Euler Finance Prices API

openapi: 3.1.0
info:
  title: Euler Data API (V3) Accounts Prices API
  version: 3.0.0
  description: "API specification for Euler Data v3. This spec defines the current\nresource-oriented contract for the platform, with emphasis on consistent\nschemas, predictable REST semantics, caching, observability, and a uniform\ndeveloper experience.\n\nMigration notes\n- Euler Data v3 is not a path-for-path clone of v1/v2. Some endpoints map\n  directly, some require multiple v3 calls, and some legacy aggregates were\n  intentionally removed.\n- The live [migration guide](/v3/docs/migration) explains how legacy v1/v2\n  endpoints and payloads map into the v3 resource model.\n- Important semantic changes:\n  - Vault base APY and rewards APY are exposed separately in v3.\n  - Account positions are flattened into account-vault rows instead of the\n    legacy nested sub-account shape.\n  - All supported API paths live under `/v3`; legacy paths return `410`.\n  - Summary endpoints prefer smaller, focused resources over large\n    BFF-style payloads.\n\nBase path: /v3\n\nConventions\n- JSON field naming: camelCase\n- Addresses: accept lowercase or checksum; responses are EIP-55 checksummed\n- Public APY values (`*Apy`, `apy*`): percent numbers with 6 decimal places (e.g., 5.123456 = 5.123456%)\n- Contract interest-rate fields (`borrowAPY`, `supplyAPY` in `interestRates`): decimal strings in contract fraction units\n- Ratios (utilization, LTV, etc.): numbers with 6 decimal places\n- Response timestamps: ISO-8601 strings (UTC). Some legacy fields still expose unix\n  seconds for compatibility and include `*Iso` companions.\n- Query time ranges: unix seconds (from/to)\n\nUnit policy\n- v3 separates market metadata from contract verdicts by both name and type.\n- Market-normalized USD prices and USD values are JSON numbers. These are values\n  derived from off-chain pricing, cached price snapshots, or API-level market math.\n  This includes `/v3/prices`, token price routes, vault/earn/protocol USD totals,\n  portfolio market values, portfolio USD liquidation/risk fields such as\n  `liabilityValueUsd`, `totalCollateralValueUsd`, `borrowLiquidationPriceUsd`,\n  and `collateralLiquidationPricesUsd`, and vault holder `assetsUsd`.\n- Contract-derived oracle and raw account-liquidity verdict values are exact strings.\n  These preserve the integer value used by contracts, normalized to 18 decimals\n  for API exposure. Oracle prices are quoted in the vault unit of account, which\n  can be USD, ETH, or another asset. This includes `/v3/oracles/prices`, raw\n  account-liquidity `liabilityValue` and `totalCollateralValue` objects,\n  `liabilityValueBorrowing`, `liabilityValueLiquidation`, and collateral verdict\n  values.\n- On-chain token quantities are bigint strings in their native unit scale. This\n  includes amounts, balances, shares, assets, borrows, reward amounts, liquidation\n  repay/yield amounts, and block numbers.\n- Caps are also bigint strings, but EVK caps are exposed as resolved underlying\n  asset-unit amounts rather than packed contract config words.\n- LTV config values use canonical basis-point strings. Legacy decimal aliases\n  may remain on config-history payloads for compatibility when explicitly named.\n\nRate limiting\n- Optional API keys for higher limits\n- Default limits are configurable; current defaults: free tier 100 req/min (IP-based)\n  and authenticated 1000 req/min (per API key), 60s window.\n- By default, proxy headers are not trusted for IP identity unless explicitly enabled.\n- Redis failures default to fail-closed (503) for strict enforcement; fail-open is opt-in.