> ## Documentation Index > Fetch the complete documentation index at: https://confidence.spotify.com/llms.txt > Use this file to discover all available pages before exploring further. # Deriveevaluationcontextschema Client > Infer the schema of the evaluation context for a specific set of clients, that has previously been used to resolve one or more flags. ## OpenAPI ````yaml /api/flags/api/flag.openapi.json post /v1/clientEvaluationContextSchema:derive openapi: 3.1.0 info: title: Confidence Flag API version: 1.0.0 description: API documentation for flag servers: [] security: [] paths: /v1/clientEvaluationContextSchema:derive: post: summary: Deriveevaluationcontextschema Client description: >- Infer the schema of the evaluation context for a specific set of clients, that has previously been used to resolve one or more flags. operationId: Client.deriveevaluationcontextschema parameters: [] requestBody: content: application/json: schema: type: object properties: clients: type: array items: type: string description: >- The list of clients to infer the schema for. If empty, returns schema for all clients that the caller has permissions to. mustMatchSchema: type: object properties: schema: type: array items: type: object additionalProperties: type: object properties: types: type: array items: type: string enum: - KIND_UNSPECIFIED - NULL_KIND - NUMBER_KIND - STRING_KIND - BOOL_KIND description: The observed types. displayName: type: string description: Human friendly name of the field hidden: type: boolean description: If the field should be visible or not semanticType: type: object properties: country: type: object properties: format: type: string enum: - COUNTRY_FORMAT_UNSPECIFIED - TWO_LETTER_ISO_CODE description: What format the country is specified in. required: - format description: |2- If this is a country type, this specifies in what format. enumType: type: object properties: values: type: array items: type: object properties: value: type: string description: A possible value the enum can take. description: What allowed values exist for this enum. required: - values description: >- If this is an enum this specifies what value it has etc. entityReference: type: object properties: entity: type: string description: >- A reference to the entity that exists in this field.- required: - entity description: If this field is a reference to an entity. version: type: object description: If this field is a semantic type. date: type: object description: |2- If this field is a date. timestamp: type: object description: |2- If this field is a timestamp. description: >- Semantic type of a field. Makes it possible to narrow the number of possible values for a field etc. seenValues: type: array items: type: object properties: nullValue: type: string enum: - NULL_VALUE description: Represents a null value. numberValue: type: number description: Represents a double value. stringValue: type: string description: Represents a string value. boolValue: type: boolean description: Represents a boolean value. structValue: type: object description: Represents a structured value. listValue: type: object properties: values: type: array items: type: object description: >- Repeated field of dynamically typed values. description: Represents a repeated `Value`. description: Sample of values seen for this field. description: Schema of each field in the evaluation context. description: >- Filter the available options by finding only options that can be used in combination with this existing schema. For instance if field `country` is selected, only find schemas where `country` exists. required: true responses: '200': description: OK content: application/json: schema: type: object properties: clientSchema: type: array items: type: object properties: client: type: string description: Resource reference to a client. schema: type: object properties: schema: type: array items: type: object additionalProperties: type: object properties: types: type: array items: type: string enum: - KIND_UNSPECIFIED - NULL_KIND - NUMBER_KIND - STRING_KIND - BOOL_KIND description: The observed types. displayName: type: string description: Human friendly name of the field hidden: type: boolean description: If the field should be visible or not semanticType: type: object properties: country: type: object properties: format: type: string enum: - COUNTRY_FORMAT_UNSPECIFIED - TWO_LETTER_ISO_CODE description: What format the country is specified in. required: - format description: |2- If this is a country type, this specifies in what format. enumType: type: object properties: values: type: array items: type: object properties: value: type: string description: A possible value the enum can take. description: What allowed values exist for this enum. required: - values description: >- If this is an enum this specifies what value it has etc. entityReference: type: object properties: entity: type: string description: >- A reference to the entity that exists in this field.- required: - entity description: >- If this field is a reference to an entity. version: type: object description: If this field is a semantic type. date: type: object description: |2- If this field is a date. timestamp: type: object description: |2- If this field is a timestamp. description: >- Semantic type of a field. Makes it possible to narrow the number of possible values for a field etc. seenValues: type: array items: type: object properties: nullValue: type: string enum: - NULL_VALUE description: Represents a null value. numberValue: type: number description: Represents a double value. stringValue: type: string description: Represents a string value. boolValue: type: boolean description: Represents a boolean value. structValue: type: object description: Represents a structured value. listValue: type: object properties: values: type: array items: type: object description: >- Repeated field of dynamically typed values. description: Represents a repeated `Value`. description: Sample of values seen for this field. description: Schema of each field in the evaluation context. description: The evaluation context schema of the client. required: - client description: The client specific derived schemas. mergedSchema: type: object properties: schema: type: array items: type: object additionalProperties: type: object properties: types: type: array items: type: string enum: - KIND_UNSPECIFIED - NULL_KIND - NUMBER_KIND - STRING_KIND - BOOL_KIND description: The observed types. displayName: type: string description: Human friendly name of the field hidden: type: boolean description: If the field should be visible or not semanticType: type: object properties: country: type: object properties: format: type: string enum: - COUNTRY_FORMAT_UNSPECIFIED - TWO_LETTER_ISO_CODE description: What format the country is specified in. required: - format description: |2- If this is a country type, this specifies in what format. enumType: type: object properties: values: type: array items: type: object properties: value: type: string description: A possible value the enum can take. description: What allowed values exist for this enum. required: - values description: >- If this is an enum this specifies what value it has etc. entityReference: type: object properties: entity: type: string description: >- A reference to the entity that exists in this field.- required: - entity description: If this field is a reference to an entity. version: type: object description: If this field is a semantic type. date: type: object description: |2- If this field is a date. timestamp: type: object description: |2- If this field is a timestamp. description: >- Semantic type of a field. Makes it possible to narrow the number of possible values for a field etc. seenValues: type: array items: type: object properties: nullValue: type: string enum: - NULL_VALUE description: Represents a null value. numberValue: type: number description: Represents a double value. stringValue: type: string description: Represents a string value. boolValue: type: boolean description: Represents a boolean value. structValue: type: object description: Represents a structured value. listValue: type: object properties: values: type: array items: type: object description: >- Repeated field of dynamically typed values. description: Represents a repeated `Value`. description: Sample of values seen for this field. description: Schema of each field in the evaluation context. description: The schema created by merging the schema from all clients. capped: type: boolean description: >- True if the number of schema entries exceeded the processing limit and the result may be incomplete. Use evaluation context field overrides to manually define missing fields. security: - admin: [] servers: - url: https://flags.eu.confidence.dev - url: https://flags.us.confidence.dev - url: https://flags.confidence.dev components: securitySchemes: admin: type: http scheme: bearer ````