PAYG vs Subscription Blockchain API Pricing: Which Fits Your Usage

The most common pricing question for blockchain API usage: should you pay as you go, or commit to a subscription? The answer depends on your usage pattern more than on price-per-unit.

PAYG makes sense when

Your usage is variable or unpredictable. A startup where traffic doubles some weeks and halves others. A tool that runs heavy backfills occasionally and light queries the rest of the time.

PAYG aligns cost with usage. When you're not using it, you don't pay.

For gRPC streaming (traffic-based PAYG), you pay per GB delivered. A single full Bitcoin backfill might cost a fixed amount; after that, you only pay for incremental new blocks.

Subscription makes sense when

Your usage is consistent and predictable. A production wallet serving thousands of daily users. Usage variation is small (plus or minus 20%).

At consistent volume, subscription almost always costs less per unit than PAYG. You also get higher rate limits, reserved capacity, and predictable monthly billing.

The breakeven calculation

Monthly cost at your expected usage:

• If usage × PAYG rate < subscription price → stay on PAYG
• If usage × PAYG rate > subscription price → subscription saves money

Include a buffer: if you're near breakeven, go with subscription - you don't want to optimize PAYG costs when a traffic spike hits.

Per-app billing at OverBlock

Each app has independent plans. A stream-app subscription (traffic-based) and a bitcoin-fees-advisor subscription (request-based) are separate line items with separate billing.

Example monthly cost calculation:

Usage: 50,000 bitcoin-fees API calls/day = 1.5M calls/month

PAYG at $0.0001/call:     $150/month
Subscription (1.5M credits): $89/month  ← better

Usage: 10,000 calls/day = 300K calls/month

PAYG at $0.0001/call:     $30/month
Subscription (300K credits): $49/month  ← PAYG better

See the billing documentation or the plan selector in the dashboard.