Fix clw-api-not-found: OpenClaw API Endpoint Resolution Failure

1. Symptoms

The clw-api-not-found error manifests when OpenClaw fails to resolve or locate a required API endpoint during runtime. Developers typically encounter this error immediately after initiating a connection, running a sync operation, or attempting to access cloud resources through the OpenClaw CLI or API client.

Common symptom patterns include:

• CLI command terminates with exit code 127 and the clw-api-not-found message
• API calls return 404 status codes or connection failures
• Configuration files appear correct but operations fail silently or with cryptic messages
• The error occurs on first-time setup or after infrastructure changes

Typical error output:

[ERROR] clw-api-not-found: Unable to locate API endpoint at https://api.openclaw.local/v2
[ERROR] Failed to establish connection. Check your configuration and network settings.
[ERROR] Request ID: req_8f3k2m9n1p

Error: clw-api-not-found
    at ApiResolver.resolve (/usr/local/lib/openclaw/resolver.js:142:15)
    at async Command.run (/usr/local/lib/openclaw/commands/sync.js:38:12)
    at async main (/usr/local/lib/openclaw/index.js:67:10)

PS C:\projects\my-app> openclaw sync --env production
[FATAL] clw-api-not-found: The specified API endpoint 'https://api.openclaw.io/v2' could not be resolved.
[FATAL] Ensure the endpoint URL is correct and the service is accessible.

The error message may vary slightly depending on the OpenClaw version and configuration source, but the core clw-api-not-found error code remains consistent across all platforms and deployment scenarios.

2. Root Cause

The clw-api-not-found error occurs due to several underlying causes, ranging from misconfigured endpoints to network-level resolution failures. Understanding these root causes is essential for implementing the correct fix.

Primary Causes

1. Incorrect API Endpoint URL

The most frequent cause involves a malformed or outdated API endpoint URL in the OpenClaw configuration. This typically happens when:

• The endpoint URL contains typos (e.g., api.opnclaw.io instead of api.openclaw.io)
• The API version path is incorrect (e.g., /v3 when /v2 is expected)
• The protocol scheme is missing or incorrect (HTTP vs HTTPS)

2. Missing or Corrupted Configuration File

OpenClaw relies on configuration files (.openclawrc, openclaw.config.json, or environment variables) to locate API endpoints. If these files are:

• Missing from the expected locations
• Corrupted or contain invalid JSON/YAML syntax
• Not readable due to permission issues

The resolver cannot obtain the endpoint information.

3. DNS Resolution Failures

When the hostname in the endpoint URL cannot be resolved to an IP address:

• The internal DNS server is unreachable
• The hostname is misspelled
• The DNS cache is stale or corrupted
• The service has moved to a different domain

4. Service Endpoint Not Deployed

In CI/CD environments or development setups:

• The OpenClaw API service container is not running
• The load balancer has removed the instance from rotation
• The service endpoint changed due to infrastructure updates
• The development mock server is not running

5. Environment-Specific Configuration Mismatch

Multi-environment setups (development, staging, production) often suffer from:

• Wrong environment variable pointing to the wrong endpoint
• Stale local configuration cached from a previous environment
• Environment-specific override files that conflict with global settings

3. Step-by-Step Fix

Step 1: Verify OpenClaw Installation and Version

First, confirm that OpenClaw is properly installed and you have a compatible version:

# Check OpenClaw version
openclaw --version

# Verify installation integrity
openclaw doctor

# List installed plugins and endpoints
openclaw config list

If the installation is corrupted, reinstall OpenClaw:

# Uninstall existing installation
npm uninstall -g @openclaw/cli

# Clear npm cache
npm cache clean --force

# Reinstall the latest version
npm install -g @openclaw/cli@latest

# Verify installation
openclaw --version

Step 2: Examine Configuration Files

Locate and inspect all OpenClaw configuration files:

Linux/macOS locations:

• ~/.openclawrc
• ~/.config/openclaw/config.json
• ./.openclawrc (project root)
• ./openclaw.config.json

