistics for the last 6 months. Requires a whitelisted API key.
- [Extend Orders](https://docs.tronsave.io/developers/api-reference/extend-orders.md): Extend an existing TronSave order (v2) in two steps — fetch extendable delegates, then submit an extend request paid by API key or signed transaction.
- [Get Extendable Delegates](https://docs.tronsave.io/developers/api-reference/extend-orders/get-extendable-delegates.md): Query an order to find which delegates are eligible for extension, how much TRX it will cost, and the extendData payload you pass to the extend request in step 2.
- [Extend Request](https://docs.tronsave.io/developers/api-reference/extend-orders/extend-request.md): Submit an extend request for an existing TronSave order — pay with your API key (internal account) or with a signed transaction — and receive an orderId.
- [Sell Resources](https://docs.tronsave.io/developers/api-reference/sell-resources.md): Manually sell Energy or Bandwidth on TronSave by matching active buy orders with a signed on-chain delegate transaction.
- [Fast Charge](https://docs.tronsave.io/developers/api-reference/fast-charge.md): Buy Energy for many addresses in one flow — estimate cost, create orders, track matching, then confirm to reclaim unused Energy and refund the difference.
- [Estimate TRX](https://docs.tronsave.io/developers/api-reference/fast-charge/estimate-trx.md): Estimate the TRX required to create fast charge orders before placing them, using your API key and prefunded internal account.
- [Create Order](https://docs.tronsave.io/developers/api-reference/fast-charge/create-order.md): Create one or more Fast Charge orders to rent Energy for a list of receiver addresses in a single request, authenticated with your TronSave API key.
- [Track Order](https://docs.tronsave.io/developers/api-reference/fast-charge/track-order.md): Check the matching status of one or more Fast Charge orders by their order IDs.
- [Confirm Request](https://docs.tronsave.io/developers/api-reference/fast-charge/confirm-request.md): Confirm completed fast charge orders to end the Energy rental, reclaim unused Energy, and trigger the TRX refund to your internal account.
- [Cancel Order](https://docs.tronsave.io/developers/api-reference/fast-charge/cancel-order.md): Cancel one or more pending fast charge orders that have not yet been matched, using your API key.
- [Get History](https://docs.tronsave.io/developers/api-reference/fast-charge/get-history.md): Retrieve your Fast Charge order history, sorted by creation time with optional time-range and pagination filters.
- [MCP Server](https://docs.tronsave.io/developers/api-reference/mcp.md): The TronSave MCP server — drive TronSave authentication, orders, pricing, and delegate workflows from AI agents over Streamable HTTP.
- [SDK](https://docs.tronsave.io/developers/sdk.md): Official TronSave SDKs for buying and managing Energy and Bandwidth on TRON — available for TypeScript, Rust, Python, Java, and PHP.
- [Code Examples](https://docs.tronsave.io/developers/code-examples.md): End-to-end, copy-paste code examples for buying and extending Energy and Bandwidth through the TronSave API.
- [v2 — Buy with Private Key](https://docs.tronsave.io/developers/code-examples/buy-with-private-key.md): Full working example of buying Energy or Bandwidth via the TronSave v2 API by signing the payment transaction with a wallet private key.
- [v2 — Buy with API Key](https://docs.tronsave.io/developers/code-examples/buy-with-api-key.md): A complete, runnable example that buys Energy or Bandwidth with an API key and polls the order until it is fulfilled, in JavaScript, Python, and PHP.
- [v2 — Extend with Private Key](https://docs.tronsave.io/developers/code-examples/extend-with-private-key.md): A complete working example that extends an existing resource delegation by paying for it with a locally signed transaction built from your private key.
- [v2 — Extend with API Key](https://docs.tronsave.io/developers/code-examples/extend-with-api-key.md): Full working example showing how to extend an existing TronSave order using an API Key, in JavaScript, PHP, and Python.
- [v0 — Buy with Private Key](https://docs.tronsave.io/developers/code-examples/buy-with-private-key-1.md): Full working example for buying Energy via the TronSave v0 API by signing a TRX transaction with your own private key.
- [v0 — Buy with API Key](https://docs.tronsave.io/developers/code-examples/buy-with-api-key-1.md): Full v0 example — buy Energy with an API Key, from order book check to fulfillment polling, in JavaScript, Java, Ruby, and PHP.
- [v0 — Extend with API Key](https://docs.tronsave.io/developers/code-examples/extend-with-api-key-1.md): Full v0 example showing how to extend a resource order using an API Key.
- [Legacy API (v0)](https://docs.tronsave.io/developers/legacy-api-v0.md): The legacy TronSave REST API v0 — kept for existing integrations. New projects should use v2.
- [Buy — Signed Transaction](https://docs.tronsave.io/developers/legacy-api-v0/signed-tx.md): Legacy v0 flow for buying Energy with a signed TRON transaction — estimate TRX, generate a signed transfer, and create the order.
- [Buy — API Key](https://docs.tronsave.io/developers/legacy-api-v0/api-key.md): Legacy v0 REST endpoints for buying Energy with an API key — account info, order book, TRX estimate, create order, order details, order history, and wallet activation.
- [Extend](https://docs.tronsave.io/developers/legacy-api-v0/extend.md): Legacy v0 flow for extending TronSave resource delegations with an API Key — check extendable delegates, then create extend requests.
- [Changelog](https://docs.tronsave.io/developers/changelog.md): Version history for the TronSave energy rental API — the current v2 generation, legacy v0 support status, and notable changes for integrations.