TAC RPC — Free Endpoint & Developer Guide

TAC brings EVM applications to the TON ecosystem via an EVM-compatible layer. This guide shows how to connect to a free TAC RPC endpoint on MoltNode — no API key and no signup required.

What is TAC

TAC is an EVM-compatible network that aims to make Ethereum-style applications accessible within the TON ecosystem. By offering an EVM layer, it lets developers reuse Solidity contracts and familiar Ethereum tooling while reaching users and liquidity associated with TON. In practice, that means the contracts, libraries, and patterns you already know from Ethereum development apply, with the goal of bridging two ecosystems that historically used different execution environments.

Because TAC is EVM-compatible, it speaks the standard eth_* JSON-RPC method set, uses ordinary Ethereum-style addresses, and works with the usual Solidity compilers and wallets. The native token is TAC. As with any newer network, it is worth confirming the current chain ID and network parameters from an authoritative source before configuring production deployments, but day-to-day reads and standard transactions use the same familiar JSON-RPC calls you already rely on.

TAC RPC endpoint on MoltNode

MoltNode gives TAC one clean URL that is also a live RPC endpoint:

https://moltnode.ag/tac

There is no API key to provision and no account to create. The endpoint speaks JSON-RPC 2.0 over HTTP POST, and CORS is open so browser apps can call it directly. The URL is deliberately dual-purpose: open it with a GET request in a browser and you get a human-readable page describing the chain; send a POST with a JSON-RPC body and you get a machine response. One address serves both audiences.

To add it as a custom network in a wallet, point the network's RPC URL at https://moltnode.ag/tac and use TAC as the currency symbol, along with the network's current chain ID.

Probe it with curl

The fastest way to confirm the TAC JSON-RPC endpoint is live is to ask for the latest block number:

curl -s https://moltnode.ag/tac \
  -X POST \
  -H 'Content-Type: application/json' \
  -d '{"jsonrpc":"2.0","id":1,"method":"eth_blockNumber","params":[]}'

You will get back a JSON object with a hex-encoded block height in the result field. Swap in any other eth_* method — eth_chainId, eth_getBalance, eth_call — to read whatever your app needs from the TAC node.

Use it from your app

Any JSON-RPC client works. Here is a minimal example with viem, pointing a custom transport at the free TAC RPC:

import { createPublicClient, http } from "viem";

const client = createPublicClient({
  transport: http("https://moltnode.ag/tac"),
});

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

The same URL drops into ethers, web3.py, wagmi, or any other library that accepts an HTTP RPC URL — no extra configuration beyond the endpoint itself.

Reliability & failover

Behind the single moltnode.ag/tac URL sits managed upstream infrastructure. Requests are routed to healthy providers, and if an upstream is unreachable or returns an error, MoltNode automatically fails over so your client keeps getting answers. The provider API keys live server-side and are never exposed to your client, so you get the benefit of premium upstreams without managing any credentials yourself.

There is no hard rate limit, but the endpoint is a shared, free resource. Please use it responsibly: cache results where you can, avoid tight polling loops, and if you are running heavy production workloads, treat the TAC RPC endpoint as a fast default and a failover rather than a single point of dependence.

For humans and agents

The dual GET/POST behavior makes the endpoint friendly to both people and software. A developer can paste https://moltnode.ag/tac into a browser to read about the chain; a script or wallet POSTs JSON-RPC to the same place.

For automated discovery, MoltNode publishes a machine-readable catalog of every supported chain at https://moltnode.ag/api/chains and an agent-oriented summary at https://moltnode.ag/llms.txt. An AI agent can fetch the catalog, find the TAC entry and its endpoint, and start issuing eth_* calls without any human setup.

Closing

The free TAC RPC endpoint at https://moltnode.ag/tac gives you a no-key, JSON-RPC TAC node that works with viem, ethers, wallets, and AI agents alike — with automatic failover handled for you. Point your client at the URL and start building.