OpenAPI spec for official registry API (#3)
First (incomplete) cut of OpenAPI spec for registry API. To be continued in separate issues.
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Tadas Antanavicius
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api/openapi.yaml
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345
api/openapi.yaml
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openapi: 3.1.0
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info:
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title: MCP Server Registry API
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summary: API for discovering and accessing MCP servers metadata
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description: |
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REST API that centralizes metadata about publicly available MCP servers by allowing server creators to submit
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and maintain metadata about their servers in a standardized format. This API enables MCP client
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applications and "server aggregator" type consumers to discover and install MCP servers.
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version: 0.0.1
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contact:
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name: MCP Community Working Group
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license:
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name: MIT
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identifier: MIT
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servers:
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# TODO: Still think a unique name would be better; maybe we open a public discussion on the topic and let people submit ideas?
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- url: https://registry.modelcontextprotocol.io
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description: MCP Server Registry
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# TODO: Webhooks here would be interesting, but out of scope for MVP
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paths:
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/v0/servers:
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get:
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summary: List MCP servers
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description: Returns a list of all registered MCP servers
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parameters:
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- name: limit
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in: query
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description: Number of results per page (maximum 5000)
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schema:
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type: integer
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default: 5000
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maximum: 5000
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minimum: 1
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- name: offset
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in: query
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description: Number of results to skip for pagination
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schema:
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type: integer
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default: 0
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minimum: 0
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responses:
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'200':
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description: A list of MCP servers
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content:
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application/json:
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schema:
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$ref: '#/components/schemas/ServerList'
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/v0/servers/{id}:
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get:
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summary: Get MCP server details
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description: Returns detailed information about a specific MCP server
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parameters:
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- name: id
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in: path
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required: true
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description: Unique ID of the server
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schema:
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type: string
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format: uuid
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- name: version
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in: query
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description: Desired MCP server version
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schema:
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type: string
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responses:
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'200':
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description: Detailed server information
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content:
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application/json:
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schema:
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$ref: '#/components/schemas/ServerDetail'
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'404':
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description: Server not found
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content:
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application/json:
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schema:
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type: object
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properties:
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error:
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type: string
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example: "Server not found"
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components:
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schemas:
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jsonSchemaDialect: "https://json-schema.org/draft/2020-12/schema"
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Repository:
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type: object
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required:
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- url
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- source
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- id
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properties:
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url:
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type: string
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format: uri
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example: "https://github.com/modelcontextprotocol/servers"
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source:
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type: string
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enum: [github, gitlab] # TODO: Add all supported sources as a whitelist
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example: "github"
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id:
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type: string
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example: "b94b5f7e-c7c6-d760-2c78-a5e9b8a5b8c9"
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Server:
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type: object
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required:
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- id
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- name
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- description
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- repository
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- version_detail
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properties:
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id:
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type: string
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format: uuid
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example: "a5e8a7f0-d4e4-4a1d-b12f-2896a23fd4f1"
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name:
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type: string
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example: "@modelcontextprotocol/servers/src/filesystem"
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description:
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type: string
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example: "Node.js server implementing Model Context Protocol (MCP) for filesystem operations."
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repository:
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$ref: '#/components/schemas/Repository'
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version_detail:
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type: object
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required:
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- version
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- release_date
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- is_latest
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properties:
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version:
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type: string
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example: "1.0.2"
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description: Equivalent of Implementation.version in MCP specification.
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release_date:
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type: string
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format: date-time
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example: "2023-06-15T10:30:00Z"
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description: Datetime that the MCP server version was published to the registry.
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is_latest:
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type: boolean
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example: true
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description: Whether the MCP server version is the latest version available in the registry.
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$schema: "https://json-schema.org/draft/2020-12/schema"
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ServerList:
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type: object
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required:
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- servers
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- total_count
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properties:
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servers:
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type: array
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items:
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$ref: '#/components/schemas/Server'
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next:
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type: string
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format: uri
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example: "https://registry.modelcontextprotocol.io/servers?offset=50"
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total_count:
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type: integer
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example: 1
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Argument:
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type: object
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required:
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- name
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- description
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- is_required
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properties:
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name:
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type: string
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example: "path"
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description:
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type: string
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example: "Path to access"
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is_required:
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type: boolean
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example: true
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is_repeatable:
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type: boolean
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example: false
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is_editable:
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type: boolean
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example: true
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choices:
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type: array
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items:
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type: string
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example: []
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default_value:
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type: string
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example: "/Users/username/Desktop"
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PositionalArgument:
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allOf:
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- $ref: '#/components/schemas/Argument'
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- type: object
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required:
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- position
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properties:
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position:
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type: integer
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example: 1
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NamedArgument:
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allOf:
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- $ref: '#/components/schemas/Argument'
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- type: object
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properties:
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short_flag:
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type: string
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example: "-y"
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long_flag:
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type: string
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example: "--mount"
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requires_value:
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type: boolean
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example: true
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Subcommand:
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type: object
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required:
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- name
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- description
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properties:
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name:
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type: string
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example: "run"
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description:
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type: string
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example: "Run the Docker container"
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is_required:
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type: boolean
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example: true
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subcommands:
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type: array
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items:
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$ref: '#/components/schemas/Subcommand'
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positional_arguments:
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type: array
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items:
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$ref: '#/components/schemas/PositionalArgument'
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named_arguments:
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type: array
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items:
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$ref: '#/components/schemas/NamedArgument'
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Command:
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type: object
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properties:
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name:
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type: string
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enum: [npx, docker, pypi, uvx] # TODO: Add all supported commands as a whitelist
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example: "npx"
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subcommands:
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type: array
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items:
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$ref: '#/components/schemas/Subcommand'
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positional_arguments:
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type: array
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items:
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$ref: '#/components/schemas/PositionalArgument'
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named_arguments:
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type: array
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items:
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$ref: '#/components/schemas/NamedArgument'
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EnvironmentVariable:
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type: object
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required:
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- name
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- description
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properties:
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name:
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type: string
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example: "LOG_LEVEL"
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description:
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type: string
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example: "Logging level (debug, info, warn, error)"
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required:
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type: boolean
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example: false
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default_value:
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type: string
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example: "info"
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Package:
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type: object
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required:
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- registry_name
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- name
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- version
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properties:
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registry_name:
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type: string
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enum: [npm, docker, pypi, homebrew]
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example: "npm"
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name:
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type: string
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example: "@modelcontextprotocol/server-filesystem"
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version:
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type: string
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example: "1.0.2"
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command:
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$ref: '#/components/schemas/Command'
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environment_variables:
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type: array
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items:
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$ref: '#/components/schemas/EnvironmentVariable'
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Remote:
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type: object
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required:
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- transport_type
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- url
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properties:
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transport_type:
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type: string
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enum: [streamable, sse]
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example: "sse"
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url:
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type: string
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format: uri
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example: "https://mcp-fs.example.com/sse"
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ServerDetail:
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allOf:
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- $ref: '#/components/schemas/Server'
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- type: object
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properties:
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package_canonical:
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type: string
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enum: [npm, docker, pypi, crates]
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example: "npm"
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packages:
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type: array
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items:
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$ref: '#/components/schemas/Package'
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remotes:
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type: array
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items:
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$ref: '#/components/schemas/Remote'
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