Quicknode supports the following Sei APIs on all endpoints. Using your Sei endpoint, you can call any of the methods available in these APIs. For a complete list of supported RPC methods, refer to the documentation for each API.

Deprecation Notice

Cosmos SDK and CosmWasm functionality will be deprecated in favor of EVM-only. For more details, see SIP-3 and the governance proposal.

Supported APIs

Ethereum JSON-RPC API

Core Ethereum protocol methods for blockchain interaction, account management, and transaction processing

Debug API

Development and debugging utilities for deep blockchain analysis and transaction inspection

Tendermint JSON-RPC API (Deprecated)

Consensus engine endpoints for querying blocks, transactions, validators, and broadcasting transactions within the Tendermint consensus layer

Cosmos gRPC (Deprecated)

High-performance interface for interacting with Cosmos SDK modules, enabling queries and transaction broadcasts across staking, governance, distribution, and more

Cosmos REST API (Deprecated)

HTTP-based interface for querying Cosmos SDK chain data, module states, account information, and submitting transactions

CosmWasm REST API (Deprecated)

Smart contract interaction methods for querying and executing CosmWasm contracts on Cosmos SDK chains

Archive Data Availability

Quicknode's Sei Pacific endpoints provide full archive data access starting from block height 1 (genesis).

For blocks >= 78309999: Use the x-cosmos-block-height header with REST API requests or specify the height parameter with Tendermint API requests:

Cosmos REST API Example:

curl --location 'https://docs-demo.sei-pacific.quiknode.pro/cosmos/distribution/v1beta1/delegators/sei1xyp8xxely9txewfe7nes2nxrzr0qyrfghrj5cs/rewards' \
--header 'x-cosmos-block-height: 78309999'

Tendermint API Example:

curl --location 'https://docs-demo.sei-pacific.quiknode.pro/block?height=78309999'

For Sei EVM methods: No special headers are required. The earliest block number for EVM methods is 79123881 (Sei V2 upgrade block).

Supported Networks

Quicknode provides access to the following Sei networks:

Mainnet

Type:Production

Chain ID:

1329

HTTP:

WSS:

Archive:Yes

Pruning:None

Testnet

Type:Testnet

Chain ID:

1328

HTTP:

WSS:

Archive:No

Pruning:3240000 blocks

Network

Type

Chain ID

HTTP

WSS

Archive

Pruning

Mainnet

Production

1329

Yes

None

Testnet

Testnet

1328

No

3240000 blocks

Supported Products

The following Quicknode products are supported on the Sei blockchain:

Streams

Real-time and historical blockchain data ingestion with exactly-once delivery guarantees and custom filtering.

Webhooks

HTTP endpoint notifications for blockchain events with payload customization and retry mechanisms.