Windows locations:

• %USERPROFILE%\.openclawrc
• %APPDATA%\OpenClaw\config.json
• .\.openclawrc (project root)

Check the configuration content:

# View global configuration
cat ~/.openclawrc

# View project-level configuration
cat ./openclaw.config.json

# Display effective configuration
openclaw config show

Example valid configuration:

{
  "api": {
    "endpoint": "https://api.openclaw.io/v2",
    "timeout": 30000,
    "retryAttempts": 3
  },
  "auth": {
    "token": "your-auth-token-here",
    "type": "bearer"
  },
  "environment": "production"
}

Before:

{
  "api": {
    "endpoint": "htps://api.openclaw.io/v2",  // typo in protocol
    "timeout": 30000
  }
}

After:

{
  "api": {
    "endpoint": "https://api.openclaw.io/v2",
    "timeout": 30000
  }
}

Step 3: Validate Endpoint URL

Test the API endpoint directly to confirm it is reachable:

# Test with curl (Linux/macOS)
curl -I https://api.openclaw.io/v2

# Test with PowerShell (Windows)
Invoke-WebRequest -Uri "https://api.openclaw.io/v2" -Method HEAD

# Test with OpenClaw's built-in diagnostics
openclaw api ping --endpoint https://api.openclaw.io/v2

Successful response:

HTTP/2 200
content-type: application/json
date: 2026-06-11T22:20:04.756552+08:00

{"status":"ok","version":"2.4.1","timestamp":"2024-01-15T10:30:00Z"}

Failed response:

curl: (6) Could not resolve host: api.openclaw.io

If DNS resolution fails, proceed to Step 4.

Step 4: Fix DNS Resolution Issues

Clear local DNS cache:

# macOS
sudo dscacheutil -flushcache
sudo killall -HUP mDNSResponder

# Linux (systemd-resolved)
sudo systemd-resolve --flush-caches

# Linux (nscd)
sudo nscd -i hosts

# Windows
ipconfig /flushdns

Test DNS resolution:

# Basic DNS lookup
nslookup api.openclaw.io

# Detailed DNS information
dig api.openclaw.io

# Using Google DNS for verification
nslookup api.openclaw.io 8.8.8.8

If using a custom DNS server, verify its availability:

ping -c 4 8.8.8.8
traceroute api.openclaw.io

Step 5: Update Configuration with Correct Endpoint

Set endpoint via CLI:

# Set the API endpoint
openclaw config set api.endpoint https://api.openclaw.io/v2

# Set environment variable as fallback
export OPENCLAW_API_ENDPOINT=https://api.openclaw.io/v2

# Verify the configuration update
openclaw config show | grep endpoint

Before:

# Wrong endpoint in environment variable
export OPENCLAW_API_ENDPOINT=https://api.opnclaw.io/v2

After:

# Correct endpoint
export OPENCLAW_API_ENDPOINT=https://api.openclaw.io/v2

Update configuration file directly:

{
  "api": {
    "endpoint": "https://api.openclaw.io/v2"
  }
}

Step 6: Verify Service Availability

Check if the OpenClaw API service is running in your environment:

# Check service status (Docker)
docker ps | grep openclaw-api

# Check service logs
docker logs openclaw-api --tail 50

# Check Kubernetes pod status
kubectl get pods -l app=openclaw-api
kubectl describe pod -l app=openclaw-api

If the service is not running, start it:

# Docker Compose
docker-compose up -d openclaw-api

# Kubernetes
kubectl apply -f openclaw-api-deployment.yaml
kubectl rollout status deployment/openclaw-api

4. Verification

After applying the fix, verify that the clw-api-not-found error is resolved by running the following commands in sequence:

Test Basic Connectivity

# Test API ping
openclaw api ping

# Expected output:
[INFO] Connecting to API endpoint...
[INFO] Successfully connected to https://api.openclaw.io/v2
[INFO] API status: healthy
[INFO] Response time: 142ms

Run Full Diagnostic Suite

# Run comprehensive diagnostics
openclaw doctor --verbose

# Expected output:
Checking configuration files... OK
Checking API endpoint resolution... OK
Checking authentication... OK
Checking network connectivity... OK
Checking plugin status... OK

[SUCCESS] All checks passed. OpenClaw is ready to use.

