# AnswerPool 13F Crowding

> AnswerPool 13F Crowding is a paid API for AI agents from answerpool.io, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-15).

Returns a multi-quarter trend of institutional 13F holder counts, share totals, and AUM for a named issuer, with entering/exiting manager lists and a directional trend label.

## Facts

- Endpoint: GET https://answerpool.io/v1/sec/13f/crowding
- 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/answerpool-13f-crowding-2bd4d5ad
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_TLGBx0iph5aHT-DOwYwt5

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 answerpool-13f-crowding-2bd4d5ad
```

Example prompt: Show me the institutional 13F crowding trend for NVIDIA over the last 8 quarters — how many fund managers hold it, whether that number is growing, and which new managers entered most recently.

## When to prefer this

Use this endpoint when you need a longitudinal, multi-quarter view of institutional 13F ownership breadth for a specific public company — including holder counts, aggregate share totals, AUM, and manager entry/exit signals — all derived from SEC EDGAR and returned as structured JSON in a single call. Prefer this over raw EDGAR queries when you need deduplication of amendments, trend labeling, and new/exited manager lists pre-computed. Not suitable for real-time ownership data (13F has a ~45-day lag) or for tracking ownership below the $100M manager threshold.

## Known failure modes

- Issuer prefix matches no 13F filers — returns error indicating no recorded holdings for that prefix
- Quarters parameter exceeds indexed history — silently capped to available data
- Ambiguous issuer prefix matches multiple entities — may return unexpected issuer
- Rate limit or payment failure for paid tier — 402 response requiring credit or USDC payment
- Misspelled or non-standard issuer name format returns empty or mismatched result

## How this service works

AnswerPool turns SEC EDGAR, the Federal Register, USAspending, NIH, BLS and OpenAlex into structured JSON answers that AI agents and developers fetch in one call. 69 endpoints free, no account; derived analyses $0.02–$0.05 per call by card credits or USDC (x402). MCP server, full provenance.

## Output

A JSON object containing a time series of quarterly snapshots (period, holder count, total shares, total USD value, quarter-over-quarter changes), a trend label ('building', 'unwinding', etc.), the matched issuer name, lists of newly entering and exiting managers for the most recent period, and a data provenance note with disclaimer. Covers only managers above the $100M SEC threshold with a ~45-day filing lag.

## 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",
     "title": "CrowdingIn",
     "required": [
      "issuer"
     ],
     "properties": {
      "issuer": {
       "type": "string",
       "title": "Issuer",
       "maxLength": 80,
       "minLength": 2,
       "description": "Issuer name prefix exactly as managers file it, case-insensitive (e.g. NVIDIA). A prefix with no recorded 13F holdings is an error."
      },
      "quarters": {
       "type": "integer",
       "title": "Quarters",
       "default": 6,
       "maximum": 12,
       "minimum": 2,
       "description": "How many of the most recent 13F report periods (calendar quarter ends) to trend over. Default 6; silently capped by the quarters currently indexed."
      }
     },
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "note": "Holder counts deduplicate amendments to one filing per manager per quarter. 13F is quarterly with the SEC's ~45-day lag, and covers only managers above the $100M threshold, so this is institutional breadth, not total ownership.",
  "as_of": "2026-09-03T15:30:00Z",
  "trend": "building",
  "series": [
   {
    "period": "2025-12-31",
    "holders": 412,
    "total_shares": 640000000,
    "holders_change": null,
    "total_value_usd": 91200000000,
    "value_change_pct": null
   },
   {
    "period": "2026-03-31",
    "holders": 437,
    "total_shares": 662000000,
    "holders_change": 25,
    "total_value_usd": 99400000000,
    "value_change_pct": 8.99
   }
  ],
  "disclaimer": "From SEC Form 13F filings (public domain), reported quarterly with a filing lag; not investment advice.",
  "issuer_query": "NVIDIA",
  "new_managers": [
   "Ramiah Capital Group"
  ],
  "issuer_matched": "NVIDIA CORP",
  "exited_managers": [],
  "periods_covered": 2
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/answerpool-13f-crowding-2bd4d5ad/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from answerpool.io](https://www.zero.xyz/host/answerpool.io/llms.txt)