What is the best alternative to AddCal?

The top-rated alternatives to AddCal in the Developer Tools category include PDF Reader MCP, Claude Task Master, Next Devtools MCP. These servers offer complementary or alternative capabilities depending on your deployment stack and authentication requirements.

How do AddCal alternatives differ in installation and runtime?

AddCal and its alternatives vary by runtime requirement (Node.js/npx, Python/uvx, Docker, or remote HTTP/SSE endpoints). Check the specification comparison table above to verify command requirements before installing.

Are alternatives to AddCal free and open source?

Most MCP servers listed on AllMCPs are open source tools under MIT or Apache licenses that you can self-host or run locally with Claude Desktop, Cursor, VS Code, or Windsurf.

How do I side-by-side compare AddCal with a specific alternative?

Click the "Compare side-by-side →" button on any alternative card to see an in-depth comparison matrix covering feature lists, stars, npm downloads, install configurations, and schema specifications.

Developer Tools• MCP Alternatives Guide

Best Alternatives to AddCal

Looking for an alternative to AddCal? Whether you need a different runtime environment, custom authentication support, or alternative API integrations in the Developer Tools ecosystem, we have cataloged and compared the top alternative MCP servers below.

Browse all Developer Tools servers →View AddCal Specs →

Target Reference Server

AddCal Overview

AddCal MCP server connects AI clients to AddCal’s hosted service for publishing calendars and events that other people can subscribe to. It supports calendar and collection management, event creation and recurrence, subscriber and RSVP handling, invitations, and analytics. The remote streamable HTTP endpoint uses OAuth 2.1 with PKCE, so there is no local installation or API key. Reach for it when you manage a public schedule, programme, timetable, fixture list, or release calendar rather than a personal agenda.

Server Name	Runtime	Auth	Pricing	GitHub Stars	Downloads	Action
AddCal (Target)	Remote (SSE)	Free/None	Free	1	—	Current
PDF Reader MCP	npx	Free/None	Free	1,026	—	Compare →
Claude Task Master	npx	API key	Bring your own API key (usage-based cost)	28,192	—	Compare →
Next Devtools MCP	npx	No auth required	Free	825	—	Compare →
Hub MCP	Remote (SSE)	API key	Free	169	—	Compare →
Shadcn Ui MCP Server	npx	API key	Free	3,021	—	Compare →
Codesurface	uvx	No auth required	Free	21	—	Compare →
MCP Server Docker	uvx	No auth required	Free	745	—	Compare →
Magic MCP	npx	API key	Paid	5,986	1	Compare →
Mastercard Developers MCP	npx	No auth required	Free	56	—	Compare →
Exogram Authority Runtime	npx	Free/None	Free	—	—	Compare →
AI	npx	Free/None	Free	5	—	Compare →
MCP For API	Remote (SSE)	OAuth	Free	72	—	Compare →

Detailed Evaluation of AddCal Alternatives

PDF Reader MCP

Runtime: npx

Reads, searches, inspects, and cites local PDF content with page and bounding-box evidence over MCP.

Key Features:

Page-range PDF extraction

Page and bounding-box evidence

Literal and ranked document search

2 0 1,026

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Claude Task Master

Runtime: npx

Parses PRDs into structured tasks, expands implementation steps, and manages AI development work across multiple model providers.

Key Features:

PRD parsing

Task expansion

Task dependencies

9 0 28,192

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Next Devtools MCP

Runtime: npx

Verified

Connects coding agents to running Next.js 16+ dev servers for runtime errors, routes, logs, docs, and browser automation guidance.

Key Features:

Discovers running Next.js development servers

Proxies runtime errors, routes, logs, and metadata

Resolves Server Action IDs to source files

7 0 825

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Hub MCP

Runtime: Remote (SSE)

Verified

Searches Docker Hub and manages repositories through MCP, with optional PAT authentication for private operations.

Key Features:

Docker Hub Search V4 queries

Namespace and repository listing

Repository and tag existence checks

32 0 169

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Shadcn Ui MCP Server

Runtime: npx

Provides AI clients with shadcn/ui v4 components, blocks, demos, metadata, and multi-framework source access.

Key Features:

React, Svelte, Vue, and React Native implementations

Component source, demos, blocks, and metadata

GitHub-backed retrieval with caching

3 0 3,021

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Codesurface

Runtime: uvx

Indexes public APIs across supported languages and exposes compact MCP lookups for search, signatures, classes, stats, and reindexing.

Key Features:

Indexes public classes, methods, properties, fields, and events

Supports C#, C++, Go, Java, Python, TypeScript, and JavaScript

Provides keyword, signature, class, statistics, and reindex tools

3 0 21

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MCP Server Docker

Runtime: uvx

Manage Docker containers, images, networks, and volumes through MCP tools, prompts, and resource templates.

Key Features:

Natural-language container composition prompt

Container lifecycle management

Image build, pull, push, and removal

3 0 745

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Magic MCP

Runtime: npx

Generates and searches UI components through the 21st MCP, with legacy Magic compatibility and API-key authentication.

Key Features:

UI component generation

Component, theme, and template search

Design inspiration lookup

16 1 5,986

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Mastercard Developers MCP

Runtime: npx

Discover Mastercard services, read integration guides, and inspect API documentation and operations through MCP.

Key Features:

Mastercard service discovery

Documentation and page retrieval

OAuth 1.0a and OAuth 2.0 guides

2 0 56

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Exogram Authority Runtime

Runtime: npx

Connects MCP clients to Exogram Authority Runtime; the supplied README provides no server-specific tools or setup details.

Key Features:

MCP interface for Exogram Authority Runtime

Reference implementation repository context

MCP client integration context

2 0

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AI

Runtime: npx

Local-first MCP tooling for structuring, validating, translating, and reviewing content stored as JSON and Markdown.

Key Features:

27 MCP tools over stdio or HTTP

Model and content CRUD

Schema validation and canonical serialization

3 0 5

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MCP For API

Runtime: Remote (SSE)

Connect MCP clients to Appwrite Cloud or self-hosted Appwrite for API operations across core services.

Key Features:

Hosted Appwrite Cloud endpoint

Browser-based OAuth and scope consent

Database, user, function, team, and storage tools

2 0 72

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Best Alternatives to AddCal

AddCal Overview

Specification Matrix: AddCal vs Alternatives

Detailed Evaluation of AddCal Alternatives

PDF Reader MCP

Claude Task Master

Next Devtools MCP

Hub MCP

Shadcn Ui MCP Server

Codesurface

MCP Server Docker

Magic MCP

Mastercard Developers MCP

Exogram Authority Runtime

AI

MCP For API

Frequently Asked Questions: AddCal Alternatives