Mojang Textures API

openapi: 3.2.0
info:
  title: Mojang Session Server Textures API
  description: Mojang's Yggdrasil session server (sessionserver.mojang.com) used in the Minecraft Java Edition login handshake. Exposes the canonical skin and cape texture lookup keyed by UUID, the client-side /join and server-side /hasJoined verification calls, and the SHA-1 blocked-server hash list.
  version: 1.0.0
  contact:
    name: Mojang Studios
    url: https://www.minecraft.net
  license:
    name: Mojang Brand and Asset Usage Guidelines
    url: https://www.minecraft.net/en-us/usage-guidelines
  x-generated-from: documentation
  x-last-validated: '2026-05-30'
servers:
- url: https://sessionserver.mojang.com
  description: Mojang Yggdrasil session server (production)
security: []
tags:
- name: Textures
  description: Player skin and cape texture lookup
paths:
  /session/minecraft/profile/{uuid}:
    get:
      operationId: getSessionProfile
      summary: Get Session Profile (Skin and Cape)
      description: Returns the player's session profile including the Base64-encoded textures property holding skin and cape URLs. Pass unsigned=false to receive a signed payload that includes Mojang's RSA signature.
      tags:
      - Textures
      parameters:
      - name: uuid
        in: path
        required: true
        description: Player UUID (hyphenated or unhyphenated).
        example: 853c80ef3c3749fdaa49938b674adae6
        schema:
          type: string
          pattern: ^[0-9a-fA-F-]{32,36}$
      - name: unsigned
        in: query
        required: false
        description: Set to false to include the Mojang signature on each property. When omitted, properties are returned without signature.
        example: false
        schema:
          type: boolean
      responses:
        '200':
          description: Session profile with textures property.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/SessionProfile'
        '204':
          description: UUID has no matching profile.
        '400':
          description: UUID parameter is not a valid Minecraft UUID.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '429':
          description: Rate limit exceeded (per-IP).
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
      x-microcks-operation:
        delay: 0
        dispatcher: FALLBACK
components:
  schemas:
    Error:
      type: object
      description: Standard Mojang error envelope.
      properties:
        error:
          type: string
          description: Error class name.
          example: ForbiddenOperationException
        errorMessage:
          type: string
          description: Human-readable error description.
          example: Invalid token.
        cause:
          type: string
          description: Optional cause classification.
          example: UserMigratedException
    SessionProperty:
      type: object
      description: A single signed session-profile property (e.g. textures).
      required:
      - name
      - value
      properties:
        name:
          type: string
          description: Property name (typically `textures`).
          example: textures
        value:
          type: string
          description: Base64-encoded JSON payload (skin / cape URLs and metadata).
          example: ewogICJ0aW1lc3RhbXAiIDogMTcwMDAwMDAwMDAwMCwKICAicHJvZmlsZUlkIiA6IC4uLgp9
        signature:
          type: string
          description: Mojang RSA signature of `value`. Present only when the request included `unsigned=false`.
          example: a1b2c3d4...==
    SessionProfile:
      type: object
      description: A signed session profile with textures and metadata properties.
      required:
      - id
      - name
      - properties
      properties:
        id:
          type: string
          description: Player UUID without hyphens.
          example: 853c80ef3c3749fdaa49938b674adae6
        name:
          type: string
          description: Player username.
          example: jeb_
        properties:
          type: array
          description: Signed property list (currently only `textures`).
          items:
            $ref: '#/components/schemas/SessionProperty'
        profileActions:
          type: array
          description: Sanctions or actions Mojang has taken on the profile.
          items:
            type: string
            example: FORCED_NAME_CHANGE
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: JWT
      description: Minecraft access token (used in /join request body, not as a header).