Blog / operations
Hermes Agent Troubleshooting: A Recovery Toolkit
Most Hermes Agent problems are one of five things: the install did not finish, the provider is unreachable, sessions are not being stored, the channel is not wired, or a tool call fails. Diagnosing in that order removes guessing, because each layer can be checked without touching the next one. This guide is the checklist for doing that quickly.
- 01
Reproduce it outside the channel
If the failure appears in Telegram or Slack, first check whether the same request works from the terminal. That single test separates a runtime problem from a channel problem.
- 02
Check the runtime and provider
Confirm the agent starts, then confirm it can reach the provider. Authentication errors, expired keys, and exhausted quotas all fail here.
- 03
Check that sessions are stored
Ask a follow-up question that depends on the previous message. If the agent forgets immediately, session storage is the problem, not the model.
- 04
Check the channel wiring
Verify the channel credentials, the permissions the bot was granted, and whether the agent is in the right conversation. A bot that appears online can still be unable to read messages.
- 05
Check the tool layer last
Only once the agent answers correctly should you investigate a failing tool. Confirm the server starts, its credentials are present, and the specific tool is enabled.
Four-step path
How do you diagnose a Hermes Agent failure?
Work outward from the runtime. Never debug two layers at once, because that is how a ten-minute fix becomes an afternoon.
- Step 01
Reproduce it outside the channel
If the failure appears in Telegram or Slack, first check whether the same request works from the terminal. That single test separates a runtime problem from a channel problem.
- Step 02
Check the runtime and provider
Confirm the agent starts, then confirm it can reach the provider. Authentication errors, expired keys, and exhausted quotas all fail here.
- Step 03
Check that sessions are stored
Ask a follow-up question that depends on the previous message. If the agent forgets immediately, session storage is the problem, not the model.
- Step 04
Check the channel wiring
Verify the channel credentials, the permissions the bot was granted, and whether the agent is in the right conversation. A bot that appears online can still be unable to read messages.
- Step 05
Check the tool layer last
Only once the agent answers correctly should you investigate a failing tool. Confirm the server starts, its credentials are present, and the specific tool is enabled.
The install finished but the command is missing
The command is usually installed but not on the path of the shell you are using, or the shell was opened before the path changed.
- Open a new terminal so the updated path is loaded.
- Check the install location and add it to the path explicitly.
- On Windows, confirm the install ran in the shell you are testing.
The agent starts but every request fails
Provider authentication or quota is the first suspect: a key the runtime cannot read, an expired key, or a billing limit reached.
- Confirm the key is visible to the process, not just to your interactive shell.
- Check the provider dashboard for quota and billing state.
- Try a second provider key to separate a bad key from a network problem.
- Review routing and fallback configuration if a specific model fails.
The bot is online but never replies
Being online only proves the connection. Reading messages usually needs an extra permission or intent that was never granted.
- Confirm the bot was invited to the specific server or group.
- Grant the message-reading permission the platform requires.
- Check whether the agent only answers mentions in that channel type.
- Re-test in a direct message before returning to the group.
The agent answers but a tool never runs
Either the tool is not registered, its credentials are missing, or it was filtered out. Check the registered tool list before changing the model.
- Ask the agent which tools it currently has.
- Run the tool server outside the agent to prove it starts.
- Confirm environment variables reached the server process.
- Re-read any per-server tool filters that could hide the tool.
When should you roll back instead of debugging?
When the failure started with a version change and people are waiting. Restore the last known good version, then investigate calmly.
Which primary sources support this page?
Product behavior is checked against the current deployment flow. These external links provide the upstream project or channel documentation used for setup details.
Direct answers
Frequently asked questions
Why does my Hermes Agent bot show online but stay silent?
Online means connected, not permitted. Most silent bots are missing a message-read permission or intent, or are not present in the specific conversation.
Why does the agent forget what I just said?
Session storage is the usual cause. If a follow-up question that depends on the previous message fails, the problem is persistence rather than the model.
Should I change the model when a tool fails?
No. Tool failures are configuration problems. Check the registered tool list, the server's credentials, and any tool filters before touching the model.
What is the first thing to check after an upgrade?
One real message in one real channel. That single test covers the runtime, the provider, and the channel in one action.
Key takeaways
- Most Hermes Agent problems are one of five things: the install did not finish, the provider is unreachable, sessions are not being stored, the channel is not wired, or a tool call fails. Diagnosing in that order removes guessing, because each layer can be checked without touching the next one. This guide is the checklist for doing that quickly.
- Start with one model, one channel, and one controlled test conversation.
- Use managed hosting when deployment speed matters more than operating the server yourself.
Continue the setup
Related Hermes Agent guides
Blog guide
Why Hermes Agent Is Not Sending or Receiving Messages
Troubleshoot Hermes Agent message failures across Telegram, Discord, and WhatsApp by checking channel access, runtime state, model keys, and logs.
Read nextBlog guide
How to Upgrade, Back Up, and Roll Back Hermes Agent
Back up Hermes Agent configuration, memory, and credentials, upgrade on purpose rather than by accident, and roll back a version that breaks a workflow.
Read nextBlog guide
Hermes Agent Provider Routing Across Multiple Models
Route Hermes Agent across multiple model providers by task, cost, and latency. Covers rule design, verification steps, and the failure modes to avoid.
Read nextUse case
Connect MCP Tool Servers to Hermes Agent
Connect Hermes Agent to MCP tool servers for GitHub, databases, file systems, note apps, and internal APIs without writing native tools.
Read next