HALOWERK Speech Coach

x402

HALOWERK Speech Coach is a paid API for AI agents from medien.halowerk.com, paid per call via x402, $0.025/call, status unknown (last checked 2026-10-31).

Analyzes an audio recording of a talk or pitch and returns detailed delivery metrics including speaking rate, filler/hedge words, pauses, sentence length, and recurring phrases.

Price / call$0.025

Seller volume →—

Success—

StatusUnknown

How this service works

Takes a recording of a talk, pitch, lesson or rehearsal of up to 30 minutes and returns delivery metrics computed from word timestamps: words per minute overall and for every minute, filler words (uh, um, äh, ähm) and hedge words (basically, actually, eigentlich, sozusagen) per minute with their most frequent forms, pauses over one second with position, average and longest sentences, and phrases of three or more words that recur.

Output

Returns a structured report with: overall and per-minute words-per-minute rate, filler word (uh, um, äh, ähm) and hedge word (basically, actually, eigentlich, sozusagen) counts per minute with their most frequent forms, a list of pauses exceeding one second with their positions in the recording, average and longest sentence lengths, and a list of three-or-more-word phrases that recur across the talk. Optionally includes coaching tips.

Example use cases

Startup pitch rehearsal feedback

“I just recorded a 15-minute run-through of my startup pitch — can you analyze it for filler words, speaking pace per minute, and any phrases I keep repeating? The file is at https://drive.example.com/pitch-rehearsal.mp3 and I want the feedback in English.”

University lecture delivery review

“I recorded a 25-minute lecture in German — can you check how fast I'm speaking, how often I use hedge words like 'eigentlich' or 'sozusagen', and flag any pauses over a second? Here's the URL: https://uni-recordings.example.com/vorlesung7.mp3. Please give me the report in German.”

Sales presentation coaching

“Here's a base64 of my 8-minute sales demo recording — I want to see my words-per-minute breakdown, filler word counts, my longest sentences, and any phrases I repeat more than twice. Feedback in Spanish please, and bill me for 8 minutes.”

Technical details

Endpoint

POSThttps://medien.halowerk.com/v1/speech-coach?utm_source=zero.xyz

When to prefer

Choose this endpoint when you need quantitative, timestamped delivery metrics for a spoken recording — especially filler/hedge word counts, per-minute pacing, and pause detection. It is ideal for coaching workflows, rehearsal feedback loops, or pre-presentation self-assessment. Prefer it over generic transcription services when the goal is behavioral speech analytics rather than just a transcript.

Side effects

Audio file exceeds 30-minute duration limit — billing and processing rejected
Invalid or inaccessible URL for the audio source — returns fetch error
base64 payload too large — use URL instead for files over ~9MB
Unsupported audio format — transcription fails
duration_minutes mismatch causes incorrect billing
Language detection fails for unclear or multilingual audio
Payment of 0.025 USDC not fulfilled — x402 payment required error

Input

Schema · Request body

Field	Type	Description
source	object	The recording. Either url or content_base64.
language	string	Spoken language (BCP-47). Omit to detect.
skip_tips	boolean
duration_minutes	integer	Length in started minutes — this is what you are billed for.
feedback_language	string

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