Fix: OpenClaw Model API Key Errors — 401 Unauthorized,...

Common API Key Errors

When OpenClaw can’t authenticate with your model provider, you’ll see errors like:

Error: 401 Unauthorized - Invalid API key

Error: You exceeded your current quota

Error: model "gpt-4o" not found or not available for your API key

Here’s how to fix each one.

Error: 401 Unauthorized / Invalid API Key

Check 1: Is the key set?

openclaw status

Look for the model provider section. If it shows “not configured,” set your key:

# OpenAI
openclaw configure --set providers.openai.apiKey='sk-...'

# Anthropic
openclaw configure --set providers.anthropic.apiKey='sk-ant-...'

# Azure OpenAI
openclaw configure --set providers.azure.apiKey='your-key'
openclaw configure --set providers.azure.endpoint='https://your-resource.openai.azure.com'

Check 2: Key format

Check 3: Key hasn’t expired or been revoked

# Quick test — OpenAI
curl -s https://api.openai.com/v1/models   -H "Authorization: Bearer sk-your-key" | head -5

# Quick test — Anthropic
curl -s https://api.anthropic.com/v1/messages   -H "x-api-key: sk-ant-your-key"   -H "anthropic-version: 2023-06-01"   -H "content-type: application/json"   -d '{"model":"claude-sonnet-4-20250514","max_tokens":10,"messages":[{"role":"user","content":"hi"}]}'

If the curl test also fails, regenerate your API key at the provider’s dashboard.

Error: Quota Exceeded / Rate Limited

Error: You exceeded your current quota. Please check your plan and billing details.

This means either:

1. Your account has no credit — add payment method at the provider’s billing page
2. You hit a rate limit — temporary, wait and retry

Rate Limit Handling

OpenClaw handles rate limits automatically with exponential backoff. But if you’re consistently hitting limits:

{
  "models": {
    "default": "claude-sonnet-4-20250514",
    "fallback": "gpt-4o-mini"
  }
}

Setting a fallback model means if your primary model rate-limits, OpenClaw can fall through to a cheaper/less-limited model.

Cost Control

Set spending limits at the provider level:

• OpenAI: Settings → Billing → Usage limits
• Anthropic: Settings → Plans & Billing → Spending limit
• Azure: Set budget alerts in Azure Cost Management

Error: Model Not Found

Error: model "gpt-4o" not found

Possible causes:

1. Your API key doesn’t have access to that model — some models require specific tier access
2. Typo in model name — check the exact model identifier
3. Model deprecated — providers retire old model versions

Common model names (as of 2026):

# OpenAI
gpt-4o
gpt-4o-mini
gpt-5-mini
o3-mini

# Anthropic
claude-sonnet-4-20250514
claude-opus-4-20250514
claude-haiku-3-20240307

# GitHub Copilot (via OpenClaw)
github-copilot/gpt-4o
github-copilot/claude-sonnet-4-20250514
github-copilot/claude-opus-4-20250514

GitHub Copilot Pro Setup

GitHub Copilot Pro gives you access to GPT-5-mini and Claude models through OpenClaw without separate API keys. This is the most cost-effective way to run OpenClaw if you already have a Copilot subscription.

openclaw configure
# Follow the GitHub OAuth flow when prompted

For the full GPT-5-mini + Copilot Pro setup, see my detailed guide: OpenClaw with GPT-5-mini via Copilot Pro.

Multi-Provider Configuration

For reliability, configure multiple providers and set fallback chains:

{
  "providers": {
    "anthropic": {
      "apiKey": "sk-ant-..."
    },
    "openai": {
      "apiKey": "sk-..."
    }
  },
  "models": {
    "default": "claude-sonnet-4-20250514",
    "fallback": "gpt-4o-mini"
  }
}

Debugging

# Check current configuration (keys are masked)
openclaw status

# Test a specific model
openclaw test-model claude-sonnet-4-20250514

# Check gateway logs for API errors
openclaw gateway logs | grep -i "error\|401\|403\|429"

Related

• OpenClaw GPT-5-mini Copilot Pro guide
• Local LLM vs API models comparison
• OpenClaw Raspberry Pi budget setup