Support dict/list bodies in fetch() with automatic JSON serialization#33
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…rror When Claude passes a JSON object (dict) as the `body` parameter, FastMCP's Pydantic validation rejected it because `body` was typed as `str | None`. Now accepts `str | dict | list | None` and auto-serializes dicts/lists to JSON, also setting Content-Type: application/json when not already present. https://claude.ai/code/session_014xQUrZCmX99mTwb26tndQY
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Summary
Enhanced the
fetch()function to accept dict and list objects as request bodies, automatically serializing them to JSON format. This improves the API ergonomics by eliminating the need for callers to manually serialize JSON payloads.Key Changes
bodyparameter type annotation fromstr | Nonetostr | dict | list | NoneContent-Type: application/jsonheader when a dict/list body is provided (if not already set)Implementation Details
Content-Typeheader check is case-insensitive to avoid duplicate headershttps://claude.ai/code/session_014xQUrZCmX99mTwb26tndQY