# CompanyFacts Company Changes API

> CompanyFacts Company Changes API is a paid API for AI agents from companyfacts.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-31).

Returns a time-windowed changelog of events detected for a company — job openings/closings, technology stack changes, and contact/address updates — sourced from live ATS boards and web crawls.

## Facts

- Endpoint: GET https://companyfacts.dev/x402/v1/company-changes?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/companyfacts-company-changes-api-9d6f607f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_bvUlsVi05MLzDG0ncmXUB

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 companyfacts-company-changes-api-9d6f607f
```

Example prompt: Pull all changes detected for example-dental.com from November 1 to November 30, 2026 — I want to see any new job openings, tech stack additions, and address changes.

## When to prefer this

Choose this endpoint when you need a structured, time-windowed audit trail of what has changed at a specific company — including job openings sourced directly from ATS platforms (Greenhouse, Ashby, Lever, Workable), technology stack shifts, and contact/address updates — rather than a static snapshot. Prefer it over generic job board scraping when you need event-level change history with before/after values and source attribution, or when you need to monitor multiple company signals (hiring + tech + contacts) in a single call.

## Known failure modes

- Unknown domain — company not in the 8532-company directory returns empty or null subject
- Date range too broad — no events found for the specified window returns count 0 and empty events array
- Invalid query parameters — unrecognized 'parts' filter value may return error or ignored filter
- Company not yet tracked — newly added domains may have no baseline history, returning empty changelog
- Rate or payment failure — x402 payment not processed results in 402 response with no data

## How this service works

Open job postings read first-hand from the applicant-tracking system behind a company's careers page: Greenhouse, Ashby, Lever or Workable. Includes a directory of 8532 company job boards, because none of the vendors publishes one. Salaries are parsed into numbers where the employer publishes them and refused where ambiguous. No personal data.

## Output

A JSON object with a count of events, a list of timestamped change events (each with item type, kind of change, before/after values, and source URL), the subject company identifiers, per-part tracking metadata (tech, hiring, contacts), and a flag indicating whether more events are available beyond the returned window.

## 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",
     "required": [],
     "properties": {
      "limit": {
       "type": "string"
      },
      "parts": {
       "type": "string"
      },
      "since": {
       "type": "string"
      },
      "state": {
       "type": "string"
      },
      "until": {
       "type": "string"
      },
      "domain": {
       "type": "string"
      },
      "company": {
       "type": "string"
      },
      "entity_number": {
       "type": "string"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "count": 3,
  "notes": [
   "Changes come only from our own records."
  ],
  "since": "2026-11-01",
  "until": "2026-11-30",
  "events": [
   {
    "day": "2026-11-30",
    "item": "address",
    "kind": "changed",
    "part": "contacts",
    "after": "250 Oak Ave, Austin, TX 78704, US",
    "before": "100 Main St, Austin, TX 78701, US",
    "source_url": "https://example-dental.com/contact"
   },
   {
    "day": "2026-11-30",
    "item": "technology",
    "kind": "added",
    "part": "tech",
    "after": "HubSpot",
    "before": "",
    "source_url": "https://example-dental.com/"
   },
   {
    "day": "2026-11-12",
    "job": {
     "board": "exampledental",
     "title": "Dental Hygienist",
     "job_id": "123",
     "location": "Austin, TX",
     "department": "Clinical"
    },
    "item": "job",
    "kind": "opened",
    "part": "hiring",
    "after": "",
    "before": "",
    "detail": null,
    "source_url": "https://boards.greenhouse.io/exampledental/jobs/123"
   }
  ],
  "subject": {
   "domain": "example-dental.com",
   "company": null,
   "register": null
  },
  "tracking": {
   "tech": {
    "baseline": false,
    "read_now": true,
    "last_read": "2026-11-30T09:00:00.000Z",
    "next_read": "2026-12-30",
    "tracked_since": "2026-10-31",
    "changes_found_now": 1
   },
   "hiring": {
    "boards": [
     "exampledental"
    ],
    "tracked": true,
    "latest_day": "2026-11-30",
    "history_starts": "2026-10-31"
   },
   "contacts": {
    "baseline": false,
    "read_now": true,
    "last_read": "2026-11-30T09:00:00.000Z",
    "next_read": "2026-12-30",
    "tracked_since": "2026-10-31",
    "changes_found_now": 1
   }
  },
  "more_available": false
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/companyfacts-company-changes-api-9d6f607f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from companyfacts.dev](https://www.zero.xyz/host/companyfacts.dev/llms.txt)