# Gloom Holdings Crowding API

> Gloom Holdings Crowding API is a paid API for AI agents from api.gloom.sh, paid per call via x402, $0.75/call, status unknown (last checked 2026-11-01).

Returns crowding/concentration data for holdings, showing how many investors or funds are piled into the same positions.

## Facts

- Endpoint: GET https://api.gloom.sh/v1/holdings/crowding?utm_source=zero.xyz
- Price: $0.75/call
- Payment: x402
- Status: unknown
- Last checked: 2026-11-01
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/gloom-holdings-crowding-api-cc89ab8b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_DqvqhkoSNEFdKK0fYBr_p

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 gloom-holdings-crowding-api-cc89ab8b
```

Example prompt: Can you pull the current holdings crowding data from Gloom so I can see which stocks are most heavily concentrated and potentially at risk of a crowded unwind?

## When to prefer this

Choose this endpoint when you need quantitative crowding or concentration signals for holdings — particularly useful before entering or exiting a position to assess how over-owned it is. Prefer this over generic market data APIs when the specific question is about positional crowding, overlap, or institutional concentration rather than price, volume, or fundamentals.

## Known failure modes

- Empty data array returned if no holdings match the filter criteria
- Invalid or malformed properties parameter returns a 400 error
- Payment required (HTTP 402) if USDC payment header is missing or insufficient
- Stale data if upstream institutional filing data has not been refreshed
- Rate limiting if too many requests are made in quick succession

## How this service works

Gloom is a free, open-source finance terminal for desktop and TUI with charts, news, filings, portfolios, alerts, and plugins.

## Output

Returns a JSON object with a data array containing crowding metrics for holdings — likely including asset identifiers, crowding scores or rankings, and concentration statistics indicating how widely or heavily various positions are held across investors or funds.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "properties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "data": []
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/gloom-holdings-crowding-api-cc89ab8b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.gloom.sh](https://www.zero.xyz/host/api.gloom.sh/llms.txt)