| Ecosystem | 0 | 0 |
| Match Graph | 0 | 0 |
| Pricing | Free | Free |
| Capabilities | 9 decomposed | 9 decomposed |
| Times Matched | 0 | 0 |
Creates, updates, and deletes calendar events through CalDAV protocol integration with Nextcloud servers. Implements RFC 4791 CalDAV specification to directly manipulate iCalendar (ICS) objects on the Nextcloud backend, enabling atomic event operations with full property support (title, description, start/end times, recurrence rules, attendees). Uses HTTP-based WebDAV operations (PUT/DELETE) to persist changes directly to the calendar collection on the server.
Unique: Direct CalDAV protocol implementation via MCP (Model Context Protocol) rather than REST wrapper, enabling LLM agents to manipulate calendars as first-class MCP resources with native iCalendar semantics
vs alternatives: Provides deeper calendar control than Google Calendar or Outlook APIs by exposing raw CalDAV operations, while maintaining Nextcloud's self-hosted privacy model without cloud vendor lock-in
Lists all calendars available to the authenticated user by querying the CalDAV PROPFIND method on the principal collection. Retrieves calendar metadata including display names, colors, descriptions, and access control properties (read-only vs read-write). Parses XML responses from the CalDAV server to construct a structured inventory of available calendar collections.
Unique: Uses CalDAV PROPFIND with DAV:resourcetype and CALDAV:calendar-description properties to enumerate calendars with full metadata in a single round-trip, rather than iterating through REST endpoints
vs alternatives: More efficient than polling individual calendar endpoints because PROPFIND returns all calendar metadata atomically, reducing network overhead compared to sequential REST API calls
Retrieves events from a calendar using CalDAV REPORT method with CALDAV:calendar-query filters. Supports filtering by date range (DTSTART/DTEND), event properties (summary, description), and recurrence expansion. Parses iCalendar (ICS) responses to construct structured event objects with full property access. Handles recurring events by expanding instances within the requested time window.
Unique: Implements CalDAV REPORT with calendar-query to filter events server-side before transmission, reducing bandwidth and processing overhead compared to fetching all events and filtering client-side
vs alternatives: More efficient than REST-based calendar APIs because server-side filtering reduces payload size and network round-trips, especially for calendars with hundreds of events
Manages event attendees by manipulating ATTENDEE properties in iCalendar objects. Adds, removes, or modifies attendee entries with role (REQ-PARTICIPANT, OPT-PARTICIPANT), participation status (NEEDS-ACTION, ACCEPTED, DECLINED), and RSVP flags. Updates the event's ORGANIZER property and sends invitations through the Nextcloud Calendar app's notification system. Handles attendee responses by updating PARTSTAT (participation status) in the event record.
Unique: Directly manipulates iCalendar ATTENDEE and ORGANIZER properties via CalDAV PUT operations, enabling programmatic attendee management without relying on email-based invitation workflows
vs alternatives: Provides atomic attendee updates compared to email-based invitation systems, which are asynchronous and unreliable; integrates directly with Nextcloud's notification system for immediate feedback
Modifies individual event properties (title, description, location, start/end times, categories, alarms) by parsing and updating iCalendar (RFC 5545) objects. Preserves existing properties while updating specified fields, maintaining iCalendar validity and server-side constraints. Handles timezone-aware datetime conversions and validates property formats before submission. Uses CalDAV PUT to atomically replace the entire event object with updated properties.
Unique: Implements full iCalendar RFC 5545 property semantics including timezone handling, recurrence rules, and alarm definitions, rather than exposing only a simplified event model
vs alternatives: Supports more complex event properties (alarms, categories, custom X-properties) than simplified REST APIs, enabling richer calendar applications at the cost of higher implementation complexity
Registers calendar operations as MCP (Model Context Protocol) tools with JSON Schema definitions, enabling LLM agents to invoke calendar functions through a standardized interface. Each tool (create event, list calendars, query events, etc.) is defined with input schema, output schema, and natural language descriptions. The MCP server translates tool invocations from the LLM into CalDAV operations, handling parameter validation and error mapping back to the agent.
Unique: Implements MCP protocol for calendar operations, providing LLM agents with a standardized tool interface that abstracts CalDAV complexity and enables multi-step calendar workflows through agent reasoning
vs alternatives: Enables LLM agents to use calendars as first-class tools (like Claude's native tool use) rather than requiring custom API wrappers, improving agent reasoning and reducing hallucination about calendar operations
Manages authentication to Nextcloud CalDAV servers using HTTP Basic Auth or Nextcloud app tokens. Stores and retrieves credentials securely (or as plaintext if not configured), constructs Authorization headers for CalDAV requests, and handles authentication failures with appropriate error messages. Supports both username/password and token-based authentication schemes compatible with Nextcloud's authentication system.
Unique: Implements CalDAV-compatible authentication (HTTP Basic Auth) with support for Nextcloud app tokens, enabling secure multi-user access without exposing user passwords to the MCP server
vs alternatives: Supports app tokens (Nextcloud-specific) in addition to basic auth, providing better security than password-only authentication while remaining simpler than OAuth2 implementations
Converts between local, UTC, and iCalendar TZID-based datetime representations. Parses DTSTART/DTEND properties with timezone identifiers (e.g., TZID=America/New_York), converts to UTC for storage, and reconstructs timezone-aware datetimes for display. Handles daylight saving time transitions and validates timezone identifiers against the system or Nextcloud server's timezone database.
