TAC RPC Endpoint

Flat-rate TAC RPC provider and TAC RPC node access: free tier, no KYC, HTTP & WebSocket. TAC mainnet chain ID 239.

TAC is a Layer 1 that lets Ethereum applications reach TON and Telegram users. It is built on Cosmos SDK with CosmosEVM, connects to TON through a dedicated TON Adapter, and uses the TAC token for gas, staking and governance.

About TAC

TAC mainnet launched in July 2025 alongside the TAC token, with validators including P2P, Chorus One and Kiln and a planned Babylon Bitcoin-staking integration. The TON Adapter uses a distributed sequencer with lock-and-mint transfers, not liquidity pools, to move assets between TON and TAC.

The EVM is compatible with the Cancun fork, so Solidity contracts deploy unchanged and standard Ethereum JSON-RPC applies. TAC's model is hybrid dApps: contracts run on TAC while users sign from TON wallets inside Telegram. Fees paid in TON are converted into TAC by the protocol, so TAC is the only gas token on the EVM side.

Common Use Cases on TAC

• Deploying Ethereum DeFi to Telegram users
• Hybrid dApps called from TON wallets
• Lending and DEX liquidity for TON assets
• Cross-chain transfers between TON and EVM

TAC Mainnet RPC URL (HTTP)

TAC WebSocket RPC URL

Quick Start: Connect to TAC

cURL

curl -X POST https://rpc.swiftnodes.io/rpc/tac?key=YOUR_API_KEY \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","method":"eth_blockNumber","params":[],"id":1}'

ethers.js

import { JsonRpcProvider } from "ethers";

const provider = new JsonRpcProvider(
  "https://rpc.swiftnodes.io/rpc/tac?key=YOUR_API_KEY"
);

const blockNumber = await provider.getBlockNumber();
console.log("TAC block:", blockNumber);

viem

import { createPublicClient, http } from "viem";

const client = createPublicClient({
  transport: http("https://rpc.swiftnodes.io/rpc/tac?key=YOUR_API_KEY"),
});

const blockNumber = await client.getBlockNumber();

web3.py

from web3 import Web3

w3 = Web3(Web3.HTTPProvider("https://rpc.swiftnodes.io/rpc/tac?key=YOUR_API_KEY"))
print("TAC block:", w3.eth.block_number)

Add TAC to MetaMask

Features of SwiftNodes for TAC

• Load-balanced across multiple upstream nodes wherever a chain has more than one, with automatic failover
• Health-checked every 2 minutes with automatic failover
• Free tier available — no credit card or KYC required
• Flat-rate monthly pricing with no per-request fees
• HTTP and WebSocket support
• One API key works across all 75+ supported chains, including TAC

Rate Limits

Frequently Asked Questions: TAC

TAC guides from the blog

• Which Chains Stopped? 43 Days of Block Timestamps Across 110 ChainsBetween August 25 and October 6, 2026, ten of 110 chains we scanned stopped producing blocks for 10 minutes or more. TAC was down 10.6 days, Neutron 77.75 hours, Cosmos Hub 24.8 hours, Cronos 17 hours. The full list, the method, and the raw data.

Related EVM chains

Explore RPC endpoints for other EVM networks on SwiftNodes: