curl --request PUT \
  --url https://api.entendre.finance/v1/connections/{connection_id}/account-mappings/{ledger_account_id} \
  --header 'Content-Type: application/json' \
  --header 'X-API-Key: <api-key>' \
  --data '
{
  "external_id": "42"
}
'

const options = {
  method: 'PUT',
  headers: {'X-API-Key': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({external_id: '42'})
};

fetch('https://api.entendre.finance/v1/connections/{connection_id}/account-mappings/{ledger_account_id}', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://api.entendre.finance/v1/connections/{connection_id}/account-mappings/{ledger_account_id}"

payload = { "external_id": "42" }
headers = {
    "X-API-Key": "<api-key>",
    "Content-Type": "application/json"
}

response = requests.put(url, json=payload, headers=headers)

print(response.text)

{
  "data": {
    "id": "glm_507f1f77bcf86cd799439011",
    "organization_id": "org_507f1f77bcf86cd799439011",
    "integration_type": "quickbooks",
    "realm_id": "9341455734745729",
    "internal_ledger_account_id": "lac_507f1f77bcf86cd799439011",
    "external_ledger_account_id": "42",
    "created_at": "2026-08-22T12:40:37.874Z",
    "updated_at": "2026-08-31T03:49:29.365Z"
  }
}

{
  "error": {
    "code": "VALIDATION_ERROR",
    "message": "Invalid path, query or request body.",
    "request_id": "req_example"
  }
}

{
  "error": {
    "code": "UNAUTHORIZED",
    "message": "Authentication is required.",
    "request_id": "req_example"
  }
}

{
  "error": {
    "code": "FORBIDDEN",
    "message": "Insufficient access to organization",
    "request_id": "req_example"
  }
}

{
  "error": {
    "code": "RESOURCE_NOT_FOUND",
    "message": "Resource not found",
    "request_id": "req_example"
  }
}

{
  "error": {
    "code": "CONFLICT",
    "message": "The resource state does not allow this operation.",
    "request_id": "req_example"
  }
}

{
  "error": {
    "code": "RATE_LIMITED",
    "message": "Rate limit exceeded. Retry after 30s.",
    "request_id": "req_example"
  }
}

{
  "error": {
    "code": "INTERNAL_ERROR",
    "message": "Internal server error",
    "request_id": "req_example"
  }
}

{
  "error": {
    "code": "SERVICE_UNAVAILABLE",
    "message": "Service unavailable.",
    "request_id": "req_example"
  }
}