How to Use This Tool
Translate the number of affected integrations and available engineering capacity into an estimated duration. Compare that time with the provider’s published retirement date, then allow for testing, rollout windows and cutover work.
Why API Migration Capacity needs more than a raw total
Total migration hours divided by genuinely reserved weekly capacity exposes schedule risk early enough to reduce scope or add owners. For this page, the useful output is estimated migration duration. Compare it with the provider’s stated retirement date and do not reuse the estimate as a score for a different workflow.
The exact API Migration Capacity formula
Migration duration equals affected integrations multiplied by average effort per integration, divided by dedicated weekly hours. The visible fields are Affected endpoints or integrations, Average migration effort and Dedicated team capacity. Include endpoints only when each endpoint represents a separately tracked unit of migration work. Keep the same scope across the count and effort estimate; otherwise the duration may be arithmetically valid but operationally meaningless.
Interpreting estimated migration duration
Compare the duration with the provider shutdown date, reserve validation time and migrate the highest-traffic or least reversible integrations first. The ten-percent comparison is deliberately narrow: it tests the influence of affected endpoints or integrations and is neither a forecast nor a confidence interval. Preserve the values used, their dates and the resulting decision so a later reviewer can reproduce why API Migration Capacity supported the choice.
What this API Migration Capacity model leaves out
This assumes similar item effort and stable capacity; it excludes discovery gaps, provider delays, regression testing, freezes and dual-run periods. That is where API Migration Capacity stops being trustworthy. If an excluded factor could reverse estimated migration duration, extend the model explicitly or use the authoritative account system instead of hiding the factor inside an unexplained adjustment.
Evidence and independent verification
The reference reviewed for API Migration Capacity is GitHub Docs — REST API versioning. GitHub Docs — REST API versioning supports the named definition or rule but does not supply private values for estimated migration duration. Before acting on the result, reconcile the worked example with the relevant dashboard, invoice, export or measurement.
Private, reproducible calculation
API Migration Capacity runs its arithmetic in the current browser tab and requests no login or API key. That keeps the API Migration Capacity inputs away from the site's calculation server, while leaving the user responsible for detecting stale data or a changed platform rule. When an assumption changes, reopen GitHub Docs — REST API versioning and rerun the saved API Migration Capacity scenario.
Sources & assumptions
Tool Spec v2 · verified 2026-08-22. Platform rules and fees can change; the editable inputs remain authoritative for your account.
Official references
- GitHub Docs — REST API versioning (checked 2026-08-22)
Model assumptions
- Every input covers the same reporting period or cohort.
- This assumes similar item effort and stable capacity; it excludes discovery gaps, provider delays, regression testing, freezes and dual-run periods.
- The calculator uses only the visible fields and does not fetch account data.
