> ## Documentation Index
> Fetch the complete documentation index at: https://docs.chainstack.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Chainstack updates: July 27, 2026

> Chainstack now supports Arc — Circle's USDC-native, EVM-compatible L1 — on Global Nodes and Dedicated Nodes for testnet, and the MCP server faucet adds Robinhood Chain testnet.

**Protocols**. Chainstack now supports Arc — Circle's USDC-native, EVM-compatible L1 for stablecoin payments. You can deploy [Global Nodes](/docs/global-elastic-node) and [Dedicated Nodes](/docs/dedicated-node) for Arc testnet, in Full and Archive modes with debug and trace.

**MCP Server**. The [Chainstack MCP server](https://mcp.chainstack.com) testnet faucet (`request_testnet_funds`) now supports **Robinhood Chain testnet** — request funds with `network="robinhood"` (it tops up to 1 ETH), and common aliases like `robinhood-chain` and `robinhood-testnet` resolve automatically. Scroll Sepolia has been retired from the faucet, so `scroll-sepolia-testnet` is no longer available. The supported testnet count is unchanged at 12.