\n- RateLimit-* (IETF draft-6) and legacy X-RateLimit-* headers are returned.\n\nCORS\n- Public API responses use wildcard CORS, including preflight responses for unsafe methods.\n- Unsafe methods with request bodies must use a JSON media type.\n\nCaching\n- Cache-Control headers are returned for cacheable endpoints.\n- Defaults (may be adjusted in config):\n  - Prices: 300s\n  - APYs: 600s\n  - Rewards: 900s\n  - General responses: 60s (short 30s, long 300s)\n\nErrors\n- All errors use a standard envelope: { error: { code, message, requestId, details? } }\n- Domain error codes are documented in this spec.\n- JSON request bodies must use `Content-Type: application/json` or another `application/*+json` media type.\n- Request bodies larger than 1 MiB are rejected before route parsing with `413 PAYLOAD_TOO_LARGE`.\n"
servers:
- url: /
  description: Current environment
security: []
tags:
- name: Prices
  description: Current and historical token prices. Prices follow v3 source priority rules and return the canonical merged value rather than exposing raw provider-specific reads by default.
paths:
  /v3/tokens/{chainId}/{address}/price:
    get:
      tags:
      - Prices
      summary: Token price
      x-status: implemented
      x-cache-ttl: 300
      parameters:
      - $ref: '#/components/parameters/ChainIdPath'
      - $ref: '#/components/parameters/AddressPath'
      responses:
        '200':
          description: Token price
          headers:
            Cache-Control:
              $ref: '#/components/headers/Cache-Control'
            X-Request-Id:
              $ref: '#/components/headers/X-Request-Id'
          content:
            application/json:
              schema:
                type: object
                properties:
                  data:
                    $ref: '#/components/schemas/Price'
                  meta:
                    type: object
                    properties:
                      timestamp:
                        type: string
                        format: date-time
        '400':
          $ref: '#/components/responses/Error400'
        '404':
          $ref: '#/components/responses/Error404'
        '429':
          $ref: '#/components/responses/Error429'
        '500':
          $ref: '#/components/responses/Error500'
      operationId: getTokensByChainIdByAddressPrice
  /v3/prices:
    get:
      tags:
      - Prices
      summary: Batch prices for tokens
      x-status: implemented
      x-cache-ttl: 300
      parameters:
      - $ref: '#/components/parameters/ChainIdParam'
      - name: addresses
        in: query
        required: false
        schema:
          type: string
        description: Comma-separated token addresses (max 100).
      - name: assets
        in: query
        required: false
        deprecated: true
        schema:
          type: string
        description: Deprecated alias for `addresses`.
      responses:
        '200':
          description: Prices
          headers:
            Cache-Control:
              $ref: '#/components/headers/Cache-Control'
            X-Request-Id:
              $ref: '#/components/headers/X-Request-Id'
          content:
            application/json:
              schema:
                type: object
                properties:
                  data:
                    type: array
                    items:
                      $ref: '#/components/schemas/Price'
                  meta:
                    $ref: '#/components/schemas/PaginationMeta'
      operationId: getPrices
  /v3/prices/history:
    get:
      tags:
      - Prices
      summary: Historical prices
      description: 'Historical prices for explicit token addresses over a bounded time range.

