Mixedbread Billing API

openapi: 3.1.0
info:
  title: Mixedbread Billing API
  version: 0.1.0
  description: Mixedbread billing endpoints extracted from the canonical OpenAPI spec at https://api.mixedbread.com/openapi.json
servers:
- url: https://api.mixedbread.com
  description: mixedbread ai production server
- url: https://api.dev.mixedbread.com
  description: mixedbread ai development server
- url: http://127.0.0.1:8000
  description: mixedbread local server
- url: http://localhost:8000
  description: mixedbread local server
paths:
  /v1/billing/summary:
    get:
      tags:
      - billing
      summary: Get billing summary
      operationId: get_billing_summary
      responses:
        '200':
          description: Billing summary for the current period
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/BillingPeriodSummary'
      security:
      - ApiKeyAuth: []
  /v1/billing/stores:
    get:
      tags:
      - billing
      summary: List store cost information
      operationId: list_store_cost_info
      responses:
        '200':
          description: The list of store cost information
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/StoreCostListResponse'
      security:
      - ApiKeyAuth: []
  /v1/billing/stores/{store_id}/costs/histogram:
    get:
      tags:
      - billing
      summary: Get store cost histogram
      operationId: get_store_cost_histogram
      security:
      - ApiKeyAuth: []
      parameters:
      - name: store_id
        in: path
        required: true
        schema:
          type: string
          format: uuid
          description: The ID of the store
          title: Store Id
        description: The ID of the store
      responses:
        '200':
          description: Histogram of store costs over time
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/CostHistogramResponse'
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
  /v1/billing/parsing/costs/histogram:
    get:
      tags:
      - billing
      summary: Get parsing cost histogram
      operationId: get_parsing_cost_histogram
      responses:
        '200':
          description: Histogram of parsing costs over time
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/CostHistogramResponse'
      security:
      - ApiKeyAuth: []
components:
  schemas:
    AgenticSearchConfig:
      properties:
        max_rounds:
          type: integer
          maximum: 10.0
          minimum: 1.0
          title: Max Rounds
          description: Maximum number of search rounds
          default: 3
        queries_per_round:
          type: integer
          maximum: 10.0
          minimum: 1.0
          title: Queries Per Round
          description: Maximum queries per round
          default: 4
        strict_top_k:
          type: boolean
          title: Strict Top K
          description: Whether the final retrieved chunk list must provide exactly top_k ranked chunks
          default: false
        media_content:
          type: string
          enum:
          - auto
          - never
          - always
          title: Media Content
          description: Controls when retrieved image content is provided to the agent. `auto` sends images only when no OCR
            text or summary is available, `never` disables image content, and `always` sends image content when available.
          default: auto
        instructions:
          anyOf:
          - type: string
            maxLength: 5000
            minLength: 1
          - type: 'null'
          title: Instructions
          description: Additional custom instructions (followed only when not in conflict with existing rules)
        verbose:
          type: boolean
          title: Verbose
          description: 'Internal: when set, the response includes a `trace` field with the full tool-call timeline. Used by
            the Mixedbread playground; not part of the documented public API.'
          default: false
      type: object
      title: AgenticSearchConfig
      description: Configuration for agentic multi-query search.
    AgenticSearchTokenUsage:
      properties:
        prompt_tokens:
          type: integer
          title: Prompt Tokens
          description: Number of prompt tokens consumed
          default: 0
        completion_tokens:
          type: integer
          title: Completion Tokens
          description: Number of completion tokens generated
          default: 0
        total_tokens:
          type: integer
          title: Total Tokens
          description: Total tokens consumed (prompt + completion)
          default: 0
        cost_usd:
          type: number
          title: Cost Usd
          description: Estimated cost in USD
          default: 0.0
      type: object
      title: AgenticSearchTokenUsage
      description: Token usage and cost for LLM calls made during an agentic search.
