# BaseBuilder Trading Holder Concentration Analysis

> BaseBuilder Trading Holder Concentration Analysis is a paid API for AI agents from bb-trading-gold.vercel.app, paid per call via x402, $0.091938/call, status unknown (last checked 2026-09-13).

Analyzes the concentration of token holders for a given asset, revealing how ownership is distributed across wallets

## Facts

- Endpoint: POST https://bb-trading-gold.vercel.app/api/holder/concentration
- Price: $0.091938/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/basebuilder-trading-holder-concentration-analysis-06acf107
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_9egnypXZPv5H1vXwNtBTw

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 basebuilder-trading-holder-concentration-analysis-06acf107 -d '<json body>'
```

Example prompt: Can you check the holder concentration for the token at contract address 0xAbC123... on Base — I want to know if it's heavily dominated by whales or if ownership is spread out?

## When to prefer this

Use this endpoint when you need to quantitatively assess the ownership distribution and whale risk of a specific token on Base or supported chains, particularly for DeFi due-diligence, risk scoring, or investment analysis workflows.

## Known failure modes

- Invalid or unrecognized contract address returns an error
- Token has insufficient holder data to compute concentration
- Network/chain not supported returns 400 or 422
- Upstream on-chain data provider timeout or unavailability
- Payment authorization failure via x402 protocol

## How this service works

BaseBuilder Trading API hub - 20 paid endpoints

## Output

Returns concentration metrics showing how token ownership is distributed across holder wallets, including metrics such as top-holder percentage breakdowns, Gini coefficient or similar concentration score, and whale dominance indicators.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/basebuilder-trading-holder-concentration-analysis-06acf107/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from bb-trading-gold.vercel.app](https://www.zero.xyz/host/bb-trading-gold.vercel.app/llms.txt)