Execute Test Operation

# Run a test sync operation
openclaw sync --env production --dry-run

# Expected output:
[INFO] Starting sync operation in dry-run mode
[INFO] Connected to: https://api.openclaw.io/v2
[INFO] Fetching resource清单...
[INFO] Found 24 resources to sync
[INFO] Dry-run complete. No changes made.

Verify Configuration Persistence

# Confirm configuration is saved correctly
openclaw config show

# Check for the correct endpoint in output:
# api:
#   endpoint: https://api.openclaw.io/v2

If all verification steps pass, the clw-api-not-found error has been successfully resolved.

5. Common Pitfalls

Pitfall 1: Configuration File Precedence Confusion

OpenClaw loads configuration files in a specific order, and later files can override earlier ones. The precedence from lowest to highest is:

1. System-wide configuration (/etc/openclaw/config.json)
2. User global configuration (~/.openclawrc)
3. Project configuration (./openclaw.config.json)
4. Environment variables (OPENCLAW_*)
5. CLI flags (--endpoint)

Mistake: Setting the correct endpoint in ~/.openclawrc but having a typo in ./openclaw.config.json that overrides it.

Solution: Always check the effective configuration with openclaw config show to see what OpenClaw actually loads.

Pitfall 2: Cached Credentials Pointing to Old Endpoints

When switching between environments, cached authentication tokens may be associated with specific endpoints:

# Clear cached tokens
openclaw auth logout
openclaw auth login --endpoint https://api.openclaw.io/v2

Pitfall 3: Firewall or Proxy Interference

Corporate proxies or firewalls may intercept API requests:

# Configure proxy settings
export HTTP_PROXY=http://proxy.company.com:8080
export HTTPS_PROXY=http://proxy.company.com:8080
export NO_PROXY=localhost,127.0.0.1

# Test through proxy
openclaw api ping --proxy http://proxy.company.com:8080

Pitfall 4: Self-Signed Certificates in Development

Development environments often use self-signed certificates:

# Disable certificate verification (NOT recommended for production)
export OPENCLAW_SSL_VERIFY=false

# Or configure trusted certificates
export OPENCLAW_CERT_PATH=/path/to/ca-bundle.crt

Pitfall 5: Case Sensitivity in Endpoint URLs

API endpoints may be case-sensitive:

Before:

https://api.openclaw.io/V2/resources

After:

https://api.openclaw.io/v2/resources

Pitfall 6: Trailing Slashes

Inconsistent trailing slash handling can cause issues:

Before:

{
  "api": {
    "endpoint": "https://api.openclaw.io/v2/"
  }
}

After:

{
  "api": {
    "endpoint": "https://api.openclaw.io/v2"
  }
}

6. Related Errors

The following error codes are commonly related to or may occur alongside clw-api-not-found:

Example of related error chain:

[FATAL] clw-api-not-found: Unable to locate API endpoint
    -> User updates configuration with correct endpoint
[INFO] clw-endpoint-timeout: Connection timed out after 30000ms
    -> User checks firewall rules
[INFO] clw-ssl-handshake-failed: Certificate verification failed
    -> User configures trusted certificates
[SUCCESS] API connection established successfully

Resolution sequence when multiple errors occur:

1. First resolve clw-api-not-found by ensuring the endpoint URL is correct
2. Then address clw-endpoint-timeout by checking network connectivity
3. Finally handle clw-ssl-handshake-failed if certificate issues persist

⚠️ Unverified: Some specific endpoint URLs and version paths mentioned in this article may vary depending on your OpenClaw license tier and deployment type. Consult your organization’s internal documentation or OpenClaw support for enterprise-specific endpoints.