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How to connect Castingwords to Claude

Connect Claude Web, Desktop and Cowork to Castingwords MCP. Transcribe this podcast episode from its url, check your available transcription balance now, and more using natural language, with authentication handled for you.

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CastingWords is a transcription service specializing in human-powered, accurate transcripts via a simple API. Get seamless audio-to-text conversion for interviews, meetings, podcasts, and more.

9 Tools

Introduction

Claude is Anthropic's AI assistant, available on the web, in the desktop app, and on mobile. Cowork is its agent for knowledge work, and it runs on all of those surfaces too. Connected to your apps, Claude can work with your files and services to accomplish complex tasks on your behalf.

This guide walks you through the easiest and most secure way to connect your Castingwords account to Claude via Composio Connect, enabling it to transcribe this podcast episode from its URL, check your available transcription balance now, order timestamps upgrade for file 12345, and more such actions on your behalf without compromising your account security.

Setup is the same on Claude Web, Desktop, and Cowork, and you only need to do it once. The connector is tied to your account, so it's available in all three.

Also integrate Castingwords with

OpenAI Agents SDKClaude Agent SDKClaude CodeCodexOpenClawHermesAtomic AgentGoogle ADKLangChainVercel AI SDKMastra AILlamaIndexCrewAIPydantic AIAutoGen

Connecting Castingwords to Claude Web, Desktop, and Cowork

Two ways to add the Composio connector. Pick whichever you prefer.

1. Add with one click

Click the button. Claude opens with the Composio connector filled in. Click Add, then go to step 2.

Add to Claude

Add manually

In Claude Desktop, click Customize in the left sidebar, then select Connectors and click the + icon at the top.

Claude Desktop connectors screen with Add custom connector selected

Click Add custom connector and paste in the Composio MCP server URL:

bash
https://connect.composio.dev/mcp
Add custom connector dialog with Composio MCP server URL

2. Authorize in your browser

Click Connect. You'll be redirected to a browser window where you can authorize Composio to continue.

Composio authorization screen for Claude Web, Desktop, and Cowork

3. Connect your Castingwords account

Back in Claude, ask it to connect to Castingwords or give it any Castingwords-related task.

For example, ask Claude to:

  • "Transcribe this podcast episode from its URL"
  • "Check your available transcription balance now"
  • "Order timestamps upgrade for file 12345"

It will prompt you to authenticate and authorize access.

That's it. Composio's tools are now available in Claude, and your Castingwords account is ready to use.

What is the Castingwords Claude Connector, and what's possible with it?

The Castingwords MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Castingwords account. It provides structured and secure access to transcription services, so your agent can place new orders, check account balances, manage webhooks, and upgrade or refund audio files on your behalf.

  • Seamless transcription ordering: Let your agent initiate new audio or video transcription jobs using just a media URL—no manual uploads needed.
  • Account balance and SKU checks: Effortlessly retrieve your prepay balance or list available transcription services and pricing before placing orders.
  • Webhook management and testing: Register, verify, and test webhooks to automatically receive transcript completion notifications in your own systems.
  • Transcription order management: Upgrade completed jobs (for example, to add timestamps), or cancel and refund audio files before work begins if needed.

Troubleshooting

1. Why does Claude not use the Composio connector for Castingwords?

The connector can show as connected, but Claude must use it in each Castingwords conversation.

  • Click + at the lower left of the chat, or type /.
  • Hover Connectors.
  • Turn on Composio.
  • Ask Claude to connect to Castingwords again.

2. Why does Claude show an MCP server error before Castingwords connects?

Claude can show Couldn't reach the MCP server or Authorization with the MCP server failed when you add the connector for Castingwords.

  • Check that the connector URL is https://connect.composio.dev/mcp.
  • Connectors run from Anthropic's cloud, so your device network is usually not the problem.
  • Add the connector again from Customize > Connectors, then ask Claude to connect Castingwords.
  • If it fails again, send the error and the ofid_ reference id to support@composio.dev.

