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

# Get senior tranche exchange rate

> **Available on development API only.**

Retrieve the current exchange rate for a senior tranche token. Returns the rate to the underlying stablecoin and to USDC.



## OpenAPI

````yaml /api-reference/openapi.json get /tranches/senior/{id}/exchange-rate
openapi: 3.0.3
info:
  title: Reflect API
  description: >-
    Interact with the Reflect infrastructure via API. Retrieve stablecoin and
    protocol stats. Generate transactions for minting and redeeming stablecoins.
    Manage integrations and issue whitelabel stablecoins.


    ## Rate Limiting

    - **Unauthenticated users**: 100 requests per minute

    - **Authenticated integrators**: 500 requests per minute


    ## Authentication

    To access higher rate limits, include your API key in the `X-API-Key`
    header. API keys can be obtained through the integration management
    endpoints.
  version: 1.0.0
  contact:
    name: Reflect
    url: https://reflect.money
servers:
  - url: https://prod.api.reflect.money
    description: Production environment
  - url: https://dev.api.reflect.money
    description: Development environment (includes /tranches endpoints)
security: []
tags:
  - name: Health
    description: Health check endpoints
  - name: Stablecoin
    description: Reflect stablecoins interaction endpoints.
  - name: Integration
    description: Custom integration management endpoints.
  - name: Stats
    description: Protocol statistics endpoints
  - name: Events
    description: Protocol events endpoints
  - name: Tranches - Senior
    description: >-
      Senior tranche endpoints (development API only). Deposit and redeem
      underlying stablecoins, query tranche statistics and exchange rates.
  - name: Tranches - Junior
    description: >-
      Junior tranche endpoints (development API only). Deposit and withdraw
      assets, manage cooldowns, query tranche statistics and exchange rates.
  - name: Tranches
    description: General tranche endpoints (development API only).
paths:
  /tranches/senior/{id}/exchange-rate:
    get:
      tags:
        - Tranches - Senior
      summary: Get senior tranche exchange rate
      description: >-
        **Available on development API only.**


        Retrieve the current exchange rate for a senior tranche token. Returns
        the rate to the underlying stablecoin and to USDC.
      parameters:
        - name: id
          in: path
          description: Senior tranche ID (proxy state PDA address)
          required: true
          schema:
            type: string
        - name: cluster
          in: query
          description: Solana cluster to use (defaults to mainnet)
          required: false
          schema:
            type: string
            enum:
              - mainnet
              - devnet
            default: mainnet
      responses:
        '200':
          description: Exchange rate retrieved successfully
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ExchangeRateResponse'
        '400':
          description: Invalid Senior tranche ID
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/BadRequestErrorResponse'
        '500':
          description: Internal server error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/InternalServerErrorResponse'
components:
  schemas:
    ExchangeRateResponse:
      allOf:
        - $ref: '#/components/schemas/BaseResponse'
        - type: object
          properties:
            data:
              type: object
              properties:
                id:
                  type: string
                  description: Integration or pool ID
                  example: int_12345
                underlying:
                  type: string
                  description: Underlying stablecoin address
                  example: EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v
                rateToUnderlying:
                  type: number
                  description: Rate of integration stablecoin to underlying stablecoin
                  example: 1.000321
                rateToUsdc:
                  type: number
                  description: Rate of integration stablecoin to USDC
                  example: 1
                timestamp:
                  type: string
                  format: date-time
                  description: Timestamp when the exchange rate was retrieved
                  example: '2024-01-01T00:00:00.000Z'
              required:
                - id
                - underlying
                - rateToUnderlying
                - rateToUsdc
                - timestamp
          required:
            - data
    BadRequestErrorResponse:
      type: object
      properties:
        success:
          type: boolean
          description: Whether the request was successful
          example: false
        message:
          type: string
          description: Error message describing what went wrong with the request
          example: 'Invalid request data: depositAmount must be positive'
      required:
        - success
        - message
    InternalServerErrorResponse:
      type: object
      properties:
        success:
          type: boolean
          description: Whether the request was successful
          example: false
        message:
          type: string
          description: Error message describing the server error
          example: Internal server error
      required:
        - success
        - message
    BaseResponse:
      type: object
      properties:
        success:
          type: boolean
          description: Whether the request was successful
      required:
        - success

````

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