agentmetrics-hermes
AgentMetrics observability plugin for Hermes agents. Auto-discovered via the hermes_agent.plugins entry-point — no code changes needed.
Install
pip install agentmetrics-hermes
Configuration
Create ~/.config/hermes/agentmetrics.yaml:
api_key: am_your_key
server_url: http://localhost:4000
agent_id: my-hermes-agent
environment: production
Or set environment variables (take precedence over the file):
| Variable | Description |
|---|---|
AGENTMETRICS_API_KEY |
API key |
AGENTMETRICS_SERVER_URL |
Server URL |
AGENTMETRICS_AGENT_ID |
Agent identifier |
AGENTMETRICS_ENVIRONMENT |
Deployment environment |
What gets tracked
| Metric | Description |
|---|---|
input_tokens / output_tokens |
Aggregated LLM token usage |
cache_read_tokens / cache_write_tokens |
Prompt cache statistics |
estimated_cost_usd |
Computed from model pricing |
duration_ms |
Session wall-clock time |
tool_calls / tool_errors |
Per-step tool tracking |
llm_calls |
Number of model API requests |
secrets_blocked_count |
Credentials redacted before transmission |
error |
Exception message on failure (secrets scrubbed) |
Durability
Events are written to a local WAL before transmission. If the server is unreachable the plugin retries automatically via an internal circuit breaker. Events that exhaust all retries go to a dead-letter queue and are surfaced as audit_dlq_alert events.
Security
All event payloads are scanned for API keys, JWTs, and passwords before transmission. Set redaction_mode: debug in the config to disable scrubbing during local development (expires automatically after a configurable TTL).
License
1 maintainer
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