Cosmos Hub RPC Endpoint

Flat-rate Cosmos Hub RPC provider and Cosmos Hub RPC node access: free tier, no KYC, HTTP.

Cosmos Hub is the flagship chain of the Cosmos ecosystem and the original home of the Inter-Blockchain Communication protocol (IBC). Secured by the ATOM token under CometBFT (Tendermint) consensus, it offers ~6-second blocks with instant, single-slot finality.

About Cosmos Hub

Cosmos Hub launched in March 2019. It runs the Gaia application built on the Cosmos SDK, with a bonded proof-of-stake validator set (the top ~180 validators by stake). CometBFT consensus gives deterministic finality — once a block is committed it cannot be reverted, so there is no probabilistic confirmation wait.

The Hub pioneered IBC, the standard that lets sovereign Cosmos chains transfer tokens and messages trustlessly. It also offers Interchain Security (ICS), where the Hub's validator set can secure consumer chains. Developers query the Hub over Tendermint RPC, the Cosmos REST (LCD) API, and gRPC.

Common Use Cases on Cosmos Hub

• IBC transfers and cross-chain routing across the Cosmos ecosystem
• ATOM staking and delegation
• Interchain Security for consumer chains
• Governance over the Cosmos Hub
• Liquid staking and DeFi via connected chains

Cosmos Hub Ecosystem

The Hub connects to hundreds of IBC-enabled chains including Osmosis, Celestia, Injective, dYdX, Neutron, and Stride. Neutron and Stride are among the consumer chains secured via Interchain Security.

Cosmos Hub Mainnet RPC URL (HTTP)

Cosmos Hub WebSocket RPC URL

Not available for Cosmos Hub right now: none of its upstreams currently accepts a subscription in our health checks. Poll the HTTP endpoint above instead.

Cosmos Hub Testnet RPC URL

Same API key, same plan: testnet requests count like any other request.

Quick Start: Connect to Cosmos Hub

cURL

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

Note: Cosmos Hub uses its own RPC methods. Refer to the official Cosmos Hub documentation for available methods.

Bridging to Cosmos Hub

Native IBC handles transfers between Cosmos chains. For Ethereum and other ecosystems, Axelar, Wormhole, and Gravity Bridge route assets in and out of the Cosmos Hub.

Features of SwiftNodes for Cosmos Hub

• 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 support (WebSocket not available for this chain right now)
• One API key works across all 128 supported chains and their testnets, including Cosmos Hub

Rate Limits

Frequently Asked Questions: Cosmos Hub

Cosmos Hub 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.
• Cosmos RPC Explained: Tendermint RPC vs REST vs gRPCOn Ethereum, 'the RPC' is one JSON-RPC endpoint. On Cosmos chains, 'RPC' can mean three different interfaces — Tendermint/CometBFT RPC, REST (LCD), and gRPC — each on its own port, each for a different job. Here's what each one does, when to use it, and the mental shift from calling contracts to querying modules.

Related Cosmos chains

Explore RPC endpoints for other Cosmos networks on SwiftNodes: