supermarket

Transcribe audio

AssemblyAI

Speech-to-text API that transcribes recorded and live audio into text with word timestamps, speaker labels and analysis options.

At a glance

Provider
AssemblyAI
Category
Transcribe audio
Type
Hosted API
Pricing model
Pay as you go, per hour of audio5
Free tier
$50 in free credits, no card1
Authentication
API key; account sign-in or API key for the MCP server6
Connect via
REST API, WebSocket streaming, MCP server, Python and JavaScript SDKs7
Read from the provider's pages
2026-11-04
Pricing
  • Pricing model: Pay as you go, per hour of audio submitted; streaming per hour the connection is open
  • Free tier: $50 in free credits for pre-recorded and real-time speech-to-text, Speech Understanding and Guardrails; credits do not expire
  • Card required for free tier: No
Pricing in full →Tools
  • Official MCP server: Yes, remote
  • Address or package: https://mcp.assemblyai.com/mcp (Streamable HTTP, transcribes and analyzes audio); https://www.assemblyai.com/docs/mcp (docs search only)
  • Docs MCP server purpose: Searches and reads the docs; does not transcribe
Tools in full →Authentication
  • Who creates the account: A person signs in to the AssemblyAI dashboard; the docs do not say whether an agent can sign up alone
  • Where to get a key: The dashboard, API keys page
  • Other requirements: A credit card once the free credits are used up
Authentication in full →Setup
  • REST API: https://api.assemblyai.com (US); https://api.eu.assemblyai.com (EU)
  • MCP server: https://mcp.assemblyai.com/mcp
  • OpenAPI spec: https://www.assemblyai.com/docs/openapi.yaml
Setup in full →Limits
  • Parallel transcriptions, free: 5
  • Parallel transcriptions, paid: 200+; extra jobs are queued
  • New streaming sessions per minute, free: 5
Limits in full →Privacy
  • Data location: US by default; EU endpoint processes audio and transcripts in the EU at the same price
  • Retention: Pre-recorded audio: deletion begins at 24 hours and finishes within 48 hours, unless a TTL or BAA applies
  • Retention, transcripts: Pre-recorded transcripts: deletion begins at 30 days
Privacy in full →

Read from AssemblyAI’s own pages on 2026-11-04. Every number links to the page a value came from. For agents, the same facts as markdown: /tools/transcribe-audio/assemblyai.md