    AgenticToolCall:
      properties:
        tool_call_id:
          type: string
          title: Tool Call Id
          description: Unique identifier for the tool call (gen_ai.tool.call.id)
        tool_name:
          type: string
          title: Tool Name
          description: Name of the tool invoked (gen_ai.tool.name)
          examples:
          - search_batch
        tool_type:
          type: string
          enum:
          - function
          - extension
          - datastore
          title: Tool Type
          description: Category of the tool (gen_ai.tool.type)
          default: function
        started_at:
          type: string
          format: date-time
          title: Started At
          description: Time when the tool call began
        duration:
          type: string
          format: duration
          title: Duration
          description: Time taken to execute the tool call
        arguments:
          additionalProperties: true
          type: object
          title: Arguments
          description: Arguments passed to the tool (gen_ai.tool.call.arguments)
        result:
          anyOf:
          - additionalProperties: true
            type: object
          - type: 'null'
          title: Result
          description: Result returned to the model (gen_ai.tool.call.result). None if the tool errored.
        error:
          anyOf:
          - type: string
          - type: 'null'
          title: Error
          description: Error message if the tool call failed
      type: object
      required:
      - tool_call_id
      - tool_name
      - started_at
      - duration
      - arguments
      title: AgenticToolCall
      description: 'Represents a single tool call made by the agent during an agentic search.


        Fields follow the OpenTelemetry GenAI semantic conventions for tool calls:

        https://opentelemetry.io/docs/specs/semconv/gen-ai/gen-ai-spans/'
    ApiKey:
      properties:
        id:
          type: string
          title: Id
          description: The ID of the API key
        name:
          type: string
          title: Name
          description: The name of the API key
        redacted_value:
          type: string
          title: Redacted Value
          description: The redacted value of the API key
        expires_at:
          anyOf:
          - type: string
            format: date-time
          - type: 'null'
          title: Expires At
          description: The expiration datetime of the API key
        created_at:
          type: string
          format: date-time
          title: Created At
          description: The creation datetime of the API key
        updated_at:
          type: string
          format: date-time
          title: Updated At
          description: The last update datetime of the API key
        last_active_at:
          anyOf:
          - type: string
            format: date-time
          - type: 'null'
          title: Last Active At
          description: The last active datetime of the API key
        object:
          type: string
          const: api_key
          title: Object
          description: The type of the object
          default: api_key
        scope:
          anyOf:
          - items:
              $ref: '#/components/schemas/Scope'
            type: array
          - type: 'null'
          title: Scope
          description: The scope of the API key
      type: object
      required:
      - id
      - name
      - redacted_value
      - created_at
      - updated_at
      title: ApiKey
      description: Response model for an API key.
    ApiKeyCreateOrUpdateParams:
      properties:
        type:
          type: string
          const: api_key
          title: Type
          default: api_key
        api_key:
          type: string
          title: Api Key
          description: The API key
      type: object
      required:
      - api_key
      title: ApiKeyCreateOrUpdateParams
      description: Base class for API key create or update parameters.
    ApiKeyCreateParams:
      properties:
        name:
          type: string
          title: Name
          description: A name/description for the API key
          default: API Key
        scope:
          anyOf:
          - items:
              $ref: '#/components/schemas/Scope'
            type: array
          - type: 'null'
          title: Scope
          description: The scope of the API key
        expires_at:
          anyOf:
          - type: string
            format: date-time
          - type: 'null'
          title: Expires At
          description: Optional expiration datetime
      type: object
      title: ApiKeyCreateParams
      description: Parameters for creating an API key.
    ApiKeyCreated:
      properties:
        id:
          type: string
          title: Id
          description: The ID of the API key
        name:
          type: string
          title: Name
          description: The name of the API key
        redacted_value:
          type: string
          title: Redacted Value
          description: The redacted value of the API key
        expires_at:
          anyOf:
          - type: string
            format: date-time
          - type: 'null'
          title: Expires At
          description: The expiration datetime of the API key
        created_at:
          type: string
          format: date-time
          title: Created At
          description: The creation datetime of the API key
        updated_at:
          type: string
          format: date-time
          title: Updated At
          description: The last update datetime of the API key
        last_active_at:
          anyOf:
          - type: string
            format: date-time
          - type: 'null'
          title: Last Active At
          description: The last active datetime of the API key
        object:
          type: string
          const: api_key
          title: Object
          description: The type of the object
          default: api_key
        scope:
          anyOf:
          - items:
              $ref: '#/components/schemas/Scope'
            type: array
          - type: 'null'
          title: Scope
          description: The scope of the API key
        value:
          type: string
          title: Value
          description: The value of the API key
      type: object
      required:
      - id
      - name
      - redacted_value
      - created_at
      - updated_at
      - value
      title: ApiKeyCreated
      description: Response model for creating an API key.
