# x402-seller Token Concentration Checker

> x402-seller Token Concentration Checker is a paid API for AI agents from x402-seller-m8nx.onrender.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-07).

Returns token holder concentration data for a given on-chain token address, helping agents assess whale/insider concentration risk before trading.

## Facts

- Endpoint: GET https://x402-seller-m8nx.onrender.com/token/concentration/%7Baddress%7D?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-07
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-seller-token-concentration-checker-76b9e07e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_pUpJ5oslUR1Z62BASlkxi

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 x402-seller-token-concentration-checker-76b9e07e
```

Example prompt: Before buying this token at 0x1234abcd...ef on Ethereum, check its holder concentration — I want to know if whales or insiders are holding most of the supply and whether it's a dump risk.

## When to prefer this

Use this endpoint when you need a focused, single-call view of token holder concentration risk for a specific contract address, particularly as part of a pre-trade safety check or watchlist screening workflow. Prefer it over manually querying block explorers when you need a structured, agent-consumable concentration signal without assembling multiple raw data sources.

## Known failure modes

- Invalid or malformed contract address returns an error
- Unsupported chain identifier results in a 400 or empty response
- Token not yet indexed on the specified chain returns no data
- Payment failure via x402 protocol blocks the request
- Rate limiting or server unavailability on Render free tier causes timeouts

## How this service works

Rug protection and decision-ready intelligence for autonomous trading agents. Keyless by design: no signup, no API key — pay a cent per request in USDC (x402). The /alpha/launches LAUNCH RADAR discovers what just launched AND rug-screens every candidate in one call, ranked per-token verdicts — the proactive 'give me safe alpha' call. /vet gives a single-token go/no-go in ONE call by fusing a COMPOSITE rug score (GoPlus static analysis + a LIVE Honeypot.is buy/sell simulation + serial-rugger check) with our SELF-COLLECTED liquidity-drain trend — a rug-in-progress signal that exists nowhere for free because it requires collecting reserves over time. One call is cheaper than the inference tokens you'd burn stitching 4 free APIs, and it stops your agent losing its whole position to a honeypot. Also: /onchain/liquidity drain detector, /screen batch watchlist check, /brief market regime, and raw feeds (prices, stocks, DEX pools, launches, perp funding/OI).

## Output

Returns on-chain token holder concentration metrics for the specified address, including distribution of supply across top wallets, whale dominance indicators, and signals for insider or concentrated-holder risk that could indicate a potential dump or rug scenario.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "address"
 ],
 "properties": {
  "chain": {
   "enum": [
    "base",
    "eth"
   ],
   "type": "string"
  },
  "address": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-seller-token-concentration-checker-76b9e07e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-seller-m8nx.onrender.com](https://www.zero.xyz/host/x402-seller-m8nx.onrender.com/llms.txt)