Workflow Node giving 401 error. Not able to run reddit scrape

Questions
1

Describe the problem/error/question

I am getting an authentication error while trying to run my workflow which reads Reddit.

What is the error message (if any)?

The 401 error generally indicates an issue with the authentication credentials or permissions.

Please share your workflow

Screenshot 2026-06-16 at 2.27.14 PM
Screenshot 2026-06-16 at 2.27.14 PM3023×1725 466 KB

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            "node": "Format comments",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Get all comments1": {
      "main": [
        [
          {
            "node": "Format comments1",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Format posts1": {
      "main": [
        [
          {
            "node": "Merge",
            "type": "main",
            "index": 3
          }
        ]
      ]
    },
    "Get all comments2": {
      "main": [
        [
          {
            "node": "Format comments2",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Format comments2": {
      "main": [
        [
          {
            "node": "Merge",
            "type": "main",
            "index": 4
          }
        ]
      ]
    },
    "Format posts2": {
      "main": [
        [
          {
            "node": "Merge",
            "type": "main",
            "index": 5
          }
        ]
      ]
    },
    "When clicking ‘Execute workflow’": {
      "main": [
        [
          {
            "node": "Search \"drinkaid\" on r/askSingapore",
            "type": "main",
            "index": 0
          },
          {
            "node": "Search \"hangover\"on askSingapore",
            "type": "main",
            "index": 0
          },
          {
            "node": "Search \"supplements\"on askSingapore",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Search \"drinkaid\" on r/askSingapore": {
      "main": [
        [
          {
            "node": "Get all comments",
            "type": "main",
            "index": 0
          },
          {
            "node": "Format posts",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Search \"hangover\"on askSingapore": {
      "main": [
        [
          {
            "node": "Get all comments1",
            "type": "main",
            "index": 0
          },
          {
            "node": "Format posts1",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Search \"supplements\"on askSingapore": {
      "main": [
        [
          {
            "node": "Get all comments2",
            "type": "main",
            "index": 0
          },
          {
            "node": "Format posts2",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Format comments1": {
      "main": [
        [
          {
            "node": "Merge",
            "type": "main",
            "index": 2
          }
        ]
      ]
    }
  },
  "pinData": {},
  "meta": {
    "instanceId": "402b321fc1c49325a9502139f8d65de0ed691e3306356f78da9f147947f951a1"
  }
}

(Select the nodes on your canvas and use the keyboard shortcuts CMD+C/CTRL+C and CMD+V/CTRL+V to copy and paste the workflow.)

Share the output returned by the last node

Information on your n8n setup

  • n8n version:
  • Database (default: SQLite):
  • n8n EXECUTIONS_PROCESS setting (default: own, main): own
  • Running n8n via (Docker, npm, n8n cloud, desktop app): n8n
  • Operating system: MAC
2

Hi @senosaha, that 401 is the Reddit OAuth2 credential being rejected, not your workflow logic. The search node is just the first node that talks to Reddit, so it’s where bad auth shows up first.

Open the credential itself (Credentials > “Reddit account”) and hit Reconnect: does it go green, or does the reconnect also error out? And when you set up the app at Reddit - Please wait for verification, is it type “web app”?

3

Hi @senosaha

To add on what achamm has mentioned:-

  • Log into the Reddit account manually in a browser to ensure the account isn’t suspended or flagged for “too many requests,” which can sometimes trigger auth errors.
  • Ensure the account has the necessary permissions to access the subreddits you are searching (though most are public, some private ones require specific auth).
4

Screenshot 2026-06-16 at 2.42.40 PM
Screenshot 2026-06-16 at 2.42.40 PM2194×759 60.8 KB
the account is connected. but when i try to reconnect, it redirects me to reddit website and says bad request. The reddit account is active, has necessary permissions to access subreddits (all are public)

Screenshot 2026-06-16 at 2.46.36 PM
Screenshot 2026-06-16 at 2.46.36 PM3024×1964 316 KB

5

@senosaha that second screenshot is the tell. Reddit says “invalid client id”, so it’s not the token or permissions, the Client ID n8n is sending doesn’t match a live app on your account.

At Reddit - Please wait for verification (logged in as the account that owns the app):

  1. Confirm the app is type “web app” with its redirect uri set exactly to https://oauth.n8n.cloud/oauth2/callback (the URL in your credential).
  2. The Client ID is the short string just under the app name, top-left, not the secret. Paste that exact value into n8n’s Client ID field, then Save and Reconnect.

The green “Account connected” is just a stale token, which is why it still 401s.

6

A 401 on the Reddit node is the OAuth2 credential being rejected, not your workflow logic, the search node is just the first thing that talks to Reddit so that is where bad auth surfaces. Open the credential itself (Credentials, your Reddit account) and hit Reconnect: if the reconnect also errors, the problem is in the app setup on Reddit’s side, not n8n. Common causes: the Reddit app is the wrong type (it needs to be a “script” or “web app” depending on your flow), the redirect URI registered on Reddit does not exactly match the one n8n shows, or the token expired and the refresh is failing. Reconnect first and tell us whether that step goes green or throws, that splits it in half.

7

@senosaha

Were you able to fix this? Running into the same issue right now. Everything was working fine until a day ago.

8

It seems like Reddit is revoking Apps. I had mine removed, and it no longer shows under /prefs/apps and I get the same “Invalid Client ID” message when trying to reconnect the account in N8N

9

+1 for what @Dispersal6474 said. Mine just up and disappeared.