# AnswerPool Insider Buy Clusters

> AnswerPool Insider Buy Clusters is a paid API for AI agents from answerpool.io, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-14).

Returns a list of issuers where 3 or more distinct officers or directors bought shares within a rolling window, with combined buy USD, insider count, and names per issuer.

## Facts

- Endpoint: GET https://answerpool.io/v1/sec/insider/clusters
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/answerpool-insider-buy-clusters-a40b63ec
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_oqNwnpQOlfOINoWgB9KoN

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-insider-buy-clusters-a40b63ec
```

Example prompt: Pull the latest insider buy clusters from SEC filings — show me all issuers where at least 3 distinct insiders bought within the past 7 days, with their names and combined dollar amounts.

## When to prefer this

Choose this endpoint when you need a pre-computed, market-wide signal of coordinated insider buying — specifically when you want companies where multiple distinct insiders bought within a short window, without having to aggregate raw transactions yourself. It is the only single-call API that delivers this cluster-level aggregation. Prefer it over the raw insider screen endpoint when conviction level (number of distinct buyers) matters more than individual transaction details.

## Known failure modes

- No clusters found for the given parameters returns an empty clusters array with count 0
- Invalid days value outside 1-30 range returns a validation error
- Invalid min_insiders value outside 2-10 range returns a validation error
- Stale or delayed SEC EDGAR ingestion may cause recent filings to be missing from results
- Rate limiting or payment failure returns a 402 response requiring USDC payment

## 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 the as_of timestamp, the window in days, and an array of cluster records. Each record includes the issuer's CIK, ticker, company name, number of distinct insiders who bought, their names, combined buy USD, number of filings, and the timestamp of the most recent filing.

## 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": "ClustersIn",
     "properties": {
      "days": {
       "type": "integer",
       "title": "Days",
       "default": 7,
       "maximum": 30,
       "minimum": 1,
       "description": "Length of the lookback window in days, counted back from now; 1 to 30, default 7."
      },
      "min_insiders": {
       "type": "integer",
       "title": "Min Insiders",
       "default": 3,
       "maximum": 10,
       "minimum": 2,
       "description": "Minimum number of distinct insiders buying the same issuer inside the window for it to be reported as a cluster; 2 to 10, default 3."
      }
     },
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "as_of": "2026-08-31T14:00:00Z",
  "count": 1,
  "clusters": [
   {
    "cik": "0000096223",
    "ticker": "JEF",
    "buy_usd": 4500000,
    "company": "JEFFERIES FINANCIAL GROUP INC.",
    "filings": 3,
    "insiders": 3,
    "latest_at": "2026-08-28T21:53:58",
    "insider_names": [
     "FRIEDMAN BRIAN P",
     "HANDLER RICHARD B",
     "OSBORNE MATT"
    ]
   }
  ],
  "window_days": 7,
  "index_started_at": "2026-08-27T00:00:00Z"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/answerpool-insider-buy-clusters-a40b63ec/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)