Start real-time transcription. Transcription will stop on call hang-up, or can be initiated via the Transcription stop command.
Expected Webhooks:
call.transcription
POST
/
calls
/
{call_control_id}
/
actions
/
transcription_start
JavaScript
import Telnyx from 'telnyx';const client = new Telnyx({ apiKey: process.env['TELNYX_API_KEY'], // This is the default and can be omitted});const response = await client.calls.actions.startTranscription('call_control_id');console.log(response.data);
import os
from telnyx import Telnyx
client = Telnyx(
api_key=os.environ.get("TELNYX_API_KEY"), # This is the default and can be omitted
)
response = client.calls.actions.start_transcription(
call_control_id="call_control_id",
)
print(response.data)
Indicates which leg of the call will be transcribed. Use inbound for the leg that requested the transcription, outbound for the other leg, and both for both legs of the call. Will default to inbound.
import Telnyx from 'telnyx';const client = new Telnyx({ apiKey: process.env['TELNYX_API_KEY'], // This is the default and can be omitted});const response = await client.calls.actions.startTranscription('call_control_id');console.log(response.data);
import os
from telnyx import Telnyx
client = Telnyx(
api_key=os.environ.get("TELNYX_API_KEY"), # This is the default and can be omitted
)
response = client.calls.actions.start_transcription(
call_control_id="call_control_id",
)
print(response.data)
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Transcription will stop on call hang-up, or can be initiated via the Transcription stop command.\n\n**Expected Webhooks:**\n\n- `call.transcription`\n","operationId":"StartCallTranscription","tags":["Call Commands"],"parameters":["ef1df368-4534-4e32-b798-abd8ebc6758a"],"requestBody":"e51e1d9e-6a51-4c2a-9828-bd30746c6fe9","responses":{"200":"c9acdac8-e8dc-4e7b-9c0a-089b4397c7c6","422":"7ffb4af0-5808-4e18-8523-f7c522b70ca8","default":"30cdecf3-4ca7-40cd-9aef-4c3e91d6b454"},"x-codeSamples":[{"lang":"JavaScript","source":"import Telnyx from 'telnyx';\n\nconst client = new Telnyx({\n apiKey: process.env['TELNYX_API_KEY'], // This is the default and can be omitted\n});\n\nconst response = await client.calls.actions.startTranscription('call_control_id');\n\nconsole.log(response.data);"},{"lang":"Python","source":"import os\nfrom telnyx import Telnyx\n\nclient = Telnyx(\n api_key=os.environ.get(\"TELNYX_API_KEY\"), # This is the default and can be omitted\n)\nresponse = client.calls.actions.start_transcription(\n call_control_id=\"call_control_id\",\n)\nprint(response.data)\n"},{"lang":"Go","source":"package main\n\nimport (\n\t\"context\"\n\t\"fmt\"\n\n\t\"github.com/team-telnyx/telnyx-go\"\n\t\"github.com/team-telnyx/telnyx-go/option\"\n)\n\nfunc main() {\n\tclient := telnyx.NewClient(\n\t\toption.WithAPIKey(\"My API Key\"),\n\t)\n\tresponse, err := client.Calls.Actions.StartTranscription(\n\t\tcontext.TODO(),\n\t\t\"call_control_id\",\n\t\ttelnyx.CallActionStartTranscriptionParams{\n\t\t\tTranscriptionStartRequest: telnyx.TranscriptionStartRequestParam{},\n\t\t},\n\t)\n\tif err != nil {\n\t\tpanic(err.Error())\n\t}\n\tfmt.Printf(\"%+v\\n\", response.Data)\n}\n"},{"lang":"Java","source":"package com.telnyx.sdk.example;\n\nimport com.telnyx.sdk.client.TelnyxClient;\nimport com.telnyx.sdk.client.okhttp.TelnyxOkHttpClient;\nimport com.telnyx.sdk.models.calls.actions.ActionStartTranscriptionParams;\nimport com.telnyx.sdk.models.calls.actions.ActionStartTranscriptionResponse;\nimport com.telnyx.sdk.models.calls.actions.TranscriptionStartRequest;\n\npublic final class Main {\n private Main() {}\n\n public static void main(String[] args) {\n