---
title: Telegraf Documentation
description: Telegraf plugin for sending metrics to Arc
url: https://docs.influxdata.com/telegraf/v1/output-plugins/arc/
estimated_tokens: 994
product: Telegraf
version: v1
---

-   Telegraf v1.37.0+

# Arc Output Plugin

This plugin writes metrics to [Arc](https://github.com/basekick-labs/arc), a high-performance time-series database, via MessagePack binary protocol messages providing a **3-5x better performance** than the line-protocol format.

**Introduced in:** Telegraf v1.37.0 **Tags:** datastore **OS support:** all

## Global configuration options

Plugins support additional global and plugin configuration settings for tasks such as modifying metrics, tags, and fields, creating aliases, and configuring plugin ordering. See [CONFIGURATION.md](/telegraf/v1/configuration/#plugins) for more details.

## Configuration

```toml
# Arc Time-Series Database Output Plugin
[[outputs.arc]]
  ## Arc MessagePack API URL
  url = "http://localhost:8000/api/v1/write/msgpack"

  ## API Key for authentication (required, auth is enabled by default)
  api_key = ""

  ## Database name for multi-database architecture
  ## Defaults to the server configured DB if not specified or empty
  # database = ""

  ## Content encoding for request body
  ## Options: "gzip" (default), "identity"
  # content_encoding = "gzip"

  ## Timeout for HTTP writes
  # timeout = "5s"

  ## Additional HTTP headers
  # [outputs.arc.headers]
  #   X-Custom-Header = "custom-value"
```

## Troubleshooting

For authentication issues, ensure you have generated a valid API key with write permissions. See the [Arc documentation](https://docs.basekick.net/arc) for details on authentication and configuration.

For connection or performance issues, check that Arc is running and accessible, and review the Telegraf debug logs.

#### Related

-   [Configure plugins](/telegraf/v1/configure_plugins/)
-   [Arc Plugin Source](https://github.com/influxdata/telegraf/tree/v1.38.4/plugins/outputs/arc/README.md)