The upstream ahujasid/blender-mcp and ahujasid/ableton-mcp GitHub repos
were hijacked on 2026-08-08: the maintainer (@sidahuj) publicly reported
his account was compromised and ownership stripped, and both repos now
redirect to an attacker-controlled org (MCPBlender, created the same
day, pushing new commits since).
Although our catalog pinned blender-mcp==1.6.4 from PyPI (pre-compromise,
sha256 verified unchanged), the server is only half the bridge: the
manifest's post-install instructions and the optional skill directed
users to download addon.py — arbitrary Python executed inside Blender —
from the now-compromised GitHub repo (the raw URL currently 404s, and
the addon ships in no PyPI artifact). There is no trustworthy source
for the addon half, so the entry cannot be installed safely end-to-end.
Removing the catalog entry and skill entirely until the maintainer
confirms account recovery; re-adding is a follow-up PR once upstream
is verified clean.
- optional-mcps/blender/: removed
- optional-skills/creative/blender-mcp/: removed
- docs: catalog rows, sidebar entry, skill pages (en + zh-Hans) removed
- cross-references in unreal-mcp and kanban-video-orchestrator cleaned
- tools.default_enabled: 20-tool curated subset (discovery, generation,
job lifecycle, billing). The server exposes ~37 tools; all-enabled adds
~16-22k tokens of schema to every API call — larger than the entire
Hermes core toolset (~12.7k). Curated default lands at ~9-12k. Batch,
saved/shared workflow, and App Mode tools remain opt-in via
'hermes mcp configure comfy-cloud'.
- report_session_summary excluded from defaults per telemetry policy
(no outbound telemetry without explicit user opt-in).
- description trimmed to catalog guideline length.
- revert pyproject data-files line: the per-entry packaging enforcement
was removed (no-pip policy); blender/unreal-engine entries have no
data-files lines either.
New catalog entry for Comfy Cloud's hosted remote MCP server at
https://cloud.comfy.org/mcp — Streamable HTTP with native MCP OAuth 2.1
(Dynamic Client Registration + PKCE), the same shape as the linear entry.
Nothing to install locally; Hermes's MCP client handles discovery and the
browser flow on first connect.
The server exposes ~30 tools for AI generation on Comfy Cloud: image /
video / audio / 3D via ComfyUI workflows (submit_workflow), curated
templates (run_template), and partner models like Flux, Kling, and Veo
(partner_generate), plus job lifecycle and discovery tools.
tools.default_enabled is left unset so the install-time checklist starts
all-on, mirroring the linear entry.
Also adds the per-entry data-files target in pyproject.toml per the
one-target-per-entry pattern documented there.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Figma's mcp.figma.com register endpoint is a client_name allowlist
(Claude Code / Codex succeed; Hermes Agent 403s) and returns a client
secret while advertising auth_method=none, then requires the secret on
token exchange. Auto-set client_name + client_secret_post for Figma
hosts, pass oauth cfg through login/add paths, force interactive OAuth
for hermes mcp login from non-TTY desktop shells, and ship a catalog
entry. Proven: hermes mcp login figma → 26 tools.
Catalog entries now follow the same supply-chain rules as pyproject
dependencies:
- n8n: install.ref main -> full commit SHA 7a9ae007 (2026-05-23,
branches/tags can be moved by the upstream owner; SHAs cannot)
- new contract test: every shipped manifest must pin exactly —
git installs need a 40-char SHA, uvx/npx-style launchers need
pkg==X / pkg@X with a digit-leading version (rejects bare names,
ranges, and npm dist-tags like @latest)
- module docstring documents the pin policy (exact version, 2-week
cooldown)
unreal-engine and linear are http transports (server runs elsewhere)
so there is nothing to pin at the transport layer.
Verified: unpinning blender-mcp in the manifest makes the contract
test fail with a named diagnostic; restoring the pin passes.
MCP catalog entries follow the same supply-chain rules as pyproject
dependencies: exact version pin, and the pinned release must be at
least 2 weeks old. blender-mcp 1.6.4 released 2026-06-11 (~5 weeks
old, also the latest release). uvx now resolves the exact version
instead of latest-at-launch.
Adds optional-mcps/blender (ahujasid/blender-mcp, stdio via uvx). The
server advertises 22 tools; 18 front optional asset services with no
upstream trim mechanism, so tools.default_enabled pins the install to
the core surface (scene/object info, viewport screenshot, code exec)
and the rest stay opt-in through 'hermes mcp configure blender'.
Manifests can now declare transport.env (static, non-secret subprocess
env vars), parsed/validated in _parse_manifest and written by
_build_server_config — used here to ship DISABLE_TELEMETRY=true per
the no-telemetry-without-opt-in policy. Runtime already honored
per-server env; manifests just couldn't declare it.
Epic's experimental Unreal MCP plugin embeds an MCP server inside the
Unreal Editor process, served over local HTTP (127.0.0.1:8000/mcp by
default). HTTP transport, no auth, no install block — the user enables
the plugin in-editor and Hermes connects to the URL.
Also drops test_optional_mcps_manifests_ship_in_both_wheel_and_sdist:
it asserted wheel/sdist packaging targets for pip/Homebrew/Nix installs,
which Hermes does not support — installs run from the repo checkout, where
the catalog is discovered by directory iteration with no packaging step.
* feat(mcp): Nous-approved MCP catalog with interactive picker
Adds an optional-mcps/ directory mirroring optional-skills/: curated,
Nous-approved MCP servers shipped with the repo but disabled by default.
Presence in optional-mcps/ = approval. No community tier, no trust signals.
Entries are added by merging a PR.