TelnyxClient client = TelnyxOkHttpClient.fromEnv();\n\n ActionStartTranscriptionParams params = ActionStartTranscriptionParams.builder()\n .callControlId(\"call_control_id\")\n .transcriptionStartRequest(TranscriptionStartRequest.builder().build())\n .build();\n ActionStartTranscriptionResponse response = client.calls().actions().startTranscription(params);\n }\n}"},{"lang":"Ruby","source":"require \"telnyx\"\n\ntelnyx = Telnyx::Client.new(api_key: \"My API Key\")\n\nresponse = telnyx.calls.actions.start_transcription(\"call_control_id\")\n\nputs(response)"},{"lang":"PHP","source":"\u003c?php\n\nrequire_once dirname(__DIR__) . '/vendor/autoload.php';\n\nuse Telnyx\\Client;\nuse Telnyx\\Calls\\Actions\\GoogleTranscriptionLanguage;\nuse Telnyx\\Core\\Exceptions\\APIException;\n\n$client = new Client(apiKey: getenv('TELNYX_API_KEY') ?: 'My API Key');\n\ntry {\n $response = $client->calls->actions->startTranscription(\n 'call_control_id',\n clientState: 'aGF2ZSBhIG5pY2UgZGF5ID1d',\n commandID: '891510ac-f3e4-11e8-af5b-de00688a4901',\n transcriptionEngine: 'Google',\n transcriptionEngineConfig: [\n 'enableSpeakerDiarization' => true,\n 'hints' => ['string'],\n 'interimResults' => true,\n 'language' => GoogleTranscriptionLanguage::EN,\n 'maxSpeakerCount' => 4,\n 'minSpeakerCount' => 4,\n 'model' => 'latest_long',\n 'profanityFilter' => true,\n 'speechContext' => [['boost' => 1, 'phrases' => ['string']]],\n 'transcriptionEngine' => 'Google',\n 'useEnhanced' => true,\n ],\n transcriptionTracks: 'both',\n );\n\n var_dump($response);\n} catch (APIException $e) {\n echo $e->getMessage();\n}"},{"lang":"CLI","source":"telnyx calls:actions start-transcription \\\n --api-key 'My API Key' \\\n --call-control-id call_control_id"}],"method":"post","type":"path","servers":["6db5daa3-bf7b-485e-9f1b-e4c952188a3d"],"security":["81bd1d55-1c9f-430b-8b12-68d00634162d"],"path":"/calls/{call_control_id}/actions/transcription_start","baseUrlOptions":["https://api.telnyx.com/v2"],"title":"Transcription start","codeSamples":[{"lang":"JavaScript","source":"import Telnyx from 'telnyx';\n\nconst client = new Telnyx({\n apiKey: process.env['TELNYX_API_KEY'], // This is the default and can be omitted\n});\n\nconst response = await client.calls.actions.startTranscription('call_control_id');\n\nconsole.log(response.data);"},{"lang":"Python","source":"import os\nfrom telnyx import Telnyx\n\nclient = Telnyx(\n api_key=os.environ.get(\"TELNYX_API_KEY\"), # This is the default and can be omitted\n)\nresponse = client.calls.actions.start_transcription(\n call_control_id=\"call_control_id\",\n)\nprint(response.data)\n"},{"lang":"Go","source":"package main\n\nimport (\n\t\"context\"\n\t\"fmt\"\n\n\t\"github.com/team-telnyx/telnyx-go\"\n\t\"github.com/team-telnyx/telnyx-go/option\"\n)\n\nfunc main() {\n\tclient := telnyx.NewClient(\n\t\toption.WithAPIKey(\"My API Key\"),\n\t)\n\tresponse, err := client.Calls.Actions.StartTranscription(\n\t\tcontext.TODO(),\n\t\t\"call_control_id\",\n\t\ttelnyx.CallActionStartTranscriptionParams{\n\t\t\tTranscriptionStartRequest: telnyx.TranscriptionStartRequestParam{},\n\t\t},\n\t)\n\tif err != nil {\n\t\tpanic(err.Error())\n\t}\n\tfmt.Printf(\"%+v\\n\", response.Data)\n}\n"},{"lang":"Java","source":"package com.telnyx.sdk.example;\n\nimport com.telnyx.sdk.client.TelnyxClient;\nimport com.telnyx.sdk.client.okhttp.TelnyxOkHttpClient;\nimport com.telnyx.sdk.models.calls.actions.ActionStartTranscriptionParams;\nimport com.telnyx.sdk.models.calls.actions.ActionStartTranscriptionResponse;\nimport com.telnyx.sdk.models.calls.actions.TranscriptionStartRequest;\n\npublic final class Main {\n private Main() {}\n\n public