---
title: Meter node
description: The Meter node increments a specified metric key each time evaluation passes through the node.
component: auth-node-ref
version: latest
page_id: auth-node-ref::meter
canonical_url: https://docs.pingidentity.com/auth-node-ref/latest/meter.html
keywords: ["Nodes & Trees", "Journeys", "Authentication"]
page_aliases: ["auth-node-meter.adoc"]
superseded_by: https://docs.pingidentity.com/auth-node-ref/latest/meter.html
section_ids:
  example: Example
  availability: Availability
  inputs: Inputs
  dependencies: Dependencies
  configuration: Configuration
  outputs: Outputs
  callbacks: Callbacks
  outcomes: Outcomes
  errors: Errors
---

# Meter node

The Meter node increments a specified metric key each time evaluation passes through the node.

The custom metric defined in this node is included in the Prometheus metrics available to Advanced Identity Cloud. Learn more in [AM Prometheus metrics](https://docs.pingidentity.com/pingoneaic/am-reference/prometheus-metrics.html). This lets you monitor the metric over time to observe trends using monitoring tools such as Prometheus.

## Example

The following example demonstrates using the Meter node in a multi-factor authentication (MFA) journey to track the number of times an OTP is requested via SMS:

![MFA journey with Meter node](_images/meter-node-journey.png)

* The [Page node](page.html) containing the [Platform Username node](platform-username.html) and [Platform Password node](platform-password.html) prompts for credentials.

* The [Data Store Decision node](data-store-decision.html) validates the username-password credentials.

* The [HOTP Generator node](hotp-generator.html) generates an eight-digit OTP.

* The [Choice Collector node](choice-collector.html) prompts the user to choose whether they want to receive the OTP via SMS or email.

  * If the user chooses SMS:

    * The Meter node increments the custom metric specified in the node configuration. For example, a metric called `custom.meter.otp.sms.requests`.

    * The [OTP SMS Sender node](otp-sms-sender.html) sends the OTP to the user's mobile number.

  * If the user chooses email, the [OTP Email Sender node](otp-email-sender.html) sends the OTP to the user's email address.

* The [OTP Collector Decision node](otp-collector-decision.html) prompts the user to enter the OTP they received and verifies it. If the OTP is correct, the user is authenticated.

You can then monitor the `custom.meter.otp.sms.requests` metric over time to observe how many OTP requests are made via SMS.

## Availability

| Product                               | Available? |
| ------------------------------------- | ---------- |
| PingOne Advanced Identity Cloud       | Yes        |
| PingAM (self-managed)                 | Yes        |
| Ping Identity Platform (self-managed) | Yes        |

## Inputs

None. This node doesn't read shared state data.

## Dependencies

This node has no dependencies.

## Configuration

| Property                | Usage                                                                                                               |
| ----------------------- | ------------------------------------------------------------------------------------------------------------------- |
| Metric Key *(required)* | The name of the custom metric to increment when evaluation passes through this node.Example: `custom.meter.metric`. |

## Outputs

This node doesn't change the shared state.

## Callbacks

This node doesn't send any callbacks.

## Outcomes

Single outcome path.

## Errors

This node doesn't log any error or warning messages of its own.