    ApiKeyDeleted:
      properties:
        id:
          type: string
          title: Id
          description: The ID of the deleted API key
        deleted:
          type: boolean
          title: Deleted
          description: Whether the API key was deleted
        object:
          type: string
          const: api_key
          title: Object
          description: The type of the object deleted
          default: api_key
      type: object
      required:
      - id
      - deleted
      title: ApiKeyDeleted
      description: Response model for deleting an API key.
    ApiKeyListResponse:
      properties:
        pagination:
          $ref: '#/components/schemas/PaginationWithTotal'
        object:
          type: string
          const: list
          title: Object
          description: The object type of the response
          default: list
        data:
          items:
            $ref: '#/components/schemas/ApiKey'
          type: array
          title: Data
          description: The list of API keys
      type: object
      required:
      - pagination
      - data
      title: ApiKeyListResponse
    ApiKeyUpdateParams:
      properties:
        name:
          anyOf:
          - type: string
          - type: 'null'
          title: Name
          description: A name/description for the API key
        expires_at:
          anyOf:
          - type: string
            format: date-time
          - type: 'null'
          title: Expires At
          description: Optional expiration datetime
      type: object
      title: ApiKeyUpdateParams
      description: Parameters for updating an API key.
    AudioChunkGeneratedMetadata:
      properties:
        type:
          type: string
          const: audio
          title: Type
          default: audio
        file_type:
          type: string
          title: File Type
          default: audio/mpeg
        file_size:
          anyOf:
          - type: integer
          - type: 'null'
          title: File Size
        total_duration_seconds:
          anyOf:
          - type: number
          - type: 'null'
          title: Total Duration Seconds
        sample_rate:
          anyOf:
          - type: integer
          - type: 'null'
          title: Sample Rate
        channels:
          anyOf:
          - type: integer
          - type: 'null'
          title: Channels
        audio_format:
          anyOf:
          - type: integer
          - type: 'null'
          title: Audio Format
        bpm:
          anyOf:
          - type: integer
          - type: 'null'
          title: Bpm
        file_extension:
          anyOf:
          - type: string
          - type: 'null'
          title: File Extension
      additionalProperties: true
      type: object
      title: AudioChunkGeneratedMetadata
    AudioUrl:
      properties:
        url:
          type: string
          title: Url
          description: The audio URL. Can be either a URL or a Data URI.
      type: object
      required:
      - url
      title: AudioUrl
      description: Model for audio URL validation.
    AudioUrlInputChunk:
      properties:
        chunk_index:
          type: integer
          title: Chunk Index
          description: position of the chunk in a file
          examples:
          - 0
          - 1
          - 2
          - 3
          - 4
        mime_type:
          type: string
          title: Mime Type
          description: mime type of the chunk
          default: audio/mpeg
          examples:
          - audio/mpeg
        generated_metadata:
          anyOf:
          - oneOf:
            - $ref: '#/components/schemas/MarkdownChunkGeneratedMetadata'
            - $ref: '#/components/schemas/TextChunkGeneratedMetadata'
            - $ref: '#/components/schemas/PDFChunkGeneratedMetadata'
            - $ref: '#/components/schemas/CodeChunkGeneratedMetadata'
            - $ref: '#/components/schemas/AudioChunkGeneratedMetadata'
            - $ref: '#/components/schemas/VideoChunkGeneratedMetadata'
            - $ref: '#/components/schemas/ImageChunkGeneratedMetadata'
            discriminator:
              propertyName: type
              mapping:
                audio: '#/components/schemas/AudioChunkGeneratedMetadata'
                code: '#/components/schemas/CodeChunkGeneratedMetadata'
                image: '#/components/schemas/ImageChunkGeneratedMetadata'
                markdown: '#/components/schemas/MarkdownChunkGeneratedMetadata'
                pdf: '#/components/schemas/PDFChunkGeneratedMetadata'
                text: '#/components/schemas/TextChunkGeneratedMetadata'
                video: '#/components/schemas/VideoChunkGeneratedMetadata'
          - type: 'null'
          title: Generated Metadata
          description: metadata of the chunk
          examples:
          - file_size: 1024
            file_type: text/plain
            language: en
            type: text
            word_count: 100
        model:
          anyOf:
          - type: string
          - type: 'null'
          title: Model
          description: model used for this chunk
          examples:
          - text-embedding-ada-002
          - clip-vit-large-patch14
        type:
          type: string
          const: audio_url
          title: Type
          description: Input type identifier
          default: audio_url
        transcription:
          anyOf:
          - type: string
          - type: 'null'
          title: Transcription
          description: speech recognition (sr) text of the audio
          examples:
          - The year 2025 reports for ..
