CallOnTheGo MCP server for AI agents and assistants

Securely connect your AI agents and chatbots (Claude, ChatGPT, Cursor, etc) with CallOnTheGo MCP or direct API to manage phone numbers, update caller IDs, maintain suppression lists, upload audio assets, and launch Voice AI campaigns through natural language.

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CallOnTheGo

Api Key

CallOnTheGo is a telephony API for managing phone numbers, caller IDs, suppression lists, audio assets, contact lists, and Voice AI campaigns. It provides programmatic control over calling infrastructure and campaign automation for scalable voice outreach.

29 Tools

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TOOL ROUTER PLAYGROUND

CallOnTheGo

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TOOLS

Supported Tools

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

Add Suppression Entry

Idempotently add one phone number to the Do-Not-Call list.

Cancel Campaign

Irreversibly cancel a campaign and mark its queued or pending recipients cancelled.

Create Caller ID

Add a caller ID and initiate a telecom-provider verification call to confirm ownership.

Create Campaign

Create a draft Voice AI campaign from explicit caller ID, contact list, and audio resources.

Delete Caller ID

Permanently remove an owned caller ID configuration.

Delete Phone Number

Permanently remove an owned phone-number configuration by ID; deleting a missing ID also reports success.

Get Campaign

Get one campaign's configuration, lifecycle state, resource names, delivery metrics, and cost metrics.

Get Dashboard Stats

Return account-level call, contact, group, list, success-rate, and recent-activity summary metrics.

Get Voice Readiness

Return runtime readiness, telecom provider assignment, and supported capabilities for diagnosing whether voice campaigns can run.

Launch Campaign

Validate compliance, provision telecom isolation if needed, and launch a campaign.

List Audio Assets

List campaign audio assets with playback, duration, transcript, and compliance details.

List Caller IDs

List owned caller IDs with ownership-verification status and inbound-campaign assignment.

List Calls

Return one page of account call records for outcome and duration review, with an opaque cursor for the next page.

List Campaign Events

List only the newest 100 delivery events for a campaign, ordered newest first.

List Campaign Recipients

List all recipients for a campaign with call status, attempts, machine detection, and cost estimates.

List Campaigns

List Voice AI campaigns with lifecycle state, linked resources, calling window, rate, estimated cost, compliance state, and timestamps.

List Contact Lists

List campaign contact lists with valid, invalid, suppressed, and total recipient counts.

List Contacts

Return one page of contacts from the connected CallOnTheGo account for CRM lookup, with an opaque cursor for the next page.

List Phone Numbers

List phone numbers owned by the connected CallOnTheGo account, including the resource records needed to identify numbers for later management.

List Suppression Entries

List Do-Not-Call suppression entries for the connected account.

Pause Campaign

Pause a running campaign while retaining its pending recipients for a later resume.

Queue Campaign Lead

Queue one phone-number lead for dialing by a running campaign.

Resume Campaign

Resume a paused campaign and immediately requeue its pending recipients for calls.

Set Caller ID Inbound Campaign

Set or clear the preferred inbound campaign assigned to an owned caller ID.

Update Campaign

Update selected configuration fields on a draft or paused campaign.

Upload Audio Asset

Upload an MP3 or WAV file as a reusable campaign audio asset.

Upload Contact List

Create a campaign contact list from a CSV file.

Upload Suppression CSV

Persistently add many phone numbers to the Do-Not-Call list from a CSV file.

Verify Caller ID

Submit an ownership-verification code for an existing caller ID and return whether it became verified or remains pending.

SETUP GUIDE

Connect CallOnTheGo MCP Tool with your Agent

Install Composio

typescript

npm install @composio/core ai @ai-sdk/mcp @ai-sdk/openai

Install the Composio SDK and your agent framework

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: ["callonthego"],
  mcp: true,
});

Create a session scoped to CallOnTheGo and read its MCP URL and headers

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: "List active phone numbers and statuses",
  stopWhen: stepCountIs(10),
});

console.log(text);
await client.close();

Pass the session's MCP URL and headers to your agent and run a CallOnTheGo request

SETUP GUIDE

Connect CallOnTheGo API Tool with your Agent

Install Composio

typescript

npm install @composio/core @composio/openai openai

Install the Composio SDK, the OpenAI provider, and the OpenAI SDK

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: ["callonthego"] });
const tools = await session.tools();

Initialize Composio with the OpenAI Responses provider and create a session scoped to CallOnTheGo

Run CallOnTheGo tools with your agent

typescript

let response = await client.responses.create({
  model: "gpt-5.6-sol",
  tools,
  input: [{ role: "user", content: "List active phone numbers and statuses" }],
});

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 CallOnTheGo tool calls through the session, and print the final answer

Why Use Composio?

