Idle Finance Rates API

openapi: 3.2.0
info:
  title: Idle Finance Rates API
  description: The Idle Finance REST API provides programmatic access to Best Yield and Yield Tranches vault pools, total value locked (TVL) metrics, historical yield rates for underlying token addresses, and protocol-level data across supported networks (Ethereum, Polygon zkEVM, Optimism). Authentication is via Bearer token obtained by request.
  version: 1.0.0
  contact:
    name: Idle Finance Developer Access
    url: https://idlefinance.typeform.com/to/CzRkDH
  termsOfService: https://idle.finance/terms
  license:
    name: Proprietary
    url: https://idle.finance/terms
servers:
- url: https://api.idle.finance
  description: Ethereum mainnet endpoint
- url: https://api-zkevm.idle.finance
  description: Polygon zkEVM endpoint
- url: https://api-optimism.idle.finance
  description: Optimism endpoint
security:
- BearerAuth: []
tags:
- name: Rates
  description: Historical daily yield rate data for Best Yield vaults
paths:
  /rates/{address}:
    get:
      operationId: getRatesByAddress
      summary: Get historical rates for an underlying token
      description: Provides historical daily APY/rate data for Best Yield vaults filtered by the underlying token address and an optional calendar range.
      tags:
      - Rates
      security:
      - BearerAuth: []
      parameters:
      - name: address
        in: path
        required: true
        description: Underlying token contract address (e.g. DAI, USDC, USDT, WETH on Ethereum).
        schema:
          type: string
          pattern: ^0x[a-fA-F0-9]{40}$
        example: '0x6B175474E89094C44Da98b954EedeAC495271d0F'
      - name: start
        in: query
        required: false
        description: Unix timestamp to filter results from (inclusive).
        schema:
          type: integer
          format: int64
        example: 1672531200
      - name: end
        in: query
        required: false
        description: Unix timestamp to filter results to (inclusive).
        schema:
          type: integer
          format: int64
        example: 1704067200
      - name: isRisk
        in: query
        required: false
        description: Filter by strategy risk type. true returns risk-adjusted strategy data, false returns the default Best Yield strategy data.
        schema:
          type: boolean
        example: false
      - name: frequency
        in: query
        required: false
        description: Number of seconds between data records. Defaults to 86400 (one day).
        schema:
          type: integer
          default: 86400
        example: 86400
      - name: order
        in: query
        required: false
        description: Sort order for results.
        schema:
          type: string
          enum:
          - asc
          - desc
          default: asc
        example: asc
      - name: limit
        in: query
        required: false
        description: Maximum number of records to return.
        schema:
          type: integer
          minimum: 1
        example: 30
      responses:
        '200':
          description: Array of historical rate records
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/RateRecord'
        '400':
          description: Bad Request — invalid address or query parameters
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '401':
          description: Unauthorized — missing or invalid Bearer token
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '502':
          description: Bad Gateway
components:
  schemas:
    RateRecord:
      type: object
      description: Historical daily APY/rate record for a Best Yield vault.
      properties:
        timestamp:
          type: integer
          format: int64
          description: Unix timestamp of the record.
          example: 1704067200
        date:
          type: string
          format: date
          description: ISO 8601 date string corresponding to the record.
          example: '2024-01-01'
        apy:
          type: string
          description: Annualised percentage yield at the given timestamp.
          example: '4.12'
        tvl:
          type: string
          description: Total value locked at the given timestamp (USD).
          example: '5001234.00'
      required:
      - timestamp
      - apy
    Error:
      type: object
      description: Standard error response.
      properties:
        error:
          type: string
          description: Short error code or message.
          example: Unauthorized
        message:
          type: string
          description: Detailed error description.
          example: A valid Bearer token is required.
      required:
      - error
  securitySchemes:
    BearerAuth:
      type: http
      scheme: bearer
      description: 'Bearer token obtained via https://idlefinance.typeform.com/to/CzRkDH. Include as "Authorization: Bearer <token>" on all requests.'
externalDocs:
  description: Idle Finance Developer Documentation
  url: https://docs.idle.finance/developers/api