Blockscout Pro API: One Account for Multichain Onchain Data

Blockscout Pro API provides scalable, production-grade access to the same onchain data Blockscout explorers index and interpret every day, delivered through a single API account across dozens of chains and testnets.

It’s built for developers and teams who need blockchain data with higher limits, faster requests/sec, predictable pricing, and a clean way to support multichain applications without managing separate integrations per network.

Whether you’re building a dapp, wallet, analytics tool, AI agent, or internal workflow, Pro API is the simplest way to work with comprehensive onchain data at production scale.

What is Blockscout Pro API?

Blockscout Pro API is the paid, production-ready tier of Blockscout’s API offering.

It exposes indexed, decoded, and structured onchain data primarily through familiar explorer-style REST APIs, with support for commonly used Ethereum JSON-RPC methods.

This is the same enriched data Blockscout explorers use for transaction views, token pages, contract inspection, and debugging, including explorer-level context.

With Pro API, developers get:

• Higher rate limits and usage allowances
• Credit-based pricing that scales with demand
• Multichain access through a single API key and billing account
• A self-serve developer portal for keys, usage, and plans

Why Blockscout Pro API

One API account for multichain applications

Building multichain applications often means managing separate APIs, credentials, limits, and billing relationships for every network you support.

Blockscout Pro API removes that noise completely.

With a single API key, developers can access dozens of mainnets and testnets supported by Blockscout. You integrate once, then expand chain support without additional vendor setup or duplicated work.

Generous capacity at every tier

Blockscout Pro API is designed to offer substantially more usable capacity at each pricing tier than other services in the market. Higher request rates, larger usage allowances, and credit-based overages let developers process significantly more onchain data before running into constraints.

Comprehensive onchain data for programmable applications

Blockscout explorers do more than surface raw blockchain data. They index, decode, and structure onchain activity, and enrich it with explorer-level context so it can be inspected, understood, and debugged.

Blockscout Pro API exposes that same interpreted and enriched data in a form applications can build on. 

Instead of stitching together raw RPC calls, developers can query address- and contract-centric endpoints that include token metadata, proxy implementations, gas token balances, and other contextual details surfaced by the explorer.

This makes it possible to work with:

• Aggregated transaction histories and execution details
• Token and NFT activity with associated metadata
• Contract interactions with decoded inputs and proxy context
• Explorer-consistent views of onchain state across supported networks

Built to scale reliably

Pro API is designed for production workloads where usage grows over time and traffic patterns aren’t always predictable.

Credit-based pricing and clearly defined rate limits make scaling transparent, while infrastructure guardrails help ensure consistent behavior during traffic spikes or surges in network activity. Because production APIs shouldn’t break overnight when usage ramps up.

What you can build with Pro API

Blockscout Pro API supports a wide range of application patterns, including:

• Dapps & Wallets: Power transaction history, token balances, NFTs, and contract activity across multiple chains
• Bots, agents, and automation: Feed structured onchain data into bots, monitoring tools, or AI-driven workflows
• Analytics and research: Analyze onchain behavior, track activity across networks, and build dashboards
• Operational tooling: Use explorer-consistent data for debugging, monitoring, compliance workflows, or internal reporting

How it works

• Sign in to the Blockscout Dev Portal
  • Create an account and generate your API keys in minutes.

• Choose a plan
  • Start on the free tier, then upgrade as your usage grows with transparent, credit-based pricing.

• Query supported chains
  • Use standard REST or JSON-RPC endpoints, scoped by chain ID, with consistent pagination and responses.

• Monitor usage and scale confidently
  • Track API credits, rate limits, and usage patterns directly in the dashboard.

Proven in production

Blockscout explorers are used every day across thousands of networks by developers, users, and chains to inspect and understand onchain activity.

Pro API is built on that same infrastructure and data pipeline, formalized into a scalable API offering for teams who need to go beyond casual usage and into production.

Get started

You can start building with Blockscout Pro API today! Simply create an account in the Blockscout Dev Portal, generate your API key, and explore the Tier that’s right for you.