New surface:
hermes mcp Interactive catalog picker (default)
hermes mcp catalog Plain-text list, scriptable
hermes mcp install <name> Install a catalog entry
Picker behavior:
not installed -> install (clone/bootstrap if needed, prompt for creds)
installed/off -> enable
installed/on -> menu (disable / uninstall / reinstall)
Manifest schema (manifest_version: 1) supports:
- transport: stdio (command/args, ${INSTALL_DIR} substitution) or http (url)
- install: optional git clone + bootstrap commands (for repos that need
local venv setup, like the n8n bridge); omit for npx/uvx servers
- auth: api_key (prompts -> ~/.hermes/.env), oauth (provider-mediated
or native MCP), or none
Catalog entries are never auto-updated. Users re-run `hermes mcp install`
to refresh. Credentials always go to ~/.hermes/.env (the .env-is-for-secrets
rule), never to per-server env blocks.
Ships n8n as the reference manifest (https://github.com/CyberSamuraiX/hermes-n8n-mcp).
Tests: 19 catalog tests + E2E install/uninstall round-trip via the shipped
manifest.
* feat(mcp): tool-selection checklist + Linear catalog entry
Adds install-time tool selection so users only enable the MCP tools they
actually want, and ships Linear as a second reference catalog entry to
demonstrate the http+oauth path alongside n8n's stdio+api_key+git-bootstrap.
Tool selection flow:
install (clone/auth/credentials) ->
probe server for available tools ->
curses checklist with pre-checked rows ->
write mcp_servers.<name>.tools.include
Pre-check priority:
1. user's prior tools.include (reinstall preserves selection)
2. manifest's tools.default_enabled (curated subset)
3. all probed tools (default)
Probe-failure fallback (server unreachable, OAuth not yet complete,
backing service offline):
- manifest declared default_enabled -> applied directly
- no default declared -> no filter written (all-on when reachable)
- both cases point user at hermes mcp configure <name>
Manifest schema additions:
tools:
default_enabled: [list, of, tool, names] # optional
Updates:
- optional-mcps/linear/manifest.yaml -- new reference entry (http+oauth)
- optional-mcps/n8n/manifest.yaml -- tools.default_enabled set to the
8 read-mostly tools; mutating tools (activate/deactivate, container_logs)
pruned by default
- docs: new 'Tool selection at install time' section in features/mcp.md
Tests: 7 new tests in TestToolSelection covering probe-success / probe-fail
matrix, manifest-default filtering, reinstall-preserves-selection, and
invalid-default-enabled rejection. 26 catalog tests + 32 existing
mcp_config tests passing.
* feat(mcp): polish — picker unification, include-mode convergence, hardening
Addresses review findings on PR #30870. Lands all improvements that
belong in this PR before merge; defers separate cleanup (consolidating
two probe implementations, change-detector tests) to follow-ups.
Picker UX (mcp_picker.py)
- Unifies catalog + custom (user-added) MCPs in one view with distinct
status badges (available / enabled / installed (disabled) /
custom — enabled / custom — disabled)
- Adds 'Configure tools (probe server + re-pick)' action to both the
catalog-installed and custom-row submenus — the existing
hermes mcp configure flow was previously unreachable from the picker
- Loops until ESC/q so the user can manage several entries in one
session instead of having to re-launch
- Uninstall message now mentions .env credentials are preserved with a
pointer to clean them up manually if no longer needed
- Surfaces a 'requires a newer Hermes' warning per future-manifest
entry instead of silently hiding it
Catalog (mcp_catalog.py)
- catalog_diagnostics() exposes which manifests were skipped and why
(future_manifest vs invalid) so UIs can give actionable feedback
- _do_git_install detects SHA-shaped refs (regex /[0-9a-f]{7,40}/)
and skips the doomed 'git clone --branch <sha>' attempt — clone --branch
only accepts branches/tags, so SHAs always failed noisily before
falling back to the full-clone path
- Probe-success all-tools-enabled message now mentions that new tools
the server adds later will be auto-enabled (no-filter mode)
Convergence (tools_config.py)
- _configure_mcp_tools_interactive now writes tools.include (whitelist)
instead of tools.exclude (blacklist), matching the catalog flow and
hermes mcp configure. The on-disk config shape no longer depends on
which UI the user touched last
- Two existing tests updated to assert the new include-mode contract
Discoverability
- Setup wizard final step now prints 'Browse curated MCPs: hermes mcp'
- Three tip-corpus entries pointing at the new catalog
- Docs updated with: trust model (manifests run code locally, gated by
PR review, but read before installing), runtime ${ENV_VAR} substitution
semantics, and the manifest_version forward-compat behavior
Tests
- 7 new tests covering future-manifest diagnostics, custom MCP picker
rows, SHA-ref git-install path, branch-ref git-install path, and the
tools_config include-mode write contract
- 80 MCP-related tests passing across test_mcp_catalog.py,
test_mcp_config.py, test_mcp_tools_config.py
* fix(mcp): drop setup-wizard catalog hint to satisfy supply-chain scanner
The wizard line 'Browse curated MCPs: hermes mcp' triggered the
CI supply-chain scanner because it pattern-matches on edits to any
file named hermes_cli/setup.py — that filename matches the Python
'install-hook file' heuristic even though this setup.py is the
user-facing 'hermes setup' wizard, not a packaging install hook.
The catalog is already surfaced via three tip-corpus entries in
hermes_cli/tips.py (which the scanner doesn't flag), so dropping the
wizard mention loses no discoverability. Worth revisiting after a
scanner allowlist for this specific file lands.
Hermes Agent
Teknium
Matt Miller
Brooklyn Nicholson