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github.com/prometheus/client_golang

repository ↗ · DeepWiki ↗ · release v1.24.1 ↗ · + Follow · compare 4 versions

1,582 symbols 6,241 edges 163 files ⚖ custom 627 documented · 40% ● updated 9d agov1.24.1 · 2026-07-24★ 6,02183 open issues

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⨍ Functions 1,308◇ Types & classes 274

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README

Prometheus Go client library

This is the Go client library for Prometheus. It has two separate parts, one for instrumenting application code, and one for creating clients that talk to the Prometheus HTTP API.

Version Compatibility

This library supports the two most recent major releases of Go. While it may function with older versions, we only provide fixes and support for the currently supported Go releases.

[!NOTE] See our Release Process for details on compatibility and support policies.

Important note about releases and stability

This repository generally follows Semantic Versioning. However, the API client in prometheus/client_golang/api/… is still considered experimental. Breaking changes of the API client will not trigger a new major release. The same is true for selected other new features explicitly marked as EXPERIMENTAL in CHANGELOG.md.

Features that require breaking changes in the stable parts of the repository are being batched up and tracked in the v2 milestone, but plans for further development of v2 at the moment.

NOTE: The initial v2 attempt is in a separate branch. We also started experimenting on a new prometheus.V2.* APIs in the 1.x's V2 struct. Help wanted!

Instrumenting applications

The prometheus directory contains the instrumentation library. See the guide on the Prometheus website to learn more about instrumenting applications.

The examples directory contains simple examples of instrumented code.

Client for the Prometheus HTTP API

The api/prometheus directory contains the client for the Prometheus HTTP API. It allows you to write Go applications that query time series data from a Prometheus server. It is still in alpha stage.

Where is `model`, `extraction`, and `text`?

The model packages has been moved to prometheus/common/model.

The extraction and text packages are now contained in prometheus/common/expfmt.

Contributing and community

See the contributing guidelines and the Community section of the homepage.

client_golang community is also present on the CNCF Slack #prometheus-client_golang.

Extension points exported contracts — how you extend this code

Metric (Interface)

For convenient use with xxhash. A Metric models a single sample value with its meta data being exported to Prometheus. I [15 …

prometheus/metric.go

Gatherer (Interface)

Gatherer is the interface for the part of a registry in charge of gathering the collected metrics into a number of Metri [8 …

prometheus/registry.go

Collector (Interface)

Collector is the interface implemented by anything that can be used by Prometheus to collect metrics. A Collector has to [19 …

prometheus/collector.go

ObserverVec (Interface)

ObserverVec is an interface implemented by `HistogramVec` and `SummaryVec`. [5 implementers]

prometheus/observer.go

HTTPDoer (Interface)

HTTPDoer is an interface for the one method of http.Client that is used by Pusher [5 implementers]

prometheus/push/push.go

Client (Interface)

Client is the interface for an API client. [5 implementers]

api/client.go

browse all types & interfaces →

Core symbols most depended-on inside this repo

↓ 37 filesGauge

Gauge is a Metric that represents a single numerical value that can arbitrarily go up and down. A Gauge is typically used for …

prometheus/gauge.go

↓ 36 filesMetric

For convenient use with xxhash. A Metric models a single sample value with its meta data being exported to Prometheus. …

prometheus/metric.go

↓ 28 filesCollector

Collector is the interface implemented by anything that can be used by Prometheus to collect metrics. A Collector has to be …

prometheus/collector.go

↓ 25 filesNewRegistry

NewRegistry creates a new vanilla Registry without any Collectors pre-registered.

prometheus/registry.go

↓ 24 filesBridge

Bridge pushes metrics to the configured Graphite server.

prometheus/graphite/bridge.go

↓ 23 filesRegistry

Registry registers Prometheus collectors, collects their metrics, and gathers them into MetricFamilies for exposition. It …

prometheus/registry.go

browse all functions →

Shape

Function 720

Method 588

Struct 188

TypeAlias 38

Interface 33

FuncType 15

Languages

Go100%

C1%

Modules by API surface

api/prometheus/v1/api.go127 symbols

exp/api/remote/genproto/v2/types.pb.go108 symbols

prometheus/histogram.go67 symbols

exp/api/remote/genproto/v2/types_vtproto.pb.go47 symbols

prometheus/registry.go46 symbols

exp/api/remote/remote_api.go42 symbols

prometheus/summary.go40 symbols

prometheus/vec.go38 symbols

prometheus/promhttp/http_test.go36 symbols

prometheus/histogram_test.go36 symbols

prometheus/promhttp/instrument_server_test.go33 symbols

prometheus/vec_test.go32 symbols

Dependencies from manifests, versioned

github.com/beorn7/perksv1.0.1 · 1×

github.com/bwplotka/tracing-gov0.0.0-2023042106160 · 1×

github.com/cenkalti/backoff/v4v4.3.0 · 1×

github.com/cespare/xxhash/v2v2.3.0 · 1×

github.com/davecgh/go-spewv1.1.1 · 1×

github.com/efficientgo/corev1.0.0-rc.3 · 1×

github.com/efficientgo/e2ev0.14.1-0.2023042107 · 1×

github.com/efficientgo/tools/corev0.0.0-2023050515374 · 1×

github.com/felixge/httpsnoopv1.0.4 · 1×

github.com/go-logr/logrv1.4.3 · 1×

github.com/go-logr/stdrv1.2.2 · 1×

github.com/golang-jwt/jwt/v5v5.3.1 · 1×

For agents

$ claude mcp add client_golang \
  -- python -m otcore.mcp_server <graph>

⬇ download graph artifact

github.com/prometheus/client_golang @v1.24.1@v1.24.0@v1.23.2@v1.18.0

Prometheus Go client library

Version Compatibility

Important note about releases and stability

Instrumenting applications

Client for the Prometheus HTTP API

Where is model, extraction, and text?

Contributing and community

Extension points exported contracts — how you extend this code

Core symbols most depended-on inside this repo

Shape

Languages

Modules by API surface

Dependencies from manifests, versioned

For agents

Ask about this repo answers extend the page

github.com/prometheus/client_golang

Where is `model`, `extraction`, and `text`?