Simplifying On-Chain Data Access

On-chain data serves as the essential foundation for web3 applications, yet accessing this data efficiently remains a challenge for many developers. Existing indexer solutions often suffer from slow response times, limited capabilities, or high costs, which can hinder reliable scalability. The Sequence Indexer, together with the Indexer Gateway, provides an alternative approach that offers fast and flexible access to structured on-chain data across multiple blockchains.

Simplifying On-Chain Data Access

SKALE Network as a Scalable Infrastructure

SKALE is a multichain network composed of blockchains that operate with zero gas fees and instant transaction finality. This structure supports fast and scalable applications without negatively impacting the user experience.

Because of these features, SKALE provides a strong foundation for tools like Sequence Indexer to deliver near-instant and cost-free data access at scale. This setup is particularly valuable for real-time updates and frequent queries, which are essential for powering interactive games, marketplaces, and AI-driven decentralized applications.

Simplifying On-Chain Data Access

Sequence Provides Simplified Multichain APIs

Sequence Indexer offers a single API that simplifies the process of querying and filtering on-chain data across multiple blockchains, including both SKALE’s testnet and mainnet. Developers can use this API to retrieve native token balances, non-fungible tokens (NFTs), and ERC20 tokens, as well as to access complete transaction histories for any wallet or contract.

Additionally, token metadata such as images, names, collections, and traits are included directly in the API responses. The Indexer also supports filtering data by block number, contract address, token ID, and other parameters, enabling developers to perform multichain queries with one unified call. This eliminates the need to combine multiple APIs or decode raw contract data manually, as Sequence returns clean and enriched metadata by default.

Enabling Real-Time Web3 Updates

The Sequence platform supports both WebSocket and webhook functionalities, allowing applications to listen for and respond to on-chain events in real time. The near-instant finality of SKALE blocks ensures these updates occur without delay. Developers can subscribe to contract events, token transfers, NFT mints, balance changes, and other blockchain occurrences.

This capability allows for responsive user experiences, such as triggering in-game rewards, updating user interfaces, or running backend processes immediately after relevant blockchain events. Setting up a webhook with Sequence involves selecting the contracts and events to monitor and providing a webhook URL, after which the system handles the rest.

Simplifying On-Chain Data Access

Integration with SKALE Builder Environment

Sequence Indexer is integrated directly into the SKALE Builder interface, offering developers a sandbox environment where queries can be tested and executed without any setup. The Builder UI includes pre-configured API calls, parameter editing tools, and options to switch between SKALE testnet and mainnet. A demo video recorded by James Lawton, Head of Developer Relations at Sequence, demonstrates practical usage of the Indexer.

The walkthrough covers selecting SKALE chains, querying token balances and NFT metadata, applying automatic metadata spam filtering, setting up webhooks to listen to contract events, and running live API tests. The demo highlights the Indexer’s speed, showing complete query responses in just over 350 milliseconds, which is adequate for real-time gameplay and dynamic frontend updates. Additionally, developers can export queries in TypeScript or raw formats for integration into their projects.

Secure and Scalable Data Access

To address concerns about exposing infrastructure when delivering on-chain data to end users, the Sequence Indexer Gateway provides scoped and secure API access. This service is particularly suited for consumer-facing applications such as wallets and dashboards.

It allows developers to issue API keys with specific scopes and rate limits, restrict access to particular endpoints, contracts, or chains, and serve data from a managed gateway layer. Usage can be monitored and throttled to ensure stable performance. This approach enables developers to control access to on-chain data precisely, without the need to maintain backend servers or risk infrastructure exposure.

Simplifying On-Chain Data Access

Developer-Centric Design and Architecture

Sequence is designed as an all-in-one web3 development platform to help teams deliver applications faster without managing low-level infrastructure. The Indexer includes token metadata in every response and supports multichain queries through a single API call.

WebSocket support is built in for real-time updates, with plans to add NFT and ERC20 pricing information soon. Because there is no infrastructure to maintain, developers can focus on building rather than managing servers. For teams migrating from legacy providers such as SimpleHash, Sequence provides backwards-compatible endpoints and dedicated support to facilitate a smooth transition.

Facilitating Access to On-Chain Data

Sequence Indexer on SKALE addresses many of the traditional difficulties in accessing on-chain data by delivering fast, flexible, and secure API solutions optimized for multichain environments. Its real-time update capabilities, straightforward webhook setup, and tight integration with SKALE Builder allow developers to create responsive and data-rich web3 applications with reduced complexity.

Whether building NFT marketplaces, gaming asset trackers, or decentralized marketplaces, Sequence offers a practical data layer solution that is ready to use with a single API call. Developers interested in exploring the Sequence Indexer on SKALE can try the tool directly within the SKALE Builder, consult the Sequence documentation.