Prometheus

Agentgateway exposes Prometheus-compatible metrics for monitoring and alerting.

Metrics endpoint

Agentgateway exposes metrics on port 15020 by default:

curl http://localhost:15020/metrics

Available metrics

Request metrics

Metric	Type	Description
`agentgateway_requests_total`	Counter	Total number of requests
`agentgateway_request_duration_seconds`	Histogram	Request duration
`agentgateway_request_size_bytes`	Histogram	Request size
`agentgateway_response_size_bytes`	Histogram	Response size

Connection metrics

Metric	Type	Description
`agentgateway_connections_active`	Gauge	Active connections
`agentgateway_connections_total`	Counter	Total connections

MCP metrics

Metric	Type	Description
`agentgateway_mcp_sessions_active`	Gauge	Active MCP sessions
`agentgateway_mcp_requests_total`	Counter	Total MCP requests by method

LLM metrics

Metric	Type	Description
`agentgateway_llm_requests_total`	Counter	Total LLM requests
`agentgateway_llm_tokens_total`	Counter	Total tokens (input/output)
`agentgateway_llm_request_duration_seconds`	Histogram	LLM request duration

Prometheus configuration

Add agentgateway to your Prometheus configuration:

# prometheus.yml
scrape_configs:
  - job_name: 'agentgateway'
    static_configs:
      - targets: ['localhost:15020']
    scrape_interval: 15s

Docker Compose example

version: '3'
services:
  agentgateway:
    image: ghcr.io/agentgateway/agentgateway:latest
    ports:
      - "3000:3000"
      - "15020:15020"
    volumes:
      - ./config.yaml:/etc/agentgateway/config.yaml

  prometheus:
    image: prom/prometheus:latest
    ports:
      - "9090:9090"
    volumes:
      - ./prometheus.yml:/etc/prometheus/prometheus.yml
    command:
      - '--config.file=/etc/prometheus/prometheus.yml'

Kubernetes ServiceMonitor

For Kubernetes deployments with Prometheus Operator:

apiVersion: monitoring.coreos.com/v1
kind: ServiceMonitor
metadata:
  name: agentgateway
spec:
  selector:
    matchLabels:
      app: agentgateway
  endpoints:
  - port: metrics
    interval: 15s
    path: /metrics