curl --request POST \
  --url https://api.lightspark.com/grid/2025-10-13/agents/{agentId}/external-accounts/{externalAccountId}/ach-validations \
  --header 'Authorization: Basic <encoded-value>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "method": "PLAID_AUTH",
  "ownerNameMatched": true,
  "validatedAt": "2026-10-09T17:55:00Z",
  "institutionName": "Chase"
}
'

const options = {
  method: 'POST',
  headers: {Authorization: 'Basic <encoded-value>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    method: 'PLAID_AUTH',
    ownerNameMatched: true,
    validatedAt: '2026-10-09T17:55:00Z',
    institutionName: 'Chase'
  })
};

fetch('https://api.lightspark.com/grid/2025-10-13/agents/{agentId}/external-accounts/{externalAccountId}/ach-validations', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

val client = OkHttpClient()

val mediaType = MediaType.parse("application/json")
val body = RequestBody.create(mediaType, "{\n  \"method\": \"PLAID_AUTH\",\n  \"ownerNameMatched\": true,\n  \"validatedAt\": \"2026-10-09T17:55:00Z\",\n  \"institutionName\": \"Chase\"\n}")
val request = Request.Builder()
  .url("https://api.lightspark.com/grid/2025-10-13/agents/{agentId}/external-accounts/{externalAccountId}/ach-validations")
  .post(body)
  .addHeader("Authorization", "Basic <encoded-value>")
  .addHeader("Content-Type", "application/json")
  .build()

val response = client.newCall(request).execute()

{
  "externalAccountId": "ExternalAccount:019542f5-b3e7-1d02-0000-000000000003",
  "method": "PLAID_AUTH",
  "validatedAt": "2026-10-09T17:55:00Z",
  "institutionName": "Chase"
}

{
  "code": "INVALID_INPUT",
  "reason": "<string>",
  "details": {
    "errors": [
      {
        "field": "identifier",
        "constraint": {
          "format": "email",
          "pattern": "^\\d{5}(-\\d{4})?$",
          "enum": [
            "SSN",
            "ITIN",
            "NON_US_TAX_ID"
          ],
          "minLength": 1,
          "maxLength": 500
        },
        "message": "Value is not one of the allowed enum members."
      }
    ],
    "missingRequirements": [
      "SUPPORTING_PROOF"
    ],
    "refusalReason": "AGENT_POLICY_DENIED",
    "missingFields": [
      "PHONE_NUMBER"
    ]
  }
}

{
  "code": "UNAUTHORIZED",
  "reason": "<string>",
  "details": {}
}

{
  "code": "FORBIDDEN",
  "reason": "<string>",
  "details": {
    "refusalReason": "AGENT_POLICY_DENIED",
    "permission": "ISSUE_CARDS",
    "policyDenialReason": "DAILY_LIMIT_EXCEEDED"
  }
}

{
  "code": "TRANSACTION_NOT_FOUND",
  "reason": "<string>",
  "details": {}
}

{
  "code": "GRID_SWITCH_ERROR",
  "reason": "<string>",
  "details": {}
}