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fix(server): accept up to 20 MCP OAuth redirect URIs so Google can register - #296
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…gister Google's MCP connector registers more than 5 redirect URIs, and the register endpoint refused it with invalid_redirect_uri. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Merge go: Tushar's explicit request in the T3 session ("fix it in our current bkmain and quickly deploy it now"), 2026-10-10. Free lane (no CODEOWNERS). All checks green on dd34521; the queued Blacksmith 'Transfer report artifact' job never runs on this fork (also pending on #294). |
This was referenced Oct 11, 2026
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Problem
Google could not add the bkt3 MCP server. At 2026-10-10 16:23 UTC, Google (
108.177.67.129, user agentOpenAuth) sent an 857-byte request to/oauth/mcp/register. bkt3 answered HTTP 400 withRegister between 1 and 5 redirect URIs.(the 94-byte body in the trace log matches only this error). Google then showed "The Google redirect URL was rejected by the server".Fix
Raise
MAX_REDIRECT_URISfrom 5 to 20 inapps/server/src/auth/McpOAuth.ts. Each URI keeps its 512-character cap and the https/loopback rule. The edit is markedT3-CUSTOM(expbkt3). A fork test checks that 8 and 20 URIs register and 21 are refused.This goes straight to
bkmainat Tushar's request. The deploy restarts bkt3.🤖 Generated with Claude Code