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AssemblyAI speech API

Speech-to-text and audio intelligence API. New accounts get $50 free credit without a card.

Researched · not yet run liveLast researched 25 October 2026 · AssemblyAI · provider site

Researched, not yet run live. Built from the provider’s official pages (linked below). A person hasn’t walked this flow end to end yet, so check each step against the source.
Do this with verapliJSON for agents

Steps

Steps marked “human step” are ones only you can do: verapli never signs in, submits, pays or accepts terms for you.

  1. Sign in or create a AssemblyAI account

    Sign in to AssemblyAI. If you have no account yet, you create it yourself; verapli does not create accounts.

    • Guided by hand
    • Human step: You sign in

    Where: https://www.assemblyai.com/dashboard/home

  2. Copy your API key

    Copy the API key from your dashboard and set it as ASSEMBLYAI_API_KEY.

    • Guided by hand
    • After: Sign in or create a AssemblyAI account

    verapli captures ASSEMBLYAI_API_KEY here by plain code: encrypted in your browser, never shown to AI.

    Where: https://www.assemblyai.com/dashboard/home

  3. Upgrade to pay-as-you-go (optional)optional

    Add a card to lift free-tier limits (5 parallel jobs free vs 200 paid).

    • Guided by hand
    • Human step: You add payment details
    • After: Copy your API key

Terms and gotchas

Plain-English summary, not legal advice. Each card links its source.

Can cost moneyThe rules say

Acceptable use

Prohibits unlawful use, child-safety violations, harassment, unauthorised impersonation, deception and misinformation, political interference and surveillance uses. [3]

What you end up with

Env varSecretFormatWhat it is
ASSEMBLYAI_API_KEYsecretAssemblyAI API key

Pricing

  • Free tier: $50 free credits, no credit card required.

Source [2]

For agents

The same entry as JSON: /api/v1/entries/assemblyai/api · requirements /api/v1/requirements/assemblyai/api · terms /api/v1/terms/assemblyai/api.

Remote MCP (read-only, no auth)
claude mcp add --transport http verapli https://verapli.com/mcp

> "What do I need for AssemblyAI speech API, and how long will it take?"
  → tools/call requirements { "provider_id": "assemblyai/api" }

Sources

  1. AssemblyAI docs - Transcribe an audio file API key on the dashboard; ASSEMBLYAI_API_KEY; packages assemblyai (Python, JS); 5 parallel jobs free, 200 paid · accessed 25 October 2026 · official
  2. AssemblyAI pricing $50 free credits, no credit card required; free tier streaming capped until upgrade · accessed 25 October 2026 · official
  3. AssemblyAI Acceptable Use Policy Prohibited uses including unlawful purposes, child safety, harassment, privacy and impersonation, deception, political interference, surveillance; AUP controls over TOS · accessed 25 October 2026 · official

Provider rules change. This page is generated from verapli registry version 2026.1025.387; spotted something out of date? Tell us. AssemblyAI is not affiliated with verapli.