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v4.15.0

punkpeye/fastmcpv4.15.0Aug 12, 2026by github-actions[bot]

AI Summary

Fixes stream handling for batch requests and introduces a new feature allowing server icons to be exposed in options.

Key Highlights

  • Preserve JSON-RPC batch envelopes
  • Release cancelled GET SSE streams
  • Expose MCP Implementation icons on ServerOptions

New Features

  • Expose MCP Implementation icons on ServerOptions

Full Release Notes

# [4.15.0](https://github.com/punkpeye/fastmcp/compare/v4.14.4...v4.15.0) (2026-08-12)


### Bug Fixes

* **edge:** preserve JSON-RPC batch envelopes ([#321](https://github.com/punkpeye/fastmcp/issues/321)) ([b8f43be](https://github.com/punkpeye/fastmcp/commit/b8f43be2dbb79bb6855204aae3748df11bc523b3))
* **edge:** release cancelled GET SSE streams ([#322](https://github.com/punkpeye/fastmcp/issues/322)) ([294d438](https://github.com/punkpeye/fastmcp/commit/294d438ce6cd98f908135feec6a1268e9cd27b93))


### Features

* **server:** expose MCP Implementation icons on ServerOptions ([#323](https://github.com/punkpeye/fastmcp/issues/323)) ([eb5fb65](https://github.com/punkpeye/fastmcp/commit/eb5fb655771ac5e15820a99254642c56b51a961c))