static void main(String[] args) {\n TelnyxClient client = TelnyxOkHttpClient.fromEnv();\n\n ActionStartTranscriptionParams params = ActionStartTranscriptionParams.builder()\n .callControlId(\"call_control_id\")\n .transcriptionStartRequest(TranscriptionStartRequest.builder().build())\n .build();\n ActionStartTranscriptionResponse response = client.calls().actions().startTranscription(params);\n }\n}"},{"lang":"Ruby","source":"require \"telnyx\"\n\ntelnyx = Telnyx::Client.new(api_key: \"My API Key\")\n\nresponse = telnyx.calls.actions.start_transcription(\"call_control_id\")\n\nputs(response)"},{"lang":"PHP","source":"\u003c?php\n\nrequire_once dirname(__DIR__) . '/vendor/autoload.php';\n\nuse Telnyx\\Client;\nuse Telnyx\\Calls\\Actions\\GoogleTranscriptionLanguage;\nuse Telnyx\\Core\\Exceptions\\APIException;\n\n$client = new Client(apiKey: getenv('TELNYX_API_KEY') ?: 'My API Key');\n\ntry {\n $response = $client->calls->actions->startTranscription(\n 'call_control_id',\n clientState: 'aGF2ZSBhIG5pY2UgZGF5ID1d',\n commandID: '891510ac-f3e4-11e8-af5b-de00688a4901',\n transcriptionEngine: 'Google',\n transcriptionEngineConfig: [\n 'enableSpeakerDiarization' => true,\n 'hints' => ['string'],\n 'interimResults' => true,\n 'language' => GoogleTranscriptionLanguage::EN,\n 'maxSpeakerCount' => 4,\n 'minSpeakerCount' => 4,\n 'model' => 'latest_long',\n 'profanityFilter' => true,\n 'speechContext' => [['boost' => 1, 'phrases' => ['string']]],\n 'transcriptionEngine' => 'Google',\n 'useEnhanced' => true,\n ],\n transcriptionTracks: 'both',\n );\n\n var_dump($response);\n} catch (APIException $e) {\n echo $e->getMessage();\n}"},{"lang":"CLI","source":"telnyx calls:actions start-transcription \\\n --api-key 'My API Key' \\\n --call-control-id call_control_id"}],"requiredOnlyExamples":false,"requestExampleType":"codeSamples","responseExampleType":"generated"},"dependencies":{"parameters":{"ef1df368-4534-4e32-b798-abd8ebc6758a":{"name":"call_control_id","description":"Unique identifier and token for controlling the call","in":"path","required":true,"schema":{"type":"string","isRequired":true,"description":"Unique identifier and token for controlling the call","uniqueKey":"","typeLabel":"string"}}},"requestBody":{"description":"Transcription start request","required":true,"content":{"application/json":{"schema":{"type":"object","title":"Transcription start request","properties":{"transcription_engine":{"description":"Engine to use for speech recognition. Legacy values `A` - `Google`, `B` - `Telnyx` are supported for backward compatibility.","type":"string","enum":["Google","Telnyx","Deepgram","Azure","xAI","AssemblyAI","Speechmatics","Soniox","Parakeet","Humain","Reson8","Cohere","A","B"],"default":"Google","example":"Google","uniqueKey":"transcription_engine","typeLabel":"enum\u003cstring>"},"transcription_engine_config":{"oneOf":[{"type":"object","title":"Transcription engine Google config","properties":{"transcription_engine":{"type":"string","enum":["Google"],"description":"Engine identifier for Google transcription service","uniqueKey":"transcription_engine_config.oneOf.0.transcription_engine","typeLabel":"enum\u003cstring>"},"language":{"title":"Google transcription engine list of languages","type":"string","description":"Language to use for speech recognition","example":"en","default":"en","enum":["af","sq","am","ar","hy","az","eu","bn","bs","bg","my","ca","yue","zh","hr","cs","da","nl","en","et","fil","fi","fr","gl","ka","de","el","gu","iw","hi","hu","is","id","it","ja","jv","kn","kk","km","ko","lo","lv","lt","mk","ms","ml","mr","mn","ne","no","fa","pl","pt","pa","ro","ru","rw","sr","si","sk","sl","ss","st","es","su","sw","sv","ta","te","th","tn","tr","ts","uk","ur","uz","ve","vi","xh","zu"],"uniqueKey":"transcription_engine_config.oneOf.0.language","typeLabel":"enum\u003cstring>"},"interim_results":{"type":"boolean","description":"Whether to send also interim results. 