name: Numbers API FinOps
description: Financial operations guidance for teams consuming the Numbers API.
url: http://numbersapi.com/
cost:
  model: free
  currency: USD
  baselineMonthlyCost: 0.00
  notes: >
    The Numbers API is entirely free. There are no usage-based charges,
    subscription fees, or overage costs.
optimization:
  - strategy: Response Caching
    description: >
      Since the Numbers API returns static facts (the same number always
      yields the same response), cache responses aggressively. A long or
      infinite TTL cache eliminates repeat API calls entirely after the
      first fetch, reducing latency and protecting against any future
      service changes.
  - strategy: Server-Side Proxying
    description: >
      The API is HTTP-only. Route all API calls through a backend proxy
      to handle HTTPS for clients and apply caching at the proxy layer
      to minimize outbound calls.
  - strategy: Batch Pre-fetching
    description: >
      For applications that display facts about a predictable set of
      numbers (e.g., 1-100), pre-fetch and store all facts at startup
      rather than fetching on demand, eliminating runtime dependency on
      the external service.
risks:
  - type: Service Availability
    description: >
      The Numbers API is a community-maintained service with no published
      SLA. Implement graceful fallback messaging so applications remain
      functional if the service is temporarily unavailable.
  - type: No Versioning / Breaking Changes
    description: >
      There is no versioned API contract. Monitor for response format
      changes and test integrations periodically.