HTTP Request for Charles Schwab

[Anshul_Jain]

Describe the problem/error/question: Tryign to setup HTTP request and create new credential fro Charles Schwab developer API but not able to do it.

What is the error message (if any)?

{
“error”: “invalid_client”,
“error_description”: “Unauthorized”
}

Please share your workflow

{
“nodes”: [
{
“parameters”: {
“url”: “https://auth.tdameritrade.com/auth”,
“authentication”: “genericCredentialType”,
“genericAuthType”: “oAuth2Api”,
“sendHeaders”: true,
“headerParameters”: {
“parameters”: [
{}
]
},
“sendBody”: true,
“bodyParameters”: {
“parameters”: [
{}
]
},
“options”: {}
},
“type”: “n8n-nodes-base.httpRequest”,
“typeVersion”: 4.2,
“position”: [
1280,
240
],
“id”: “51ca2807-7897-4a6a-9cd7-4b418f2e2952”,
“name”: “HTTP Request”,
“credentials”: {
“httpHeaderAuth”: {
“id”: “1TYFgXbkmwcZQ9IH”,
“name”: “Header Auth account”
},
“oAuth2Api”: {
“id”: “iyTFyVKaIj7VwRaN”,
“name”: “CharlesSchwab”
}
}
}
],
“connections”: {},
“pinData”: {},
“meta”: {
“templateCredsSetupCompleted”: true,
“instanceId”: “bca21dd0a71d761cceef09c0b02bdff7aa1a5feec76148b3d550b7c230ef2497”
}
}

(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:. 1.82.3
• Database (default: SQLite):
• n8n EXECUTIONS_PROCESS setting (default: own, main):
• Running n8n via (Docker, npm, n8n cloud, desktop app): Cloud
• Operating system: Mac

[Erick_Torres]

The “invalid_client” error with “Unauthorized” indicates that:

• The OAuth client credentials are invalid.
• The client_id and/or client_secret may not be set correctly.
• The authorization URL may not correspond to the correct API for Charles Schwab.

[Erick_Torres]

Verify the OAuth client details:

• Check that the client_id, client_secret, redirect_uri, and scopes are correct and fully configured on the authentication node.

Confirm the correct URL for Charles Schwab:

• If you are trying to use the Charles Schwab API directly, make sure you are not using the old TD Ameritrade endpoint.
• Search for official Schwab Developer Platform documentation.

Reconfigure the OAuth2 node in n8n:

• Use the OAuth2 API credential type from n8n and configure it correctly:

Auth URL
Access Token URL
Client ID
Client Secret
Scope

• Redirect URL (must match the one registered in the developer console)

Test authentication outside of n8n (optional, but useful):

• Use Postman or curl to verify that your OAuth2 configuration is working outside of n8n. If it fails there too, the problem is with the client’s credentials or configuration.