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If set to false, only final results will be sent.","default":false,"example":true,"uniqueKey":"transcription_engine_config.oneOf.10.interim_results","typeLabel":"boolean"}},"uniqueKey":"transcription_engine_config.oneOf.10","typeLabel":"Transcription engine AssemblyAI config · object"},{"type":"object","title":"Transcription engine Speechmatics config","properties":{"transcription_engine":{"type":"string","enum":["Speechmatics"],"description":"Engine identifier for Speechmatics transcription service","uniqueKey":"transcription_engine_config.oneOf.11.transcription_engine","typeLabel":"enum\u003cstring>"},"language":{"title":"Speechmatics transcription engine list of languages","type":"string","description":"Language to use for speech recognition. Accepted values depend on the selected `transcription_model`. `speechmatics/standard` supports: `en`, `ba`, `eu`, `gl`, `ga`, `mt`, `mn`, `sw`, `ug`, `cy`, `ar_en`, `cmn_en`, `en_ms`, `en_ta`, `tl`, `es-bilingual-en`, `cmn_en_ms_ta`. `speechmatics/linden-1` (preview) supports the same languages as Speechmatics Realtime: `ar`, `ar_en`, `ba`, `be`, `bg`, `bn`, `ca`, `cmn`, `cmn_en`, `cmn_en_ms_ta`, `cs`, `cy`, `da`, `de`, `el`, `en`, `en_ms`, `en_ta`, `eo`, `es`, `es-bilingual-en`, `et`, `eu`, `fa`, `fi`, `fr`, `ga`, `gl`, `he`, `hi`, `hr`, `hu`, `ia`, `id`, `it`, `ja`, `ko`, `lt`, `lv`, `mn`, `mr`, `ms`, `mt`, `nl`, `no`, `pl`, `pt`, `ro`, `ru`, `sk`, `sl`, `sv`, `sw`, `ta`, `th`, `tl`, `tr`, `ug`, `uk`, `ur`, `vi`, `yue`, plus the spelling and script variants `en-US`, `en-GB`, `en-AU`, `cmn-Hans`, and `cmn-Hant` (`en` alone uses the default spelling). A value outside the selected model's list is rejected. For `speechmatics/standard`, unset, blank, `auto`, `auto_beta`, or `multi` defaults to `en`; for `speechmatics/linden-1`, only an unset language defaults to `en`, and `auto`, `auto_beta`, or `multi` is rejected.","example":"en","default":"en","enum":["en","ba","eu","gl","ga","mt","mn","sw","ug","cy","ar_en","cmn_en","en_ms","en_ta","tl","es-bilingual-en","cmn_en_ms_ta","ar","be","bg","bn","ca","cmn","cs","da","de","el","eo","es","et","fa","fi","fr","he","hi","hr","hu","ia","id","it","ja","ko","lt","lv","mr","ms","nl","no","pl","pt","ro","ru","sk","sl","sv","ta","th","tr","uk","ur","vi","yue","en-US","en-GB","en-AU","cmn-Hans","cmn-Hant"],"uniqueKey":"transcription_engine_config.oneOf.11.language","typeLabel":"enum\u003cstring>"},"transcription_model":{"description":"The model to use for transcription. `speechmatics/linden-1` is a preview, vendor-hosted model with its own language support (see `language`).","type":"string","enum":["speechmatics/standard","speechmatics/linden-1"],"default":"speechmatics/standard","uniqueKey":"transcription_engine_config.oneOf.11.transcription_model","typeLabel":"enum\u003cstring>"},"interim_results":{"type":"boolean","description":"Whether to send also interim results. If set to false, only final results will be sent.","default":false,"example":true,"uniqueKey":"transcription_engine_config.oneOf.11.interim_results","typeLabel":"boolean"}},"uniqueKey":"transcription_engine_config.oneOf.11","typeLabel":"Transcription engine Speechmatics config · object"},{"type":"object","title":"Transcription engine Soniox config","required":["transcription_engine"],"properties":{"transcription_engine":{"type":"string","enum":["Soniox"],"description":"Engine