Glossary

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Glossary / Evaluation and implementation guide

API Versioning

API versioning is the practice of releasing API changes under labeled versions, commonly in the URL path or a header, so existing integrations keep working while new capabilities ship.

Versioning policy matters as much as the mechanism: how long old versions stay supported determines your maintenance burden.

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A practical example

Example: a vendor releases v3 of its contacts API and commits to supporting v2 for eighteen months.

Your team can migrate on its own schedule, testing the new pagination behavior in a staging environment before switching.

What to evaluate before investing

  • Ask how many API versions are currently live and the documented deprecation timeline for each.
  • Check whether breaking changes are announced by email, changelog, or status page, and how much notice is given.
  • Confirm whether versioned endpoints are available on your plan tier or reserved for enterprise contracts.

Limitations and tradeoffs

Versioning reduces surprise but does not eliminate work: deprecations still force migration projects. Some vendors patch behavior within a version, so 'stable' endpoints can still change in ways that affect parsing or field handling.

Plan your next step with MeshLine

Connect this decision to your automation, organic marketing and customer lifecycle management. In a MeshLine demo, discuss your existing tools, the scope you need and how to measure the result.

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