I’ve been getting the same error for days now, and even after waiting as specified, the request fails. It doesn’t show any sign of exceeding the quota in Google Cloud Console, either.

GaxiosError: User-rate limit exceeded.  Retry after 2024-06-20T19:51:37.198Z
    at Gaxios._request (/Users/gsquare567/Sites/test/node_modules/gaxios/src/gaxios.ts:146:15)
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
    at async OAuth2Client.requestAsync (/Users/gsquare567/Sites/test/node_modules/google-auth-library/build/src/auth/oauth2client.js:408:18)
    at loadEmail (/Users/gsquare567/Sites/test/server/utils/gmail.ts:763:30)
    at runOperation (/Users/gsquare567/Sites/test/server/utils/google.ts:254:20)
    at runGmailOperation (/Users/gsquare567/Sites/test/server/utils/gmail.ts:184:5)
    at main (/Users/gsquare567/Sites/test/server/scripts/write-email-test.ts:13:27)
    at <anonymous> (/Users/gsquare567/Sites/test/server/scripts/write-email-test.ts:38:3) {
  config: {
    url: 'https://gmail.googleapis.com/gmail/v1/users/me/messages/1902cf0fc5523629',
    method: 'GET',
    apiVersion: '',
    userAgentDirectives: [
      {
        product: 'google-api-nodejs-client',
        version: '7.2.0',
        comment: 'gzip'
      }
    ],
    paramsSerializer: [Function (anonymous)],
    headers: {
      'x-goog-api-client': 'gdcl/7.2.0 gl-node/20.14.0',
      'Accept-Encoding': 'gzip',
      'User-Agent': 'google-api-nodejs-client/7.2.0 (gzip)',
      Authorization: '<<REDACTED> - See `errorRedactor` option in `gaxios` for configuration>.'
    },
    params: {},
    validateStatus: [Function (anonymous)],
    retry: true,
    responseType: 'unknown',
    errorRedactor: [Function: defaultErrorRedactor],
    retryConfig: {
      currentRetryAttempt: 3,
      retry: 3,
      httpMethodsToRetry: [ 'GET', 'HEAD', 'PUT', 'OPTIONS', 'DELETE' ],
      noResponseRetries: 2,
      statusCodesToRetry: [ [ 100, 199 ], [ 408, 408 ], [ 429, 429 ], [ 500, 599 ] ]
    }
  },
  response: {
    config: {
      url: 'https://gmail.googleapis.com/gmail/v1/users/me/messages/1902cf0fc5523629',
      method: 'GET',
      apiVersion: '',
      userAgentDirectives: [
        {
          product: 'google-api-nodejs-client',
          version: '7.2.0',
          comment: 'gzip'
        }
      ],
      paramsSerializer: [Function (anonymous)],
      headers: {
        'x-goog-api-client': 'gdcl/7.2.0 gl-node/20.14.0',
        'Accept-Encoding': 'gzip',
        'User-Agent': 'google-api-nodejs-client/7.2.0 (gzip)',
        Authorization: '<<REDACTED> - See `errorRedactor` option in `gaxios` for configuration>.'
      },
      params: {},
      validateStatus: [Function (anonymous)],
      retry: true,
      responseType: 'unknown',
      errorRedactor: [Function: defaultErrorRedactor],
      retryConfig: {
        currentRetryAttempt: 3,
        retry: 3,
        httpMethodsToRetry: [ 'GET', 'HEAD', 'PUT', 'OPTIONS', 'DELETE' ],
        noResponseRetries: 2,
        statusCodesToRetry: [ [ 100, 199 ], [ 408, 408 ], [ 429, 429 ], [ 500, 599 ] ]
      }
    },
    data: {
      error: {
        code: 429,
        message: 'User-rate limit exceeded.  Retry after 2024-06-20T19:51:37.198Z',
        errors: [
          {
            message: 'User-rate limit exceeded.  Retry after 2024-06-20T19:51:37.198Z',
            domain: 'global',
            reason: 'rateLimitExceeded'
          }
        ],
        status: 'RESOURCE_EXHAUSTED'
      }
    },
    headers: {
      'alt-svc': 'h3=":443"; ma=2592000,h3-29=":443"; ma=2592000',
      'cache-control': 'private',
      'content-encoding': 'gzip',
      'content-type': 'application/json; charset=UTF-8',
      date: 'Thu, 20 Jun 2024 19:39:58 GMT',
      server: 'ESF',
      'transfer-encoding': 'chunked',
      vary: 'Origin, X-Origin, Referer',
      'x-content-type-options': 'nosniff',
      'x-frame-options': 'SAMEORIGIN',
      'x-xss-protection': '0'
    },
    status: 429,
    statusText: 'Too Many Requests',
    request: {
      responseURL: 'https://gmail.googleapis.com/gmail/v1/users/me/messages/1902cf0fc5523629'
    }
  },
  error: undefined,
  status: 429,
  code: 429,
  errors: [
    {
      message: 'User-rate limit exceeded.  Retry after 2024-06-20T19:51:37.198Z',
      domain: 'global',
      reason: 'rateLimitExceeded'
    }
  ],
  [Symbol(gaxios-gaxios-error)]: '6.6.0'
}