How to integrate AssemblyAI MCP with Atomic Agent

Connect Atomic Agent to AssemblyAI MCP. Transcribe podcast episode and extract highlights, summarize customer call recording with chapters, and more using natural language, with authentication handled for you.

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AssemblyAI is a speech-to-text and audio intelligence API for uploaded or hosted media. Use it to turn audio and video into accurate transcripts, summaries, and insights.

9 Tools

Introduction

Atomic Agent is an open-source AI agent that runs on your machine and supports local models through llama.cpp. Connect it to 1,500+ apps through Composio, including AssemblyAI.

This guide uses Atomic Agent's built-in Composio integration. You need Atomic Agent v0.5.6 or later, your own Composio API key, and a AssemblyAI account. See the Atomic Agent documentation for installation instructions.

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How Atomic Agent connects to AssemblyAI

Atomic Agent connects to Composio's Tool Router over Streamable HTTP MCP. It discovers the tools needed for your request, and Composio handles account authentication.

Execution and account-connection tools follow Atomic Agent's configured approval policy. Review any approval prompt before allowing an action on your connected account.

Connect AssemblyAI to Atomic Agent

  1. Sign up or sign in to the Composio dashboard. Copy your API key.
  2. In Atomic Agent, open the Integrations tab and select Composio. Select API key, press e, paste the key, and press Enter. The tools become available immediately, without a restart.
  3. Ask Atomic Agent to do something in AssemblyAI. It searches Composio for the right tool.
  4. On first use, open the sign-in link returned in the chat. Connect your AssemblyAI account, then return to Atomic Agent to continue.

Headless setup

Add the following line to ~/.atomic-agent/.env, replacing YOUR_COMPOSIO_API_KEY with your key. Start Atomic Agent after saving the file.

bash
COMPOSIO_API_KEY=YOUR_COMPOSIO_API_KEY

What is the AssemblyAI MCP server, and what's possible with it?

The AssemblyAI MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your AssemblyAI account. It provides structured and secure access so your agent can perform AssemblyAI operations on your behalf.

Use AssemblyAI from Atomic Agent

With your account connected, ask Atomic Agent to work with AssemblyAI in natural language. You can connect more apps through the same Composio integration as you need them.

Visit the Atomic Agent website or inspect the Atomic Agent source code.

Troubleshooting

Why is my API key rejected?

Copy the key directly from the Composio dashboard. Atomic Agent requires ASCII characters because it sends the key in an HTTP header. Remove any extra characters introduced when copying.

Why are Composio tools unavailable after saving a key?

Check that you use Atomic Agent v0.5.6 or later and that Composio is enabled in your configuration. A "composio": { "enabled": false } setting disables the integration while keeping the saved key on disk.

Does Composio have a free plan?

The Hobby plan includes 100,000 tool calls per month. Composio-managed OAuth apps have a lower included allowance. See Composio pricing for the current limits that apply to your connection.

TOOLS

Supported Tools

Every AssemblyAI action and event your agent gets out of the box.

Delete Transcript Content

Irreversibly delete a transcript's stored content.

Export Subtitles

Export a completed transcript as raw SRT or WebVTT subtitle text.

Get Redacted Audio

Get the processing status and short-lived signed download URL for PII-redacted audio.

Get Transcript

Retrieve an AssemblyAI transcript's current state and results, optionally waiting until asynchronous processing completes or fails.

Get Transcript Segments

Return sentence- or paragraph-level segments, timestamps, confidence, and words for a completed transcript.

List Transcripts

List project transcripts from the last 90 days, newest first, with optional filters and a cursor for the next older page.

Search Transcript

Find words or phrases in a completed transcript and return occurrence counts and timestamps.

Submit Transcript

Queue an asynchronous pre-recorded transcription from a reachable media URL.

Upload Media

Upload an audio or video file to AssemblyAI and return the project-private URL to use when submitting a transcript.

FAQ

Frequently asked questions

With a standalone AssemblyAI MCP server, the agents and LLMs can only access a fixed set of AssemblyAI tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from AssemblyAI and many other apps based on the task at hand, all through a single MCP endpoint.

Yes, you can. Atomic Agent fully supports MCP integration. You get structured tool calling, message history handling, and model orchestration while Tool Router takes care of discovering and serving the right AssemblyAI tools.

Yes, absolutely. You can configure which AssemblyAI scopes and actions are allowed when connecting your account to Composio. You can also bring your own OAuth credentials or API configuration so you keep full control over what the agent can do.

All sensitive data such as tokens, keys, and configuration is fully encrypted at rest and in transit. Composio is SOC 2 Type 2 compliant and follows strict security practices so your AssemblyAI data and credentials are handled as safely as possible.

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