# Dataroma Superinvestors Portfolio Tracker

> Dataroma Superinvestors Portfolio Tracker is a paid API for AI agents from api.chainmarket-api.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-24).

Fetches a list of top superinvestor (institutional fund manager) portfolios and holdings data from Dataroma

## Facts

- Endpoint: GET https://api.chainmarket-api.workers.dev/api/finance/dataroma-superinvestors?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-24
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/dataroma-superinvestors-portfolio-tracker-69cb3cb7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_HkWYhKMDjK2drSj6WzWfB

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 dataroma-superinvestors-portfolio-tracker-69cb3cb7
```

Example prompt: Pull the top 20 superinvestors from Dataroma so I can see which institutional fund managers are being tracked and what they're holding.

## When to prefer this

Use this endpoint when you need structured data about top institutional fund managers (superinvestors) as tracked by Dataroma, especially for value investing research, portfolio analysis, or building dashboards around famous investors' holdings. Prefer this over manual scraping of Dataroma or generic financial data APIs that don't surface superinvestor-specific aggregations.

## Known failure modes

- Invalid limit parameter (outside 1-50 range) may return an error or default value
- Dataroma source unavailable or rate-limited causing upstream fetch failure
- Payment not confirmed resulting in 402 response and no charge
- Network timeout from the Cloudflare Workers endpoint

## How this service works

Dataroma superinvestor portfolios: manager and firm name, portfolio value, number of stocks and the top holdings' tickers, read from Dataroma's public manager table. Snapshot of the public page; not investment advice.

## Output

A list of superinvestor fund managers tracked on Dataroma, including their names and associated portfolio metadata, up to the requested limit (1-50, default 10).

## 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": [],
     "properties": {
      "limit": {
       "type": "string",
       "description": "How many managers, 1 to 50 (default 10)"
      }
     }
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/dataroma-superinvestors-portfolio-tracker-69cb3cb7/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.chainmarket-api.workers.dev](https://www.zero.xyz/host/api.chainmarket-api.workers.dev/llms.txt)