# StableFinance Investor CIK Lookup

> StableFinance Investor CIK Lookup is a paid API for AI agents from stablefinance.dev, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-15).

Find the SEC CIK identifier for an institutional investor (13F filer) by searching with a name prefix.

## Facts

- Endpoint: GET https://stablefinance.dev/api/institutional-holdings/investors
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/stablefinance-dev-4482101f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ilqpmDvm8dBjbw5jnal05

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 stablefinance-dev-4482101f
```

Example prompt: Can you find the SEC CIK number for the institutional investor 'Bridgewater' — search by that name prefix so I can use it to pull their 13F holdings.

## When to prefer this

Use this endpoint when you have an investor or fund name and need to resolve it to a CIK before querying 13F institutional holdings, insider transactions, or SEC filings. It is the necessary first step in any workflow that requires a CIK as input, such as pivoting 13F positions by filer.

## Known failure modes

- No matching investors found for the given name prefix — empty investors array returned
- Name prefix too short or generic — returns too many results to be actionable
- Name misspelled or using informal name rather than SEC-registered legal name — no match found
- Missing required name parameter — request may fail or return unfiltered results
- Rate limit or payment failure — 402 payment required error

## How this service works

Find investor (filer) CIK by name prefix.

## Output

Returns a list of matching investors (filers) with their SEC CIK identifiers, filtered by the provided name prefix. The response contains an array of investor objects under the 'investors' key.

## Example request

```json
{
 "input": {
  "type": "http",
  "method": "GET",
  "queryParams": {
   "name": "Bridgewater"
  }
 }
}
```

## 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",
     "properties": {
      "name": {
       "type": "string",
       "minLength": 1
      }
     },
     "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": [
      "investors"
     ],
     "properties": {
      "investors": {
       "type": "array",
       "items": {}
      }
     },
     "additionalProperties": false
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "investors": [
   {
    "cik": "0001067983",
    "name": "BERKSHIRE HATHAWAY INC"
   }
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/stablefinance-dev-4482101f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from stablefinance.dev](https://www.zero.xyz/host/stablefinance.dev/llms.txt)