# x402stock Fund Holdings by CIK (13F SEC Filing)

> x402stock Fund Holdings by CIK (13F SEC Filing) is a paid API for AI agents from x402stock.xyz, paid per call via x402, $0.03/call, status unknown (last checked 2026-09-08).

Retrieves the latest 13F institutional fund holdings for a given SEC filer identified by CIK number, including all portfolio positions, values, and voting details.

## Facts

- Endpoint: GET https://x402stock.xyz/api/v1/fund-holdings/%7Bcik%7D
- Price: $0.03/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-08
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402stock-fund-holdings-by-cik-13f-sec-filing-49c801ed
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_QUUhwv6cgOZyFjD-61KF-

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 x402stock-fund-holdings-by-cik-13f-sec-filing-49c801ed
```

Example prompt: Pull the latest 13F SEC fund holdings for Berkshire Hathaway — their CIK is 0001067983 — and show me up to 50 positions including issuer names, share counts, and market values.

## When to prefer this

Use this endpoint when you need structured 13F institutional holdings data for a specific SEC filer identified by CIK, especially when you want pay-per-call access without API key setup. Prefer over direct SEC EDGAR scraping when you need clean, parsed JSON output with voting and discretion breakdowns already structured.

## Known failure modes

- Invalid or unknown CIK returns 404 or empty result
- CIK with no 13F filings on record returns no data
- Limit parameter out of range (<=0 or >1000) returns validation error
- Payment failure via x402/USDC results in 402 response before data is returned
- SEC EDGAR upstream outage may cause delayed or failed responses

## How this service works

Pay-per-call market and economic data API for AI agents: US stocks, ETFs and options, forex, crypto and on-chain perps, energy commodities, US and global macro (Fed, CPI, jobs, GDP, Treasury, World Bank), SEC filings, congressional trades, and market sentiment. No API keys, no accounts. Pay per request in USDC via x402 on Base.

## Output

Returns the most recent 13F filing for the specified CIK, including filer name, filing date, report date, accession number, total portfolio value, total number of positions, and an array of individual holdings each with issuer name, CUSIP, share count, market value, share type, put/call indicator, investment discretion classification, and voting authority breakdown (sole, shared, none).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "$schema": "https://json-schema.org/draft/2020-12/schema",
     "required": [
      "limit"
     ],
     "properties": {
      "limit": {
       "type": "integer",
       "default": 100,
       "maximum": 1000,
       "exclusiveMinimum": 0
      }
     },
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "$schema": "https://json-schema.org/draft/2020-12/schema",
     "required": [
      "cik",
      "filer",
      "source",
      "as_of",
      "data"
     ],
     "properties": {
      "cik": {
       "type": "string"
      },
      "data": {
       "type": "object",
       "required": [
        "form",
        "accession",
        "filing_date",
        "report_date",
        "total_positions",
        "total_value",
        "count",
        "holdings"
       ],
       "properties": {
        "form": {
         "type": "string"
        },
        "count": {
         "type": "number"
        },
        "holdings": {
         "type": "array",
         "items": {
          "type": "object",
          "required": [
           "issuer",
           "title_of_class",
           "cusip",
           "value",
           "shares",
           "shares_type",
           "put_call",
           "investment_discretion",
           "voting_sole",
           "voting_shared",
           "voting_none"
          ],
          "properties": {
           "cusip": {
            "anyOf": [
             {
              "type": "string"
             },
             {
              "type": "null"
             }
            ]
           },
           "value": {
            "anyOf": [
             {
              "type": "number"
             },
             {
              "type": "null"
             }
            ]
           },
           "issuer": {
            "anyOf": [
             {
              "type": "string"
             },
… (truncated)
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "cik": "0001067983",
  "data": {
   "form": "13F-HR",
   "count": 1,
   "holdings": [
    {
     "cusip": "037833100",
     "value": 75000000000,
     "issuer": "APPLE INC",
     "shares": 300000000,
     "put_call": null,
     "shares_type": "SH",
     "voting_none": 0,
     "voting_sole": 300000000,
     "voting_shared": 0,
     "title_of_class": "COM",
     "investment_discretion": "DFND"
    }
   ],
   "accession": "0000950123-26-005678",
   "filing_date": "2026-05-15",
   "report_date": "2026-03-31",
   "total_value": 299000000000,
   "total_positions": 42
  },
  "as_of": "2026-05-15T00:00:00.000Z",
  "filer": "BERKSHIRE HATHAWAY INC",
  "source": "sec_edgar"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402stock-fund-holdings-by-cik-13f-sec-filing-49c801ed/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402stock.xyz](https://www.zero.xyz/host/x402stock.xyz/llms.txt)