# NousResearch/hermes-agent · CORS headers for run events SSE endpoint

## Open now

- 1 issue, 0 PRs open on GitHub.
- #6358: \[Bug\]: /v1/runs/{run_id}/events SSE endpoint missing CORS headers causes cross-origin requests to fail

The members concern CORS headers on the /v1/runs/{run_id}/events server-sent events endpoint of the API server. One is a bug report about cross-origin requests erroring, and three are pull requests proposing CORS changes; one of those also mentions flushing the stream head and reporting tool errors as \`tool.failed\`.

## TL;DR

- 4 member(s): 1 open issue(s), 0 closed issue(s), 0 open PR(s), 1 merged PR(s), 2 PR(s) closed without merging.
- A fix was merged to main in PR #121745. Verify it addresses your case.
- **Recommended:** read PR #121745 (and any competing PRs below) before filing. Confirm the merged change covers your symptom.

## Maintainer resolution verdict

- Internal-tracker verdict over this cluster's issue members: `unresolved`. This is distinct from the fix status above. Weigh it yourself.

## How this cluster was grouped

- Link evidence (`STRUCTURAL_SPANNING`): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.
- Pairwise link density `0.50`: the share of member pairs that carry a link, counting a structural link in full and a relevance-only link at 0.36. `1.00` means every pair is linked.

## Open related issues

- #6358: \[Bug\]: /v1/runs/{run_id}/events SSE endpoint missing CORS headers causes cross-origin requests to fail

## Prior & competing PRs

- **#121745: fix(api-server): CORS on every SSE stream, flush run-events head, report failed tools as tool.failed**. merged to main · fix tier `verified`
  - maintainer direction: category `merged`
  - files: `contributors/emails/195337306+0xGr1mm@users.noreply.github.com`, `gateway/platforms/api_server.py`, `gateway/platforms/api_server_openai_routes.py`, `gateway/platforms/api_server_runs.py`, `tests/gateway/test_api_server.py`, `tests/gateway/test_api_server_runs.py`, `tests/gateway/test_session_api.py`, `website/docs/user-guide/features/api-server.md`
- **#6367: fix(api_server): add CORS headers to /v1/runs/{run_id}/events SSE endpoint**. closed without merge
  - maintainer direction: category `uncategorized`; implication `needs_llm`; refs `346c14a9c5`, `#121745`, `#72892`
- **#106949: fix(api-server): send CORS headers on run events SSE stream**. closed without merge
  - maintainer direction: category `implemented_elsewhere`; implication `superseded`; refs `346c14a9c5`, `#121745`, `#72892`

## Fix status

- Merged to main in PR #121745 (cited above). No release data is tracked. Verify downstream.
- Fix last verified (merged) `2026-09-25`.
- Subsystem: `gateway`