# `Prometheus.Format.Protobuf`
[🔗](https://github.com/prometheus-erl/prometheus.ex/blob/v5.1.0/lib/prometheus/format/protobuf.ex#L1)

Serializes Prometheus registry using [protocol buffer format](http://bit.ly/2cxSuJP).

# `content_type`

Content type of protocol buffer format.

# `format`

Format `registry` (default is `:default`) using protocol buffer format.

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*Consult [api-reference.md](api-reference.md) for complete listing*