identifier for Soniox transcription service","isRequired":true,"uniqueKey":"transcription_engine_config.oneOf.12.transcription_engine","typeLabel":"enum\u003cstring>"},"transcription_model":{"description":"The model to use for transcription.","type":"string","enum":["soniox/stt-rt-v4"],"default":"soniox/stt-rt-v4","uniqueKey":"transcription_engine_config.oneOf.12.transcription_model","typeLabel":"enum\u003cstring>"},"language":{"type":"string","description":"ISO 639-1 language hint (e.g. `en`, `es`), or `auto` to omit the hint and let Soniox auto-detect supported languages multilingually.","default":"auto","example":"auto","uniqueKey":"transcription_engine_config.oneOf.12.language","typeLabel":"string"},"interim_results":{"type":"boolean","description":"Whether to send also interim results. If set to false, only final results will be sent.","default":false,"example":true,"uniqueKey":"transcription_engine_config.oneOf.12.interim_results","typeLabel":"boolean"},"enable_endpoint_detection":{"type":"boolean","description":"When true, Soniox emits end-of-utterance events at the cadence configured by `max_endpoint_delay_ms`.","default":false,"example":false,"uniqueKey":"transcription_engine_config.oneOf.12.enable_endpoint_detection","typeLabel":"boolean"},"max_endpoint_delay_ms":{"type":"integer","minimum":500,"maximum":3000,"description":"Maximum silence (in milliseconds) before Soniox emits an end-of-utterance event. Only honored when `enable_endpoint_detection` is true. Range: 500-3000 ms.","example":1000,"uniqueKey":"transcription_engine_config.oneOf.12.max_endpoint_delay_ms","typeLabel":"integer"}},"uniqueKey":"transcription_engine_config.oneOf.12","typeLabel":"Transcription engine Soniox config · object"},{"type":"object","title":"Transcription engine Parakeet config","properties":{"transcription_engine":{"type":"string","enum":["Parakeet"],"description":"Engine identifier for Parakeet transcription service","uniqueKey":"transcription_engine_config.oneOf.13.transcription_engine","typeLabel":"enum\u003cstring>"},"transcription_model":{"description":"The model to use for transcription.","type":"string","enum":["nvidia/parakeet-v3","omi-health/omi-med-stt-v1"],"default":"nvidia/parakeet-v3","uniqueKey":"transcription_engine_config.oneOf.13.transcription_model","typeLabel":"enum\u003cstring>"},"interim_results":{"type":"boolean","description":"Whether to send also interim results. If set to false, only final results will be sent.","default":false,"example":true,"uniqueKey":"transcription_engine_config.oneOf.13.interim_results","typeLabel":"boolean"}},"uniqueKey":"transcription_engine_config.oneOf.13","typeLabel":"Transcription engine Parakeet config · object"},{"type":"object","title":"Transcription engine Humain config","properties":{"transcription_engine":{"type":"string","enum":["Humain"],"description":"Engine identifier for Humain transcription service","uniqueKey":"transcription_engine_config.oneOf.14.transcription_engine","typeLabel":"enum\u003cstring>"},"transcription_model":{"description":"The model to use for transcription.","type":"string","enum":["humain/realtime"],"default":"humain/realtime","uniqueKey":"transcription_engine_config.oneOf.14.transcription_model","typeLabel":"enum\u003cstring>"},"language":{"type":"string","description":"The language of the audio to be transcribed. `codeswitch` enables Arabic/English code-switching. `auto` resolves server-side to code-switching.","enum":["ar","en","codeswitch","auto"],"default":"en","example":"en","uniqueKey":"transcription_engine_config.oneOf.14.language","typeLabel":"enum\u003cstring>"}},"uniqueKey":"transcription_engine_config.oneOf.14","typeLabel":"Transcription