Gradium MCP server for AI agents and assistants

Securely connect your AI agents and chatbots (Claude, ChatGPT, Cursor, etc) with Gradium MCP or direct API to generate speech, transcribe audio, manage voices, and refine pronunciations through natural language.

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Api Key

Gradium is a low-latency voice AI platform for speech generation, transcription, voice management, and pronunciation tools. Use it to build real-time voice apps with fast, natural audio workflows.

9 Tools

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Type what you want done — sign in and watch it run live in the Tool Router playground.

TOOL ROUTER PLAYGROUND
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TOOLS

Supported Tools

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

Create Pronunciation Dictionary

Create a language-specific pronunciation dictionary with optional rewrite rules.

Delete Pronunciation Dictionary

Permanently delete one pronunciation dictionary by UID.

Get Credits

Get the connected Gradium subscription's current credit balance and billing-period metadata.

Get Pronunciation Dictionary

Retrieve one pronunciation dictionary and its complete rewrite rule set by UID.

Get Usage Summary

Retrieve aggregate Gradium session, message, text, audio-duration, and consumed-credit usage totals.

Get Voice

Retrieve metadata for one Gradium catalog or custom voice by its UID.

List Pronunciation Dictionaries

List pronunciation dictionaries for the connected organization, optionally filtered by language.

List Voices

List custom voices and, by default, Gradium's public voice catalog, returning voice IDs and metadata for later selection.

Update Pronunciation Dictionary

Update pronunciation dictionary metadata and optionally replace its complete rewrite rule set.

SETUP GUIDE

Connect Gradium MCP Tool with your Agent

1

Install Composio

typescript
npm install @composio/core ai @ai-sdk/mcp @ai-sdk/openai
Install the Composio SDK and your agent framework
2

Create a session with MCP enabled

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

const composio = new Composio();
const { mcp } = await composio.create("your-user-id", {
  toolkits: ["gradium"],
  mcp: true,
});
Create a session scoped to Gradium and read its MCP URL and headers
3

Connect your agent to the MCP server

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

const client = await createMCPClient({
  transport: { type: "http", url: mcp.url, headers: mcp.headers },
});

const { text } = await generateText({
  model: openai("gpt-5.6-sol"),
  tools: await client.tools(),
  prompt: "Generate low-latency speech from this welcome script",
  stopWhen: stepCountIs(10),
});

console.log(text);
await client.close();
Pass the session's MCP URL and headers to your agent and run a Gradium request
SETUP GUIDE

Connect Gradium API Tool with your Agent

1

Install Composio

typescript
npm install @composio/core @composio/openai openai
Install the Composio SDK, the OpenAI provider, and the OpenAI SDK
2

Create a Composio session

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

const composio = new Composio({ provider: new OpenAIResponsesProvider() });
const client = new OpenAI();

const session = await composio.create("your-user-id", { toolkits: ["gradium"] });
const tools = await session.tools();
Initialize Composio with the OpenAI Responses provider and create a session scoped to Gradium
3

Run Gradium tools with your agent

typescript
let response = await client.responses.create({
  model: "gpt-5.6-sol",
  tools,
  input: [{ role: "user", content: "Generate low-latency speech from this welcome script" }],
});

while (response.output.some((o) => o.type === "function_call")) {
  const outputs = await composio.provider.handleToolCalls(session, response.output);
  response = await client.responses.create({
    model: "gpt-5.6-sol",
    tools,
    previous_response_id: response.id,
    input: outputs,
  });
}

console.log(response.output_text);
Send a request, execute the Gradium tool calls through the session, and print the final answer

Why Use Composio?

AI Native Gradium Integration

  • Supports both Gradium MCP and direct API based integrations
  • Structured, LLM-friendly schemas for reliable speech, transcription, voice, and pronunciation tasks
  • Rich coverage for building real-time voice workflows without writing custom Gradium glue code

Managed Auth

  • Secure API key handling so your agents never need hard-coded Gradium credentials
  • Central place to manage, scope, and revoke Gradium access
  • Per user and per environment credentials for cleaner, safer voice app deployments

Agent Optimized Design

  • Tools are tuned using real error and success rates to improve reliability over time
  • Comprehensive execution logs so you always know which Gradium action ran, when, and on whose behalf
  • Clear tool schemas help agents pick the right action for speech generation, transcription, and voice management

Enterprise Grade Security

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

Frequently asked questions

Yes, Gradium requires you to configure your own API key. 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.

Yes. Composio is SOC 2 Type II compliant and is built to keep your Gradium connection and credentials secure. OAuth tokens and API keys are encrypted, and sensitive customer data is protected at rest and in transit.

Composio also undergoes independent security testing and continuously monitors its systems for security threats. You can review the latest reports and policies in the Composio Trust Center.

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

Create the key in your Gradium account settings, then paste it once on Composio's connection page. Composio stores it encrypted and uses it only for the Gradium actions your agent runs. Nobody else in your workspace can read it, and you can revoke it inside Gradium at any time.

When you connect a Gradium account through Composio, every action runs under that account, so anything the agent creates, sends, or changes shows up in Gradium as done by you. Keep an approval step in your prompt for actions with side effects, such as sending or deleting, and have the agent draft first.

Whatever the credentials you connect allow inside Gradium. If Gradium lets you scope a key to specific permissions, create a scoped one so the agent can only do what you intend. You can revoke the key inside Gradium at any time.

Yes. Composio supports multiple connected accounts for the same app, and that works in Claude, ChatGPT, or any other assistant you connect through Composio. Give each Gradium connection a name such as work or personal, and the assistant uses the one you mention in the request. Each account keeps its own credentials and nothing is merged.

The connection stops working the moment Gradium rejects the old key. Create a new key in Gradium and reconnect the account from the Composio dashboard or by asking your agent to reconnect Gradium. Nothing else changes.

Composio's free Hobby plan includes 100,000 tool calls per month with no credit card, which covers most personal Gradium use. Paid plans add higher limits and team features. Your Gradium plan and its API limits still apply as usual.

Built-in connectors usually give one AI access to a limited set of apps. Many people use Composio because it lets their AI connect to more apps than it normally supports, or connect to multiple accounts for the same app (e.g. connect Claude to multiple Gradium accounts).

With Composio, you connect Gradium once and then use it across different AI assistants without setting it up separately in each one. Connect your apps to Composio once, then connect Composio to whichever AI you use, whether that's Claude, ChatGPT, Hermes, or your own custom assistant.

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