# klymax402 Token Holders API

> klymax402 Token Holders API is a paid API for AI agents from klymax402.com, paid per call via x402, $0.012/call, status unknown (last checked 2026-09-14).

Returns top token holders, total holder count, and concentration metrics for an ERC-20 token contract on Ethereum or Base.

## Facts

- Endpoint: GET https://klymax402.com/api/token-holders/api/holders
- Price: $0.012/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/klymax402-token-holders-api-d3d69d27
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_lO-ilwJt0uRBwWeFDMJ0w

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability klymax402-token-holders-api-d3d69d27
```

Example prompt: Can you pull up the top token holders and concentration data for the USDC contract at 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48 on Ethereum?

## When to prefer this

Use this endpoint when you need on-chain token holder analytics — specifically top holder rankings, total unique holder counts, and ownership concentration — for ERC-20 tokens on Ethereum or Base, without managing your own blockchain node or indexer. It's a good fit for DeFi due diligence, whale-watching, or decentralization analysis at $0.012/call with no API key required.

## Known failure modes

- Invalid or non-existent contract address returns an error or empty holder list
- Unsupported chain value returns a validation error
- Contract address belongs to a non-ERC-20 contract, resulting in no holder data
- Rate limiting or payment failure (402) if USDC balance is insufficient
- Network-specific indexing delays may result in slightly stale holder data

## How this service works

One MCP endpoint gives your AI agent access to 100 APIs -- crypto, DeFi, web, AI, finance and utilities. No API keys, USDC on Base from $0.003/call.

## Output

Returns a JSON object containing the chain name, token contract address, an array of top holders (wallet addresses and their balances/percentages), the total number of unique holders, and a concentration object summarizing ownership distribution (e.g. Gini coefficient or top-N percentages).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "address"
     ],
     "properties": {
      "chain": {
       "type": "string",
       "description": "Chain: base, ethereum (default: ethereum)"
      },
      "address": {
       "type": "string",
       "description": "Token contract address (0x...)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "chain": "example",
  "address": "example",
  "topHolders": [],
  "totalHolders": 1,
  "concentration": {}
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/klymax402-token-holders-api-d3d69d27/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from klymax402.com](https://www.zero.xyz/host/klymax402.com/llms.txt)