v3

latestOpenAPI 3.1.02026-08-011057254.3 KB
transcript

Get transcript

<Note>To retrieve your transcriptions on our EU server, replace api.assemblyai.com with api.eu.assemblyai.com.</Note> Get the transcript resource. The transcript is ready when the "status" is "completed".

get/v2/transcript/{transcript_id}

Path parameters

transcript_idstring required

ID of the transcript

Response

The transcript resource

audio_channelsinteger

The number of audio channels in the audio file. This is only present when multichannel is enabled.

audio_durationinteger nullable

The duration of this transcript object's media file, in seconds

audio_end_atinteger nullable

The point in time, in milliseconds, in the file at which the transcription was terminated. See Set the start and end of the transcript for more details.

audio_start_frominteger nullable

The point in time, in milliseconds, in the file at which the transcription was started. See Set the start and end of the transcript for more details.

audio_urlstring url required

The URL of the media that was transcribed

auto_chaptersboolean nullable

Whether Auto Chapters is enabled, can be true or false. Deprecated - use LLM Gateway instead for more flexible chapter summaries. See the updated Auto Chapters page for details.

Note: This parameter is only supported for the Universal-2 model.

auto_highlightsboolean required

Whether Key Phrases is enabled, either true or false

confidencenumber double nullable

The confidence score for the transcript, between 0.0 (low confidence) and 1.0 (high confidence)

content_safetyboolean nullable

Whether Content Moderation is enabled, can be true or false

disfluenciesboolean nullable

Transcribe Filler Words, like "umm", in your media file; can be true or false. Supported on Universal-3.5 Pro and Universal-2.

domainstring nullable

The domain-specific model applied to the transcript. When set to "medical-v1", Medical Mode was used to improve accuracy for medical terminology.

entity_detectionboolean nullable

Whether Entity Detection is enabled, can be true or false

errorstring

Error message of why the transcript failed

filter_profanityboolean nullable

Whether Profanity Filtering is enabled, either true or false

format_textboolean nullable

Whether Text Formatting is enabled, either true or false

iab_categoriesboolean nullable

Whether Topic Detection is enabled, can be true or false

idstring uuid required

The unique identifier of your transcript

keyterms_promptstring[]

Improve accuracy with up to 200 (for Universal-2) or 1000 (for Universal-3.5 Pro) domain-specific words or phrases (maximum 6 words per phrase). See Keyterms Prompting for more details.

language_codesTranscriptLanguageCode[] nullable

The language codes of your audio file. Used for Code switching One of the values specified must be en.

language_confidencenumber double nullable required

The confidence score for the detected language, between 0.0 (low confidence) and 1.0 (high confidence). See Automatic Language Detection for more details.

language_confidence_thresholdnumber float nullable required

The confidence threshold for the automatically detected language. An error will be returned if the language confidence is below this threshold. See Automatic Language Detection for more details.

language_detectionboolean nullable

Whether Automatic language detection is enabled, either true or false

multichannelboolean nullable

Whether Multichannel transcription was enabled in the transcription request, either true or false

promptstring

Provide natural language prompting of up to 1,500 words of contextual information to the model. See the Prompting Guide for best practices.

Note: This parameter is only supported for the Universal-3.5 Pro model.

punctuateboolean nullable

Whether Automatic Punctuation is enabled, either true or false

redact_piiboolean required

Whether PII Redaction is enabled, either true or false

redact_pii_audioboolean nullable

Whether a redacted version of the audio file was generated, either true or false. See PII redaction for more information.

redact_pii_audio_quality'mp3' | 'wav' nullable

Controls the filetype of the audio created by redact_pii_audio. Currently supports mp3 (default) and wav. See PII redaction for more details.

redact_pii_policiesPiiPolicy[] nullable

The list of PII Redaction policies that were enabled, if PII Redaction is enabled. See PII redaction for more information.

redact_pii_sub'entity_name' | 'hash'

The replacement logic for detected PII, can be entity_name or hash. See PII redaction for more details.

redact_pii_return_unredactedboolean nullable

Whether the original unredacted transcript was also returned alongside the redacted one. When true, the response includes unredacted_text, unredacted_words, and unredacted_utterances. See PII redaction for more information.

sentiment_analysisboolean nullable

Whether Sentiment Analysis is enabled, can be true or false

speaker_labelsboolean nullable

Whether Speaker diarization is enabled, can be true or false

speakers_expectedinteger nullable

Tell the speaker label model how many speakers it should attempt to identify. See Set number of speakers expected for more details.

speech_model_used'universal-3-5-pro' | 'universal-2'

The speech model to use for the transcription. See Model Selection for available models.

speech_modelsSpeechModel[] nullable

List of speech models that were used (in priority order) to transcribe the audio. If not specified in the request, this defaults to ["universal-3-5-pro", "universal-2"]. See Model Selection for available models and routing behavior.

speech_thresholdnumber float nullable

Defaults to null. Reject audio files that contain less than this fraction of speech. Valid values are in the range [0, 1] inclusive. See Speech Threshold for more details.

status'queued' | 'processing' | 'completed' | 'error' required

The status of your transcript. Possible values are queued, processing, completed, or error.

summarizationboolean required

Whether Summarization is enabled, either true or false. Deprecated - use LLM Gateway instead for more flexible summaries. See the updated Summarization page for details.

