Using Deepgram Conversational STT from the Go SDK

When to use this product

Use this skill when someone asks for Flux or conversational STT v2 in the Go SDK.

Current repo status: this SDK ships a first-class pkg/client/listen/v2 WebSocket client for Flux STT. Flux STT does not have a REST client.

Use a different skill when:

• v1 Listen is acceptable (deepgram-go-speech-to-text)
• voice-agent runtime is the real target (deepgram-go-voice-agent)

Authentication

Flux constructors with defaults resolve credentials from DEEPGRAM_API_KEY or DEEPGRAM_ACCESS_TOKEN.

export DEEPGRAM_API_KEY="your_api_key"

Connection setup

Use the versioned v2 package and typed options:

package main

import (
  "context"
  "log"

  api "github.com/deepgram/deepgram-go-sdk/v3/pkg/api/listen/v2/websocket"
  interfaces "github.com/deepgram/deepgram-go-sdk/v3/pkg/client/interfaces"
  listen "github.com/deepgram/deepgram-go-sdk/v3/pkg/client/listen/v2"
)

func main() {
  ctx := context.Background()
  handler := api.NewDefaultCallbackHandler()
  client, err := listen.NewWSUsingCallbackWithDefaults(ctx, &interfaces.FluxTranscriptionOptions{
    Model: "flux-general-en",
  }, handler)
  if err != nil {
    log.Fatal(err)
  }
  defer client.Stop()

  if !client.Connect() {
    log.Fatal("connect failed")
  }
}

This establishes the session only. Send audio with Write or Stream; use a runnable example for the complete capture and event-handling flow.

Key parameters

• interfaces.FluxTranscriptionOptions
  • Model is required: flux-general-en or flux-general-multi
  • Encoding, SampleRate, Keyterm, Tag, and LanguageHint configure connection behavior
  • EagerEotThreshold, EotThreshold, and EotTimeoutMs configure turn detection
• interfaces.FluxConfigureOptions
  • send with WSCallback.Configure or WSChannel.Configure to update thresholds, keyterms, or language hints mid-session
• constructors
  • listen.NewWSUsingCallbackWithDefaults and listen.NewWSUsingChanWithDefaults use environment-backed credentials
  • listen.NewWSUsingCallback and listen.NewWSUsingChan accept explicit v2 client options and handlers

API reference (layered)

1. In-repo reference
   • README.md
   • docs.go
   • pkg/client/listen/v2/client.go
   • pkg/client/listen/v2/websocket
   • pkg/api/listen/v2/websocket/interfaces
   • pkg/client/interfaces/v2/types-flux.go
2. OpenAPI
   • https://developers.deepgram.com/openapi.yaml
3. AsyncAPI
   • https://developers.deepgram.com/asyncapi.yaml
4. Context7
   • /llmstxt/developers_deepgram_llms_txt
5. Product docs
   • https://developers.deepgram.com/reference/speech-to-text/listen-flux

Gotchas

1. Flux STT is WebSocket-only; route v1 prerecorded or Nova streaming requests to deepgram-go-speech-to-text.
2. Use pkg/client/listen/v2, not the v1 pkg/client/listen facade, for Flux STT.
3. Flux callback and channel clients use their own v2 event interfaces; do not mix them with Listen v1 handlers.

Example files in this repo

• examples/speech-to-text/websocket/flux_callback/main.go
• examples/speech-to-text/websocket/flux_channel/main.go
• examples/speech-to-text/websocket/flux_force_end_turn/main.go

Central product skills

For cross-language Deepgram product knowledge — the consolidated API reference, documentation finder, focused runnable recipes, third-party integration examples, and MCP setup — install the central skills:

npx skills add deepgram/skills

This SDK ships language-idiomatic code skills; deepgram/skills ships cross-language product knowledge (see api, docs, recipes, examples, starters, setup-mcp).