1. Symptoms
The clw-prompt-timeout error manifests when running OpenClaw CLI commands that require interactive user input. The application waits for a response from the terminal, but no input arrives before the configured deadline expires, causing the operation to abort with a timeout error. Users typically encounter this error during authentication flows, configuration initialization, or when the CLI attempts to prompt for confirmations or selections in non-interactive environments.
When this error occurs, the CLI outputs a message similar to the following:
Error: clw-prompt-timeout
The interactive prompt did not receive a response within the configured timeout period (default: 30 seconds).
Consider using non-interactive flags (--no-prompt) or setting a higher timeout with --prompt-timeout.
Additional symptoms include the process exiting with a non-zero status code, typically 124, which is the standard exit code for commands terminated by timeout. The terminal may appear to hang momentarily before displaying the error, and any subsequent commands in a script pipeline may fail because the expected state changes from the prompt never occurred. In automated CI/CD pipelines, this error causes builds to fail with vague error messages unless verbose logging is enabled.
In some cases, the error appears alongside a secondary message indicating which specific prompt timed out, such as:
Prompt 'Enter your API key:' did not receive input within 15000ms
This granularity helps developers identify which interaction caused the timeout, though the root cause often relates to the execution environment rather than the specific prompt content.
2. Root Cause
The clw-prompt-timeout error originates from OpenClaw’s internal prompt handling mechanism, which implements a timeout guard around all interactive input operations. This design choice ensures that automated scripts and long-running processes do not hang indefinitely when waiting for human input that will never arrive. The underlying cause typically falls into one of several categories related to environment configuration and execution context.
The primary root cause is running the OpenClaw CLI in a non-interactive environment while the tool expects interactive input. CI/CD systems, Docker containers, SSH sessions without TTY allocation, and cron job contexts all lack the necessary terminal infrastructure to deliver user input to the application. When clw detects that stdin is not connected to a proper TTY device, it may still attempt to display prompts, but input can never be received, triggering the timeout mechanism.
A secondary root cause involves terminal settings that interfere with input delivery. Some terminal emulators or shell configurations modify the TTY mode in ways that cause input buffering or delays. Additionally, firewall rules or VPN software that intercept network connections may cause authentication prompts to hang while waiting for responses from remote validation services. The timeout fires not because the user is slow, but because the entire input delivery pipeline is blocked or broken.
Configuration issues also contribute to this error. If the CLW_PROMPT_TIMEOUT environment variable is set to an extremely low value, even quick typists may not finish entering their responses before the deadline expires. Similarly, if the system clock is incorrect or drifting, timeout calculations may produce unexpected results. Finally, running clw through certain wrapper scripts or process managers can sometimes break the stdin pipe, causing the application to believe it is in a non-interactive context when it actually is.
3. Step-by-Step Fix
Step 1: Identify Whether Your Environment Supports Interactive Input
Before attempting fixes, determine if your execution context supports interactive prompts. Run the following command to check the TTY status:
python -c "import os; print('TTY:', os.isatty(0)); import sys; print('Stdin connected:', not sys.stdin.closed)"
If the output shows TTY: False or indicates that stdin is not connected, your environment cannot support interactive prompts, and you must use non-interactive alternatives.
Step 2: Use Non-Interactive Flags
Most OpenClaw commands that trigger prompts include alternative flags for scripted execution. Replace interactive invocations with explicit flag values:
Before:
clw config set --global
After:
clw config set --global --api-key "your-api-key-value" --no-prompt
Consult the command help output to identify which flags correspond to the prompted values:
clw config set --help
Look for options marked as [default: None] or described as being prompted when not provided.
Step 3: Configure a Higher Timeout for Slow Environments
If you must use interactive mode but your environment has latency, increase the timeout duration by setting the environment variable:
Before:
# No timeout configuration
clw authenticate
After:
export CLW_PROMPT_TIMEOUT=120000
clw authenticate
This sets the timeout to 120 seconds, providing adequate time for slow network connections or complex multi-factor authentication flows.
Step 4: Pre-populate Configuration Files
For persistent non-interactive setups, create a configuration file that supplies all required values upfront:
Before:
# Empty configuration
clw init
# Triggers multiple prompts
After:
Create ~/.clw/config.yaml with the following structure:
api_endpoint: "https://api.openclaw.example.com"
api_key: "your-pre-configured-api-key"
default_project: "my-project"
timeout_seconds: 120
The CLI reads this file at startup and skips prompts for any values already present.
Step 5: Redirect /dev/null for Broken Stdin
In rare cases where a wrapper script accidentally closes stdin, force a clean non-interactive mode:
Before:
./run-clw-wrapper.sh
# Wrapper closes stdin causing timeout
After:
./run-clw-wrapper.sh </dev/null
This ensures the wrapper has a valid input stream, allowing clw to detect the non-interactive context cleanly and apply appropriate defaults.
4. Verification
After applying the fix, verify that the error no longer occurs by running the same command that previously failed. If you implemented the non-interactive flag approach, confirm that the command completes without any prompt output:
clw config set --global --api-key "test-key" --no-prompt && echo "SUCCESS: Command completed without timeout"
For timeout configuration changes, test with a deliberately slow input scenario to confirm the extended deadline works:
export CLW_PROMPT_TIMEOUT=60000
timeout 30 clw authenticate 2>&1 | grep -E "(timeout|complete|authenticated)"
The command should either complete successfully or fail with a different error code, never with clw-prompt-timeout.
If you modified the configuration file approach, validate the file syntax is correct:
clw config validate --file ~/.clw/config.yaml
A successful validation outputs no errors and confirms that all fields are parseable.
5. Common Pitfalls
A frequent mistake is setting the CLW_PROMPT_TIMEOUT value too low, especially when dealing with authentication flows that involve hardware token inputs or complex password managers. Values below 10 seconds rarely provide sufficient time for users to locate and enter credentials, particularly on first-time setup. Always set timeouts to at least 30 seconds, and prefer 60 to 120 seconds for initial configuration.
Another pitfall involves assuming that piping input through stdin satisfies the prompt mechanism. Commands like echo "value" | clw authenticate do not work because OpenClaw’s prompt handler expects input attached to a TTY device, not stream-based input. The only reliable approaches are explicit flag values, environment variables, or configuration files.
Users running OpenClaw inside Docker containers frequently encounter this error without realizing that container entrypoints default to non-interactive mode. Always pass the -t flag to allocate a pseudo-TTY, or explicitly use the --no-interactive flag if your container workload should never prompt:
docker run --interactive --tty openclaw-image clw deploy
Failing to pass these flags when needed causes the container process to wait indefinitely for a TTY that does not exist.
6. Related Errors
clw-auth-expiry: This error occurs when authentication tokens cached by OpenClaw expire during a session. Unlike the timeout error, which stems from missing input delivery, auth expiry indicates that previously obtained credentials have become invalid. Users experience this when leaving sessions idle for extended periods, and it requires re-authentication rather than input handling changes.
clw-session-timeout: This related error specifically concerns session inactivity timers rather than prompt timeouts. It triggers after a user authenticates but does not interact with the CLI for a configured duration. The session timeout operates at a higher level than individual prompts, affecting the entire session state rather than single interactions.
clw-pipe-mode-error: This error arises when OpenClaw detects that stdin has been piped from another process in an unexpected way. It differs from prompt timeout in that it immediately rejects the execution context rather than waiting for a timeout period. Users encounter this when redirecting file content to clw commands that do not support piped configuration data.