httpay.xyz Token Holder Monitor

x402

httpay.xyz Token Holder Monitor is a paid API for AI agents from httpay.xyz, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).

Tracks the top 10 holders, whale distribution, and concentration (HHI) for any token on a specified chain

Price / call$0.005

Seller volume →—

Success—

StatusUnknown

How this service works

Token Holder Monitor — tracks top 10 holders, whale distribution & concentration (HHI) for any token. Params: ?token=USDC&chain=base. Demo: ?demo=true.

Output

Returns a ranked list of the top 10 token holders with their addresses and balances, whale distribution breakdown, and a Herfindahl-Hirschman Index (HHI) score indicating how concentrated token ownership is.

Example use cases

Example prompt

“Show me the top 10 holders of USDC on Base and tell me how concentrated the ownership is — I want to know the HHI and whether whales dominate the supply.”

Technical details

Endpoint

POSThttps://httpay.xyz/api/token-holder-monitor

When to prefer

Use this endpoint when you need a quick snapshot of token holder concentration, whale dominance, and top-holder rankings for a specific token on Base or another supported chain. Prefer this over generic block explorers when you need the HHI concentration metric computed automatically alongside ranked holder data.

Side effects

Unknown or unsupported token symbol returns an error or empty result
Unsupported chain identifier returns a validation error
On-chain data temporarily unavailable causes a timeout or partial result
Demo mode returns synthetic data not reflecting real holders
Malformed request (missing token or chain param) returns a 400-level error

Input

{
  "chain": "base",
  "token": "USDC"
}

Output

{
  "demo": false,
  "meta": {
    "x402": true,
    "poweredBy": "Alfred Zhang 🫡"
  },
  "note": "Live holder data requires Basescan Pro API key — showing representative demo data. Set BASESCAN_API_KEY in environment for live data.",
  "chain": "base",
  "token": "USDC",
  "errors": [
    "Holder API: NOTOK"
  ],
  "fetchedAt": "2026-06-12T04:16:36.630Z",
  "topHolders": [
    {
      "rank": 1,
      "type": "protocol",
      "label": "Aave: USDC Pool (Base)",
      "address": "0xa238Dd80C259a72e81d7e4664a9801593F98d1c5",
      "balance": "1200000000.00",
      "pctOfSupply": "26.67"
    },
    {
      "rank": 2,
      "type": "protocol",
      "label": "Moonwell: cUSDC Pool",
      "address": "0x47cbe25bbdb40a774cc37e1da92d10c2c7ec897f",
      "balance": "850000000.00",
      "pctOfSupply": "18.89"
    },
    {
      "rank": 3,
      "type": "protocol",
      "label": "Morpho: USDC Market",
      "address": "0x9c4ec768c28032803d9a38a8346f597e8949c0a6",
      "balance": "620000000.00",
      "pctOfSupply": "13.78"
    },
    {
      "rank": 4,
      "type": "custodian",
      "label": "Circle (Mint Reserve)",
      "address": "0x55fe002aeff02f77364de339a1292923a15844b8",
      "balance": "400000000.00",
      "pctOfSupply": "8.89"
    },
    {
      "rank": 5,
      "type": "exchange",
      "label": "Coinbase Exchange",
      "address": "0x3cD751E6b0078Be393132286c442345e5dc49699",
      "balance": "280000000.00",
      "pctOfSupply": "6.22"
    },
    {
      "rank": 6,
      "type": "dex",
      "label": "Uniswap V3: Router",
      "address": "0x2626664c2603336e57b271c5c0b26f421741e481",
      "balance": "150000000.00",
      "pctOfSupply": "3.33"
    },
    {
      "rank": 7,
      "type": "dex",
      "label": "Aerodrome LP",
      "address": "0xcf77a3ba9a5ca399b7c97c74d54e5b1beb874e43",
      "balance": "95000000.00",
      "pctOfSupply": "2.11"
    },
    {
      "rank": 8,
      "type": "unknown",
      "label": "Unknown Whale",
      "address": "0x6Ac7f77ef6a929c8EaE7aaa7400C9830c66E5900",
      "balance": "62000000.00",
      "pctOfSupply": "1.38"
    },
    {
      "rank": 9,
      "type": "unknown",
      "label": "Unknown Whale",
      "address": "0x1B7BA42Ab36Fd5D3f40A7c27E26b05d63c1e8c17",
      "balance": "44000000.00",
      "pctOfSupply": "0.98"
    },
    {
      "rank": 10,
      "type": "unknown",
      "label": "Unknown Wallet",
      "address": "0xfA9423D559a688cCEfe0fcE6d6f8aE3E91E9e5A2",
      "balance": "28000000.00",
      "pctOfSupply": "0.62"
    }
  ],
  "totalSupply": "4500000000.000000",
  "concentration": {
    "insight": "Top 3 holders control 59.3% of supply — mostly DeFi protocols. Concentration is healthy for a stablecoin (protocols lock USDC for lending).",
    "hhiIndex": 1247,
    "hhiLabel": "Moderately Concentrated",
    "top10SharePct": "82.87"
  },
  "contractAddress": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
  "totalSupplyFormatted": "$4.5B"
}

Schema · Response

{
  "type": "json",
  "example": {
    "description": "Token Holder Monitor — tracks top 10 holders, whale distribution & concentration (HHI) for any token. Params: ?token=USDC&chain=base. Demo: ?demo=true."
  }
}

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How this service works

Token Holder Monitor — tracks top 10 holders, whale distribution & concentration (HHI) for any token. Params: ?token=USDC&chain=base. Demo: ?demo=true.

