What is the best alternative to Castles?

The top-rated alternatives to Castles in the Developer Tools category include Openapi MCP Server, Andrea9293 MCP, MCP Server Docker. These servers offer complementary or alternative capabilities depending on your deployment stack and authentication requirements.

How do Castles alternatives differ in installation and runtime?

Castles 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 Castles 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 Castles 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 Castles

Looking for an alternative to Castles? 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 Castles Specs →

Target Reference Server

Castles Overview

Query 2,400 curated castles, fortresses and palaces: search, nearby, fame ranking. Free, CC0.

Specification Matrix: Castles vs Alternatives

Server Name	Runtime	Auth	Pricing	GitHub Stars	Downloads	Action
C Castles (Target)	—	Free/None	Free	—	—	Current
Openapi MCP Server	Remote (SSE)	No auth required	Free	904	—	Compare →
Andrea9293 MCP	npx	Free/None	Free	344	—	Compare →
MCP Server Docker	uvx	No auth required	Free	744	—	Compare →
Next Devtools MCP	npx	No auth required	Free	824	—	Compare →
Formio MCP	npx	Free/None	Free	7	—	Compare →
UI5 MCP Server	npx	Free/None	Free	100	—	Compare →
Shadcn Ui MCP Server	npx	API key	Free	2,999	—	Compare →
Docker MCP	uvx	No auth required	Free	503	—	Compare →
Exogram Authority Runtime	npx	Free/None	Free	—	—	Compare →
MCP Graphql	npx	No auth required	Free	408	—	Compare →
ToughTongue AI	npx	Free/None	Free	7	—	Compare →
Pangolinfo Amazon Data MCP	npx	API key	Free	1	—	Compare →

Detailed Evaluation of Castles Alternatives

Openapi MCP Server

Runtime: Remote (SSE)

Explore OpenAPI v3 specifications, summarize APIs, and inspect the endpoints needed for a task through MCP.

Key Features:

OpenAPI specification discovery

Plain-language API summaries

Operation-level endpoint details

3 0 904

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Andrea9293 MCP

Runtime: npx

Local-first document management and semantic search for AI coding agents

2 0 344

Compare side-by-side

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 0 744

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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

5 0 824

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Formio MCP

Runtime: npx

Create and manage Form.io forms, resources, actions, roles, and projects from your AI agent.

2 0 7

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UI5 MCP Server

Runtime: npx

MCP server for UI5 application development

2 0 100

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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 2,999

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Docker MCP

Runtime: uvx

Manage Docker containers, compose stacks, logs, and status through MCP tools.

Key Features:

Create standalone containers

Deploy Docker Compose stacks

Retrieve container logs

3 0 503

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Exogram Authority Runtime

Runtime: npx

Model Context Protocol server for the Exogram Authority Runtime.

2 0

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MCP Graphql

Runtime: npx

Connects MCP clients to GraphQL endpoints for schema discovery and query execution, with mutations disabled by default.

Key Features:

GraphQL schema introspection

GraphQL query execution

Schema resource exposure

3 0 408

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ToughTongue AI

Runtime: npx

Create voice-agent scenarios, pull session analytics, place SIP calls, schedule meeting bots.

2 0 7

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Pangolinfo Amazon Data MCP

Runtime: npx

Provides 19 Amazon, WIPO, and PACER data tools through a Python client or hosted MCP endpoint.

Key Features:

19 Amazon, WIPO, and PACER data tools

Synchronous Python client

Hosted Streamable HTTP MCP endpoint

3 0 1

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Best Alternatives to Castles

Castles Overview

Specification Matrix: Castles vs Alternatives

Detailed Evaluation of Castles Alternatives

Frequently Asked Questions: Castles Alternatives