Euler Finance Tokens API

openapi: 3.1.0
info:
  title: Euler Data API (V3) Accounts Tokens 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: Tokens
  description: Token metadata, protocol classifications, and related static reference data used throughout the API.
paths:
  /v3/tokens:
    get:
      tags:
      - Tokens
      summary: Token list
      x-status: implemented
      x-cache-ttl: 300
      parameters:
      - $ref: '#/components/parameters/ChainIdParam'
      - name: address
        in: query
        required: false
        description: Filter by a token address. May be repeated. Combine with chainId for the fastest lookup path. Counts toward the 100-address filter cap. When address filters are present and limit is omitted, the default limit is the requested address count capped at 100.
        schema:
          type: string
          example: '0x0000000000085d4780B73119b644AE5ecd22b376'
      - name: addresses
        in: query
        required: false
        description: Filter by comma-separated token addresses. May be repeated. Maximum 100 addresses. Combine with chainId for the fastest lookup path. When address filters are present and limit is omitted, the default limit is the requested address count capped at 100.
        schema:
          type: string
          example: 0x0000000000085d4780B73119b644AE5ecd22b376,0x00000000eFE302BEAA2b3e6e1b18d08D69a9012a
      - $ref: '#/components/parameters/FieldsParam'
      - $ref: '#/components/parameters/OffsetParam'
      - $ref: '#/components/parameters/TokenLimitParam'
      - name: search
        in: query
        required: false
        schema:
          type: string
      - name: type
        in: query
        required: false
        description: 'Filter by token classification. Comma-separated values: base, debt, unitOfAccount, oracleAsset, reward, swapAsset'
        schema:
          type: string
          example: base,debt
      responses:
        '200':
          description: Tokens
          headers:
            Cache-Control:
              $ref: '#/components/headers/Cache-Control'
            X-Request-Id:
              $ref: '#/components/headers/X-Request-Id'
          content:
            application/json:
              example:
                data:
                - chainId: 1
                  address: '0x000000000085d4780B73119b644AE5ecd22b376'
                  name: TrueUSD
                  symbol: TUSD
                  decimals: 18
                  logoURI: https://token-images.euler.finance/1/0x000000000085d4780B73119b644AE5ecd22b376?v=492516
                  tags:
                  - usd
                meta:
                  total: 1874
                  offset: 0
                  limit: 1
                  timestamp: '2026-03-30T13:04:02.594Z'
                  chainId: '1'
              schema:
                type: object
                properties:
                  data:
                    type: array
                    items:
                      $ref: '#/components/schemas/Token'
                  meta:
                    $ref: '#/components/schemas/PaginationMeta'
      operationId: getTokens
components:
  parameters:
    TokenLimitParam:
      name: limit
      in: query
      required: false
      description: Requested token page size. Values above 500 are clamped.
      schema:
        type: integer
        default: 20
        maximum: 500
    OffsetParam:
      name: offset
      in: query
      required: false
      schema:
        type: integer
        default: 0
    ChainIdParam:
      name: chainId
      in: query
      required: false
      schema:
        type: string
      description: Comma-separated list of chain IDs (single value allowed).
      example: 1,10,8453
    FieldsParam:
      name: fields
      in: query
      required: false
      schema:
        type: string
      description: Comma-separated list of fields to include.
  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.
    Token:
      type: object
      properties:
        chainId:
          type: integer
        address:
          type: string
        name:
          type: string
        symbol:
          type: string
        decimals:
          type: integer
        logoURI:
          type: string
          description: Preferred token image URI. Served from the Euler token image CDN with an hourly cache-busting query param.
        priceUsd:
          type: number
          description: Market USD price number when token list responses include a price.
        metadata:
          $ref: '#/components/schemas/TokenMetadata'
        groups:
          type: array
          items:
            type: string
          description: Asset group associations (e.g., pendle-pt, pendle-lp).
        tags:
          type: array
          items:
            type: string
            enum:
            - usd
            - eth
            - btc
          description: CoinGecko category and symbol-derived correlation tags used by clients for asset-specific processing.
    TokenMetadata:
      type: object
      description: Protocol integration metadata for a token.
      properties:
        isPendlePT:
          type: boolean
        isPendleLP:
          type: boolean
        pendleMarket:
          type: string
          nullable: true
      additionalProperties: true
  headers:
    Cache-Control:
      description: Cache policy for this response.
      schema:
        type: string
    X-Request-Id:
      description: Request identifier for tracing.
      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.