# Xynaptic Company Changes

> Xynaptic Company Changes is a paid API for AI agents from api.xynaptic.io, paid per call via x402, $0.03/call, status unknown (last checked 2026-10-02).

Returns a diff of recent changes in a French company (officers, status, HQ, activity, accounts) compared to the last snapshot, identified by SIREN number.

## Facts

- Endpoint: GET https://api.xynaptic.io/v1/company-changes?utm_source=zero.xyz
- Price: $0.03/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-changes-f1d826a2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_s9eYHfUSkRbUbpcthoxjY

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-changes-f1d826a2
```

Example prompt: Can you check what has recently changed at the French company with SIREN 552032534 — I want to know if there have been any officer changes, address moves, or status updates since the last snapshot.

## When to prefer this

Use this endpoint when you need to detect recent changes to a French company's official registered data — especially for due diligence, compliance monitoring, or competitive intelligence workflows. It is specifically designed as a change-detection diff against a snapshot, making it more efficient than fetching full company profiles when you only care about what is new or different. Prefer it over static company lookup endpoints when the goal is monitoring or alerting on mutations.

## Known failure modes

- Invalid or non-existent SIREN returns an error or empty result
- No changes detected since last snapshot returns an empty diff
- Rate limiting or payment failure (x402) if USDC balance is insufficient
- Malformed SIREN parameter (not 9 digits) may return a validation error
- Company not covered in the registry snapshot may yield no data

## How this service works

Xynaptic Company Changes — what recently changed in a French company: officers, status, HQ, activity, accounts — detected against the last snapshot (shared with company-monitor). Parameter: ?siren=.

## Output

A structured diff showing what has changed since the last snapshot for the specified French company, potentially including new or removed officers, changes in legal status, headquarters address updates, NAF/activity code changes, and shifts in annual account data.

## 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-changes-f1d826a2/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)