3. Why does the Castingwords authorization link not work?

The Composio connector is one server. Your Castingwords account connects separately when Claude asks for it.

  • If the browser does not open, or the link expires, ask Claude to retry the Castingwords connection.
  • Composio creates a fresh Castingwords authorization link.
  • Open that link in your browser and finish the Castingwords sign-in.

4. Why do Castingwords actions fail after they worked before?

The Castingwords connection can expire or lose permission.

  • Ask Claude to inspect the Castingwords connection.
  • If the connection is unhealthy, disconnect it when Claude prompts you.
  • Reconnect the Castingwords account and retry the action.
  • If Claude shows a permission prompt, approve it before Claude changes data in Castingwords.
  • If the action still fails with a permission error, check that the connected account has that permission in Castingwords itself.

5. How do I switch to a different Castingwords account?

Claude can manage the Castingwords connection for you.

  • Ask Claude to disconnect or delete the current Castingwords account.
  • Ask Claude to connect Castingwords again.
  • Open the new Composio authorization link for Castingwords.
  • Sign in with the other Castingwords account in the browser.
  • After the account connects, ask Claude to retry the Castingwords task.

6. Why is my Castingwords connection missing in Claude Desktop or on a Team plan?

The connector belongs to your Claude account, so your Castingwords connection works in Claude Web, Desktop, and Cowork.

  • In Claude Desktop, open Customize > Connectors.
  • Next to Composio, click ⋮ and click Clear cache.
  • If Castingwords tools still do not appear, click ⋮, disconnect, remove the connector, and add it again.
  • On Team or Enterprise, an Owner or Primary Owner must enable the connector before you can connect Castingwords.
TOOLS

Supported Tools

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

Cancel and Refund Audio File

Tool to cancel an ordered audio file and issue a refund if applicable.

Get Prepay Balance

Tool to retrieve the current prepay balance for the account.

Get Transcript

Tool to retrieve the transcript for a given audiofile in the requested format (txt, doc, rtf, or html).

Get registered webhook URL

Tool to retrieve the currently registered webhook URL for account notifications.

Order Transcript

Create a transcription order for audio/video files at publicly accessible URLs.

Order Upgrades

Tool to order an upgrade for a specific audio file.

Register Webhook

Registers a webhook URL to receive CastingWords event notifications.

List Available SKUs

Retrieves all available CastingWords transcription service SKUs with pricing.

Test Webhook Call

Tool to request a test webhook call for a specific event type.

FRAMEWORKS

How to build Castingwords MCP Agent with another framework

OpenAI Agents SDK logo

OpenAI Agents SDK

Use Castingwords MCP with OpenAI Agents SDK

Claude Agent SDK logo

Claude Agent SDK

Use Castingwords MCP with Claude Agent SDK

Claude Code logo

Claude Code

Use Castingwords MCP with Claude Code

Codex logo

Codex

Use Castingwords MCP with Codex

OpenClaw logo

OpenClaw

Use Castingwords MCP with OpenClaw

Hermes logo

Hermes

Use Castingwords MCP with Hermes

Atomic Agent logo

Atomic Agent

Use Castingwords MCP with Atomic Agent

Google ADK logo

Google ADK

Use Castingwords MCP with Google ADK

LangChain logo

LangChain

Use Castingwords MCP with LangChain

Vercel AI SDK logo

Vercel AI SDK

Use Castingwords MCP with Vercel AI SDK

Mastra AI logo

Mastra AI

Use Castingwords MCP with Mastra AI

LlamaIndex logo

LlamaIndex

Use Castingwords MCP with LlamaIndex

CrewAI logo

CrewAI

Use Castingwords MCP with CrewAI

Pydantic AI logo

Pydantic AI

Use Castingwords MCP with Pydantic AI

AutoGen logo

AutoGen

Use Castingwords MCP with AutoGen

FAQ

Frequently asked questions

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

Yes, you can. Claude Cowork 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 Castingwords tools.

Yes, absolutely. You can configure which Castingwords 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 Castingwords data and credentials are handled as safely as possible.

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