# How to connect HLR Lookup with ChatGPT

```json
{
  "title": "How to connect HLR Lookup with ChatGPT",
  "toolkit": "HLR Lookup",
  "toolkit_slug": "hlr_lookup",
  "framework": "ChatGPT",
  "framework_slug": "chatgpt",
  "url": "https://composio.dev/toolkits/hlr_lookup/framework/chatgpt",
  "markdown_url": "https://composio.dev/toolkits/hlr_lookup/framework/chatgpt.md",
  "updated_at": "2026-10-29T05:32:38.629Z"
}
```

## Introduction

### How to connect HLR Lookup MCP with ChatGPT
[ChatGPT](https://chatgpt.com/) can take action across your apps and files, stay with a project for hours, and turn a goal into finished materials like sheets, slides, and docs, not just answers.
In this guide, I will explain the easiest and most secure way to connect your HLR Lookup account to ChatGPT via Composio Connect, so it can validate phone numbers, check carrier details, verify portability, check balances, and process bulk lookups through natural language commands without ever putting your account credentials at risk.

## Also integrate HLR Lookup with

- [Claude Cowork](https://composio.dev/toolkits/hlr_lookup/framework/claude-cowork)
- [Hermes](https://composio.dev/toolkits/hlr_lookup/framework/hermes-agent)
- [Atomic Agent](https://composio.dev/toolkits/hlr_lookup/framework/atomic-agent)

## TL;DR

### Why use Composio over default connectors?
- Apps with read and write access. Default connectors mostly can read your data. Composio's HLR Lookup integration lets ChatGPT take actions like creating drafts, sending updates, labeling records, and more.
- 1,500+ SaaS toolkits out of the box. Composio gives you instant access to a vast catalog of pre-built connectors, from Gmail and Slack to Notion, Linear, and Salesforce.
- One MCP server for every app. Connect any of your applications on demand through a single endpoint, rather than juggling a separate server for each app.
- Smart, context-aware tool loading. Unlike traditional MCP servers that dump every available tool into the LLM context window, Composio searches for and loads only the tools relevant to the task at hand.
- Cross-app automation. Chain actions across multiple apps in a single run - fetch a thread, summarize it in Notion, and post highlights to Slack without leaving the conversation.

## Connect HLR Lookup to ChatGPT

### Prerequisites
- A ChatGPT account. We will use the [ChatGPT desktop app](https://openai.com/chatgpt/download/), and the steps are the same on the web.
- Access to the HLR Lookup workspace you want to connect.
- [Composio plugin](https://dashboard.composio.dev/login?utm_source=toolkits&utm_medium=framework_template&utm_campaign=chatgpt&utm_content=composio_connect&next=%2F~%2Forg%2Fconnect%2Fclients%2Fchatgpt).
Note: Composio connects through OAuth. You will be asked to sign in and approve specific permissions. Review the permission screen carefully if you are using a work account.
### Step-by-step: Connect HLR Lookup to ChatGPT
### 1. Install the Composio plugin
Click the button. ChatGPT opens the Composio plugin page. Click Install plugin.
[Install in ChatGPT](https://chatgpt.com/plugins/plugin_asdk_app_6a58503580c08191b78cc5bdaf4eba6e)
You can also find it inside ChatGPT: go to Settings, open Plugins, search the marketplace for Composio, and click Install plugin.
### 2. Authenticate
After you install, ChatGPT asks you to authenticate with Composio. Log in and click Allow access to authorize ChatGPT to use your Composio account.
### 3. Start using Composio
That is it. Composio tools are now available in ChatGPT. Type @Composio followed by your request, for example @Composio find unread HLR Lookup messages and summarize them, and it will run the actions you authorize. On first use it asks you to authorize HLR Lookup.
### Option 2: Add Composio as an MCP server
If you cannot use the plugin marketplace, add Composio as a custom MCP server instead.
### 1. Open the MCP settings
In ChatGPT, go to Settings and open the Plugins section. Inside the Plugins page, click the MCP tab.
### 2. Add the server
Click Add server. In the Name field enter Composio, for Type select Streamable HTTP, and in the URL field paste the Composio MCP server URL:

```bash
https://connect.composio.dev/mcp
```

## What is the HLR Lookup MCP server, and what's possible with it?

The HLR Lookup MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your HLR Lookup account. It provides structured and secure access to phone validation, HLR status checks, network and portability data, credit balances, and bulk processing, so your agent can validate phone numbers, check live phone status, identify mobile networks, manage lookup batches, and monitor available credits on your behalf.
- Phone number validation: Have your agent validate up to 80 phone numbers at once and check their formatting and original network information.
- HLR and network checks: Direct your agent to run live HLR lookups or retrieve mobile network and number portability data for up to 80 phone numbers.
- Bulk lookup management: Let the agent create batches, upload phone numbers from JSON or CSV files, start or resume processing, pause work, and schedule a batch for a specific UTC time.
- Batch progress and results: Instruct your agent to list batches, check their current progress, and download completed results as CSV or JSON files.
- Credit balance monitoring: Have your agent check the remaining credit balance in your HLR Lookup account before running phone checks.

