name: ISBNdb API FinOps
description: Financial operations guidance for managing ISBNdb API costs and usage
url: https://isbndb.com/isbn-database
cost_model: subscription
billing_period: monthly
currency: USD
plans:
  - name: Basic
    monthly_cost: 14.99
    annual_cost: 179.88
    daily_calls: 1000
    cost_per_call: 0.01499
    notes: 7-day free trial available; no contract required
  - name: Academic
    monthly_cost: 14.99
    annual_cost: 179.88
    daily_calls: 2000
    cost_per_call: 0.0075
    notes: Discounted plan for academic and educational institutions
  - name: Premium
    monthly_cost: 35.99
    annual_cost: 431.88
    daily_calls: 5000
    cost_per_call: 0.0072
    notes: Includes bulk data access and all data fields
  - name: Pro
    monthly_cost: 99.99
    annual_cost: 1199.88
    annual_discounted: 765.00
    daily_calls: 15000
    cost_per_call: 0.00667
    notes: Annual plan available at discounted rate of ~$305/year per search results; includes real-time book prices
  - name: Enterprise
    monthly_cost: 299.99
    annual_cost: 3599.88
    daily_calls: 50000
    cost_per_call: 0.006
    notes: Highest tier with all features and priority support
cost_optimization:
  - tip: Monitor daily quota with GET /key endpoint to avoid unexpected throttling
  - tip: Use bulk POST /books endpoint to retrieve up to 1,000 ISBNs in a single call (Premium+ plans) to maximize value per API call
  - tip: Cache book metadata responses locally since book data changes infrequently
  - tip: Use /feeds/books/updates to pull only recently changed records rather than re-querying static data
  - tip: Consider annual billing for Pro plan to reduce cost by approximately 36%
  - tip: Academic institutions can use the Academic plan at Basic pricing with higher daily call limits
  - tip: Inspect ratelimit response headers to track quota consumption in real time
trial:
  available: true
  duration_days: 7
  plan: Basic
  notes: Free 7-day trial on the Basic plan; no credit card details mentioned as required upfront
cancellation: Monthly subscription; cancel any time; no contract