Anthropic

The Anthropic Go library provides convenient access to the Anthropic REST API from applications written in Go. import ( "github.com/anthropics/anthropic-sdk-go" // imported as anthropic )

package main import ( "context" "fmt" "github.com/anthropics/anthropic-sdk-go" "github.com/anthropics/anthropic-sdk-go/option" ) func main() { client := anthropic.NewClient( option.WithAPIKey("my-anthropic-api-key"), // defaults to os.LookupEnv("ANTHROPIC_API_KEY") ) message, err := client.Messages.New(context.TODO(), anthropic.MessageNewParams{ MaxTokens: 1024, Messages: []anthropic.MessageParam{ anthropic.NewUserMessage(anthropic.NewTextBlock("What is a quaternion?")), }, Model: anthropic.ModelClaudeSonnet4_5_20250929, }) if err != nil { panic(err.Error()) } fmt.Printf("%+v\n", message.Content) }

Go client library for interacting with the Anthropic safety-first language model REST APIs. - unfunco/anthropic-sdk-go

It is heavily inspired by the Unofficial Go SDK for OpenAI API by @sashabaranov ... package main import ( "context" "fmt" anthropic "github.com/adamchol/go-anthropic-sdk" ) func main() { client := anthropic.NewClient("your-token") resp, err := client.CreateMessage(context.Background(), anthropic.MessageRequest{ Model: anthropic.Claude35SonnetModel, Messages: []anthropic.InputMessage{ { Role: anthropic.MessageRoleUser, Content: "Hello, how are you?", }, }, MaxTokens: 4096, }) if err != nil { fmt.Println(err) } fmt.Println(resp.Content[0].Text) }

anthropic-sdk-go Public · Access to Anthropic's safety-first language model APIs via Go · anthropics/anthropic-sdk-go’s past year of commit activity · Go 664 MIT 83 25 11 Updated · Dec 26, 2025 · anthropic-sdk-php Public · Access to Anthropic's safety-first language model APIs in PHP ·

$ go get github.com/modeledge/anthropic-sdk-go/[email protected] Example usage: package main import ( "fmt" "github.com/modeledge/anthropic-sdk-go/v2" "github.com/modeledge/anthropic-sdk-go/v2/data" "github.com/modeledge/anthropic-sdk-go/v2/resp" ) func main() { c, err := anthropic.New(&anthropic.Config{Key: "your keys", DefaultModel: data.ModelFullInstant}) if err != nil { panic(err) } d, err := c.Send(&anthropic.Sender{ Message: data.MessageModule{ Human: "Do you know Golang, please answer me in the shortest possible way.", }, Sender: &resp.Sender{MaxToken: 1200}, }) if err != nil { panic(err) } fmt.Println(d.Response.String()) } Return: {"detail":null,"completion":"Hello world!

This SDK provides support for tool use, aka function calling. More details can be found in the documentation. This library also provides support for the Anthropic Bedrock API if you install this library with the bedrock extra, e.g.

package main import ( "fmt" "github.com/3JoB/anthropic-sdk-go" "github.com/3JoB/anthropic-sdk-go/data" ) func main() { c, err := anthropic.New("api keys","modules") if err != nil { panic(err) } d, err := c.Send(&anthropic.Opts{ Message: data.MessageModule{ Human: "Do you know Golang, please answer me in the shortest possible way.", }, Sender: anthropic.Sender{MaxToken: 1200}, }) if err != nil { panic(err) } fmt.Println(d.Response.String()) }

package main import ( "fmt" "github.com/3JoB/anthropic-sdk-go/v2" "github.com/3JoB/anthropic-sdk-go/v2/resp" "github.com/3JoB/anthropic-sdk-go/v2/data" ) func main() { c, err := anthropic.New(&anthropic.Config{Key: "your keys", DefaultModel: data.ModelFullInstant}) if err != nil { panic(err) } d, err := c.Send(&anthropic.Sender{ Message: data.MessageModule{ Human: "Do you know Golang, please answer me in the shortest possible way.", }, Sender: &resp.Sender{MaxToken: 1200}, }) if err != nil { panic(err) } fmt.Println(d.Response.String()) ds, err := c.Send(&anthropic.Sender{ Message: data.MessageModule{ Human: "What is its current version number?", }, SessionID: d.ID, Sender: &resp.Sender{MaxToken: 1200}, }) if err != nil { panic(err) } fmt.Println(ds.Response.String()) }

Go SDK for Anthropic's Claude, a next-generation AI assistant for your tasks, no matter the scale. - madebywelch/anthropic-go

This is a golang SDK for anthropic claude API.

github.com/anthropics/anthropic-sdk-go · Open Source Insights · type HTTPClient · type Middleware · type MiddlewareNext · type RequestOption · func WithAPIKey(value string) RequestOption · func WithAuthToken(value string) RequestOption · func WithBaseURL(base string) RequestOption ·

Anthropic Claude API wrapper for Go. Contribute to liushuangls/go-anthropic development by creating an account on GitHub.

This library requires Go 1.18+. The full API of this library can be found in api.md. package main import ( "context" "fmt" "github.com/anthropics/anthropic-sdk-go" "github.com/anthropics/anthropic-sdk-go/option" ) func main() { client := anthropic.NewClient( option.WithAPIKey("my-anthropic-api-key"), // defaults to os.LookupEnv("ANTHROPIC_API_KEY") ) message, err := client.Messages.New(context.TODO(), anthropic.MessageNewParams{ MaxTokens: 1024, Messages: []anthropic.MessageParam{ anthropic.NewUserMessage(anthropic.NewTextBlock("What is a quaternion?")), }, Model: anthropic.ModelClaudeSonnet4_20250514, }) if err != nil { panic(err.Error()) } fmt.Printf("%+v\n", message.Content) }

Access to Anthropic's safety-first language model APIs via Go - Releases · anthropics/anthropic-sdk-go

Access to Anthropic's safety-first language model APIs via Go - anthropic-sdk-go/CHANGELOG.md at main · anthropics/anthropic-sdk-go

Access to Anthropic's safety-first language model APIs via Go - anthropic-sdk-go/client.go at main · anthropics/anthropic-sdk-go

Access to Anthropic's safety-first language model APIs via Go - Pull requests · anthropics/anthropic-sdk-go

Model Model `json:"model,omitempty"` // MaxTokensToSample is the maximum number of tokens to generate before stopping. Required. MaxTokensToSample int `json:"max_tokens_to_sample"` // StopSequences specifies a list of sequences to stop sampling at. Anthropic's models stop on "\n\nHuman:", and // may include additional built-in stop sequences in the future.

Access to Anthropic's safety-first language model APIs via Go - anthropic-sdk-go/examples/tools/main.go at main · anthropics/anthropic-sdk-go