> ## Documentation Index
> Fetch the complete documentation index at: https://www.truefoundry.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Count Tokens

> Counts the tokens a message would consume against the chosen model, in the Anthropic Messages format.



## OpenAPI

````yaml /gateway-openapi.json post /messages/count_tokens
openapi: 3.0.0
info:
  title: LLM Gateway
  description: API for LLM Gateway
  version: 1.0.0
servers:
  - url: https://{gatewayBaseURL}
    variables:
      gatewayBaseURL:
        default: gateway.truefoundry.ai
        description: Gateway base URL
    description: Gateway base URL
security:
  - AuthorizationBearer: []
tags:
  - name: Chat
  - name: Agent
  - name: Messages
  - name: MCP
  - name: Embeddings
  - name: Rerank
  - name: Responses
  - name: Image
  - name: Audio
  - name: Batch
  - name: Files
  - name: Fine-tuning
  - name: Moderations
  - name: Models
paths:
  /messages/count_tokens:
    post:
      tags:
        - Messages
      summary: Count Tokens
      description: >-
        Counts the tokens a message would consume against the chosen model, in
        the Anthropic Messages format.
      parameters:
        - schema:
            type: string
            description: Optional metadata for the request
          required: false
          name: x-tfy-metadata
          in: header
        - schema:
            type: string
            description: Name of the provider
          required: false
          name: x-tfy-provider-name
          in: header
      requestBody:
        required: true
        description: Parameters for counting tokens.
        content:
          application/json:
            schema: {}
      responses:
        '200':
          description: Token count returned successfully.
          content:
            application/json:
              schema: {}
        '400':
          description: Bad request.
components:
  securitySchemes:
    AuthorizationBearer:
      type: http
      scheme: bearer
      bearerFormat: JWT

````