Home Docs Model Context Protocol 28 Sep 2026

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Versioning Published MCP Servers changedregistry/versioning

Nearest release: v2.1.284, published 4 hours before upstream edited the page. Shown because the two are within 24 hours of each other. Nothing here says the release caused the edit.

Upstream edited this page at 28 Sep 2026 21:57 UTC, give or take a minute or two: the time comes from Anthropic’s own sitemap rather than from a commit. This site recorded the change at 28 Sep 2026 22:07 UTC.

Upstream edited 28 Sep 2026 21:57 UTC

Recorded here 28 Sep 2026 22:07 UTC

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Lines−21removed

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First seen 14 Aug 2026 this site's first read of the page

Recorded edits3to this page, all time

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3838

3939As an error prevention mechanism, the MCP Registry prohibits version strings that appear to refer to ranges of versions.

4040

41| Example | Type | Guidance |

42| -------------- | ------------------- | ------------------------------ |

43| `1.0.0` | semantic version | **Recommended** |

44| `2.1.3-alpha` | semantic prerelease | **Recommended** |

45| `1.0.0-beta.1` | semantic prerelease | **Recommended** |

46| `3.0.0-rc.2` | semantic prerelease | **Recommended** |

47| `2025.11.25` | semantic date | Recommended |

48| `2025.6.18` | semantic date | Recommended **(⚠️Caution!⚠️)** |

49| `2025.06.18` | non-semantic date | Allowed **(⚠️Caution!⚠️)** |

50| `2025-06-18` | non-semantic date | Allowed |

51| `v1.0` | prefixed version | Allowed |

52| `^1.2.3` | version range | Prohibited |

53| `~1.2.3` | version range | Prohibited |

54| `>=1.2.3` | version range | Prohibited |

55| `<=1.2.3` | version range | Prohibited |

56| `>1.2.3` | version range | Prohibited |

57| `<1.2.3` | version range | Prohibited |

58| `1.x` | version range | Prohibited |

59| `1.2.*` | version range | Prohibited |

60| `1 - 2` | version range | Prohibited |

61| `1.2 \|\| 1.3` | version range | Prohibited |