What is the TON chain ID?

TON has no EVM chain ID. The network is identified by its global ID, -239 on mainnet (-3 on testnet), stored in config param 19; the CAIP-2 ID is tvm:-239. Addresses also carry a workchain: 0 for the basechain, -1 for the masterchain.

What is the TON RPC URL?

On Triport: https://triport.io/rpc/ton with your API key in the x-token header, or https://triport.io/r/ /ton where a header is impossible (wallets, config files).

Can I add TON to MetaMask with wallet_addEthereumChain?

No. wallet_addEthereumChain registers EVM networks by chain ID, and TON is not an EVM network. Use a TON wallet or SDK and point it at the RPC URL above.

Is my API key sent to Triport when I use this page?

No. Snippets are generated in your browser: the key is never submitted, never stored and never written into the page URL, which is why this page has no shareable link.

TON chain ID, RPC URL and network config

Last updated: September 23, 2026

TON network identifiers

TON mainnet identifiers
Identifier	Value	Source
Chain ID	`None` TON is not an EVM network; it is identified by its global ID.	TON docs: config param 19 (global ID)
Global ID (network ID)	`-239` Config param 19. Testnet uses -3.	TON docs: how to interact with wallets · TON docs: config param 19 (global ID)
Workchains	`0 (basechain), -1 (masterchain)` Wallets and contracts live on the basechain.	TON docs: how to interact with wallets
CAIP-2 ID	`tvm:-239` The chain identifier multichain wallets and WalletConnect use.	CAIP-2 tvm namespace

Tools that expect an EVM chain ID do not apply to TON; multichain wallets use the CAIP-2 ID tvm:-239 instead.

TON RPC URLs

TON mainnet RPC endpoints
Triport RPC URL (header auth)	`https://triport.io/rpc/ton`
Triport RPC URL (keyed)	`https://triport.io/r/<API_KEY>/ton`
Required scope	`ton:rpc`
Network-run public RPC	TON's documentation points to the TON Center API, which allows 1 request per second without an API key. TON docs: TON Center rate limits

Public-endpoint limits are as each operator publishes them, checked 23 September 2026.

Plans and per-category rate limits: pricing. Network overview: TON RPC; method reference: TON documentation.

Verify you are on TON mainnet

Call getConfigParam first. It must return a cell holding 0xFFFFFF11, which is -239 as a signed 32-bit integer — any other value means the endpoint serves a different network.

curl https://triport.io/rpc/ton \
  -H "x-token: <API_KEY>" \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","id":1,"method":"getConfigParam","params":{"config_id":19}}'

Sources: the chain's own documentation and the CAIP-2 namespace specs cited in the tables above; EVM chain IDs come from Triport's chain registry and match them.

FAQ

What is the TON chain ID?: TON has no EVM chain ID. The network is identified by its global ID, -239 on mainnet (-3 on testnet), stored in config param 19; the CAIP-2 ID is tvm:-239. Addresses also carry a workchain: 0 for the basechain, -1 for the masterchain.
What is the TON RPC URL?: On Triport: https://triport.io/rpc/ton with your API key in the x-token header, or https://triport.io/r/<API_KEY>/ton where a header is impossible (wallets, config files).
Can I add TON to MetaMask with wallet_addEthereumChain?: No. wallet_addEthereumChain registers EVM networks by chain ID, and TON is not an EVM network. Use a TON wallet or SDK and point it at the RPC URL above.
Is my API key sent to Triport when I use this page?: No. Snippets are generated in your browser: the key is never submitted, never stored and never written into the page URL, which is why this page has no shareable link.