# 13F-HR Position Delta Analyzer

> 13F-HR Position Delta Analyzer is a paid API for AI agents from x402-deployer.x402-deployer.workers.dev, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-15).

Computes position changes between the two most recent 13F-HR filings for a given institutional investor CIK, returning added, exited, increased, and reduced positions with dollar deltas.

## Facts

- Endpoint: POST https://x402-deployer.x402-deployer.workers.dev/13f-deltas
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-deployer-x402-deployer-workers-dev-1985c7ff
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_DQqUrZXDi3bjUp-GtTt4y

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 x402-deployer-x402-deployer-workers-dev-1985c7ff -d '<json body>'
```

Example prompt: Pull up the 13F position deltas for institutional CIK 0001067983 — show me which positions were added, exited, increased, or reduced between their two most recent filings, with dollar deltas for each.

## When to prefer this

Use this endpoint when you need to quickly diff the two most recent 13F-HR filings for a specific institutional investor and get structured added/exited/increased/reduced position data with dollar deltas. Ideal for portfolio tracking, institutional sentiment analysis, or monitoring changes in fund holdings without parsing raw SEC EDGAR XML yourself.

## Known failure modes

- Invalid or unknown CIK returns a 404 or error indicating no filings found
- CIK with fewer than two 13F filings returns an error indicating insufficient filing history
- SEC EDGAR rate limiting or downtime may cause fetch failures
- Malformed CIK format returns a 400 validation error
- CIK exists but has no 13F-HR filings returns an appropriate not-found error

## How this service works

13F-HR position-delta computation — diff the two most recent 13F-HR filings for an institutional CIK. Returns added/exited/increased/reduced positions with dollar deltas.

## Output

Returns a structured breakdown of portfolio changes between the two most recent 13F-HR filings: lists of newly added positions, fully exited positions, increased positions, and reduced positions, each with associated dollar value deltas and holding details.

## 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",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "required": [
      "cik"
     ],
     "properties": {
      "cik": {
       "type": "string",
       "description": "Institutional manager's SEC CIK (e.g. '0001067983' for Berkshire Hathaway). Required — 13F filings are by CIK only, no ticker."
      },
      "limit_holdings": {
       "type": "number",
       "description": "Max positions to include in each bucket (added/exited/increased/reduced). 1-50. Default 20."
      },
      "min_change_usd": {
       "type": "number",
       "description": "Filter out moves smaller than this dollar magnitude. Default 0 (no filter)."
      }
     }
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "cik": {
       "type": "string"
      },
      "added": {
       "type": "array",
       "items": {
        "type": "object",
        "properties": {
         "cusip": {
          "type": "string"
         },
         "shares": {
          "type": "integer"
         },
         "ticker": {
          "type": "string"
         },
         "value_usd": {
          "type": "integer"
         }
        }
       }
      },
      "exited": {
       "type": "array",
       "items": {
        "type": "object",
        "properties": {
         "cusip": {
          "type": "string"
         },
         "ticker": {
          "type": "string"
         },
         "shares_previous": {
          "type": "integer"
         },
         "value_previous_usd": {
          "type": "integer"
         }
        }
       }
      },
      "source": {
       "type": "string"
      },
      "reduced": {
       "type": "array",
       "items": {
        "type": "object",
        "properties": {
         "cusip": {
          "type": "string"
         },
         "ticker": {
          "type": "string"
         },
         "pct_ch
… (truncated)
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-deployer-x402-deployer-workers-dev-1985c7ff/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-deployer.x402-deployer.workers.dev](https://www.zero.xyz/host/x402-deployer.x402-deployer.workers.dev/llms.txt)