        summary:
          anyOf:
          - type: string
          - type: 'null'
          title: Summary
          description: summary of the audio
          examples:
          - A financial report audio for 2025
        audio_url:
          anyOf:
          - $ref: '#/components/schemas/AudioUrl'
          - type: 'null'
          description: Audio URL
        sampling_rate:
          type: integer
          title: Sampling Rate
          description: The sampling rate of the audio.
      type: object
      required:
      - chunk_index
      - sampling_rate
      title: AudioUrlInputChunk
    BalanceInfo:
      properties:
        current_balance:
          type: number
          title: Current Balance
          description: The current balance
        next_effective_balance:
          type: number
          title: Next Effective Balance
          description: The next effective balance
        next_effective_date:
          anyOf:
          - type: string
            format: date-time
          - type: 'null'
          title: Next Effective Date
          description: The next effective date
      type: object
      title: BalanceInfo
      description: Information about an organization's credit balance.
    BillingPeriodSummary:
      properties:
        period:
          $ref: '#/components/schemas/Period'
          description: The billing period
        cost:
          $ref: '#/components/schemas/CostInfo'
          description: The cost information
        balance:
          $ref: '#/components/schemas/BalanceInfo'
          description: The balance information
        usages:
          additionalProperties:
            $ref: '#/components/schemas/UsageInfo'
          type: object
          title: Usages
          description: The monthly usages information per metric
        generated_at:
          type: string
          format: date-time
          title: Generated At
          description: The date and time the summary was generated
      type: object
      required:
      - period
      - cost
      - balance
      - usages
      - generated_at
      title: BillingPeriodSummary
      description: High level billing summary for the currently active period.
    Body_create_file:
      properties:
        file:
          type: string
          format: binary
          title: File
          description: The file to upload
      type: object
      required:
      - file
      title: Body_create_file
    Body_update_file:
      properties:
        file:
          type: string
          format: binary
          title: File
          description: The file to update
      type: object
      required:
      - file
      title: Body_update_file
    Body_upload_store_file:
      properties:
        file:
          type: string
          format: binary
          title: File
          description: The file to upload and index
        params:
          anyOf:
          - type: string
          - type: 'null'
          title: Params
      type: object
      required:
      - file
      title: Body_upload_store_file
    Chunk:
      properties:
        content:
          anyOf:
          - type: string
          - type: 'null'
          title: Content
          description: The full content of the chunk
        content_to_embed:
          type: string
          title: Content To Embed
          description: The content of the chunk to embed
        elements:
          items:
            $ref: '#/components/schemas/ChunkElement'
          type: array
          title: Elements
          description: List of elements contained in this chunk
      type: object
      required:
      - content_to_embed
      - elements
      title: Chunk
      description: A chunk of text extracted from a document page.
    ChunkElement:
      properties:
        type:
          $ref: '#/components/schemas/ElementType'
          description: The type of the extracted element
        confidence:
          type: number
          maximum: 1.0
          minimum: 0.0
          title: Confidence
          description: The confidence score of the extraction
        bbox:
          prefixItems:
          - type: number
          - type: number
          - type: number
          - type: number
          type: array
          maxItems: 4
          minItems: 4
          title: Bbox
          description: The bounding box coordinates [x1, y1, x2, y2]
        page:
          type: integer
          minimum: 0.0
          title: Page
          description: The page number where the element was found
        content:
          type: string
          title: Content
          description: The extracted text content of the element
        summary:
          anyOf:
          - type: string
          - type: 'null'
          title: Summary
          description: A brief summary of the element's content
        image:
          anyOf:
          - type: string
          - type: 'null'
          title: Image
          description: The base64-encoded image data for figure elements
      type: object
      required:
      - type
      - confidence
      - bbox
      - page
      - content
      title: ChunkElement
      description: Represents an extracted element from a document with its content and metadata.
