> ## Documentation Index > Fetch the complete documentation index at: https://docs.abliteration.ai/llms.txt > Use this file to discover all available pages before exploring further. # Count Anthropic Messages input tokens ## OpenAPI ````yaml https://api.abliteration.ai/openapi.json post /v1/messages/count_tokens openapi: 3.1.0 info: title: Abliteration Platform API summary: Greenfield Abliteration backend and API gateway. version: 0.1.0 servers: [] security: [] paths: /v1/messages/count_tokens: post: tags: - Messages summary: Count Anthropic Messages input tokens operationId: countMessageTokens parameters: - name: Authorization in: header required: false schema: anyOf: - type: string - type: 'null' description: Bearer API key. title: Authorization description: Bearer API key. - name: x-api-key in: header required: false schema: anyOf: - type: string - type: 'null' description: >- API key alternative for Anthropic-compatible clients. Authorization takes precedence when both headers are present. title: X-Api-Key description: >- API key alternative for Anthropic-compatible clients. Authorization takes precedence when both headers are present. requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/AnthropicCountTokensRequest' description: Anthropic Messages count-tokens-compatible request. responses: '200': description: Successful Response content: application/json: schema: $ref: '#/components/schemas/AnthropicCountTokensResponse' '400': content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' description: Bad Request '401': content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' description: Unauthorized '403': content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' description: Forbidden '404': content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' description: Not Found '409': content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' description: Conflict '413': content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' description: Request Entity Too Large '415': content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' description: Unsupported Media Type '422': description: Validation Error content: application/json: schema: $ref: '#/components/schemas/HTTPValidationError' '429': content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' description: Too Many Requests '500': content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' description: Internal Server Error '502': content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' description: Bad Gateway '503': content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' description: Service Unavailable components: schemas: AnthropicCountTokensRequest: properties: model: type: string minLength: 1 title: Model messages: items: $ref: '#/components/schemas/AnthropicMessage' type: array minItems: 1 title: Messages system: anyOf: - type: string - items: additionalProperties: true type: object type: array - type: 'null' title: System tools: anyOf: - items: additionalProperties: true type: object type: array - type: 'null' title: Tools tool_choice: anyOf: - $ref: '#/components/schemas/AnthropicToolChoice' - type: 'null' thinking: anyOf: - $ref: '#/components/schemas/AnthropicThinking' - type: 'null' output_config: anyOf: - $ref: '#/components/schemas/AnthropicOutputConfig' - type: 'null' context_management: anyOf: - $ref: '#/components/schemas/AnthropicContextManagement' - type: 'null' additionalProperties: false type: object required: - model - messages title: AnthropicCountTokensRequest description: Count request mirrors model-visible Messages inputs without generation. AnthropicCountTokensResponse: properties: input_tokens: type: integer minimum: 0 title: Input Tokens additionalProperties: true type: object required: - input_tokens title: AnthropicCountTokensResponse ErrorResponse: properties: error: $ref: '#/components/schemas/ErrorDetail' type: object required: - error title: ErrorResponse HTTPValidationError: properties: detail: items: $ref: '#/components/schemas/ValidationError' type: array title: Detail type: object title: HTTPValidationError AnthropicMessage: properties: role: type: string enum: - user - assistant - system title: Role content: anyOf: - type: string - items: additionalProperties: true type: object type: array title: Content additionalProperties: false type: object required: - role - content title: AnthropicMessage AnthropicToolChoice: properties: type: type: string enum: - auto - any - tool - none title: Type name: anyOf: - type: string - type: 'null' title: Name disable_parallel_tool_use: anyOf: - type: boolean - type: 'null' title: Disable Parallel Tool Use additionalProperties: false type: object required: - type title: AnthropicToolChoice AnthropicThinking: properties: type: type: string enum: - enabled - disabled - adaptive title: Type budget_tokens: anyOf: - type: integer maximum: 999990 minimum: 1 - type: 'null' title: Budget Tokens display: anyOf: - type: string enum: - summarized - omitted - type: 'null' title: Display additionalProperties: false type: object required: - type title: AnthropicThinking AnthropicOutputConfig: properties: effort: anyOf: - type: string enum: - low - medium - high - xhigh - max - ultracode - type: 'null' title: Effort format: anyOf: - $ref: '#/components/schemas/AnthropicJsonOutputFormat' - type: 'null' additionalProperties: false type: object title: AnthropicOutputConfig AnthropicContextManagement: properties: edits: items: $ref: '#/components/schemas/AnthropicClearThinkingContextEdit' type: array maxItems: 1 minItems: 1 title: Edits additionalProperties: false type: object required: - edits title: AnthropicContextManagement description: |- Supported beta context-management subset. ``keep=all`` does not remove any replayed thinking blocks, so it can be safely consumed at the compatibility boundary and omitted from the vLLM provider payload. ErrorDetail: properties: code: type: string title: Code description: Stable machine-readable error code. message: type: string title: Message description: Bounded human-readable error message. type: $ref: '#/components/schemas/ErrorType' description: Broad stable error category. param: anyOf: - type: string - type: 'null' title: Param description: Request field related to the error. request_id: type: string title: Request Id description: Server-owned canonical request ID. doc_url: anyOf: - type: string - type: 'null' title: Doc Url description: Documentation URL for the error. type: object required: - code - message - type - request_id title: ErrorDetail ValidationError: properties: loc: items: anyOf: - type: string - type: integer type: array title: Location msg: type: string title: Message type: type: string title: Error Type input: title: Input ctx: type: object title: Context type: object required: - loc - msg - type title: ValidationError AnthropicJsonOutputFormat: properties: type: type: string const: json_schema title: Type schema: additionalProperties: true type: object title: Schema additionalProperties: false type: object required: - type - schema title: AnthropicJsonOutputFormat AnthropicClearThinkingContextEdit: properties: type: type: string const: clear_thinking_20251015 title: Type keep: type: string const: all title: Keep additionalProperties: false type: object required: - type - keep title: AnthropicClearThinkingContextEdit description: Claude Code's non-destructive context-management compatibility edit. ErrorType: type: string enum: - auth_error - permission_error - validation_error - rate_limit_error - billing_error - moderation_error - media_error - not_found_error - conflict_error - provider_error - internal_error title: ErrorType ````