# NousResearch/hermes-agent · Remove empty params._meta from outbound MCP requests

## Open now

- 1 issue, 2 PRs open on GitHub.
- #120923: Meta Ads MCP rejects empty params._meta emitted by Hermes (HTTP 400)
- PR #120961: fix(mcp): strip empty params._meta from outbound JSON-RPC before strict endpoints reject it
- PR #120965: fix(mcp): drop empty params._meta from outbound JSON-RPC requests (#120923)

These issues and fixes address a problem where empty params._meta fields in outbound JSON-RPC requests cause strict MCP endpoints (such as Meta Ads) to reject them with HTTP 400 errors. The proposed fix strips the empty field before sending.

## TL;DR

- 3 member(s): 1 open issue(s), 0 closed issue(s), 2 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evidence (`STRUCTURAL_SPANNING`): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.
- Pairwise link density `0.67`: 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

- #120923: Meta Ads MCP rejects empty params._meta emitted by Hermes (HTTP 400)

## Prior & competing PRs

- **#120961: fix(mcp): strip empty params._meta from outbound JSON-RPC before strict endpoints reject it**. open
  - maintainer direction: category `implemented_elsewhere`; implication `superseded`; refs `4277e1e4cf`, `#120965`
  - files: `tests/tools/test_mcp_empty_meta_strip.py`, `tools/mcp_tool_errors.py`, `tools/mcp_tool_transport.py`
- **#120965: fix(mcp): drop empty params._meta from outbound JSON-RPC requests (#120923)**. open
  - maintainer direction: category `uncategorized`; implication `needs_llm`; refs `#120923`
  - files: `tests/tools/test_mcp_empty_meta_strip.py`, `tools/mcp_tool_errors.py`, `tools/mcp_tool_transport.py`

## Fix status

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