    ChunkSearchResultRule:
      properties:
        query:
          type: string
          title: Query
          description: The query to trigger the rule
        store_id:
          type: string
          title: Store Id
          description: The store identifier to apply the rule to
        type:
          type: string
          const: chunk_search_result
          title: Type
          description: The type of substitution
        file_id:
          type: string
          title: File Id
          description: The file ID of the chunk to substitute
        chunk_index:
          type: integer
          minimum: 0.0
          title: Chunk Index
          description: The index of the chunk to substitute
        result_index:
          type: integer
          minimum: 0.0
          title: Result Index
          description: The index where the result will be inserted
      type: object
      required:
      - query
      - store_id
      - type
      - file_id
      - chunk_index
      - result_index
      title: ChunkSearchResultRule
      description: Represents a chunk search result rule for a vector store search.
    ChunkingStrategy:
      type: string
      enum:
      - page
      title: ChunkingStrategy
      description: Strategy used for chunking document content.
    CodeChunkGeneratedMetadata:
      properties:
        type:
          type: string
          const: code
          title: Type
          default: code
        file_type:
          type: string
          title: File Type
        language:
          anyOf:
          - type: string
          - type: 'null'
          title: Language
        word_count:
          anyOf:
          - type: integer
          - type: 'null'
          title: Word Count
        file_size:
          anyOf:
          - type: integer
          - type: 'null'
          title: File Size
        start_line:
          type: integer
          title: Start Line
          default: 0
        num_lines:
          type: integer
          title: Num Lines
          default: 0
        file_extension:
          anyOf:
          - type: string
          - type: 'null'
          title: File Extension
      additionalProperties: true
      type: object
      required:
      - file_type
      title: CodeChunkGeneratedMetadata
    CompleteMultipartUploadRequest:
      properties:
        parts:
          items:
            $ref: '#/components/schemas/MultipartUploadPart'
          type: array
          minItems: 1
          title: Parts
          description: List of completed parts with their ETags
      type: object
      required:
      - parts
      title: CompleteMultipartUploadRequest
    ConditionOperator:
      type: string
      enum:
      - eq
      - not_eq
      - gt
      - gte
      - lt
      - lte
      - in
      - not_in
      - like
      - starts_with
      - not_like
      - regex
      title: ConditionOperator
      description: Operator for a filter condition.
    ConnectorListResponse:
      properties:
        pagination:
          $ref: '#/components/schemas/CursorPaginationResponse'
        data:
          items:
            $ref: '#/components/schemas/DataSourceConnector'
          type: array
          title: Data
          description: The list of connectors
        object:
          type: string
          const: list
          title: Object
          description: The object type of the response
          default: list
      type: object
      required:
      - pagination
      - data
      title: ConnectorListResponse
      description: A list of connectors with pagination.
    ContextualizationConfig:
      properties:
        with_metadata:
          anyOf:
          - type: boolean
          - items:
              type: string
            type: array
          title: With Metadata
          description: Include all metadata or specific fields in the contextualization. Supports dot notation for nested
            fields (e.g., 'author.name'). When True, all metadata is included (flattened). When a list, only specified fields
            are included.
          default: false
          examples:
          - true
          - false
          - - title
            - author.name
            - author.email
            - tags
        with_file_context:
          type: boolean
          title: With File Context
          description: Use an LLM to generate a short context for each text chunk that situates it within the full document,
            improving retrieval accuracy. Only applies to text content during non-sliced ingestion.
