The Open Network (TON)

GetBlock provides fast and reliable access to TON RPC nodes via JSON-RPC API. Connect to the TON network without running your own infrastructure.

The Open Network (TON) is a high-performance, decentralized Layer 1 blockchain originally designed by Telegram developers Nikolai and Pavel Durov and now maintained by the independent TON Foundation and community. Built around a sharded multi-blockchain architecture and Byzantine Fault Tolerant Proof-of-Stake consensus, TON is designed to scale horizontally through dynamic sharding while maintaining ~5-second block times on its masterchain. The network is natively integrated with Telegram’s 800M+ user base and powers payments, DeFi, NFTs, and decentralized services such as TON DNS, TON Sites, and TON Storage.

Key Features

• Dynamic Sharding: Masterchain coordinates a configurable set of workchains, each of which can split into shardchains as load increases — enabling horizontal scalability

• High Throughput: Architecture designed for parallel transaction processing across shards, with documented benchmarks above 100,000 TPS

• Fast Finality: ~5 second masterchain block times with deterministic finality

• BFT Proof-of-Stake: Validators are elected from stakers and rotate every election cycle

• TON Virtual Machine (TVM): Stack-based VM that runs smart contracts compiled from FunC, Tact, or Tolk — not EVM-compatible

• Native Token Standards: Jettons (TIP-3 fungible tokens) and NFTs (TIP-4 non-fungible tokens)

• Toncoin (TON): Native gas and staking token, 9 decimals (1 TON = 1,000,000,000 nanotons)

• Telegram Integration: First-class integration with the Telegram Mini Apps platform and TON Connect wallet protocol

• Low Fees: Sub-cent transaction fees for typical wallet and contract operations

• Decentralized Services: TON DNS, TON Sites, TON Storage, and TON Proxy for fully on-chain web infrastructure

TECHNICAL DISCLAIMER: AUTHORITATIVE TON HTTP API SPECIFICATION

GetBlock’s TON API reference documentation is provided exclusively for informational purposes and to optimize the developer experience. The canonical and normative specification for the TON HTTP API (v2) is maintained by TON Foundation and published at toncenter.com/api/v2/ with the upstream source at github.com/toncenter/ton-http-api. For underlying protocol details, consult the official TON documentation at docs.ton.org.

Network Information

Property	Value
Network Name	TON Mainnet
Native Currency	Toncoin (TON)
Decimals	9 (1 TON = 1,000,000,000 nanotons)
Block Time	~5 seconds (masterchain)
Consensus	Byzantine Fault Tolerant Proof-of-Stake
Architecture	Sharded — masterchain (workchain -1) + workchains
Smart Contract VM	TVM (TON Virtual Machine)
EVM Compatible	No
Address Format	User-friendly (EQ… / UQ…) or raw (workchain:hex)

Base URL

Frankfurt, Germany

https://go.getblock.io/<ACCESS-TOKEN>/

The TON HTTP API exposes every method on two parallel transports behind your endpoint:

• REST (GET): GET https://go.getblock.io/<ACCESS-TOKEN>/<method>?<query-params>

• JSON-RPC (POST): POST https://go.getblock.io/<ACCESS-TOKEN>/jsonRPC with a standard JSON-RPC 2.0 body

A handful of state-mutating methods (sendBoc, sendBocReturnHash, runGetMethod, runGetMethodStd, estimateFee) are POST-only.

Supported Networks

Network	JSON-RPC	REST (HTTP API (v4) )	JSON-RPC (v3)	Frankfurt, Germany
Mainnet	✅	✅	✅	✅

Quickstart

In this section, you will learn how to make your first call with either:

• Axios (JavaScript / Node.js)

• Python (Requests library)

Before you begin, you must have already installed npm or yarn on your local machine (for the Axios example) or Python and pip (for the Python example).

JavaScript (Axios)

1

Setup project

Create and initialize a new project:

mkdir ton-api-quickstart
cd ton-api-quickstart
npm init --yes

2

Install Axios

npm install axios

3

Create file

Create a new file named index.js. This is where you will make your first call.

4

Set ES module type

Set the ES module "type": "module" in your package.json.

