fix(server): return Invalid Params for malformed resource URIs - #2451
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felixweinberger merged 1 commit intoJul 7, 2026
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fix(server): return Invalid Params for malformed resource URIs#2451felixweinberger merged 1 commit into
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🦋 Changeset detectedLatest commit: 6ae0e98 The changes in this PR will be included in the next version bump. This PR includes changesets to release 1 package
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@modelcontextprotocol/client
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felixweinberger
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Jul 7, 2026
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Previously unaddressed
#2333 correctly returns -32602 with data.uri for a valid but unknown resource URI. A syntactically malformed URI still throws from new URL() and falls through the generic handler-error path.
This PR
Convert that parse failure to Invalid Params with the exact request value and a distinct data shape:
{ "uri": "...", "reason": "invalid_uri" }The extra reason keeps this distinguishable from ResourceNotFoundError's exact { uri } shape.
Verification
Follow-up to #2267, #2333, and #2286.