Castingwords MCP for AI Agents

Securely connect your AI agents and chatbots (Claude, ChatGPT, Cursor, etc) with Castingwords MCP or direct API to upload audio files, check transcription job status, fetch finalized transcripts, and manage your transcription queue through natural language.

Castingwords logoCastingwords
Api Key

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

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TOOL ROUTER PLAYGROUND
Castingwords
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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.

SETUP GUIDE

Connect Castingwords MCP Tool with your Agent

1

Install Composio

typescript
npm install @composio/core ai @ai-sdk/openai @ai-sdk/mcp
Install the Composio SDK and Claude Agent SDK
2

Create Tool Router Session

typescript
import { Composio } from '@composio/core';

const composio = new Composio({ apiKey: 'your-api-key' });

console.log("Creating Tool Router session...");
const { mcp } = await composio.create('your-user-id');
console.log(`Tool Router session created: ${mcp.url}`);
Initialize the Composio client and create a Tool Router session
3

Connect to AI Agent

typescript
import { openai } from '@ai-sdk/openai';
import { experimental_createMCPClient as createMCPClient } from '@ai-sdk/mcp';
import { generateText, stepCountIs } from 'ai';

const client = await createMCPClient({
  transport: {
    type: 'http',
    url: mcp.url,
    headers: { 'x-api-key': 'your-composio-api-key' }
  }
});

const tools = await client.tools();

const { text } = await generateText({
  model: openai('gpt-4o'),
  tools,
  messages: [{ role: 'user', content: 'Order a transcript for https://my-audio-file.com/audio.mp3' }],
  stopWhen: stepCountIs( 5 )
});

console.log(`Agent: ${text}`);
Use the MCP server with your AI agent
SETUP GUIDE

Connect Castingwords API Tool with your Agent

1

Install Composio

typescript
npm install @composio/openai
Install the Composio SDK
2

Initialize Composio and Create Tool Router Session

typescript
import OpenAI from 'openai';
import { Composio } from '@composio/core';
import { OpenAIResponsesProvider } from '@composio/openai';

const composio = new Composio({
  provider: new OpenAIResponsesProvider(),
});
const openai = new OpenAI({});
const session = await composio.create('your-user-id');
Import and initialize Composio client, then create a Tool Router session
3

Execute Castingwords Tools via Tool Router with Your Agent

typescript
const tools = session.tools;
const response = await openai.responses.create({
  model: 'gpt-4.1',
  tools: tools,
  input: [{
    role: 'user',
    content: 'Order a transcript for this podcast episode URL'
  }],
});
const result = await composio.provider.handleToolCalls(
  'your-user-id',
  response.output
);
console.log(result);
Get tools from Tool Router session and execute Castingwords actions with your Agent

Why Use Composio?

AI Native Castingwords Integration

  • Supports both Castingwords MCP and direct API based integrations
  • Structured, LLM-friendly schemas for reliable tool execution
  • Rich coverage for uploading audio, tracking jobs, and retrieving transcripts

Managed Auth

  • Built-in API key management with automatic rotation
  • Central place to manage, scope, and revoke Castingwords access
  • Per user and per environment credentials instead of hard-coded keys

Agent Optimized Design

  • Tools are tuned using real error and success rates to improve reliability over time
  • Comprehensive execution logs so you always know what ran, when, and on whose behalf

Enterprise Grade Security

  • Fine-grained RBAC so you control which agents and users can access Castingwords
  • Scoped, least privilege access to Castingwords resources
  • Full audit trail of agent actions to support review and compliance
FAQ

Frequently asked questions

Yes, Castingwords requires you to configure your own API key credentials. Once set up, Composio handles secure credential storage and API request handling for you.

Yes! Composio's Tool Router enables agents to use multiple toolkits. Learn more.

Composio is SOC 2 and ISO 27001 compliant with all data encrypted in transit and at rest. Learn more.

Composio maintains and updates all toolkit integrations automatically, so your agents always work with the latest API versions.

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Managed auth, hosted MCP servers, and every Castingwords tool your agent needs.Free to start.

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