Bitcoin Address Balance Lookup at Scale
Check balances for up to 500 Bitcoin addresses in a single API call. Powered by self-hosted Fulcrum nodes with ElectrumX failover - fast, reliable, and built for developers.
How It Works
Three simple steps to start checking Bitcoin address balances at scale.
Get Your API Key
Sign up with Google and get your API key instantly. No credit card required.
Send Addresses
POST up to 500 BTC addresses per request to our high-performance API.
Get Balances
Receive confirmed and unconfirmed balances in milliseconds. Real-time data from self-hosted Fulcrum nodes, with ElectrumX as automatic backup.
Built for Performance
Everything you need to integrate Bitcoin balance checks into your application.
Batch Lookup
Check up to 500 addresses in a single request. Optimized for high-throughput workflows.
Real-Time Data
Direct queries to self-hosted Fulcrum nodes (with ElectrumX backup) - no cached or stale data. Get live confirmed and unconfirmed balances.
Simple Pricing
Pay-per-check credits with no subscriptions. 1 sat = 1,000 credits.
Developer First
RESTful API with code examples in cURL, Python, JavaScript, Go, and PHP.
Addresses Checked
Uptime
Avg Response Time
Simple, Credit-Based Pricing
1 sat = 1000 credits. Pay with Bitcoin or Lightning. No subscriptions, no hidden fees. See pricing FAQ.
Basic
Perfect for testing
100,000 credits
- 100,000 address checks
- Up to 500 per request
- Lightning only
Starter
For small projects
1,000,000 credits
- 1,000,000 address checks
- Up to 500 per request
- Lightning + on-chain
Standard
For growing applications
10,000,000 credits
- 10,000,000 address checks
- Up to 500 per request
- Lightning + on-chain
Pro
For production at scale
100,000,000 credits
- 100,000,000 address checks
- Up to 500 per request
- Lightning + on-chain