Calibre-Web

io.github.ni-c/calibreweb-mcpv0.1.2Search

Read-only MCP server for Calibre-Web: library search, browsing and covers via the OPDS feed

The current version, v0.1.2, was published to the official MCP registry on 2026-08-18. It is distributed as calibreweb-mcp on npm and as the Docker image ghcr.io/ni-c/calibreweb-mcp:0.1.2, filed under Search by this index, and declares 4 environment variables. Removals and unreachable sources are measured across every server this index tracks, contract drift across the servers that answer in consecutive snapshots; the index's current counts put this record in context.

In-path gate · all MCP tools

Using Calibre-Web in Claude, Cursor, Gemini CLI, Cline, or Zed?

MCP tool contracts can change remotely with no version bump. The mcpindex gate pins each contract and HOLDs the call when it drifts-before your agent acts. Zero credentials. This is not the package install for this server itself (use Install this server for that).

Install the mcpindex gate (one command)

Rewrites your MCP host config so each server launches behind the gate. Inspect first: curl -fsSL https://mcpindex.ai/install.sh | less

uv tool install mcpindex-gate && mcpindex-config-wire

Auditable install path →Watch it hold a drift →

Trust verdict · v1 advisory · method

NOT YET SCREENEDno verdict on file

Verdict not yet evaluated for this tool. The semantic screen takes adversarial cases first; coverage rolls out as the corpus expands (15/150 labels to graduation). The deterministic conformance probe is built but has not yet run on the public corpus, so a recorded verdict here is REVIEW or UNVERIFIED, never a clearing ALLOW. Until a verdict is recorded, an agent should treat this tool as not-yet-cleared and fall back to its own checks. Method: the eval, four-state verdict, honest limits.

Own this server? Screen its description →

That verdict was true at screening time (snapshot 2026-08-19).

Contracts can change after screening, with no version bump. The gate pins Calibre-Web’s tool contracts on first sight and holds any silent change before your agent acts - the check that keeps being true on Tuesday.

See your first HOLD in 2 minutes →

Environment variables

CALIBRE_WEB_URL

required

Root URL of the Calibre-Web instance, e.g. https://books.example.com

CALIBRE_WEB_USERNAME

Username of the Calibre-Web account (web login); leave unset together with the password for anonymous-browsing instances

CALIBRE_WEB_PASSWORD

secret

Password of that account (web login password)

CALIBRE_WEB_INSECURE_TLS

Set to true to accept self-signed certificates (scoped to the configured host)

CALIBRE_WEB_URL

required

Root URL of the Calibre-Web instance, e.g. https://books.example.com

CALIBRE_WEB_USERNAME

Username of the Calibre-Web account (web login); leave unset together with the password for anonymous-browsing instances

CALIBRE_WEB_PASSWORD

secret

Password of that account (web login password)

CALIBRE_WEB_INSECURE_TLS

Set to true to accept self-signed certificates (scoped to the configured host)

MCP quality score · maturity, not trust · methodology

freshness

completeness

installability

documentation

stability

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Install this server

Claude Desktop (claude_desktop_config.json)

{
  "mcpServers": {
    "calibreweb-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "--",
        "calibreweb-mcp"
      ],
      "env": {
        "CALIBRE_WEB_URL": "<calibre_web_url>",
        "CALIBRE_WEB_USERNAME": "<calibre_web_username>",
        "CALIBRE_WEB_PASSWORD": "<your-calibre_web_password>",
        "CALIBRE_WEB_INSECURE_TLS": "<calibre_web_insecure_tls>"
      }
    }
  }
}

Cursor (.cursor/mcp.json)

{
  "mcpServers": {
    "calibreweb-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "--",
        "calibreweb-mcp"
      ],
      "env": {
        "CALIBRE_WEB_URL": "<calibre_web_url>",
        "CALIBRE_WEB_USERNAME": "<calibre_web_username>",
        "CALIBRE_WEB_PASSWORD": "<your-calibre_web_password>",
        "CALIBRE_WEB_INSECURE_TLS": "<calibre_web_insecure_tls>"
      }
    }
  }
}

Cline (cline_mcp_settings.json)

npx -y -- calibreweb-mcp

Claude Code (claude mcp add)

claude mcp add --scope user calibreweb-mcp -- npx -y -- calibreweb-mcp

Gemini CLI (gemini mcp add)

gemini mcp add -s user calibreweb-mcp npx -y -- calibreweb-mcp

Claude Desktop (Docker)

{
  "mcpServers": {
    "calibreweb-mcp": {
      "command": "docker",
      "args": [
        "run",
        "--rm",
        "-i",
        "--",
        "ghcr.io/ni-c/calibreweb-mcp:0.1.2"
      ],
      "env": {
        "CALIBRE_WEB_URL": "<calibre_web_url>",
        "CALIBRE_WEB_USERNAME": "<calibre_web_username>",
        "CALIBRE_WEB_PASSWORD": "<your-calibre_web_password>",
        "CALIBRE_WEB_INSECURE_TLS": "<calibre_web_insecure_tls>"
      }
    }
  }
}

Verdict API

curl -s mcpindex.ai/api/v1/trust/server/io-github-ni-c-calibreweb-mcp

Free-tier verdict as JSON: decision + dimensions + severity. Call it from your agent before it invokes a tool it just discovered.

Details

version: v0.1.2
category: Search
quality: 90 / 100
operator: ni-c

Listing

Listed from the official MCP registry. Unclaimed by its maintainer. Maintainer? Email us →

Provenance

Each verdict is bound to a hash of the exact description it judged, so a re-crawl that changes the text produces a new record rather than silently inheriting this one. Verdict history is hash-chained and anchored to Bitcoin via OpenTimestamps (latest confirmed at block 963,129). Verify it yourself.

Links

Repository →Website →