engine Humain config · object"},{"type":"object","title":"Transcription engine Reson8 config","properties":{"transcription_engine":{"type":"string","enum":["Reson8"],"description":"Engine identifier for Reson8 transcription service","uniqueKey":"transcription_engine_config.oneOf.15.transcription_engine","typeLabel":"enum\u003cstring>"},"transcription_model":{"description":"The model to use for transcription.","type":"string","enum":["reson8/turns"],"default":"reson8/turns","uniqueKey":"transcription_engine_config.oneOf.15.transcription_model","typeLabel":"enum\u003cstring>"},"language":{"type":"string","description":"The language of the audio to be transcribed. `auto` (the default, also applied when `language` is omitted) enables automatic language detection.","enum":["auto","nl","en","fr","fy","de","it","pl","pt","es","sv"],"default":"auto","example":"auto","uniqueKey":"transcription_engine_config.oneOf.15.language","typeLabel":"enum\u003cstring>"}},"uniqueKey":"transcription_engine_config.oneOf.15","typeLabel":"Transcription engine Reson8 config · object"},{"type":"object","title":"Transcription engine Cohere config","properties":{"transcription_engine":{"type":"string","enum":["Cohere"],"description":"Engine identifier for Cohere transcription service","uniqueKey":"transcription_engine_config.oneOf.16.transcription_engine","typeLabel":"enum\u003cstring>"},"transcription_model":{"description":"The model to use for transcription.","type":"string","enum":["cohere/ar-stt"],"default":"cohere/ar-stt","uniqueKey":"transcription_engine_config.oneOf.16.transcription_model","typeLabel":"enum\u003cstring>"},"language":{"type":"string","description":"The language of the audio to be transcribed. Unlike other self-hosted models, Cohere does not auto-detect the language; `auto` is not supported.","enum":["ar","en"],"default":"ar","example":"ar","uniqueKey":"transcription_engine_config.oneOf.16.language","typeLabel":"enum\u003cstring>"}},"uniqueKey":"transcription_engine_config.oneOf.16","typeLabel":"Transcription engine Cohere config · object"},{"type":"object","title":"Transcription engine A config","properties":{"transcription_engine":{"type":"string","enum":["A"],"description":"Engine identifier for Google transcription service","uniqueKey":"transcription_engine_config.oneOf.17.transcription_engine","typeLabel":"enum\u003cstring>"},"language":{"title":"Google transcription engine list of languages","type":"string","description":"Language to use for speech recognition","example":"en","default":"en","enum":["af","sq","am","ar","hy","az","eu","bn","bs","bg","my","ca","yue","zh","hr","cs","da","nl","en","et","fil","fi","fr","gl","ka","de","el","gu","iw","hi","hu","is","id","it","ja","jv","kn","kk","km","ko","lo","lv","lt","mk","ms","ml","mr","mn","ne","no","fa","pl","pt","pa","ro","ru","rw","sr","si","sk","sl","ss","st","es","su","sw","sv","ta","te","th","tn","tr","ts","uk","ur","uz","ve","vi","xh","zu"],"uniqueKey":"transcription_engine_config.oneOf.17.language","typeLabel":"enum\u003cstring>"},"interim_results":{"type":"boolean","description":"Whether to send also interim results. If set to false, only final results will be sent.","default":false,"example":true,"uniqueKey":"transcription_engine_config.oneOf.17.interim_results","typeLabel":"boolean"},"enable_speaker_diarization":{"type":"boolean","description":"Enables speaker diarization.","default":false,"example":true,"uniqueKey":"transcription_engine_config.oneOf.17.enable_speaker_diarization","typeLabel":"boolean"},"min_speaker_count":{"description":"Defines minimum number of speakers