# AnswerPool Auditor Network

> AnswerPool Auditor Network is a paid API for AI agents from answerpool.io, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-13).

Returns all public companies that name a given audit firm in their 10-K annual reports, with filing counts and dates, enabling auditor concentration and shared-auditor network analysis.

## Facts

- Endpoint: GET https://answerpool.io/v1/graph/auditor
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/answerpool-auditor-network-b4db40b1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_w3Z5nrqjD29SVhJGUo414

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-network-b4db40b1
```

Example prompt: Which public companies named 'Ernst & Young LLP' as their auditor in annual 10-K filings over the last 400 days? Give me up to 50 results with filing counts and the most recent filing dates.

## When to prefer this

Use this endpoint when you need to identify which SEC-registered public companies are audited by a specific firm, based on full-text search of 10-K filings on EDGAR. Prefer this over generic EDGAR search when you want structured, aggregated results per registrant with filing counts, or when you need to map auditor concentration or shared-auditor networks in a single call. Best suited for financial research, governance analysis, audit market studies, or due diligence workflows.

## Known failure modes

- Audit firm name too short (< 3 characters) returns validation error
- Name not found in any filing returns empty companies array with count 0
- lookback_days outside 30–1825 range returns parameter validation error
- limit outside 1–100 range returns validation error
- False positives possible: auditor name mentioned in non-auditor contexts (predecessor auditor, litigation references) as noted in response disclaimer

## 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 the queried auditor name, an as-of timestamp, total filing matches, a count of matched companies, and an array of company records each containing the CIK, company name, number of filings matched, form types (e.g. 10-K), the latest filing date, and matched text snippets. Includes a disclaimer note about text-mention proxy methodology.

## 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": "AuditorIn",
     "required": [
      "name"
     ],
     "properties": {
      "name": {
       "type": "string",
       "title": "Name",
       "maxLength": 80,
       "minLength": 3,
       "description": "Audit firm, e.g. \"Ernst & Young LLP\"."
      },
      "limit": {
       "type": "integer",
       "title": "Limit",
       "default": 25,
       "maximum": 100,
       "minimum": 1,
       "description": "Maximum client companies returned, ordered by matching filing count descending then CIK. Default 25."
      },
      "lookback_days": {
       "type": "integer",
       "title": "Lookback Days",
       "default": 400,
       "maximum": 1825,
       "minimum": 30,
       "description": "Window in days over the 10-K filing date, counted back from today. Default 400, about one annual reporting cycle."
      }
     },
     "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": "2026-09-02T22:00:00Z",
  "count": 1,
  "auditor": "Deloitte",
  "companies": [
   {
    "cik": "0000320193",
    "forms": [
     "10-K"
    ],
    "company": "Apple Inc.",
    "filings": 1,
    "matched": [
     "Deloitte"
    ],
    "latest_filed": "2025-11-01"
   }
  ],
  "total_filing_matches": 812
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/answerpool-auditor-network-b4db40b1/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)