> ## Documentation Index > Fetch the complete documentation index at: https://docs.portkey.ai/docs/llms.txt > Use this file to discover all available pages before exploring further. # Count message tokens ## OpenAPI ````yaml https://raw.githubusercontent.com/PaloAltoNetworks/openapi/refs/heads/main/openapi.yaml post /messages/count_tokens openapi: 3.0.0 info: title: Prisma AIRS AI Gateway API version: 3.0.0 description: '' servers: - url: https://aigw.portkey.ai/v1 description: Managed - url: https://self-hosted-gateway-url.example.com/v1 description: Self-hosted -- replace with your own gateway host security: - Authorization: [] tags: - name: Assistants description: '' - name: Audio description: '' - name: Batch description: '' - name: Chat description: '' - name: Completions description: '' - name: Decisions description: '' - name: Embeddings description: '' - name: Files description: '' - name: Fine-Tuning description: '' - name: Images description: '' - name: Messages description: '' - name: Model Pricing description: '' - name: Models description: '' - name: Moderations description: '' - name: OCR description: '' - name: Realtime description: '' - name: Rerank description: '' - name: Responses description: '' - name: Vector Stores description: '' - name: Configs description: '' - name: Guardrails description: '' - name: Integrations description: '' - name: Integrations > Models description: '' - name: Integrations > Workspaces description: '' - name: Providers description: '' - name: Secret References description: '' - name: MCP Integrations description: '' - name: MCP Integrations > Capabilities description: '' - name: MCP Integrations > Metadata description: '' - name: MCP Integrations > Workspaces description: '' - name: MCP Servers description: '' - name: MCP Servers > Capabilities description: '' - name: MCP Servers > Connections description: '' - name: MCP Servers > User Access description: '' - name: API Keys description: '' - name: Access Policies description: '' - name: Deployments description: '' - name: Egress Allowlist description: '' - name: Org Guardrails description: '' - name: Rate Limit Policies description: '' - name: Usage Limit Policies description: '' - name: Workspaces description: '' - name: Analytics > Graphs description: '' - name: Analytics > Groups description: '' - name: Analytics > Summary description: '' - name: Feedback description: '' - name: Logs description: '' paths: /messages/count_tokens: post: tags: - Messages operationId: countMessageTokens parameters: - $ref: '#/components/parameters/PortkeyTraceId' - $ref: '#/components/parameters/PortkeySpanId' - $ref: '#/components/parameters/PortkeyParentSpanId' - $ref: '#/components/parameters/PortkeySpanName' - $ref: '#/components/parameters/PortkeyMetadata' requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/CountMessageTokensRequest' responses: '200': description: '' content: application/json: schema: $ref: '#/components/schemas/CountMessageTokensResponse' components: parameters: PortkeyTraceId: in: header name: x-portkey-trace-id schema: type: string required: false PortkeySpanId: in: header name: x-portkey-span-id schema: type: string required: false PortkeyParentSpanId: in: header name: x-portkey-parent-span-id schema: type: string required: false PortkeySpanName: in: header name: x-portkey-span-name schema: type: string required: false PortkeyMetadata: in: header name: x-portkey-metadata schema: type: object required: false schemas: CountMessageTokensRequest: type: object required: - model - messages description: '' properties: model: description: '' type: string messages: type: array items: $ref: '#/components/schemas/AnthropicMessage' system: $ref: '#/components/schemas/AnthropicSystemContent' tools: type: array items: $ref: '#/components/schemas/AnthropicTool' tool_choice: type: object properties: type: type: string enum: - auto - any - tool - none name: type: string thinking: $ref: '#/components/schemas/AnthropicThinkingConfig' CountMessageTokensResponse: type: object properties: input_tokens: type: integer description: '' AnthropicMessage: type: object required: - role - content properties: role: type: string enum: - user - assistant content: oneOf: - type: string - type: array items: $ref: '#/components/schemas/AnthropicContentBlock' AnthropicSystemContent: oneOf: - description: '' type: string - type: array items: type: object required: - type - text properties: type: type: string enum: - text text: type: string cache_control: type: object properties: type: type: string enum: - ephemeral AnthropicTool: type: object required: - name - input_schema properties: name: type: string description: type: string input_schema: type: object description: '' cache_control: type: object properties: type: type: string enum: - ephemeral AnthropicThinkingConfig: type: object required: - type properties: type: type: string enum: - enabled - disabled - adaptive budget_tokens: type: integer description: '' AnthropicContentBlock: oneOf: - $ref: '#/components/schemas/AnthropicTextContent' - $ref: '#/components/schemas/AnthropicImageContent' - $ref: '#/components/schemas/AnthropicDocumentContent' - $ref: '#/components/schemas/AnthropicToolUseContent' - $ref: '#/components/schemas/AnthropicToolResultContent' - $ref: '#/components/schemas/AnthropicThinkingContent' - $ref: '#/components/schemas/AnthropicRedactedThinkingContent' AnthropicTextContent: type: object required: - type - text properties: type: type: string enum: - text text: type: string AnthropicImageContent: type: object required: - type - source properties: type: type: string enum: - image source: $ref: '#/components/schemas/AnthropicImageSource' AnthropicDocumentContent: type: object required: - type - source properties: type: type: string enum: - document source: $ref: '#/components/schemas/AnthropicDocumentSource' title: type: string context: type: string citations: type: object properties: enabled: type: boolean AnthropicToolUseContent: type: object required: - type - id - name - input properties: type: type: string enum: - tool_use id: type: string name: type: string input: type: object AnthropicToolResultContent: type: object required: - type - tool_use_id properties: type: type: string enum: - tool_result tool_use_id: type: string content: oneOf: - type: string - type: array items: oneOf: - $ref: '#/components/schemas/AnthropicTextContent' - $ref: '#/components/schemas/AnthropicImageContent' is_error: type: boolean AnthropicThinkingContent: type: object required: - type - thinking - signature properties: type: type: string enum: - thinking thinking: type: string signature: type: string AnthropicRedactedThinkingContent: type: object required: - type - data properties: type: type: string enum: - redacted_thinking data: type: string AnthropicImageSource: type: object required: - type properties: type: type: string enum: - base64 - url media_type: type: string enum: - image/jpeg - image/png - image/gif - image/webp description: '' data: description: '' type: string url: description: '' type: string AnthropicDocumentSource: type: object required: - type properties: type: type: string enum: - base64 - url - text - content media_type: type: string enum: - application/pdf - text/plain description: '' data: description: '' type: string url: description: '' type: string text: description: '' type: string securitySchemes: Authorization: type: http scheme: bearer ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.