in the conversation.","type":"integer","example":4,"default":2,"format":"int32","uniqueKey":"transcription_engine_config.oneOf.17.min_speaker_count","typeLabel":"integer\u003cint32>"},"max_speaker_count":{"description":"Defines maximum number of speakers in the conversation.","type":"integer","example":4,"default":6,"format":"int32","uniqueKey":"transcription_engine_config.oneOf.17.max_speaker_count","typeLabel":"integer\u003cint32>"},"profanity_filter":{"description":"Enables 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Humain config · object | Transcription engine Reson8 config · object | Transcription engine Cohere config · object | Transcription engine A config · object | Transcription engine B config · object"},"client_state":{"description":"Use this field to add state to every subsequent webhook. It must be a valid Base-64 encoded string.","type":"string","example":"aGF2ZSBhIG5pY2UgZGF5ID1d","uniqueKey":"client_state","typeLabel":"string"},"transcription_tracks":{"description":"Indicates which leg of the call will be transcribed. Use `inbound` for the leg that requested the transcription, `outbound` for the other leg, and `both` for both legs of the call. Will default to `inbound`.","type":"string","example":"both","default":"inbound","uniqueKey":"transcription_tracks","typeLabel":"string"},"command_id":{"description":"Use this field to avoid duplicate commands. Telnyx will ignore any command with the same `command_id` for the same `call_control_id`.","type":"string","example":"891510ac-f3e4-11e8-af5b-de00688a4901","uniqueKey":"command_id","typeLabel":"string"}},"example":{"transcription_engine":"Google","transcription_engine_config":{"transcription_engine":"Google","language":"en"},"client_state":"aGF2ZSBhIG5pY2UgZGF5ID1d","command_id":"891510ac-f3e4-11e8-af5b-de00688a4901"},"uniqueKey":"","typeLabel":"Transcription start request · object"},"examples":{"Example":{"title":"Example","value":{"transcription_engine":"Google","transcription_engine_config":{"transcription_engine":"Google","language":"en"},"client_state":"aGF2ZSBhIG5pY2UgZGF5ID1d","command_id":"891510ac-f3e4-11e8-af5b-de00688a4901"}}},"exampleType":"generated"}},"exampleType":"generated"},"responses":{"c9acdac8-e8dc-4e7b-9c0a-089b4397c7c6":{"description":"Successful response upon making a call control command.","content":{"application/json":{"schema":{"type":"object","title":"Call Control Command Response","properties":{"data":{"type":"object","title":"Call Control Command Result","example":{"result":"ok"},"properties":{"result":{"type":"string","example":"ok","uniqueKey":"data.result","typeLabel":"string"}},"uniqueKey":"data","typeLabel":"Call Control Command Result · object"}},"uniqueKey":"","typeLabel":"Call Control Command Response · object"},"examples":{"Example":{"title":"Example","value":{"data":{"result":"ok"}}}},"exampleType":"generated"}},"exampleType":"generated"},"7ffb4af0-5808-4e18-8523-f7c522b70ca8":{"description":"Unprocessable entity. The request was well-formed but could not be processed due to semantic errors. This includes validation errors, invalid parameter values, call state errors, conference errors, queue errors, recording/transcription errors, and business logic violations.","content":{"application/json":{"schema":{"properties":{"errors":{"type":"array","items":{"required":["code","title"],"properties":{"code":{"type":"string","format":"integer","isRequired":true,"uniqueKey":"errors.items.[INDEX].code","typeLabel":"string\u003cinteger>"},"title":{"type":"string","isRequired":true,"uniqueKey":"errors.items.[INDEX].title","typeLabel":"string"},"detail":{"type":"string","uniqueKey":"errors.items.