Piper Jarvis Text to Speech — Signature British AI Voice for Assistants

Give your AI assistant a signature voice: a polished, high-register British English narrator — one flat all-inclusive price, no subscriptions.

Built for AI agents, LLM pipelines, n8n / Zapier / Make automations and app prototyping. Pay only for successfully delivered audio.

Table of contents

• What can it do
• Who uses it
• Input fields
• How to use
• Output example
• Pricing
• Integrations and API
• Tips
• FAQ
• Related searches
• Disclaimer
• 中文说明

What can it do

✅ Convert plain text (1–2,000 Unicode code points per run) into speech ✅ One signature voice: en_GB-jarvis-high — a polished, high-register British English narrator, the classic "AI butler" character ✅ Returns a WAV audio clip plus SHA-256 checksum, byte size and expiry timestamp ✅ One flat all-inclusive price per started 1,000 characters — no start fee, no platform surcharge ✅ Charges only on successful, non-empty delivery — failed runs cost nothing ✅ Works with AI agents and LLM tools via standardized input/output

Who uses it

• AI agent developers who want a distinctive butler-style assistant voice
• Automation builders on n8n, Zapier, Make generating notifications, announcements or briefings
• App developers prototyping voice assistants and smart-home personality features
• Content creators producing narrator-style intros and explainers

Input fields

Field	Type	Required	Description
text	string	✅	Plain text to synthesize, 1–2,000 Unicode code points. Billing counts code points in started blocks of 1,000 ($0.01 per block, minimum one block).
voice	select	❌	Fixed to en_GB-jarvis-high. No cloning, no alternative voices, no model selectors.
acceptTerms	boolean	✅	Must be true: you agree to disclose synthetic speech and not impersonate or mislead.

How to use

1. Add your text — paste or send 1–2,000 characters.
2. Accept the synthetic-speech terms — set acceptTerms: true.
3. Run — the actor returns a signed HTTPS download URL (valid 24 hours), audio metadata and billing details in the Output tab and dataset.

Input example

{
  "text": "Good evening. All systems are operating normally.",
  "voice": "en_GB-jarvis-high",
  "acceptTerms": true
}

Output example

Real run output (abridged):

{
  "ok": true,
  "kind": "jarvis",
  "voice": "en_GB-jarvis-high",
  "charCount": 46,
  "duration": 3.8,
  "audioUrl": "https://minio.foxtools.de/...?X-Amz-Signature=...",
  "audioDelivery": "minio-presigned",
  "deliveryObjectKey": "foxo81/audio/....wav",
  "audioBytes": 335160,
  "audioSha256": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
  "expiresAt": "2026-09-19T12:00:00Z",
  "billingUnit": "text-1k-chars",
  "billingQuantity": 46,
  "billingCount": 1,
  "billingPriceUsdPerBlock": 0.01,
  "totalChargeUsd": 0.01,
  "billingIsAllInclusive": true
}

Pricing

$0.01 per started 1,000 characters — all-inclusive.

The math, shown plainly:

Characters	Blocks (ceil(chars/1000))	Cost
1–1,000	1	$0.01
1,001–2,000	2	$0.02
1,000,000	1,000	$10.00

One price covers speech synthesis, Apify platform usage, storage and audio delivery. Blocks are charged only for a successfully delivered, non-empty clip; failed runs cost $0.

Integrations and API

Sync run (get dataset items directly):

curl -X POST "https://api.apify.com/v2/acts/myagizm~piper-jarvis-text-to-speech/run-sync-get-dataset-items?token=YOUR_APIFY_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{"text":"Good morning. Here is your daily briefing.","acceptTerms":true}'

Async run:

curl -X POST "https://api.apify.com/v2/acts/myagizm~piper-jarvis-text-to-speech/runs?token=YOUR_APIFY_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{"text":"Systems nominal.","acceptTerms":true}'

n8n / Zapier / Make: use the Apify node, pick this actor, map your text field to text and set acceptTerms: true.

Tips

💡 Pair with a Whisper STT actor for full voice-loop assistants. 💡 Download the WAV before expiresAt (24 h) if you need a permanent copy. 💡 2,000 characters ≈ 2 minutes of narration — plan scripts accordingly.

FAQ

Q: What does the voice sound like? A polished, high-register British English narrator — the classic "AI butler" character, similar in spirit to a famous fictional assistant.

Q: Can I use other languages? This actor speaks English (en_GB). For 31 languages use our Supertonic 3 Text to Speech actor.

Q: Can I clone a voice? No. One curated preset keeps quality consistent.

Q: What audio format do I get? Uncompressed WAV via a signed HTTPS download URL, valid 24 hours.

Q: Do failed runs cost money? No.

Q: Can I use this commercially? Yes — disclose synthetic speech and do not impersonate real people.

Related searches

jarvis voice api · british tts api · ai butler voice · assistant voice api · english text to speech · piper tts · ai narrator api · butler ai voice · tts for n8n · smart home voice api

Disclaimer

Output is AI-generated speech. You are responsible for disclosing synthetic audio and for not using it to impersonate, defraud or mislead. We do not claim quality equivalence with any third-party service.

中文说明

Piper Jarvis 文字转语音 — 英式 AI 管家音色

为你的 AI 助手配一个标志性声音：高质感英式英语旁白 — 一个全包价，无订阅。

✅ 1–2000 字符/次，返回 WAV + 24 小时下载链接 ✅ 固定音色：en_GB-jarvis-high（英式管家风格） ✅ 计费：每 1,000 字符 $0.01，失败不收费

输入字段

字段	类型	必填	说明
text	string	✅	纯文本，1–2000 字符
voice	select	❌	固定 en_GB-jarvis-high
acceptTerms	boolean	✅	必须为 true

相关搜索

英式英语 TTS · AI 管家语音 · 旁白 API · 英语配音 API · n8n 语音