Note: This parameter is only supported for the Universal-2 model.

summarystring nullable

The generated summary of the media file, if Summarization is enabled. Deprecated - use LLM Gateway instead for more flexible summaries. See the updated Summarization page for details.

summary_modelstring nullable

The Summarization model used to generate the summary, if Summarization is enabled. Deprecated - use LLM Gateway instead for more flexible summaries. See the updated Summarization page for details.

summary_typestring nullable

The type of summary generated, if Summarization is enabled. Deprecated - use LLM Gateway instead for more flexible summaries. See the updated Summarization page for details.

remove_audio_tags'all' | 'speaker' nullable

Universal-3.5 Pro generates rich transcripts that can include inline annotations such as audio event markers and speaker cues. Set to "all" to remove all inline annotations, or "speaker" to remove only speaker cues while keeping other annotations. By default, all inline annotations are removed.

Note: This parameter is only supported for the Universal-3.5 Pro model.

temperaturenumber nullable

The temperature that was used for the model's response. See the Prompting Guide for more details.

Note: This parameter only takes effect on the Universal-3.5 Pro model.

textstring nullable

The textual transcript of your media file

unredacted_textstring nullable

The original textual transcript of your media file before PII redaction was applied. Only returned when redact_pii_return_unredacted was set to true on the transcription request, otherwise this field is omitted and the text field remains fully redacted. See PII redaction for more information.

throttledboolean nullable

True while a request is throttled and false when a request is no longer throttled

webhook_authboolean required

Whether webhook authentication details were provided

webhook_auth_header_namestring nullable

The header name to be sent with the transcript completed or failed webhook requests. Must be 1-1000 characters and contain only ASCII letters, numbers, hyphens, and underscores. Requires webhook_auth_header_value and webhook_url to also be set.

webhook_status_codeinteger nullable

The status code we received from your server when delivering the transcript completed or failed webhook request, if a webhook URL was provided

webhook_urlstring url nullable

The URL to which we send webhook requests.

acoustic_modelstring required

This parameter does not currently have any functionality attached to it.

custom_topicsboolean nullable

This parameter does not currently have any functionality attached to it.

language_modelstring required

This parameter does not currently have any functionality attached to it.

speech_model'universal-3-5-pro' | 'universal-2' nullable required

The speech model to use for the transcription. See Model Selection for available models.

speed_boostboolean nullable

This parameter does not currently have any functionality attached to it.

topicsstring[]

This parameter does not currently have any functionality attached to it.