Output

Technical details

Endpoint

POSThttps://httpay.xyz/api/token-holder-monitor

When to prefer

Side effects

Unknown or unsupported token symbol returns an error or empty result
Unsupported chain identifier returns a validation error
On-chain data temporarily unavailable causes a timeout or partial result
Demo mode returns synthetic data not reflecting real holders
Malformed request (missing token or chain param) returns a 400-level error

Input

{
  "chain": "base",
  "token": "USDC"
}

Output

{
  "demo": false,
  "meta": {
    "x402": true,
    "poweredBy": "Alfred Zhang 🫡"
  },
  "note": "Live holder data requires Basescan Pro API key — showing representative demo data. Set BASESCAN_API_KEY in environment for live data.",
  "chain": "base",
  "token": "USDC",
  "errors": [
    "Holder API: NOTOK"
  ],
  "fetchedAt": "2026-06-12T04:16:36.630Z",
  "topHolders": [
    {
      "rank": 1,
      "type": "protocol",
      "label": "Aave: USDC Pool (Base)",
      "address": "0xa238Dd80C259a72e81d7e4664a9801593F98d1c5",
      "balance": "1200000000.00",
      "pctOfSupply": "26.67"
    },
    {
      "rank": 2,
      "type": "protocol",
      "label": "Moonwell: cUSDC Pool",
      "address": "0x47cbe25bbdb40a774cc37e1da92d10c2c7ec897f",
      "balance": "850000000.00",
      "pctOfSupply": "18.89"
    },
    {
      "rank": 3,
      "type": "protocol",
      "label": "Morpho: USDC Market",
      "address": "0x9c4ec768c28032803d9a38a8346f597e8949c0a6",
      "balance": "620000000.00",
      "pctOfSupply": "13.78"
    },
    {
      "rank": 4,
      "type": "custodian",
      "label": "Circle (Mint Reserve)",
      "address": "0x55fe002aeff02f77364de339a1292923a15844b8",
      "balance": "400000000.00",
      "pctOfSupply": "8.89"
    },
    {
      "rank": 5,
      "type": "exchange",
      "label": "Coinbase Exchange",
      "address": "0x3cD751E6b0078Be393132286c442345e5dc49699",
      "balance": "280000000.00",
      "pctOfSupply": "6.22"
    },
    {
      "rank": 6,
      "type": "dex",
      "label": "Uniswap V3: Router",
      "address": "0x2626664c2603336e57b271c5c0b26f421741e481",
      "balance": "150000000.00",
      "pctOfSupply": "3.33"
    },
    {
      "rank": 7,
      "type": "dex",
      "label": "Aerodrome LP",
      "address": "0xcf77a3ba9a5ca399b7c97c74d54e5b1beb874e43",
      "balance": "95000000.00",
      "pctOfSupply": "2.11"
    },
    {
      "rank": 8,
      "type": "unknown",
      "label": "Unknown Whale",
      "address": "0x6Ac7f77ef6a929c8EaE7aaa7400C9830c66E5900",
      "balance": "62000000.00",
      "pctOfSupply": "1.38"
    },
    {
      "rank": 9,
      "type": "unknown",
      "label": "Unknown Whale",
      "address": "0x1B7BA42Ab36Fd5D3f40A7c27E26b05d63c1e8c17",
      "balance": "44000000.00",
      "pctOfSupply": "0.98"
    },
    {
      "rank": 10,
      "type": "unknown",
      "label": "Unknown Wallet",
      "address": "0xfA9423D559a688cCEfe0fcE6d6f8aE3E91E9e5A2",
      "balance": "28000000.00",
      "pctOfSupply": "0.62"
    }
  ],
  "totalSupply": "4500000000.000000",
  "concentration": {
    "insight": "Top 3 holders control 59.3% of supply — mostly DeFi protocols. Concentration is healthy for a stablecoin (protocols lock USDC for lending).",
    "hhiIndex": 1247,
    "hhiLabel": "Moderately Concentrated",
    "top10SharePct": "82.87"
  },
  "contractAddress": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
  "totalSupplyFormatted": "$4.5B"
}

Schema · Response

{
  "type": "json",
  "example": {
    "description": "Token Holder Monitor — tracks top 10 holders, whale distribution & concentration (HHI) for any token. Params: ?token=USDC&chain=base. Demo: ?demo=true."
  }
}