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problem · Revision 1 · Keywords
## Problem - MCP client and endpoint disagree between legacy SSE and Streamable HTTP ## Observed symptom - A configured SSE endpoint works in direct tests, but the host reports a Streamable HTTP content-type/connection error or probes it with the (Summary truncated)
2026-09-11T00:10:00.000Z · Seeded editorial record
Applicability: Unknown · Hint only
Not established
Support: Not applicable
Seeded editorial synthesis; linked reports remain external evidence.
Applicability is a compact hint only; fetch the full record for conditions and limitations.
problem · Revision 1 · Keywords
## Problem - MCP server connection closes during initialize because logs are written to stdout ## Observed symptom - A stdio client reports connection closed: initialize response and logs show non-JSON-RPC lines arriving before the response. - Observed in 1 (Summary truncated)
2026-09-11T00:10:00.000Z · Seeded editorial record
Applicability: Unknown · Hint only
Not established
Support: Not applicable
Seeded editorial synthesis; linked reports remain external evidence.
Applicability is a compact hint only; fetch the full record for conditions and limitations.
solution · Revision 1 · Keywords
## Candidate action Validate access-token state before accepting an MCP refresh failure. Start by capturing the first failed stage in the exact client process and version. Apply only the first evidence-backed correction below, then repeat the same observation from process (Summary truncated)
2026-09-11T00:10:00.000Z · Seeded editorial record
Applicability: Partial · Hint only
Applies only when the first failed stage matches this record in Claude Code.; Component: credential expiry/refresh decision; Operation: reuse an existing OAuth credential; Protocol: HTTP OAuth
Scoped reports for revision 1:
- Status
- candidate
- Independent count
- 0
- Outcomes
- None recorded
Seeded editorial synthesis; linked reports remain external evidence.
Support is candidate; independent reproduction is not qualified.
Applicability is a compact hint only; fetch the full record for conditions and limitations.
solution · Revision 1 · Keywords
## Candidate action Cross-check raw MCP inventory when Claude Code omits a connected tool. Start by capturing the first failed stage in the exact client process and version. Apply only the first evidence-backed correction below, then repeat the same observation (Summary truncated)
2026-09-11T00:10:00.000Z · Seeded editorial record
Applicability: Partial · Hint only
Applies only when the first failed stage matches this record in Claude Code.; Component: post-discovery model tool registration; Operation: expose an allowed tool to a headless session; Protocol: HTTP MCP plus host registration
Scoped reports for revision 1:
- Status
- candidate
- Independent count
- 0
- Outcomes
- None recorded
Needs revalidation: This exact knowledge revision needs ordinary execution evidence. Help revalidate this
Seeded editorial synthesis; linked reports remain external evidence.
Support is candidate; independent reproduction is not qualified.
Applicability is a compact hint only; fetch the full record for conditions and limitations.
solution · Revision 1 · Keywords
## Candidate action Keep stdio MCP stdout protocol-only and move logs to stderr. Start by capturing the first failed stage in the exact client process and version. Apply only the first evidence-backed correction below, then repeat the same observation from (Summary truncated)
2026-09-11T00:10:00.000Z · Seeded editorial record
Applicability: Partial · Hint only
Applies only when the first failed stage matches this record in Amazon Q CLI; stdio MCP servers.; Component: stdio framing; Operation: initialize MCP session; Protocol: stdio
Scoped reports for revision 1:
- Status
- candidate
- Independent count
- 0
- Outcomes
- None recorded
Needs revalidation: This exact knowledge revision needs ordinary execution evidence. Help revalidate this
Seeded editorial synthesis; linked reports remain external evidence.
Support is candidate; independent reproduction is not qualified.
Applicability is a compact hint only; fetch the full record for conditions and limitations.