[INDEX].detail","typeLabel":"string"},"source":{"type":"object","properties":{"pointer":{"description":"JSON pointer (RFC6901) to the offending entity.","type":"string","format":"json-pointer","uniqueKey":"errors.items.[INDEX].source.pointer","typeLabel":"string\u003cjson-pointer>"},"parameter":{"description":"Indicates which query parameter caused the error.","type":"string","uniqueKey":"errors.items.[INDEX].source.parameter","typeLabel":"string"}},"uniqueKey":"errors.items.[INDEX].source","typeLabel":"object"},"meta":{"type":"object","uniqueKey":"errors.items.[INDEX].meta","typeLabel":"object"}},"type":"object","uniqueKey":"errors.items.[INDEX]","typeLabel":"object"},"uniqueKey":"errors","typeLabel":"object[]"}},"type":"object","uniqueKey":"","typeLabel":"object"},"examples":{"missing_required_parameter":{"title":"missing_required_parameter","value":{"errors":[{"code":"10004","title":"Missing required parameter","detail":"The 'to' parameter is required and cannot be blank.","source":{"pointer":"/to"}}]}},"invalid_call_control_id":{"title":"invalid_call_control_id","value":{"errors":[{"code":"90015","title":"Invalid Call Control ID","detail":"The call_control_id provided was not valid.","source":{"pointer":"/call_control_id"}}]}},"call_already_ended":{"title":"call_already_ended","value":{"errors":[{"code":"90018","title":"Call has already ended","detail":"This call is no longer active and can't receive commands."}]}},"call_not_answered":{"title":"call_not_answered","value":{"errors":[{"code":"90034","title":"Call not answered yet","detail":"This call can't receive this command because it has not been answered yet."}]}},"cannot_record_before_audio_started":{"title":"cannot_record_before_audio_started","value":{"errors":[{"code":"90020","title":"Call recording triggered before audio started","detail":"Call recording cannot be started until audio has commenced on the call."}]}},"transcription_already_active":{"title":"transcription_already_active","value":{"errors":[{"code":"90054","title":"Call transcription is already in progress","detail":"Call transcription can not be started more than once."}]}},"ai_assistant_already_active":{"title":"ai_assistant_already_active","value":{"errors":[{"code":"90061","title":"AI Assistant is already in progress","detail":"AI Assistant cannot be started more than once."}]}},"conference_already_ended":{"title":"conference_already_ended","value":{"errors":[{"code":"90019","title":"Conference has already ended","detail":"This conference is no longer active and can't receive commands."}]}},"conference_name_conflict":{"title":"conference_name_conflict","value":{"errors":[{"code":"90033","title":"Unable to execute command","detail":"Conference with given name already exists and it's active."}]}},"max_participants_reached":{"title":"max_participants_reached","value":{"errors":[{"code":"90032","title":"Maximum number of participants reached","detail":"The maximum allowed value of `max_participants` has been reached at 100."}]}},"queue_full":{"title":"queue_full","value":{"errors":[{"code":"90036","title":"Queue full","detail":"The 'support' queue is full and can't accept more calls."}]}},"call_already_in_queue":{"title":"call_already_in_queue","value":{"errors":[{"code":"90038","title":"Call already in queue","detail":"Call can't be added to a queue it's already in."}]}},"invalid_connection_id":{"title":"invalid_connection_id","value":{"errors":[{"code":"10015","title":"Invalid value for connection_id (Call Control App ID)","detail":"The requested connection_id (Call Control App ID) is either invalid or does not exist. 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