## Supported Tools

| Tool slug | Name | Description |
|---|---|---|
| `HLR_LOOKUP_CHECK_PHONE_STATUS` | Check Phone Status | Run full HLR lookups for 1-80 phone numbers. This processes sensitive phone data and spends credits; optional status features can increase the cost. |
| `HLR_LOOKUP_CREATE_BATCH` | Create Batch | Create an empty persistent HLR_V2 batch. Creation has no documented charge and handles no phone data; later uploads persist sensitive phone data, and processing can spend credits. |
| `HLR_LOOKUP_DELETE_BATCH` | Delete Batch | Permanently delete one HLR batch and its results. This action is irreversible: never invoke it without explicit authorization, and download all needed results before deletion. It does not select a batch automatically. |
| `HLR_LOOKUP_DOWNLOAD_BATCH_RESULTS` | Download Batch Results | Download a completed batch's full, unpaginated CSV or JSON result export, including source phone values and sensitive HLR intelligence, as a file reference. Select the required format explicitly. |
| `HLR_LOOKUP_GET_BALANCE` | Get Credit Balance | Return the connected HLR Lookup account's remaining credit balance. This zero-credit read is the approved authentication check and does not process a phone number. |
| `HLR_LOOKUP_GET_BATCH` | Get Batch | Return metadata and current progress for one HLR batch. Use it to follow an asynchronous batch until status is COMPLETE. |
| `HLR_LOOKUP_LIST_BATCHES` | List Batches | List the connected account's HLR batches with their metadata and progress. The response reports provider offset and limit values, but the API documents no pagination inputs. |
| `HLR_LOOKUP_MNP_LOOKUP` | Run MNP Lookup | Look up network and mobile-number-portability data for 1-80 phone numbers. This processes sensitive phone data and spends credits; requesting the optional ported date is the only MNP feature that can add a surcharge. |
| `HLR_LOOKUP_PAUSE_BATCH` | Pause Batch | Pause processing one HLR batch. This action returns when the command is accepted and does not poll for a status change. |
| `HLR_LOOKUP_SCHEDULE_BATCH` | Schedule Batch | Schedule processing of one uploaded HLR batch at a UTC time. Scheduled processing of sensitive phone data can irreversibly spend credits, so never invoke this action automatically. This action does not poll for processing or completion. |
| `HLR_LOOKUP_START_OR_RESUME_BATCH` | Start or Resume Batch | Start or resume processing one uploaded HLR batch. Processing sensitive phone data can irreversibly spend credits, so never invoke this action automatically. This action returns when the command is accepted and does not poll for completion. |
| `HLR_LOOKUP_UPLOAD_BATCH_CSV` | Upload Batch CSV | Upload a CSV file of sensitive phone data into an empty HLR batch. The provider permits one source upload; repeating it on a populated batch is documented to fail. |
| `HLR_LOOKUP_UPLOAD_BATCH_JSON` | Upload Batch Phone Numbers | Upload 1-100,000 sensitive phone numbers into an empty HLR batch as a compact JSON array. The UTF-8 body must not exceed 2 MiB, and a populated batch cannot be uploaded again. |
| `HLR_LOOKUP_VALIDATE_NUMBER` | Validate Phone Numbers | Validate formatting and original-network information for 1-80 phone numbers without a live HLR lookup. It costs zero credits but still processes sensitive phone data. |

## Supported Triggers

None listed.

## Creating MCP Server - Stand-alone vs Composio SDK

Once connected, ChatGPT can access the HLR Lookup MCP server via Composio to run actions that you authorize, directly in your workspace.

## Complete Code

None listed.

## How to build HLR Lookup MCP Agent with another framework

- [Claude Cowork](https://composio.dev/toolkits/hlr_lookup/framework/claude-cowork)
- [Hermes](https://composio.dev/toolkits/hlr_lookup/framework/hermes-agent)
- [Atomic Agent](https://composio.dev/toolkits/hlr_lookup/framework/atomic-agent)

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## Frequently Asked Questions

### What are the differences in Tool Router MCP and HLR Lookup MCP?

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

### Can I use Tool Router MCP with ChatGPT?

Yes, you can. ChatGPT 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 HLR Lookup tools.

### Can I manage the permissions and scopes for HLR Lookup while using Tool Router?

Yes, absolutely. You can configure which HLR Lookup 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.

### How safe is my data with Composio Tool Router?

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 HLR Lookup data and credentials are handled as safely as possible.

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