Example response

{
  "id": "9ea68fd3-f953-42c1-9742-976c447fb463",
  "speech_model": null,
  "language_model": "assemblyai_default",
  "acoustic_model": "assemblyai_default",
  "language_code": "en_us",
  "language_detection": true,
  "language_confidence_threshold": 0.7,
  "language_confidence": 0.9959,
  "status": "completed",
  "audio_url": "https://assembly.ai/wildfires.mp3",
  "text": "Smoke from hundreds of wildfires in Canada is triggering air quality alerts throughout the US. Skylines from Maine to Maryland to Minnesota are gray and smoggy. And in some places, the air quality warnings include the warning to stay inside. We wanted to better understand what's happening here and why, so we called Peter de Carlo, an associate professor in the Department of Environmental Health and Engineering at Johns Hopkins University Varsity. Good morning, professor. Good morning. What is it about the conditions right now that have caused this round of wildfires to affect so many people so far away? Well, there's a couple of things. The season has been pretty dry already. And then the fact that we're getting hit in the US. Is because there's a couple of weather systems that are essentially channeling the smoke from those Canadian wildfires through Pennsylvania into the Mid Atlantic and the Northeast and kind of just dropping the smoke there. So what is it in this haze that makes it harmful? And I'm assuming it is harmful. It is. The levels outside right now in Baltimore are considered unhealthy. And most of that is due to what's called particulate matter, which are tiny particles, microscopic smaller than the width of your hair that can get into your lungs and impact your respiratory system, your cardiovascular system, and even your neurological your brain. What makes this particularly harmful? Is it the volume of particulant? Is it something in particular? What is it exactly? Can you just drill down on that a little bit more? Yeah. So the concentration of particulate matter I was looking at some of the monitors that we have was reaching levels of what are, in science, big 150 micrograms per meter cubed, which is more than ten times what the annual average should be and about four times higher than what you're supposed to have on a 24 hours average. And so the concentrations of these particles in the air are just much, much higher than we typically see. And exposure to those high levels can lead to a host of health problems. And who is most vulnerable? I noticed that in New York City, for example, they're canceling outdoor activities. And so here it is in the early days of summer, and they have to keep all the kids inside. So who tends to be vulnerable in a situation like this? It's the youngest. So children, obviously, whose bodies are still developing. The elderly, who are their bodies are more in decline and they're more susceptible to the health impacts of breathing, the poor air quality. And then people who have preexisting health conditions, people with respiratory conditions or heart conditions can be triggered by high levels of air pollution. Could this get worse? That's a good question. In some areas, it's much worse than others. And it just depends on kind of where the smoke is concentrated. I think New York has some of the higher concentrations right now, but that's going to change as that air moves away from the New York area. But over the course of the next few days, we will see different areas being hit at different times with the highest concentrations. I was going to ask you about more fires start burning. I don't expect the concentrations to go up too much higher. I was going to ask you how and you started to answer this, but how much longer could this last? Or forgive me if I'm asking you to speculate, but what do you think? Well, I think the fires are going to burn for a little bit longer, but the key for us in the US. Is the weather system changing. And so right now, it's kind of the weather systems that are pulling that air into our mid Atlantic and Northeast region. As those weather systems change and shift, we'll see that smoke going elsewhere and not impact us in this region as much. And so I think that's going to be the defining factor. And I think the next couple of days we're going to see a shift in that weather pattern and start to push the smoke away from where we are. And finally, with the impacts of climate change, we are seeing more wildfires. Will we be seeing more of these kinds of wide ranging air quality consequences or circumstances? I mean, that is one of the predictions for climate change. Looking into the future, the fire season is starting earlier and lasting longer, and we're seeing more frequent fires. So, yeah, this is probably something that we'll be seeing more frequently. This tends to be much more of an issue in the Western US. So the eastern US. Getting hit right now is a little bit new. But yeah, I think with climate change moving forward, this is something that is going to happen more frequently. That's Peter De Carlo, associate professor in the Department of Environmental Health and Engineering at Johns Hopkins University. Sergeant Carlo, thanks so much for joining us and sharing this expertise with us. Thank you for having me.",
  "words": [
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  "utterances": [
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      "text": "Smoke from hundreds of wildfires in Canada is triggering air quality alerts throughout the US. Skylines from Maine to Maryland to Minnesota are gray and smoggy. And in some places, the air quality warnings include the warning to stay inside. We wanted to better understand what's happening here and why, so we called Peter de Carlo, an associate professor in the Department of Environmental Health and Engineering at Johns Hopkins University Varsity. Good morning, professor.",
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  "punctuate": true,
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  "multichannel": false,
  "webhook_url": "https://your-webhook-url.tld/path",
  "webhook_status_code": 200,
  "webhook_auth": true,
  "webhook_auth_header_name": "webhook-secret",
  "auto_highlights_result": {
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      {
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      {
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        "text": "Peter de Carlo",
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        "text": "New York City",
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        ]
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      {
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        "rank": 0.05,
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      {
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      {
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        "text": "climate change",
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        "text": "Johns Hopkins University Varsity",
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        "text": "heart conditions",
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      {
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        "text": "air quality warnings",
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    ]
  },
  "auto_highlights": true,
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  "filter_profanity": true,
  "redact_pii": true,
  "redact_pii_audio": true,
  "redact_pii_audio_quality": "mp3",
  "redact_pii_policies": [
    "us_social_security_number",
    "credit_card_number"
  ],
  "redact_pii_sub": "hash",
  "speaker_labels": true,
  "content_safety": true,
  "iab_categories": true,
  "content_safety_labels": {
    "status": "success",
    "results": [
      {
        "text": "Smoke from hundreds of wildfires in Canada is triggering air quality alerts throughout the US. Skylines from Maine to Maryland to Minnesota are gray and smoggy. And in some places, the air quality warnings include the warning to stay inside. We wanted to better understand what's happening here and why, so we called Peter de Carlo, an associate professor in the Department of Environmental Health and Engineering at Johns Hopkins University Varsity. Good morning, professor. Good morning.",
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        "high": 0.32122030095136983
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  "iab_categories_result": {
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    "results": [
      {
        "text": "Smoke from hundreds of wildfires in Canada is triggering air quality alerts throughout the US. Skylines from Maine to Maryland to Minnesota are gray and smoggy. And in some places, the air quality warnings include the warning to stay inside. We wanted to better understand what's happening here and why, so we called Peter de Carlo, an associate professor in the Department of Environmental Health and Engineering at Johns Hopkins University Varsity. Good morning, professor. Good morning.",
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          },
          {
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          },
          {
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