Library Genesis MCP server (jmrplens/libgen-mcp v2.0.1): federated book/paper search, download and read across LibGen and open-access sources. No account, API key or cookie required, unlike annas-mcp.
The flake's pinned nixpkgs only ships Go 1.26 and upstream needs Go 1.27, so package the prebuilt static release binaries (same approach as yarr).
Upstream iosifache/annas-mcp is unmaintained since 2026-06-26 and returns HTTP 403 on all requests because Anna's Archive added a DDoS-Guard browser check. The fork is 24 commits ahead, passes DDoS-Guard via ANNAS_ACCOUNT_COOKIE, fixes pagination/filters, and updates the MCP SDK.
Use the hermes-agent/pdf-mcp fork (commit 356e476) which adds a bbox
crop parameter to get_page_image so it can render just a figure region
as a small PNG.
MCP server for reading, rendering, and searching PDF files using PyMuPDF.
Exposes get_page_text, get_page_image (render page as PNG), search_text.
Python, so it spawns reliably under the mcp-gateway stdio backend.
Building yarr from source (Rust) takes ~5+ min and times out the
config-nixos CI runner (3h limit) when combined with the full
perlis+wilkes+relay flake check. Use the pre-built x86_64-linux binary
from GitHub releases instead — fast fetch, no Rust toolchain needed.
Removes the rust-nixpkgs flake input (no longer needed).
yarr needs rustc 1.97.1. The mcp-servers flake's own nixpkgs has 1.95,
but consuming flakes (config-nixos) pin a newer nixpkgs with 1.97.1.
Since rustPkgs defaults to the consuming pkgs, yarr builds fine in the
overlay there. Remove the removeAttrs exclusion.
yarr needs rustc 1.97.1 but the main nixpkgs input (pinned by flake.lock)
has rustc 1.95.0. Bumping the main input breaks aioimaplib (email server
dep), so add a separate rust-nixpkgs input pinned to a newer rev.
yarr is excluded from the overlay (which uses the main nixpkgs) — build
it via 'nix build .#yarr' on the flake directly.
Replaces the Node.js-based mcp-arr-server and jellyfin-mcp backends
in the gateway with a single Rust binary that covers both *arr and
Jellyfin. Rust binaries work through the gateway's stdio spawn
(where Node.js ones fail with 401).
The upstream package.json has no 'bin' field, so buildNpmPackage produced
no executable and the gateway could not spawn it ('No such file or
directory'). Add a makeWrapper that runs node dist/index.js.
Packages MCP servers currently used by Hermes that were not yet in this
repo. Real hashes computed via nix build on wilkes; nix flake check passes.
- annas-mcp: Go, buildGoModule (re-added, previously dropped as broken)
- bitwarden-mcp: npm @bitwarden/mcp-server
- mcp-email-server: Python, buildPythonApplication
- namecheap-mcp: npm namecheap-api-mcp
- navidrome-mcp: npm navidrome-mcp
- ovhcloud-mcp: npm from GitHub, tsc build step
- slskd-mcp: Python, fastmcp wrapper
- sabnzbd-mcp: original upstream (jmagar/sabnzbd-mcp) was deleted from
GitHub (404). Repoint to jasonpaulso/sabnzbd-mcp fork, which preserves
the same file layout and the /sabnzbd/api string postPatch rewrites.
- annas-mcp: remove package that was never completed (lib.fakeHash
placeholders) and is not referenced anywhere in config-nixos. It was
breaking 'nix flake check'.
hermes-agent
hermes-agent
luis
hermes-agent