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Ldap MCP

ldap-mcp server

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ldap-mcp

MCP server for read-only LDAP directory operations.

Installation

uv add ldap-mcp
# or
pip install ldap-mcp

Configuration

Set environment variables before running:

export LDAP_URI="ldaps://ldap.example.com:636"
export LDAP_BASE_DN="dc=example,dc=com"
export LDAP_BIND_DN="cn=readonly,dc=example,dc=com"
export LDAP_BIND_PASSWORD="secret"

# Optional: only return employee accounts in all searches
export LDAP_DEFAULT_FILTER="(employeeType=employee)"

All Environment Variables

Variable	Required	Default	Description
`LDAP_URI`	Yes	-	Server URI (ldap:// or ldaps://)
`LDAP_BASE_DN`	Yes	-	Default search base DN
`LDAP_BIND_DN`	No	-	Bind DN (empty = anonymous)
`LDAP_BIND_PASSWORD`	No	-	Bind password
`LDAP_DEFAULT_FILTER`	No	-	Filter ANDed to all searches
`LDAP_AUTH_METHOD`	No	`simple`	`simple` or `anonymous`
`LDAP_USE_STARTTLS`	No	`false`	Upgrade to TLS on port 389
`LDAP_TLS_VERIFY`	No	`true`	Verify TLS certificates
`LDAP_CA_CERT`	No	-	Path to CA certificate
`LDAP_TIMEOUT`	No	`30`	Connection timeout (seconds)

Usage

Run the server:

uvx ldap-mcp                    # stdio transport (default)
uvx ldap-mcp --transport sse    # SSE transport

Or if installed in a project:

uv run ldap-mcp

Claude Desktop

Add to claude_desktop_config.json (macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\):

{
  "mcpServers": {
    "ldap": {
      "command": "uvx",
      "args": ["ldap-mcp"],
      "env": {
        "LDAP_URI": "ldaps://ldap.example.com:636",
        "LDAP_BASE_DN": "dc=example,dc=com",
        "LDAP_BIND_DN": "cn=readonly,dc=example,dc=com",
        "LDAP_BIND_PASSWORD": "secret"
      }
    }
  }
}

Claude Code

Add via CLI:

claude mcp add --transport stdio \
  --env LDAP_URI=ldaps://ldap.example.com:636 \
  --env LDAP_BASE_DN=dc=example,dc=com \
  --env LDAP_BIND_DN=cn=readonly,dc=example,dc=com \
  --env LDAP_BIND_PASSWORD=secret \
  ldap -- uvx ldap-mcp

Or add to .mcp.json in your project root:

{
  "mcpServers": {
    "ldap": {
      "type": "stdio",
      "command": "uvx",
      "args": ["ldap-mcp"],
      "env": {
        "LDAP_URI": "ldaps://ldap.example.com:636",
        "LDAP_BASE_DN": "dc=example,dc=com",
        "LDAP_BIND_DN": "${LDAP_BIND_DN}",
        "LDAP_BIND_PASSWORD": "${LDAP_BIND_PASSWORD}"
      }
    }
  }
}

OpenCode

Add to ~/.config/opencode/config.json (or opencode.json in project root):

{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "ldap": {
      "type": "local",
      "command": ["uvx", "ldap-mcp"],
      "environment": {
        "LDAP_URI": "ldaps://ldap.example.com:636",
        "LDAP_BASE_DN": "dc=example,dc=com",
        "LDAP_BIND_DN": "{env:LDAP_BIND_DN}",
        "LDAP_BIND_PASSWORD": "{env:LDAP_BIND_PASSWORD}"
      }
    }
  }
}

Tools

ldap_search

Search LDAP directory with filters.

filter: "(objectClass=person)"
base_dn: "ou=users,dc=example,dc=com"  # optional
scope: "subtree"  # base, one, or subtree
attributes: ["cn", "mail", "uid"]  # optional
size_limit: 100

ldap_get_entry

Get a single entry by DN with all attributes.

dn: "cn=jdoe,ou=users,dc=example,dc=com"
attributes: ["*"]  # optional, defaults to all
include_operational: true  # include createTimestamp, etc.

ldap_get_schema

Browse LDAP schema definitions.

schema_type: "all"  # object_classes, attribute_types, or all
name_filter: "person"  # optional substring filter

ldap_compare

Compare an attribute value without retrieving the entry.

dn: "cn=jdoe,ou=users,dc=example,dc=com"
attribute: "memberOf"
value: "cn=admins,ou=groups,dc=example,dc=com"

Prompts

user_lookup

Guided workflow for finding users by name, email, or uid.

group_members

List members of an LDAP group with optional name resolution.

group_membership

Find all groups a user belongs to.

search_guide

LDAP filter syntax reference with examples.

Development

# Install dev dependencies
uv sync --group dev

# Run checks
make check    # lint + format + typecheck + test

# Run tests only
make test

# Auto-fix issues
make fix

License

MIT