# AnswerPool Auditor Changes

> AnswerPool Auditor Changes is a paid API for AI agents from answerpool.io, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-14).

Lists SEC 8-K filings reporting auditor changes (Item 4.01) market-wide, providing company, timestamp, and filing links for accounting-risk monitoring.

## Facts

- Endpoint: GET https://answerpool.io/v1/sec/8k/auditor-change
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/answerpool-auditor-changes-2e547713
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_W51CRol78qo9AuxC0x70c

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-auditor-changes-2e547713
```

Example prompt: Pull the last 100 auditor-change 8-K filings from AnswerPool — anything filed since January 1, 2025 — so I can review which companies swapped auditors recently as part of my accounting risk screen.

## When to prefer this

Choose this endpoint when you need a ready-made, pre-filtered feed of auditor-change 8-K filings without having to parse the full EDGAR tape yourself. It is ideal for accounting risk monitoring, short-selling research, compliance pipelines, and portfolio surveillance where auditor turnover is a red flag signal. Prefer it over full-text EDGAR search when you specifically want Item 4.01 events and want company metadata and links pre-joined.

## Known failure modes

- Invalid 'since' datetime format returns a 400 error
- Limit exceeding maximum of 200 returns a validation error
- No events in the requested window returns an empty events array with count 0
- Payment not received (402) when x402 payment header is missing or insufficient
- Network timeout on large result sets near the 200-item limit

## 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

Returns a JSON object with a list of auditor-change events, each containing event ID, accession number, CIK, ticker, company name, form type, event type, occurred_at timestamp, flags, a risk score, a payload with filing details, and a direct filing URL. Also includes metadata: as_of timestamp, since cursor, count, and index_started_at.

## 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": "WindowIn",
     "properties": {
      "limit": {
       "type": "integer",
       "title": "Limit",
       "default": 50,
       "maximum": 200,
       "minimum": 1,
       "description": "Maximum 8-K events of this view's event type returned, newest first; 1 to 200, default 50."
      },
      "since": {
       "anyOf": [
        {
         "type": "string",
         "maxLength": 32
        },
        {
         "type": "null"
        }
       ],
       "title": "Since",
       "default": null,
       "description": "Earliest event time, ISO 8601 date or timestamp (e.g. 2026-08-01 or 2026-08-01T00:00:00Z); UTC if no offset, capped at 90 days back. Omit for this view's own default window of 7 to 30 recent days."
      }
     },
     "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": 0,
  "since": "2026-08-01T00:00:00",
  "events": [],
  "next_cursor": "2026-08-01T00:00:00",
  "index_started_at": "2026-08-27T00:00:00Z"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/answerpool-auditor-changes-2e547713/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)