Glossary

Explore Meshline

Products Pricing Blog Support Log In

Ready to map the first workflow?

Book a Demo

Glossary / Evaluation and implementation guide

Version Negotiation

Version negotiation is the runtime process where two connected systems agree on which API version to use for each exchange.

Instead of hardcoding one version, the client requests a version and the server confirms or downgrades to one it still supports.

This matters when a vendor deprecates an API mid-quarter while your side hasn't upgraded yet. It is a runtime agreement mechanism, distinct from API Versioning, which manages version strategy on one side only.

Explore this category

A practical example

Example: your MAP pushes leads to a CRM using a pinned API version. The CRM vendor ships a new version and announces deprecation.

With negotiation in place, each sync request states the supported version, and the CRM responds with the newest mutually accepted one, keeping records flowing while your team schedules the real upgrade.

What to evaluate before investing

  • Confirm whether the connector pins a version or negotiates per request, and where that setting lives.
  • Ask vendors for their deprecation notice period and whether negotiation extends it automatically.
  • Test upgrade behavior in a sandbox: force a version mismatch and observe the fallback response.

Limitations and tradeoffs

Not every API supports negotiation; many REST integrations still require explicit version pinning, which shifts the burden onto your upgrade calendar.

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.

Explore MeshLine solutionsEvaluate pricing and scopeBook a demo