> ## Documentation Index > Fetch the complete documentation index at: https://docs.embedreach.com/llms.txt > Use this file to discover all available pages before exploring further. # Get Segment Schema Catalog > Get the fields and schema relationships available when building a tenant segment, including every schema reachable through a relationship hop. ## OpenAPI ````yaml GET /api/segments/schema-catalog openapi: 3.0.0 info: title: Reach API version: 1.0.0 description: API documentation for Reach platform servers: - url: https://api.embedreach.com description: Production server security: [] paths: /api/segments/schema-catalog: get: tags: - Segments summary: Get Segment Schema Catalog description: >- Get the fields and schema relationships available when building a tenant segment, including every schema reachable through a relationship hop. parameters: - name: reach-tenant-id in: header required: false schema: type: string description: >- If using a platform scoped JWT, you can pass in a header to impersonate a specific tenant to impersonate the request as. responses: '200': description: Status 200 response content: application/json: schema: type: object properties: success: type: boolean message: type: string data: type: object properties: contactSchemaId: type: string nullable: true description: The schema mapped as the primary contact source schemas: type: array items: type: object properties: id: type: string description: The schema id name: type: string description: The schema name description: type: string nullable: true description: What this schema represents fields: type: array items: type: object properties: name: type: string description: >- The field name, as referenced by segment conditions type: type: string enum: - string - number - boolean - date - array - reference - unknown description: >- The field type, which determines the operators offered for it label: type: string description: Human-readable field name description: type: string description: What the field represents enum: type: array items: type: string description: >- The allowed values, when the field is an enum required: - name - type description: The fields exposed for segmentation externalIdField: type: string description: The field carrying the external identifier displayMetadata: type: object nullable: true properties: icon: type: object properties: type: type: string enum: - lucide value: type: string enum: - User - Users - Contact - Briefcase - Building2 - Home - Store - MapPin - ShoppingCart - Receipt - CreditCard - DollarSign - Package - Box - Truck - Car - Calendar - Clock - Ticket - Wrench - ClipboardList - FileText - Mail - MessageSquare - Phone - Bell - Tag - Tags - Hash - Flag - Star - Heart - Award - Gift - CircleCheck - Zap - Sparkles - Layers - Database - Dog required: - type - value color: type: string pattern: ^#[0-9a-fA-F]{6}$ reporting: type: object properties: status: type: object properties: path: type: string minLength: 1 maxLength: 200 required: - path additionalProperties: false effectiveDate: type: object properties: path: type: string minLength: 1 maxLength: 200 required: - path additionalProperties: false resourceLink: oneOf: - type: object properties: source: type: string enum: - field path: type: string minLength: 1 maxLength: 200 required: - source - path additionalProperties: false - type: object properties: source: type: string enum: - pattern pattern: type: string minLength: 1 maxLength: 2048 required: - source - pattern additionalProperties: false additionalProperties: false additionalProperties: false description: >- Icon and color the partner set in Data Integration required: - id - name - fields - externalIdField description: Every schema reachable for segmentation relationships: type: array items: type: object properties: id: type: string description: Stable identifier for this relationship sourceSchemaId: type: string description: The schema holding the foreign key targetSchemaId: type: string description: The schema the foreign key points at foreignKeyPath: type: string description: JSON path of the referencing property cardinality: type: string enum: - one - many description: >- Whether the source references one or many targets label: type: string description: Human-readable description of the hop required: - id - sourceSchemaId - targetSchemaId - foreignKeyPath - cardinality - label description: The hops between those schemas contactFields: type: array items: type: object properties: name: type: string description: >- The field name, as referenced by segment conditions type: type: string enum: - string - number - boolean - date - array - reference - unknown description: >- The field type, which determines the operators offered for it label: type: string description: Human-readable field name description: type: string description: What the field represents enum: type: array items: type: string description: The allowed values, when the field is an enum required: - name - type description: Fields conditions may target on the contact itself required: - contactSchemaId - schemas - relationships - contactFields required: - success '400': description: Bad Request - Validation or request error content: application/json: schema: type: object properties: success: type: boolean enum: - false default: false message: type: string description: Error message describing what went wrong errors: type: array items: type: string description: Optional array of specific validation errors required: - message ````