AI Native CallOnTheGo Integration

Supports both CallOnTheGo MCP and direct API based integrations
Structured, LLM-friendly schemas for reliable tool execution
Rich coverage for reading, writing, and querying your CallOnTheGo data

Managed Auth

Built-in OAuth handling with automatic token refresh and rotation
Central place to manage, scope, and revoke CallOnTheGo 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 CallOnTheGo
Scoped, least privilege access to CallOnTheGo resources
Full audit trail of agent actions to support review and compliance

FRAMEWORKS

Use CallOnTheGo with any AI Agent Framework

Choose a Framework you want to connect CallOnTheGo with

ChatGPT

Use CallOnTheGo MCP with ChatGPT

Claude Cowork

Use CallOnTheGo MCP with Claude Cowork

Hermes

Use CallOnTheGo MCP with Hermes

Atomic Agent

Use CallOnTheGo MCP with Atomic Agent

Rolling this out across your team?

Give your team centralized access control across every framework with Composio’s MCP Gateway.

EXPLORE MCP GATEWAY

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FAQ

Frequently asked questions

Yes, CallOnTheGo 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.

Yes. Composio is SOC 2 Type II compliant and is built to keep your CallOnTheGo 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 CallOnTheGo account settings, then paste it once on Composio's connection page. Composio stores it encrypted and uses it only for the CallOnTheGo actions your agent runs. Nobody else in your workspace can read it, and you can revoke it inside CallOnTheGo at any time.

When you connect a CallOnTheGo account through Composio, every action runs under that account, so anything the agent creates, sends, or changes shows up in CallOnTheGo 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 CallOnTheGo. If CallOnTheGo 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 CallOnTheGo 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 CallOnTheGo 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 CallOnTheGo rejects the old key. Create a new key in CallOnTheGo and reconnect the account from the Composio dashboard or by asking your agent to reconnect CallOnTheGo. Nothing else changes.

Composio's free Hobby plan includes 100,000 tool calls per month with no credit card, which covers most personal CallOnTheGo use. Paid plans add higher limits and team features. Your CallOnTheGo 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 CallOnTheGo accounts).

With Composio, you connect CallOnTheGo 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.

Start with CallOnTheGo.It takes 30 seconds.

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

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CallOnTheGo MCP server for AI agents and assistants

Try CallOnTheGo now

Supported Tools

Connect CallOnTheGo MCP Tool with your Agent

Install Composio

Create a session with MCP enabled

Connect your agent to the MCP server

Connect CallOnTheGo API Tool with your Agent

Install Composio

Create a Composio session

Run CallOnTheGo tools with your agent

Why Use Composio?

AI Native CallOnTheGo Integration

Managed Auth

Agent Optimized Design

Enterprise Grade Security

Use CallOnTheGo with any AI Agent Framework

ChatGPT

Claude Cowork

Hermes

Atomic Agent

Rolling this out across your team?

Explore Other Toolkits

Gmail

Outlook

Slack

Gong

Frequently asked questions

Do I need my own developer credentials to use CallOnTheGo with Composio?+

Can I use multiple toolkits together?+

Is Composio secure with my CallOnTheGo account?+

What if the API changes?+

Where do I get a CallOnTheGo API key, and who can see it?+

Does the agent act as me inside CallOnTheGo?+

Which CallOnTheGo permissions does the agent get?+

Can I use multiple CallOnTheGo accounts with Claude and ChatGPT?+

What happens if I rotate or revoke my CallOnTheGo API key?+

Does using CallOnTheGo through Composio cost extra?+

How is Composio different from the CallOnTheGo connectors already built into Claude and ChatGPT?+

Start with CallOnTheGo.It takes 30 seconds.