Real-time blockchain events & webhooks # Stream on-chain events to your backend in real time EventStream captures blockchain activity as it happens and delivers it to your backend via reliable, zero-loss webhooks and subscriptions. Power alerts, payments, analytics and monitoring with low-latency, multi-chain event feeds. [Start with EventStream](https://auth.crypto-chief.com/registration) #### EventStream Real-time blockchain events delivered directly to your backend. Subscribe to transfers, contract events, blocks and more — across multiple networks — with guaranteed, ordered, zero-loss delivery. Ideal for mission-critical Web3 apps that cannot afford to miss a single on-chain event. #### Webhook Delivery Receive blockchain events as signed HTTP webhooks with automatic retries, backoff and idempotency. Integrate with any backend stack without managing sockets or queues yourself. #### Real-time Subscriptions Create fine-grained subscriptions by address, topic, method signature or contract. Stream only the events you need and keep noise and infrastructure costs under control. #### Monitoring & Alerts Trigger instant alerts on critical events — large transfers, protocol actions, wallet activity or risk signals. Keep your operations, users and compliance tools in sync with the chain in real time. #### Replay & Recovery Safely replay missed events for a chosen block range or time window. Recover from incidents without gaps in your data and keep downstream systems fully consistent. ## Supported Networks & events EventStream works across 70+ networks, covering transfers, contract logs, token events and block activity from a single integration. Track payments, DeFi positions and protocol events in real time on Ethereum, BNB Chain, Solana, Tron, TON, Bitcoin and many more. ![Solana](/img/protocols/solana.svg) Solana SOL High-speed blockchain for scalable DeFi and ultra-low-fee Web3 apps. ![Ethereum](/img/protocols/eth.svg) Ethereum ETH The leading smart-contract blockchain powering DeFi and NFTs. ![Tron](/img/protocols/tron.svg) Tron Tron Fast blockchain for global payments, DeFi, and stablecoin transfers. ![BTC](/img/protocols/btc.svg) Bitcoin BTC The original decentralized blockchain for secure peer-to-peer payments. ![TON](/img/protocols/ton.svg) TON TON Telegram-native blockchain built for mass adoption and lightning speed. ![BSC](/img/protocols/bsc.svg) BNB Smart Chain BNB Low-fee EVM blockchain for smart contracts and a thriving DeFi ecosystem. [View all protocols](/rpc/) [Get your API key ](https://auth.crypto-chief.com/registration) ## Built for every real-time Web3 use case EventStream powers live notifications, payment confirmations, DeFi monitoring and risk analytics with reliable, real-time blockchain events. ##### Wallet notifications Send instant alerts for deposits, withdrawals and balance changes. Improve UX with real-time updates instead of manual refreshes and polling. ##### Payments & commerce Confirm on-chain payments the moment they land in your wallet. Automate order fulfillment, invoicing and settlement with event-driven flows. ##### Trading & DeFi React to pool updates, liquidations, position changes and large swaps in real time. Power bots, dashboards and risk engines with fresh on-chain signals. ##### NFT & gaming Track mints, transfers and in-game asset movements as they happen. Build engaging experiences around live on-chain events and player actions. ##### Monitoring & observability Trigger alerts on abnormal activity, failed operations or protocol incidents. Feed logging and monitoring systems with structured event data. ##### Risk & compliance Track suspicious flows, high-risk addresses and large transfers in real time. Enrich AML, KYC and fraud detection pipelines with live blockchain events. [Documentation](https://docs.crypto-chief.com/) [Create your first stream ](https://auth.crypto-chief.com/registration) ## Pricing that grows with your needs. ### Free Start building on Web3 — no credit card. ##### $0 - 5 reqs/sec RPC - 5 reqs/min Unified API - 1 req/day AML - Ultimate chains - WSS, Statistics - Community support [Get started ](https://auth.crypto-chief.com/registration) ### Pay for use Flexible pay-as-you-go for any workload. ##### From $10 - 400 reqs/sec RPC - 300 reqs/min Unified API - 5 reqs/sec AML - EventStream - Ultimate chains - WSS, Whitelists, Statistics - Support portal [Get started](https://auth.crypto-chief.com/registration) ### Subscription From $500 monthly plus 20% extra value. ##### From $500 - 400 reqs/sec RPC - 300 reqs/min Unified API - 5 reqs/sec AML - EventStream - Ultimate chains - WSS, Whitelists, Statistics - Support portal [Get started ](https://auth.crypto-chief.com/registration) ### Enterprise Tailored solution for expert builders ##### Custom terms All Subscription features plus: - Flexible rate limits - Engineering team support - Custom SLA - Personal manager [Contact Sales ](/contact/) ## Got questions? learn more about EventStream ## What is EventStream? EventStream is a real-time blockchain events service that streams transfers, contract events, blocks and other on-chain activity to your backend using webhooks or streaming protocols. You subscribe once and receive fresh data without manual polling. ## How is EventStream different from Unified API or the RPC Gateway? RPC Gateway and Unified API are pull-based: your app asks for data when needed. EventStream is push-based: it continuously sends events to your backend the moment they appear on-chain. They work best together — Unified API for historical queries and EventStream for live updates. ## Which event types can I subscribe to? You can subscribe to native transfers, token transfers, contract logs, method calls, new blocks and address activity. Filters let you narrow streams by address, topic, token or network to receive only relevant events. ## How do webhooks work and how are they secured? EventStream sends HTTP POST requests to your webhook URL with structured JSON payloads. Each request is signed so you can verify authenticity, and you can restrict delivery by IP or network. Retries and idempotency help avoid duplicates and missed events. ## What delivery guarantees does EventStream provide? EventStream is designed for zero-loss delivery with retries, ordering within a stream and idempotent payloads. If your endpoint is temporarily unavailable, events are retried and can be replayed over a selected range. ## Can I replay historical events if my backend was down? Yes. EventStream supports replaying events from a specific block height, timestamp or subscription checkpoint. This allows you to safely recover after outages and keep external systems consistent. ## What is the typical latency for EventStream? Latency depends on the network, but events are usually available within a few hundred milliseconds after they appear on-chain. For many chains, updates are streamed in near real time. ## How does pricing work for EventStream? EventStream uses usage-based pricing based on the number of delivered events and active subscriptions. You can start with a free tier for development and scale to higher volumes as your product grows. ## How do I start integrating EventStream? Set up a webhook endpoint, request an API key and create your first subscription by network, address or event type. Use our examples to test delivery and then plug EventStream into your production flows. ## Can I limit or throttle event delivery? Yes. You can configure rate limits, batching and backoff parameters for your webhooks. This prevents overloading your backend during network spikes or high on-chain activity. ## Does EventStream support enterprise-grade SLAs? Enterprise customers can access dedicated infrastructure, custom SLAs and private endpoints for critical workloads such as exchanges, payment systems or large-scale analytics platforms. ## Can I use EventStream together with Unified API and AML Intelligence? Absolutely. Unified API provides historical and analytical data, EventStream powers real-time event delivery, and AML Intelligence adds risk and compliance context. Together they form a complete Web3 data and monitoring platform. #### Start streaming blockchain events in minutes [Get started with EventStream](https://auth.crypto-chief.com/registration)