Blockchain Data Indexing Service

High-performance blockchain data indexing API

ChainPulse delivers balance change alerts, contract event webhooks, and historical queries. Sub-100ms delivery with reorg handling so you can trust on-chain data.

Live networks

4 mainnets

Ethereum · BSC · Base · Arbitrum

Data latency

<100ms

Millisecond delivery

Uptime

99.9%

Enterprise-grade stability

Daily requests

10M+

Serving developers worldwide

Core capabilities

Powerful, reliable blockchain indexing built for developers

Balance change webhooks

Track native coins and ERC20/BEP20 token balance changes in real time

Contract event webhooks

Subscribe to contract events such as Transfer, Swap, and Mint and push them to your backend

Millisecond delivery

Push latency under 100ms so you react to on-chain state immediately

Reorg handling

Detect chain reorganizations and roll back affected data for eventual consistency

Historical queries

Query balances, transactions, and contract events through standard REST APIs

Enterprise reliability

99.9% uptime with redundant nodes for production workloads

Data reliability

Real-time push + reorg safety

Balance and contract event delivery with robust reorg handling so your data matches finalized chain state.

Coin/token balance change webhooks
Smart contract event delivery
Automatic reorg detection and rollback
Historical data APIs
RESTful API + Webhook modes
Balance webhooks
Monitor native and token balances and push changes to your service instantly.
Contract events
Subscribe to contract events like Transfer, Approval, and Swap for your apps.
Reorg handling
Detect reorgs, notify affected records, and roll back to stay aligned with the chain.
Terminal
$ curl -X GET https://api.chainpulse.io/v1/blocks/latest \
-H "Authorization: Bearer YOUR_API_KEY"
{
  "status": "success",
  "data": {
    "block_number": 38456789,
    "block_hash": "0x1a2b3c...",
    "timestamp": 1715789456,
    "transactions_count": 156,
    "is_finalized": true
  }
}
Easy to integrate

Start with a few lines of code

RESTful APIs and clear docs help you integrate in minutes.

Supported blockchains

Ethereum, BSC, Base, and Arbitrum mainnets are live; Solana is coming soon.

EthereumBSCBaseArbitrumSolana (coming soon)

Get started today ChainPulse

Join developers building on reliable chain data. The free tier includes 1,000 requests per day for testing.

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1000
Daily requests
5 min
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