# Signal Nodus Holdings

> Signal Nodus Holdings is a paid API for AI agents from api.signalnodus.ai, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-13).

Retrieves institutional investment holdings from SEC 13F filings for a specified fund manager, including position sizes and portfolio weights.

## Facts

- Endpoint: GET https://api.signalnodus.ai/v1/holdings
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/signal-nodus-holdings-ba6a6ca1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_9i1IlT71BdYtV8mlc7nlV

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 signal-nodus-holdings-ba6a6ca1
```

Example prompt: Pull up the SEC 13F holdings for Berkshire Hathaway — I want to see each issuer, the dollar value of each position, and what percentage of the portfolio it represents.

## When to prefer this

Choose this endpoint when you need structured, parsed 13F institutional holdings data tied to specific SEC accession numbers, with portfolio weights pre-calculated. It is preferable over raw EDGAR scraping when you need clean JSON output without parsing HTML or XBRL yourself, and when you want year-over-year diff context alongside point-in-time snapshot data.

## Known failure modes

- Unknown or misspelled manager name returns empty or error response
- Manager has not filed a 13F (not required for funds under $100M AUM)
- Filing data may lag SEC reporting deadlines by days or weeks
- Invalid CIK or accession number returns a 404 or empty dataset
- Rate limiting or payment failure returns a 402 response requiring USDC payment

## How this service works

Signal Nodus: year-over-year diffs of SEC filing sections, pinned to accession numbers. The diff is the product; raw data is the on-ramp.

## Output

A JSON object containing the fund manager's name, an array of holdings (each with issuer name, USD value, and portfolio percentage), and a count of distinct issuers in the filing.

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "manager": "BERKSHIRE HATHAWAY INC",
  "holdings": [
   {
    "issuer": "APPLE INC",
    "valueUsd": 60000000000,
    "pctOfPortfolio": 22.5
   }
  ],
  "distinctIssuers": 40
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/signal-nodus-holdings-ba6a6ca1/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.signalnodus.ai](https://www.zero.xyz/host/api.signalnodus.ai/llms.txt)