# NousResearch/hermes-agent · OpenRouter free-tier tool calling HTTP 404 errors

## Open now

- 1 issue, 1 PR open on GitHub.
- #49983: OpenRouter free models fail with HTTP 404: tool calling not supported on :free tier
- PR #50006: fix(agent): detect OpenRouter free-tier tool-calling errors (#49983)

Reports and a related fix attempt addressing HTTP 404 errors when tool calling is used with OpenRouter free-tier models, which do not support that feature.

## TL;DR

- 3 member(s): 1 open issue(s), 1 closed issue(s), 1 open PR(s), 0 merged PR(s), 0 PR(s) closed without merging.
- No fix has been merged to main; one or more PRs were attempted (see below).
- **Recommended:** review the prior/competing PR(s) below. A fix was attempted but not merged; your case may extend or revive that work.

## 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evidence (`STRUCTURAL_PARTIAL`): some members are connected by structural evidence (shared changed files, or a closing/superseded reference); the rest are joined by an automated relevance judgement over their text.
- Members outside that structural core may belong to a different underlying problem.
- Pairwise link density `0.45`: 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

- #49983: OpenRouter free models fail with HTTP 404: tool calling not supported on :free tier

## Closed / duplicate issues

- #49987: OpenRouter free-tier models fail with HTTP 404 — tool calling not supported on :free models

## Prior & competing PRs

- **#50006: fix(agent): detect OpenRouter free-tier tool-calling errors (#49983)**. open
  - maintainer direction: category `uncategorized`; implication `needs_llm`
  - files: `agent/conversation_loop.py`, `tests/agent/test_openrouter_tool_calling_hint.py`

## Fix status

- No merged fix on record.
- Subsystem: `agent`