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ChainCheck API

Instant crypto address validation for 120+ chains.

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  • Free plan available
  • No credit card

What is ChainCheck API?

ChainCheck API is a validation tool that checks whether cryptocurrency addresses are correctly formatted and active across more than 120 blockchain networks. It works as an application programming interface (API), meaning developers integrate it into their own applications rather than using a standalone interface. The service is useful for anyone handling crypto transactions, from exchanges and wallets to payment processors and financial platforms. It reduces the risk of sending funds to invalid or malformed addresses, which could result in permanent loss of money. The tool supports many chains, covering major networks like Bitcoin and Ethereum alongside many smaller or newer blockchains.

Key features

Multi-chain validation

checks addresses across 120+ blockchain networks in a single request

API-based integration

designed for developers to embed validation into existing platforms or applications

Instant response

provides validation results without significant delay

Freemium access

offers a free tier alongside paid options for higher usage volumes

Format verification

confirms addresses follow correct syntax rules for their respective chains

Pros & cons

Advantages

  • Covers a broad range of blockchains, so users can validate addresses across most major and minor networks
  • API format makes it straightforward to integrate into wallets, exchanges, and payment applications
  • Free tier available for testing or low-volume use cases
  • Reduces transaction errors caused by invalid addresses

Limitations

  • Requires developer knowledge to implement; not suitable for non-technical users seeking a simple tool
  • Validation checks format correctness but cannot confirm an address is actively monitored or accessible

Use cases

Cryptocurrency exchanges validating user withdrawal addresses before processing transfers

Wallet applications checking recipient addresses before sending funds

Payment processors verifying crypto payment details from customers

Blockchain platforms confirming user-submitted addresses are valid before storing them

Financial services integrating address validation into their backend systems

Ready to try ChainCheck API?

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Pricing

Free

Free

Basic address validation across supported chains; limited API calls per month; suitable for testing and low-volume use

Paid

Contact for pricing

Higher API call limits; priority support; commercial use; custom integration support

Get started with ChainCheck API

Click through to ChainCheck API and start using it now.

Try ChainCheck API free
  • Free plan available
  • No credit card