Speechmatics for AI agents
Multilingual speech-to-text API.
What your agent can do with Speechmatics
Speechmatics: multilingual speech-to-text API. Through AMXP your agent calls it like any other tool: no Speechmatics account, no separate API key and no extra subscription. The call is priced up front and paid from your AMXP balance.
Speechmatics is on the AMXP roadmap and not callable yet. Everything on this page describes how it will work once its connector ships.
How to call it
The same three calls work for every provider. Your agent does this on its own once AMXP is installed.
// Find the right Speechmatics endpoint, check its price, then run it.
const [tool] = await amxp.discover({ provider: "speechmatics" })
const spec = await amxp.inspect(tool.id) // parameters, price per call
const result = await amxp.execute(tool.id, { /* params from spec */ })What Speechmatics charges
$0.12 / hr (Melia 1 pre-recorded); TTS $0.011 per 1,000 characters
- Model
- Subscription + usage
- Currency
- USD
- Free tier
- Yes
$100 in sign-up credits (no card), 2 concurrent real-time sessions; API paused when credits run out
Prices as of 2026-11-02, source: https://speechmatics.com/pricing.
Pricing through AMXP
0% markup, pay per call. Your agent sees Speechmatics's own price from amxp.inspect() before it runs anything, the amount is reserved from your balance, and only the real cost is settled. No monthly fee, no Speechmatics account. How pricing works
Alternatives in Speech & Voice
Your agent can compare these by fit and price with amxp.discover() and pick per task.
- AssemblyAISpeech-to-text and audio intelligence API.
- CartesiaLow-latency TTS, STT and voice agents.
- DeepgramSpeech-to-text and text-to-speech APIs.
- ElevenLabsText to speech and voice cloning.
- Fish AudioText to speech and voice cloning.
- GladiaAsync and realtime transcription API.
- Inworld TTSExpressive text-to-speech API.
- Rev.aiSpeech-to-text API from Rev.
- SonioxSpeech-to-text in many languages.