5

Add code

Add the following code to index.js:

index.js

import axios from 'axios';
const config = {
    method: 'post',
    url: 'https://go.getblock.io/<ACCESS-TOKEN>/getMasterchainInfo',
    headers: {
        'Content-Type': 'application/json'
    },
    data: data
};

axios(config)
    .then(response => console.log(JSON.stringify(response.data, null, 2)))
    .catch(error => console.log(error));

Replace <ACCESS-TOKEN> with your actual access token from GetBlock.

6

Run the script

node index.js

Expected output (example):

{
    "ok": true,
    "result": {
        "@type": "blocks.masterchainInfo",
        "last": {
            "@type": "ton.blockIdExt",
            "workchain": -1,
            "shard": "-9223372036854775808",
            "seqno": 66745702,
            "root_hash": "xO7AlBfHBD18HQxua03QQKb1BMZIOJjPtVVj7rRyxPk=",
            "file_hash": "nzRCfV2w6GKyA6DW61muIVTdLkbkSwozhYDWERj1hmw="
        },
        "state_root_hash": "p58IFlKiohPOi/aiqSW9M8o2AXcc6ZUwANhJlEE5cVw=",
        "init": {
            "@type": "ton.blockIdExt",
            "workchain": -1,
            "shard": "0",
            "seqno": 0,
            "root_hash": "F6OpKZKqvqeFp6CQmFomXNMfMj2EnaUSOXN+Mh+wVWk=",
            "file_hash": "XplPz01CXAps5qeSWUtxcyBfdAo5zVb1N979KLSKD24="
        },
        "@extra": "1778774352.215111:0:0.6613766254069332"
    }
}

Python (Requests)

Available API Methods

GetBlock provides access to the full TON HTTP API v2 surface — every method is available both as a REST GET and as a JSON-RPC POST to /jsonRPC, except for the POST-only methods marked below.

Account Methods

Method	Description
getAddressInformation	Get basic information about an address
getExtendedAddressInformation	Get extended information about an address
getWalletInformation	Get wallet-specific information about an address
getAddressBalance	Get address balance in nanotons
getAddressState	Get address state (active, uninitialized, or frozen)
getShardAccountCell	Get the raw TVM cell representing the shard account
getTokenData	Get Jetton or NFT metadata from a token smart contract

Block Methods

Method	Description
getMasterchainInfo	Get up-to-date masterchain state
getMasterchainBlockSignatures	Get validator signatures for a masterchain block
getShardBlockProof	Get the Merkle proof of a shardchain block
getConsensusBlock	Get the block confirmed by consensus
lookupBlock	Look up a block by seqno, shard, and workchain
getShards	Get shards info by masterchain block seqno
getBlockHeader	Get block header information
getOutMsgQueueSize	Get the size of the outbound message queue

Transaction Methods

Method	Description
getTransactions	Get transactions for a specified address
getTransactionsStd	Standardized version of getTransactions
getBlockTransactions	Get transactions in a specified block
getBlockTransactionsExt	Get transactions in a block with extended information
tryLocateTx	Locate the outgoing transaction at the destination by inbound message
tryLocateResultTx	Same as tryLocateTx — locate the outgoing transaction
tryLocateSourceTx	Locate the source transaction by destination transaction parameters

Configuration Methods

Method	Description
getConfigParam	Get a single blockchain configuration parameter
getConfigAll	Get all blockchain configuration parameters
getLibraries	Get library code by their hashes

Run-Method (POST only)

Method	Description
runGetMethod	Run a get-method of a smart contract
runGetMethodStd	Standardized version of runGetMethod

Send Methods (POST only)

Method	Description
sendBoc	Send a Bag of Cells (signed message) to the chain
sendBocReturnHash	Send a BoC and return its hash for tracking
estimateFee	Estimate fees for a given message

Utility Methods

Method	Description
detectAddress	Get all possible forms of a TON address
detectHash	Get all possible forms of a 256-bit hash
packAddress	Pack an address into base64 form
unpackAddress	Unpack an address from base64 form

JSON-RPC Endpoint

Method	Description
jsonRPC	Generic JSON-RPC 2.0 entrypoint — all of the methods above are callable here

Support

For technical support and questions:

• Support Email: [e-mail]

See Also

• Official TON Documentation

• TON HTTP API v2 Reference

• TON HTTP API GitHub

• Tonviewer Block Explorer

• TONScan Block Explorer

• TON Foundation

• @ton/ton (Official JavaScript SDK)

• pytoniq (Python SDK)

• TON Connect Protocol