          default: false
      type: object
      title: ContextualizationConfig
    CostHistogramResponse:
      properties:
        data:
          items:
            $ref: '#/components/schemas/DailyCostBucket'
          type: array
          title: Data
          description: The histogram of cost information
        object:
          type: string
          const: cost.histogram
          title: Object
          description: The object type of the response
          default: cost.histogram
      type: object
      required:
      - data
      title: CostHistogramResponse
    CostInfo:
      properties:
        net_usage_cost:
          type: string
          pattern: ^(?!^[-+.]*$)[+-]?0*\d*\.?\d*$
          title: Net Usage Cost
          description: The net usage cost
          default: '0'
        gross_usage_cost:
          type: string
          pattern: ^(?!^[-+.]*$)[+-]?0*\d*\.?\d*$
          title: Gross Usage Cost
          description: The gross usage cost
          default: '0'
        balance_applied:
          type: string
          pattern: ^(?!^[-+.]*$)[+-]?0*\d*\.?\d*$
          title: Balance Applied
          description: The balance applied
          default: '0'
        phases:
          items:
            $ref: '#/components/schemas/PhaseCostInfo'
          type: array
          title: Phases
          description: The cost for each phase in descending order of end date
          default: []
        products:
          items:
            $ref: '#/components/schemas/ProductCostInfo'
          type: array
          title: Products
          description: The cost for each product. Store, Parsing, Reranking, Embeddings
          default: []
      type: object
      title: CostInfo
      description: "Cost information for a billing period.\n\n- net_usage_cost: portion of usage that actually ends up on\
        \ the invoice after credits,\n    computed as gross_usage_cost - balance_applied.\n- gross_usage_cost: metered usage\
        \ value before balance applied."
    CreateMultipartUploadRequest:
      properties:
        filename:
          type: string
          minLength: 1
          title: Filename
          description: Name of the file including extension
          examples:
          - document.pdf
        file_size:
          type: integer
          exclusiveMinimum: 0.0
          title: File Size
          description: Total size of the file in bytes
          examples:
          - 10485760
        mime_type:
          type: string
          pattern: ^[\w\.\-\+]+/[\w\.\-\+]+(\.\w+)*$
          title: Mime Type
          description: MIME type of the file
          examples:
          - application/pdf
        part_count:
          type: integer
          maximum: 10000.0
          minimum: 1.0
          title: Part Count
          description: Number of parts to split the upload into
          default: 1
          examples:
          - 3
      type: object
      required:
      - filename
      - file_size
      - mime_type
      title: CreateMultipartUploadRequest
    CreateMultipartUploadResponse:
      properties:
        id:
          type: string
          title: Id
          description: The multipart upload ID (use this to complete or abort)
        part_urls:
          items:
            $ref: '#/components/schemas/MultipartUploadPartUrl'
          type: array
          title: Part Urls
          description: Presigned URLs for uploading parts
      type: object
      required:
      - id
      - part_urls
      title: CreateMultipartUploadResponse
    CreatedJsonSchema:
      properties:
        json_schema:
          additionalProperties: true
          type: object
          title: Json Schema
          description: The created JSON schema
      type: object
      required:
      - json_schema
      title: CreatedJsonSchema
      description: Result of creating a JSON schema.
    CursorPaginationResponse:
      properties:
        has_more:
          type: boolean
          title: Has More
          description: 'Contextual direction-aware flag: True if more items exist in the requested pagination direction. For
            ''after'': more items after this page. For ''before'': more items before this page.'
          examples:
          - true
          - false
        first_cursor:
          anyOf:
          - type: string
          - type: 'null'
          title: First Cursor
          description: Cursor of the first item in this page. Use for backward pagination. None if page is empty.
          examples:
          - eyJjcmVhdGVkX2F0IjoiMjAyNC0xMi0zMVQyMzo1OTo1OS4wMDBaIiwiaWQiOiJhYmMxMjMifQ==
          - null
        last_cursor:
          anyOf:
          - type: string
          - type: 'null'
          title: Last Cursor
          description: Cursor of the last item in this page. Use for forward pagination. None if page is empty.
          examples:
          - eyJjcmVhdGVkX2F0IjoiMjAyNC0xMi0zMFQyMzo1OTo1OS4wMDBaIiwiaWQiOiJ4eXo3ODkifQ==
          - null
        total:
          anyOf:
          - type: integer
          - type: 'null'
          title: Total
          description: Total number of items available across all pages. Only included when include_total=true was requested.
            Expensive operation - use sparingly.
          examples:
          - 42
          - 0
          - null
      type: object
      required:
      - has_more
      - first_cursor
      - last_cursor
      title: CursorPaginationResponse
      desc

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# Full source: https://raw.githubusercontent.com/api-evangelist/mixedbread-ai/refs/heads/main/openapi/mixedbread-billing-api-openapi.yml