yDaemon

yDaemon is a next-generation REST API aggregator and indexer for Yearn Finance. It serves as the primary data service for Yearn's production frontends, providing comprehensive, real-time data about vaults, strategies, tokens, prices, and APR calculations across multiple blockchain networks. One old medium post sharing a yDaemon overview is here. For more detailed docs, reference deepwiki.

Key Features

Multi-Chain Support: Ethereum, Optimism, Gnosis, Polygon, Sonic, Fantom, Arbitrum, Katana, and Base
Real-time Data Indexing: Continuously monitors blockchain state across all supported chains
APY/APR Calculations: Complex yield calculations including historical tracking and forward projections
Price Aggregation: Multi-source price feeds updated every 30 seconds
Vault Classification: Automatic categorization (V2, V3, Juiced, Gimme, Curve, Velodrome, etc.)
Strategy Analytics: Detailed strategy performance metrics and harvest history
Risk Scoring: 11-factor risk assessment system for vault safety

Update Frequencies

Prices: Every 30 seconds
APY information: Every 10 minutes
Metadata: Every minute

Supported Chains

Chain ID	Network
1	Ethereum Mainnet
10	Optimism
100	Gnosis
137	Polygon
146	Sonic
250	Fantom
8453	Base
42161	Arbitrum
747474	Katana

API Endpoints

Example calls

List vaults on Yearn UI

https://ydaemon.yearn.fi/vaults/v3?hideAlways=true&strategiesDetails=withDetails&strategiesCondition=inQueue&chainIDs=1,10,137,250,8453,42161,747474

List retired vaults

https://ydaemon.yearn.fi/vaults/retired

Vault Endpoints

All Chains (Simplified Format)

GET /vaults                          # All Yearn vaults (all chains)
GET /vaults/all                      # Same as above
GET /vaults/detected                 # All detected vaults
GET /vaults/v2                       # All V2 Yearn vaults
GET /vaults/v3                       # All V3 Yearn vaults
GET /vaults/juiced                   # Juiced vaults
GET /vaults/gimme                    # Gimme vaults
GET /vaults/retired                  # Retired vaults
GET /vaults/pendle                   # Pendle integration vaults
GET /vaults/optimism                 # Optimism-specific vaults
GET /vaults/pooltogether             # PoolTogether integration
GET /vaults/cove                     # Cove integration
GET /vaults/morpho                   # Morpho vaults
GET /vaults/katana                   # Katana vaults
GET /vaults/ajna                     # Ajna vaults
GET /vaults/velodrome                # Velodrome vaults
GET /vaults/aerodrome                # Aerodrome vaults
GET /vaults/curve                    # Curve vaults
GET /vaults/tvl                      # Total TVL across all chains

Chain-Specific (Legacy Format)

GET /{chainID}/vaults/all                    # All vaults for specific chain
GET /{chainID}/vaults/v2/all                 # V2 vaults for chain
GET /{chainID}/vaults/v3/all                 # V3 vaults for chain
GET /{chainID}/vaults/juiced/all             # Juiced vaults for chain
GET /{chainID}/vaults/gimme/all              # Gimme vaults for chain
GET /{chainID}/vaults/retired                # Retired vaults for chain
GET /{chainID}/vaults/some/{addresses}       # Multiple specific vaults (comma-separated)
GET /{chainID}/vaults/{address}              # Single vault details
GET /{chainID}/vault/{address}               # Same as above
GET /{chainID}/vaults/tvl                    # TVL for specific chain

Pagination & Sorting Query Parameters:

page (numeric)

Default: 1
Range: 1-3000
Used in: Vault list endpoints

limit (numeric)

Default: 200
Range: 1-3000 (or 1-1000 for Rotki endpoints)
Records per page

skip (numeric)

Default: 0
Range: 0-10000
Records to skip (Rotki-specific)

orderBy (string)

Default: 'featuringScore'
Valid values: featuringScore, name, symbol, decimals, type, tvl, address, version, timestamp, profit, loss, profitValue, lossValue
Legacy-specific: apr.net_apy, apr.composite.boost, apr.points.week_ago, apr.type, details.order

orderDirection (string)

Default: 'asc'
Valid values: asc, desc

Filtering Query Parameters:

strategiesCondition (string)

