# Xynaptic Company Monitor

> Xynaptic Company Monitor is a paid API for AI agents from api.xynaptic.io, paid per call via x402, $0.05/call, status unknown (last checked 2026-10-02).

Monitors a French company (by SIREN) over time, detecting changes in officers, legal status, headquarters, activity codes, establishments, and financial accounts between successive calls.

## Facts

- Endpoint: GET https://api.xynaptic.io/v1/company-monitor?utm_source=zero.xyz
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/xynaptic-company-monitor-3c64f0dc
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_brmSdGzhbWRFqPkOhlYVA

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 xynaptic-company-monitor-3c64f0dc
```

Example prompt: Keep an eye on French company with SIREN 552032534 and let me know what has changed since the last time we checked — officers, status, headquarters, establishments, anything.

## When to prefer this

Choose this endpoint when you need ongoing temporal surveillance of a specific French company, not just a one-time lookup. It is purpose-built for change detection workflows — best used in scheduled polling agents that need to surface corporate events (leadership turnover, relocations, new filings) without manually diffing raw registry data. Prefer sibling endpoints like Xynaptic Company Financial for deep financial data or Xynaptic Company Relationship for inter-company links when change tracking is not required.

## Known failure modes

- Invalid or non-existent SIREN returns an error or empty result
- French registry data temporarily unavailable causes a service error
- First call returns baseline only with no changes (expected behavior)
- Rate limiting or payment failure if x402 payment not processed
- SIREN for a foreign (non-French) company not found in registry

## How this service works

Xynaptic Company Monitor — watch a French company over time: first call sets the baseline, next calls detect what changed (officers, status, HQ, activity, establishments, accounts). Parameters: ?siren=.

## Output

On the first call for a given SIREN, the endpoint establishes a baseline snapshot of the company's current state (officers, status, HQ address, activity/NAF code, establishments, filed accounts). On subsequent calls, it returns a structured delta report listing exactly what has changed since the baseline, including added/removed officers, status transitions, address changes, new or closed establishments, and newly filed annual accounts.

## 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",
     "additionalProperties": {
      "type": "string"
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/xynaptic-company-monitor-3c64f0dc/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.xynaptic.io](https://www.zero.xyz/host/api.xynaptic.io/llms.txt)