fastmcp.server.transforms.version_filter
Version filter transform for filtering components by version range.
Classes
VersionFilter
Filters components by version range.
When applied to a provider or server, only components within the version
range are visible. Within that filtered set, the highest version of each
component is exposed to clients (standard deduplication behavior).
Parameters mirror comparison operators for clarity:
Versions < 3.0 (v1 and v2)
server.add_transform(VersionFilter(version_lt=“3.0”))Versions >= 2.0 and < 3.0 (only v2.x)
server.add_transform(VersionFilter(version_gte=“2.0”, version_lt=“3.0”)) Works with any version string - PEP 440 (1.0, 2.0) or dates (2025-01-01). Args:version_gte: Versions >= this value pass through.version_lt: Versions < this value pass through.