# ERC-20 Top Holder Concentration Check

> ERC-20 Top Holder Concentration Check is a paid API for AI agents from meryol-payai.hf.space, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-15).

Returns top-10 holder concentration metrics for an ERC-20 token on a given chain, enabling pre-trade exit-liquidity risk assessment.

## Facts

- Endpoint: GET https://meryol-payai.hf.space/holders/top/:chain/:token
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/erc-20-top-holder-concentration-check-104b4372
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_CUmNLuOPogcsb4SiGUhC_

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 erc-20-top-holder-concentration-check-104b4372
```

Example prompt: Before I swap into this token, check the top-holder concentration for 0x6B175474E89094C44Da98b954EedeAC495271d0F on Ethereum — I want to know if the top 10 holders dominate the supply and whether they're contracts or regular wallets.

## When to prefer this

Use this endpoint when an AI agent needs to assess pre-trade exit-liquidity risk for an ERC-20 token on Ethereum, Base, Arbitrum, or Optimism. It is specifically useful when the user wants to know if a token is whale-dominated, LP-excluded concentration, or largely held by contracts — before executing a swap or position. Prefer this over generic token info endpoints when holder-distribution risk is the primary concern.

## Known failure modes

- Invalid token address format (not a valid 0x hex address) returns 422 validation error
- Unsupported chain name returns enum validation error
- Token not found or no holder data available on the requested chain returns empty or 404 response
- Rate limiting or upstream data provider outage returns 5xx error
- Payment not provided or insufficient returns 402 Payment Required

## How this service works

Pre-trade exit-liquidity check for an ERC-20: top-10 holder concentration %, ex-LP/ex-known-router concentration, per-holder balance %, contract-or-EOA flag. High concentration = thin exit liquidity. Chains: ethereum, base, arbitrum, optimism.

## Output

Returns the percentage of supply held by the top 10 holders (overall concentration), the concentration excluding known LPs and routers, a breakdown of each holder's balance percentage, and a contract-or-EOA flag per holder — giving a clear picture of whether exit liquidity is thin or healthy.

## Example request

```json
{
 "input": {
  "type": "http",
  "method": "GET",
  "pathParams": {
   "chain": "ethereum",
   "token": "0x6B175474E89094C44Da98b954EedeAC495271d0F"
  }
 }
}
```

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "pathParams": {
     "type": "object",
     "required": [
      "chain",
      "token"
     ],
     "properties": {
      "chain": {
       "enum": [
        "ethereum",
        "base",
        "arbitrum",
        "optimism"
       ],
       "type": "string"
      },
      "token": {
       "type": "string",
       "pattern": "^0x[0-9a-fA-F]{40}$"
      }
     }
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "required": [
      "holders",
      "top_n_concentration_pct"
     ]
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/erc-20-top-holder-concentration-check-104b4372/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from meryol-payai.hf.space](https://www.zero.xyz/host/meryol-payai.hf.space/llms.txt)