`company.shareholders.taxNumber`

Save or remove a shareholder's tax number for Schedule 50 and T5 slips: { holderId, kind (sin, bn with an optional program account, itn, or foreign with country), value, country? } or value null to remove it. SINs are checked with their check digit. The number is stored encrypted and only ever returned masked; it is never logged or audited.

POST/api/v1/accounting/company.shareholders.taxNumber

Permissions

accounting:readaccounting:writeaccounting:admin

Who can call it

admin

Retries

No idempotency key

MCP

accounting_company_shareholders_tax_number

Fields

holderIdstringRequired
Matches ^[a-z0-9][a-z0-9-]{7,39}$
kindenum
Which kind of record or job this is.
sinbnitnforeign
valuestring or nullRequired
countrystring
exactly 2 characters

curl https://app.getoatmilk.com/api/v1/accounting/company.shareholders.taxNumber \
  -H "Authorization: Bearer $OATMILK_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "holderId": "aaaaaaaa",
  "value": "example",
  "kind": "sin"
}'

const response = await fetch("https://app.getoatmilk.com/api/v1/accounting/company.shareholders.taxNumber", {
  method: "POST",
  headers: {
    Authorization: `Bearer ${process.env.OATMILK_API_KEY}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    "holderId": "aaaaaaaa",
    "value": "example",
    "kind": "sin"
  }),
});
const { data, error } = await response.json();
if (!response.ok) throw new Error(`${error.code}: ${error.message}`);
console.log(data);

import os

import requests

response = requests.post(
    "https://app.getoatmilk.com/api/v1/accounting/company.shareholders.taxNumber",
    headers={
        "Authorization": f"Bearer {os.environ['OATMILK_API_KEY']}",
    },
    json={
        "holderId": "aaaaaaaa",
        "value": "example",
        "kind": "sin",
    },
    timeout=30,
)
payload = response.json()
if not response.ok:
    raise RuntimeError(f"{payload['error']['code']}: {payload['error']['message']}")
print(payload["data"])

Response

{
  "data": { … }
}

Try it

Checks your input with this action’s real schema and answers like the API, with synthetic data. No key needed, and nothing changes.

Input

POST/api/v1/accounting/company.shareholders.taxNumber

curl https://app.getoatmilk.com/api/v1/accounting/company.shareholders.taxNumber \
  -H "Authorization: Bearer $OATMILK_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "holderId": "aaaaaaaa",
  "value": "example",
  "kind": "sin"
}'

const response = await fetch("https://app.getoatmilk.com/api/v1/accounting/company.shareholders.taxNumber", {
  method: "POST",
  headers: {
    Authorization: `Bearer ${process.env.OATMILK_API_KEY}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    "holderId": "aaaaaaaa",
    "value": "example",
    "kind": "sin"
  }),
});
const { data, error } = await response.json();
if (!response.ok) throw new Error(`${error.code}: ${error.message}`);
console.log(data);

import os

import requests

response = requests.post(
    "https://app.getoatmilk.com/api/v1/accounting/company.shareholders.taxNumber",
    headers={
        "Authorization": f"Bearer {os.environ['OATMILK_API_KEY']}",
    },
    json={
        "holderId": "aaaaaaaa",
        "value": "example",
        "kind": "sin",
    },
    timeout=30,
)
payload = response.json()
if not response.ok:
    raise RuntimeError(f"{payload['error']['code']}: {payload['error']['message']}")
print(payload["data"])

Fields

Example

Try it