Mudassir Khan

Cosmos SDK chain

Cosmos Hub — RPC URL, Chain ID, and Wallet Setup

Cosmos Hub mainnet uses the string chain id cosmoshub-4 (not EIP 155) and native currency ATOM. The community maintained Tendermint RPC URL is https://cosmos-rpc.publicnode.com, documentation lives at hub.cosmos.network, and the block explorer is mintscan.io/cosmos.

Chain ID cosmoshub-4Native ATOMMainnetVerified 2026-05-15

Quick reference

Copy paste ready values. Verified on 2026-05-15.

Chain name
Cosmos Hub
Chain ID
cosmoshub-4
Network type
Mainnet
Native currency
Cosmos (ATOM) — 6 decimals
Recommended public RPC
https://cosmos-rpc.publicnode.com
Block explorer
https://www.mintscan.io/cosmos
Official docs
https://hub.cosmos.network/
Last verified
2026-05-15

Wallet setup

Cosmos Hub is a Cosmos SDK chain and does not use EIP 3085. Install a Cosmos native wallet such as Keplr, Leap, or Cosmostation. Most of these wallets ship with this chain preconfigured; otherwise use the chain registry suggestion flow.

KeplrLeapCosmostation

Free / public RPC URLs

Public RPC URLs for Cosmos Hub

These endpoints are free, anonymous, and rate limited. They are useful for development, wallet reads, and one off scripts. For production traffic or indexer workloads, pair them with a paid provider so the public list becomes your fallback rather than your primary.

RPC URLHosted byNotes
https://cosmos-rpc.publicnode.comAllnodes (publicnode)Recommended in official docs.
https://rpc.cosmos.directory/cosmoshubChain Registry / cosmos.directory
https://rpc-cosmoshub.blockapsis.comChainapsis

Paid RPC providers

Production dapps, indexers, and trading systems should use a managed provider with a private API key, archive history, and an SLA. These providers list Cosmos Hub support on their public pricing pages.

  • Ankr

    Public RPC for 80+ chains plus a Premium tier.

    Free tier: Free public endpoints (rate limited) for 80+ chains, no signup required.

Compare every paid RPC provider →

Block explorers and docs

Cosmos Hub explorers and documentation

When the answer is real

Caveats and things to verify

  • Cosmos chains do not use EIP 3085 (MetaMask add network). Use Keplr, Leap, Cosmostation, or another Cosmos native wallet.
  • There are multiple endpoint types: Tendermint RPC (port 26657), gRPC (port 9090), and REST (port 1317). dApps usually need REST or RPC.

FAQ

Frequently asked questions

What is the Cosmos Hub chain ID?

The Cosmos Hub mainnet chain id is the string cosmoshub-4. Unlike EVM networks, Cosmos SDK chains use string chain ids, not numeric EIP 155 ids. The previous mainnet was cosmoshub-3.

How do I add Cosmos Hub to Keplr?

Keplr ships with Cosmos Hub preconfigured. If you removed it or you are using a custom build, use the chain registry suggestion at chains.keplr.app or call window.keplr.experimentalSuggestChain with the cosmoshub-4 chain registry entry.

Sources

Other chains in the directory

  • Ethereum

    Chain ID 1 · Native ETH

    The original smart contract platform. Chain ID 1, native ETH.

  • Arbitrum One

    Chain ID 42161 · Native ETH

    Largest Ethereum optimistic rollup. Chain ID 42161, native ETH.

  • OP Mainnet

    Chain ID 10 · Native ETH

    OP Stack flagship rollup. Chain ID 10, native ETH.

  • Base

    Chain ID 8453 · Native ETH

    Coinbase's OP Stack L2. Chain ID 8453, native ETH.

  • Polygon PoS

    Chain ID 137 · Native POL

    Ethereum sidechain with low fees. Chain ID 137, native POL.

  • BNB Smart Chain

    Chain ID 56 · Native BNB

    EVM compatible chain backed by BNB Chain. Chain ID 56, native BNB.

Page maintained by Mudassir Khan · Last verified 2026-05-15.