name: Yearn Finance
description: Yearn Finance is a DeFi yield aggregator that automates yield farming
  strategies across EVM-compatible networks. It provides REST and GraphQL APIs for
  accessing vault data, APY rates, strategy information, user positions, TVL metrics,
  and protocol analytics across Ethereum, Optimism, Polygon, Fantom, Base, and Arbitrum.
image: https://yearn.fi/logo.svg
tags:
- DeFi
- Yield Aggregator
- Vaults
- EVM
- Web3
- Blockchain
- Finance
url: https://yearn.fi
apis:
- name: yDaemon REST API
  description: The primary REST API for Yearn Finance providing access to vault data,
    APY calculations, TVL metrics, strategy information, and protocol analytics across
    all supported EVM networks. Used by the production Yearn frontends.
  humanURL: https://docs.yearn.fi/developers/data-services/yearn-data
  baseURL: https://ydaemon.yearn.fi
  tags:
  - Vaults
  - APY
  - TVL
  - Strategies
  - DeFi
  properties:
  - type: Documentation
    url: https://docs.yearn.fi/developers/data-services/yearn-data
  - type: OpenAPI
    url: https://ydaemon.yearn.fi/docs
  - type: GitHubRepository
    url: https://github.com/yearn/ydaemon
  - url: graphql/yearn-graphql.md
    type: GraphQL
  contact:
  - FN: Yearn Finance
    email: ''
    X-twitter: iearnfinance
  apis:
  - name: Get All Vaults
    description: Retrieve all vaults for a specified chain ID. Supports pagination,
      ordering, and filtering by strategy conditions and details.
    humanURL: https://docs.yearn.fi/developers/data-services/yearn-data
    baseURL: https://ydaemon.yearn.fi
    path: /{chainID}/vaults/all
    method: GET
    tags:
    - Vaults
    - Chains
    properties:
    - type: Documentation
      url: https://docs.yearn.fi/developers/data-services/yearn-data
  - name: Get Vault by Address
    description: Retrieve data for a single vault by chain ID and contract address.
      Returns vault metadata, APY, TVL, strategy details, and token information.
    humanURL: https://docs.yearn.fi/developers/data-services/yearn-data
    baseURL: https://ydaemon.yearn.fi
    path: /{chainID}/vaults/{address}
    method: GET
    tags:
    - Vaults
    properties:
    - type: Documentation
      url: https://docs.yearn.fi/developers/data-services/yearn-data
  - name: Get Vaults TVL
    description: Returns Total Value Locked metrics for all vaults on a specified
      chain.
    humanURL: https://docs.yearn.fi/developers/data-services/yearn-data
    baseURL: https://ydaemon.yearn.fi
    path: /{chainID}/vaults/tvl
    method: GET
    tags:
    - TVL
    - Analytics
    properties:
    - type: Documentation
      url: https://docs.yearn.fi/developers/data-services/yearn-data
  - name: Get Supported Chains
    description: Returns the list of blockchain networks supported by the yDaemon
      API, including Ethereum, Optimism, Polygon, Fantom, Base, and Arbitrum.
    humanURL: https://docs.yearn.fi/developers/data-services/yearn-data
    baseURL: https://ydaemon.yearn.fi
    path: /info/chains
    method: GET
    tags:
    - Chains
    - Info
    properties:
    - type: Documentation
      url: https://docs.yearn.fi/developers/data-services/yearn-data
  - name: Get Blacklisted Vaults
    description: Returns the list of vaults blacklisted and excluded from results
      across all supported networks.
    humanURL: https://docs.yearn.fi/developers/data-services/yearn-data
    baseURL: https://ydaemon.yearn.fi
    path: /info/vaults/blacklisted
    method: GET
    tags:
    - Vaults
    - Info
    properties:
    - type: Documentation
      url: https://docs.yearn.fi/developers/data-services/yearn-data
- name: Kong GraphQL API
  description: An integrated indexing service and GraphQL API providing comprehensive
    data on Yearn V2 and V3 vault ecosystems, including contract snapshots, event
    histories, vault-strategy relationships, fees, rewards, APY, and TVL timeseries
    data.
  humanURL: https://docs.yearn.fi/developers/data-services/yearn-data
  baseURL: https://kong.yearn.fi
  tags:
  - GraphQL
  - Vaults
  - Analytics
  - Strategies
  - Events
  properties:
  - type: Documentation
    url: https://docs.yearn.fi/developers/data-services/yearn-data
  - type: GitHubRepository
    url: https://github.com/yearn/kong
  contact:
  - FN: Yearn Finance
    email: ''
    X-twitter: iearnfinance
  apis:
  - name: Kong GraphQL Query
    description: GraphQL endpoint for querying Yearn V2 and V3 vault ecosystem data
      including snapshots, events, APY timeseries, TVL, strategies, fees, rewards,
      and vault metadata.
    humanURL: https://docs.yearn.fi/developers/data-services/yearn-data
    baseURL: https://kong.yearn.fi
    path: /api/gql
    method: POST
    tags:
    - GraphQL
    - Vaults
    - Analytics
    properties:
    - type: Documentation
      url: https://docs.yearn.fi/developers/data-services/yearn-data
modified: 2026-06-13
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com