Default: 'debtRatio'
Valid values:
- all - Include all strategies
- inQueue - Only strategies in withdrawal queue
- debtLimit - Only strategies with non-zero debt limit
- debtRatio - Strategies with non-zero debt ratio allocation
- absolute - Strategies with actual debt > 0

hideAlways (boolean)

Default: false
Valid values: true/false (or 1/0, yes/no)
Hides vaults marked as hidden or retired
Incompatible with migrable=true

migrable (string)

Default: 'none'
Valid values:
- none - Don't include migrable vaults if hideAlways/retired
- all - Include all migrable vaults
- nodust - Include migrable vaults with TVL > $100
- ignore - Completely ignore vaults with migrations available
Incompatible with hideAlways=true

chainIDs (string)

Default: All supported chains
Valid values: Comma-separated chain IDs: 1, 10, 137, 250, 8453, 42161
Example: "1,137,42161"
Supported chains:
- 1 = Ethereum
- 10 = Optimism
- 137 = Polygon
- 250 = Fantom
- 8453 = Base
- 42161 = Arbitrum

humanized (boolean)

Default: false
Valid values: true/false
Used in: Price endpoints
Returns floating-point prices instead of raw big integers
?skip=N - Skip N vaults from the query (default: 0)
?first=N - Limit results to N vaults

Strategy Endpoints

GET /{chainID}/strategies/all                # All strategies for chain
GET /{chainID}/strategies/{address}          # Specific strategy details
GET /{chainID}/strategy/{address}            # Same as above
GET /{chainID}/reports/{address}             # Harvest reports for strategy

Harvest & User Earnings Endpoints

GET /{chainID}/vaults/harvests/{addresses}   # Harvest history for vaults
GET /{chainID}/earned/{address}/{vaults}     # Earnings per vault per user
GET /{chainID}/earned/{address}              # All earnings for user on chain
GET /earned/{address}                        # All earnings for user (all chains)

Token Endpoints

GET /tokens/all                              # All tokens (all chains)
GET /{chainID}/tokens/all                    # All tokens for chain

Price Endpoints

GET /prices/all                              # All prices (all chains)
GET /{chainID}/prices/all                    # All prices for chain
GET /{chainID}/prices/{address}              # Price for specific token
GET /{chainID}/prices/some/{addresses}       # Prices for multiple tokens
GET /{chainID}/prices/all/details            # All prices with metadata
GET /prices/some/{addresses}                 # Prices across chains
POST /prices/some                            # POST body with addresses array

Price Format: Returns price in USD with 6 decimal precision (e.g., "999727" = $0.999727)

Info/Utility Endpoints

GET /                                        # Welcome message
GET /health                                  # Health check with timestamp
GET /info/chains                             # Supported chains configuration
GET /info/vaults/blacklisted                 # Blacklisted vault addresses
GET /{chainID}/status                        # Chain indexing status

Custom Integration Endpoints

GET /rotki/list/vaults                       # Vaults formatted for Rotki
GET /rotki/count/vaults                      # Vault count for Rotki

Risk Score System

The riskScore array in vault data contains 11 risk factors (scored 0-5 each):

Index	Risk Factor
0	Code review quality
1	Testing coverage and quality
2	Code complexity
3	Market risk exposure
4	Protocol integration complexity
5	Centralization risk
6	External protocol audit status
7	External protocol centralization
8	External protocol TVL size
9	External protocol longevity
10	External protocol type risk

Overall Risk Level:

-1: Not assessed
1: Safest
5: Riskiest

Vault Categories

Vault Types

"Yearn Vault" - Yearn V2 vaults
"Automated Yearn Vault" - Yearn V3 vaults
Various integration-specific types

Vault Kinds

"Legacy" - Older vault versions
"Single Strategy" - One strategy per vault
"Multi Strategy" - Multiple strategies (V3)

Architecture Overview

Data Sources

yDaemon aggregates data from multiple sources:

Yearn Subgraph: Base data source for vault and strategy information
Yearn Meta: Configuration and metadata (risk scores, descriptions, icons)
Yearn Lens Oracle: On-chain price data for tokens and vaults
Blockchain RPC: Direct chain queries via Tenderly and other providers
Curve API: Pool and gauge information for Curve vaults
External Price Feeds: Gamma, Pendle, and other protocol-specific data