Unique: Implements full iCalendar timezone semantics (TZID properties, VTIMEZONE components) rather than simplifying to UTC-only, enabling accurate representation of events in their original timezones
vs alternatives: Preserves timezone information in iCalendar format, preventing ambiguity when events are shared across systems, unlike simplified APIs that convert everything to UTC and lose timezone context
+1 more capabilities
Executes SQL queries against Supabase PostgreSQL instances through the Model Context Protocol, translating natural language or structured query requests into parameterized SQL statements. Uses MCP's tool-calling interface to expose database operations as callable functions with schema validation, enabling LLM agents to perform CRUD operations, joins, and aggregations with automatic connection pooling and credential management through Supabase client SDK.
Unique: Exposes Supabase PostgreSQL as MCP tools with automatic credential injection from Supabase client SDK, eliminating manual connection string management and enabling seamless LLM-to-database queries within Claude or compatible agents
vs alternatives: Tighter integration than generic SQL MCP servers because it leverages Supabase's built-in authentication and connection pooling rather than requiring separate database credential configuration
Exposes Supabase Auth session state and user metadata through MCP tools, allowing agents to inspect current authentication context, retrieve user profiles, and trigger auth-related operations. Integrates with Supabase's JWT-based auth system to validate sessions and access user claims without re-authenticating, using the Supabase client's built-in session management.
Unique: Integrates Supabase's JWT-based auth system directly into MCP tool interface, allowing agents to inspect and act on auth state without managing separate credential stores or re-authentication flows
vs alternatives: More seamless than generic auth MCP servers because it leverages Supabase's built-in session management and avoids redundant credential passing between agent and auth system
Invokes Supabase Edge Functions (serverless TypeScript/JavaScript functions) through MCP tools, passing parameters and receiving results with optional streaming support. Uses Supabase's edge function HTTP API to trigger functions with automatic authentication headers and response parsing, enabling agents to execute custom business logic without embedding it in the agent itself.
Supabase scores higher at 42/100 vs Nextcloud Calendar at 22/100.
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Unique: Exposes Supabase Edge Functions as MCP tools with automatic authentication and response parsing, allowing agents to invoke custom serverless logic without managing HTTP clients or credential injection
vs alternatives: More integrated than generic HTTP MCP tools because it handles Supabase-specific authentication, error handling, and response formatting automatically
Subscribes to real-time changes on Supabase tables through MCP's event streaming interface, using Supabase's PostgreSQL LISTEN/NOTIFY mechanism to push INSERT, UPDATE, and DELETE events to agents. Maintains persistent WebSocket connections and filters events by table and row-level policies, enabling agents to react to database changes without polling.
Unique: Bridges Supabase's PostgreSQL LISTEN/NOTIFY real-time system with MCP's tool interface, enabling agents to subscribe to database changes without managing WebSocket connections or event serialization
vs alternatives: More efficient than polling-based approaches because it uses Supabase's native real-time infrastructure rather than repeated database queries
Manages files in Supabase Storage buckets through MCP tools, supporting upload, download, list, and delete operations with automatic authentication and path-based access control. Uses Supabase's S3-compatible storage API with built-in support for public/private buckets and signed URLs for temporary access, enabling agents to handle file I/O without managing cloud storage credentials.
Unique: Exposes Supabase Storage's S3-compatible API as MCP tools with automatic authentication and signed URL generation, eliminating the need for agents to manage cloud storage credentials or generate temporary access tokens
vs alternatives: More integrated than generic S3 MCP tools because it leverages Supabase's built-in bucket policies and authentication rather than requiring separate AWS credentials
Performs semantic similarity searches on vector embeddings stored in Supabase PostgreSQL using pgvector extension, translating natural language queries into embedding vectors and executing cosine/L2 distance searches. Integrates with embedding providers (OpenAI, Cohere) or uses pre-computed embeddings, enabling agents to retrieve semantically similar documents or records without full-text search limitations.
Unique: Integrates pgvector directly into MCP tools with automatic embedding generation and distance calculation, enabling agents to perform semantic search without managing separate vector database infrastructure
vs alternatives: More efficient than external vector databases (Pinecone, Weaviate) for Supabase users because it colocates embeddings with relational data, reducing network latency and simplifying data synchronization
Exposes Supabase database schema information through MCP tools, allowing agents to discover table structures, column types, constraints, and relationships without manual schema documentation. Queries PostgreSQL information_schema and Supabase metadata tables to dynamically generate schema descriptions, enabling agents to construct valid queries and understand data relationships.
Unique: Queries Supabase's PostgreSQL information_schema directly through MCP tools, enabling agents to dynamically discover and adapt to database schemas without pre-configured schema definitions
vs alternatives: More flexible than static schema definitions because it reflects live database state, including recent migrations or schema changes
Enforces Supabase Row-Level Security policies within agent queries, ensuring that agents can only access rows permitted by RLS rules defined in the database. Evaluates policies based on authenticated user context (JWT claims, user ID) and applies WHERE clause filters automatically, preventing unauthorized data access at the database layer rather than application layer.
Unique: Delegates authorization enforcement to PostgreSQL RLS policies rather than implementing authorization in agent code, ensuring that data access rules are centralized and cannot be bypassed by agent logic
vs alternatives: More secure than application-level authorization because RLS is enforced at the database layer, preventing accidental data leaks even if agent code has bugs
+1 more capabilities