        Required query params: `chainId`, `addresses`, `from`, `to`.

        Maximum allowed window is 30 days per request.

        '
      x-status: implemented
      x-cache-ttl: 300
      parameters:
      - name: chainId
        in: query
        required: true
        schema:
          type: integer
      - name: addresses
        in: query
        required: true
        schema:
          type: string
        description: Comma-separated token addresses.
      - name: assets
        in: query
        required: false
        deprecated: true
        schema:
          type: string
        description: Deprecated alias for `addresses`.
      - name: from
        in: query
        required: true
        schema:
          type: integer
        description: Inclusive start of the history window as a unix timestamp in seconds (UTC).
      - name: to
        in: query
        required: true
        schema:
          type: integer
        description: Inclusive end of the history window as a unix timestamp in seconds (UTC).
      - $ref: '#/components/parameters/OffsetParam'
      - $ref: '#/components/parameters/LimitParam'
      responses:
        '200':
          description: Historical prices
          headers:
            Cache-Control:
              $ref: '#/components/headers/Cache-Control'
            X-Request-Id:
              $ref: '#/components/headers/X-Request-Id'
          content:
            application/json:
              schema:
                type: object
                properties:
                  data:
                    type: array
                    items:
                      $ref: '#/components/schemas/Price'
                  meta:
                    $ref: '#/components/schemas/PaginationMeta'
        '400':
          $ref: '#/components/responses/Error400'
        '404':
          $ref: '#/components/responses/Error404'
        '429':
          $ref: '#/components/responses/Error429'
        '500':
          $ref: '#/components/responses/Error500'
      operationId: getPricesHistory
components:
  responses:
    Error429:
      description: Rate limited
      headers:
        Retry-After:
          description: Seconds until next request is allowed.
          schema:
            type: integer
        X-Request-Id:
          $ref: '#/components/headers/X-Request-Id'
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
    Error500:
      description: Internal server error
      headers:
        X-Request-Id:
          $ref: '#/components/headers/X-Request-Id'
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
    Error400:
      description: Bad request
      headers:
        X-Request-Id:
          $ref: '#/components/headers/X-Request-Id'
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
    Error404:
      description: Not found
      headers:
        X-Request-Id:
          $ref: '#/components/headers/X-Request-Id'
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
  parameters:
    ChainIdPath:
      name: chainId
      in: path
      required: true
      schema:
        type: integer
    AddressPath:
      name: address
      in: path
      required: true
      schema:
        type: string
    LimitParam:
      name: limit
      in: query
      required: false
      description: Requested page size. Values above the endpoint cap are clamped; the default shared cap is 100.
      schema:
        type: integer
        default: 20
        maximum: 100
    ChainIdParam:
      name: chainId
      in: query
      required: false
      schema:
        type: string
      description: Comma-separated list of chain IDs (single value allowed).
      example: 1,10,8453
    OffsetParam:
      name: offset
      in: query
      required: false
      schema:
        type: integer
        default: 0
  schemas:
    PaginationMeta:
      type: object
      required:
      - timestamp
      properties:
        total:
          type: integer
          description: Exact total count when the endpoint provides one.
        hasMore:
          type: boolean
          description: Indicates whether another page exists beyond the current page.
        offset:
          type: integer
        limit:
          type: integer
          description: Echoed page size after endpoint-side clamping.
        timestamp:
          type: string
          format: date-time
        chainId:
          type: string
          description: Comma-separated chain IDs for multi-chain responses.
    Price:
      type: object
      properties:
        chainId:
          type: integer
        address:
          type: string
        symbol:
          type: string
        decimals:
          type: integer
        priceUsd:
          type: number
          description: Market-normalized USD price number. If `source` is `oracle`, this endpoint still exposes the v3 market-price number; use `/v3/oracles/prices` for exact contract-derived oracle values.
        source:
          type: string
        confidence:
          type: number
          nullable: true
        blockNumber:
          type: string
          nullable: true
        timestamp:
          type: string
          format: date-time
    ErrorResponse:
      type: object
      required:
      - error
      properties:
        error:
          type: object
          required:
          - code
          - message
          - requestId
          properties:
            code:
              type: string
              description: 'Domain error code. Examples:

                - INVALID_ADDRESS

                - CHAIN_NOT_SUPPORTED

                - VAULT_NOT_FOUND

                - TOKEN_NOT_FOUND

                - ACCOUNT_NOT_FOUND

                - VALIDATION_ERROR

                - RATE_LIMIT_EXCEEDED

                - UNSUPPORTED_MEDIA_TYPE

                - UNAUTHORIZED

                - FORBIDDEN

                - INTERNAL_ERROR

                '
            message:
              type: string
            requestId:
              type: string
            details:
              type: object
              additionalProperties: true
  headers:
    X-Request-Id:
      description: Request identifier for tracing.
      schema:
        type: string
    Cache-Control:
      description: Cache policy for this response.
      schema:
        type: string
  securitySchemes:
    ApiKeyAuth:
      type: apiKey
      in: header
      name: X-API-Key
      description: API key authentication (optional; higher rate limits).
    BearerAuth:
      type: http
      scheme: bearer
      bearerFormat: API key
      description: 'Alternative to X-API-Key using Authorization: Bearer <key>'
    AdminSecret:
      type: apiKey
      in: header
      name: X-Admin-Secret
      description: Admin secret (server-to-server) for API key management.
    PlatformSession:
      type: apiKey
      in: cookie
      name: euler_platform_session
      description: Signed, httpOnly platform-operator browser session cookie.
    PlatformCsrf:
      type: apiKey
      in: header
      name: X-CSRF-Token
      description: Double-submit CSRF token required for unsafe cookie-authenticated methods.