Caching Strategy

Vault Data: 5-minute cache TTL
Price Data: 1-minute cache TTL
Token Data: 5-minute cache TTL
Background daemons refresh data continuously

Performance & Features

Handles multiple chains simultaneously
Websocket support for real-time updates (where available)
Batch operations via multicall contracts
Optimized block range queries per chain
CORS enabled for all origins
gzip compression enabled

Code Examples

Fetch All Vaults on Ethereum

curl https://ydaemon.yearn.fi/1/vaults/all

// JavaScript/TypeScript
const response = await fetch('https://ydaemon.yearn.fi/1/vaults/all');
const vaults = await response.json();

console.log(`Found ${vaults.length} vaults`);
vaults.forEach(vault => {
  console.log(`${vault.name}: TVL $${vault.tvl.tvl.toLocaleString()}`);
});

# Python
import requests

response = requests.get('https://ydaemon.yearn.fi/1/vaults/all')
vaults = response.json()

for vault in vaults:
    print(f"{vault['name']}: TVL ${vault['tvl']['tvl']:,.2f}")

Get Specific Vault Details

# Get yvDAI vault details
curl https://ydaemon.yearn.fi/1/vaults/0xdA816459F1AB5631232FE5e97a05BBBb94970c95

// TypeScript with type safety
interface VaultResponse {
  address: string;
  name: string;
  symbol: string;
  tvl: {
    totalAssets: string;
    tvl: number;
    price: number;
  };
  apr: {
    netAPR: number;
    fees: {
      performance: number;
      management: number;
    };
  };
}

const getVaultDetails = async (chainId: number, vaultAddress: string): Promise<VaultResponse> => {
  const response = await fetch(`https://ydaemon.yearn.fi/${chainId}/vaults/${vaultAddress}`);
  return await response.json();
};

const vault = await getVaultDetails(1, '0xdA816459F1AB5631232FE5e97a05BBBb94970c95');
console.log(`APR: ${(vault.apr.netAPR * 100).toFixed(2)}%`);

Get Token Prices

# Get DAI price
curl https://ydaemon.yearn.fi/1/prices/0x6B175474E89094C44Da98b954EedeAC495271d0F
# Returns: "999727" (meaning $0.999727)

// Get multiple token prices
const tokens = [
  '0x6B175474E89094C44Da98b954EedeAC495271d0F', // DAI
  '0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48', // USDC
];

const addresses = tokens.join(',');
const response = await fetch(`https://ydaemon.yearn.fi/1/prices/some/${addresses}`);
const prices = await response.json();

// Convert from 6-decimal format to standard price
Object.entries(prices).forEach(([address, price]) => {
  console.log(`Token ${address}: $${(price / 1e6).toFixed(6)}`);
});

Get User Earnings

# Get earnings for a user across all vaults on Ethereum
curl https://ydaemon.yearn.fi/1/earned/0x742d35Cc6634C0532925a3b844Bc454e4438f44e

Pagination Example

// Fetch vaults in batches
const BATCH_SIZE = 100;
let allVaults = [];
let skip = 0;

while (true) {
  const response = await fetch(
    `https://ydaemon.yearn.fi/1/vaults/all?first=${BATCH_SIZE}&skip=${skip}`
  );
  const vaults = await response.json();

  if (vaults.length === 0) break;

  allVaults = allVaults.concat(vaults);
  skip += BATCH_SIZE;

  if (vaults.length < BATCH_SIZE) break; // Last page
}

console.log(`Total vaults: ${allVaults.length}`);

Key Features​

Update Frequencies​

Supported Chains​

API Endpoints​

Example calls​

List vaults on Yearn UI​

List retired vaults​

Vault Endpoints​

All Chains (Simplified Format)​

Chain-Specific (Legacy Format)​

Strategy Endpoints​

Harvest & User Earnings Endpoints​

Token Endpoints​

Price Endpoints​

Info/Utility Endpoints​

Custom Integration Endpoints​

Risk Score System​

Vault Categories​

Vault Types​

Vault Kinds​

Architecture Overview​

Data Sources​

Caching Strategy​

Performance & Features​

Code Examples​

Fetch All Vaults on Ethereum​

Get Specific Vault Details​

Get Token Prices​

Get User Earnings​

Pagination Example​