Nexari Speech-to-Text with Speaker Diarization (30 min)

x402

Nexari Speech-to-Text with Speaker Diarization (30 min) is a paid API for AI agents from x402.nexari.cloud, paid per call via x402, $0.6/call, status unknown (last checked 2026-10-02).

Transcribes audio files up to 30 minutes with speaker separation (diarization) using pyannote + Whisper, optimized for German, processed in Germany under GDPR.

Price / call$0.6

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StatusUnknown

How this service works

Transkription mit Sprechertrennung bis 30 Min Audio (pyannote + Whisper), verarbeitet in Deutschland. Speech-to-text with speaker diarization for audio up to 30 min, German-optimised, processed in Germany. Voraussetzung/required: accept_terms_hash, business_name (B2B) – /legal/terms.json

Output

A structured transcript with speaker-separated segments, each labeled by speaker identifier (e.g. SPEAKER_00, SPEAKER_01), including text and timing information for each turn. Output covers the full audio up to 30 minutes with improved accuracy when the number of speakers is provided.

Example use cases

Meeting minutes with speaker attribution

“I have a 28-minute board meeting recording in German with 4 speakers — can you transcribe it and label each speaker's turns? The file is at https://files.example.com/board-meeting.m4a and my company is Müller AG.”

Podcast interview transcription

“Please transcribe this 22-minute German podcast interview between 2 people and show me who said what throughout — the audio URL is https://cdn.podcast.example.com/episode42.m4a. We're a media company called Redaktions GmbH.”

Legal deposition audio to labeled transcript

“I need a full speaker-labeled transcript of this 30-minute deposition audio in German — there are 3 speakers: a lawyer, a witness, and a judge. The file is at https://secure.lawfirm.example.com/deposition-2024.m4a and the business name is Kanzlei Becker & Partner.”

Technical details

Endpoint

POSThttps://x402.nexari.cloud/transcribe/30min/speakers?utm_source=zero.xyz

When to prefer

Choose this endpoint when you need speaker-attributed transcription for German or multilingual audio files up to 30 minutes long, require GDPR-compliant processing in Germany, and need diarization (who said what) rather than plain transcription. Prefer the 10-minute or 2-minute variants for shorter audio to reduce cost. Use the plain transcription endpoints (without /speakers) when speaker separation is not needed.

Side effects

Audio exceeds 30-minute limit — request rejected
Invalid or inaccessible audio URL — download fails
Missing accept_terms_hash or business_name — request rejected as B2B terms not accepted
Unsupported audio format or corrupt file — transcription fails
num_speakers out of range (must be 1-10) — validation error
Payment not included or insufficient — HTTP 402 returned
Audio language mismatch with specified language code — reduced accuracy

Input

Schema · Request body

Field	Type	Description
filename	string	Dateiname mit Endung, z. B. memo.m4a
language	string	de (Standard), en, auto ...
audio_url	string	HTTPS-URL der Audiodatei / public URL of the audio file
audio_base64	string	Audio als Base64 / audio as base64
num_speakers	integer	Nur /speakers: bekannte Sprecherzahl (1-10), verbessert die Trennung
business_name	string	Unternehmen, für das gehandelt wird (nur B2B)
privacy_contact	string	E-Mail für Datenschutz-Meldungen (Art. 33 DSGVO)
accept_terms_hash	string	SHA-256 der AGB aus /legal/terms.json

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