# How to connect GLEIF API MCP with ChatGPT Work

```json
{
  "title": "How to connect GLEIF API MCP with ChatGPT Work",
  "toolkit": "GLEIF API",
  "toolkit_slug": "gleif",
  "framework": "ChatGPT Work",
  "framework_slug": "chatgpt",
  "url": "https://composio.dev/toolkits/gleif/framework/chatgpt",
  "markdown_url": "https://composio.dev/toolkits/gleif/framework/chatgpt.md",
  "updated_at": "2026-09-16T05:33:49.082Z"
}
```

## Introduction

### How to connect GLEIF API MCP with ChatGPT Work
[ChatGPT Work](https://openai.com/chatgpt-work/) is an agent inside ChatGPT built for your most ambitious work. It takes action across your apps and files, stays with a project for hours, and turns 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 GLEIF API account to ChatGPT Work via Composio Connect, so it can search LEIs, retrieve entity details, trace ownership relations, and map external identifiers through natural language commands without ever putting your account credentials at risk.

## Also integrate GLEIF API with

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

## TL;DR

### Why use Composio over default connectors?
- Apps with read and write access. Default connectors mostly can read your data. Composio's GLEIF API integration lets ChatGPT Work 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 GLEIF API to ChatGPT Work

### Prerequisites
- A ChatGPT account with access to ChatGPT Work (rolling out across Pro, Enterprise, Edu, Plus, and Business plans). We will use the [ChatGPT desktop app](https://openai.com/chatgpt/download/), which is available on every plan.
- Access to the GLEIF API workspace you want to connect.
- [Composio MCP](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 GLEIF API to ChatGPT Work
### 1. Open the MCP settings
In ChatGPT Work, 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 GLEIF API MCP server, and what's possible with it?

The GLEIF API MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your GLEIF API account. It provides structured and secure access so your agent can perform GLEIF API operations on your behalf.

## Supported Tools

| Tool slug | Name | Description |
|---|---|---|
| `GLEIF_EXPORT_LEI_RECORDS` | Export LEI Records | Download up to 5,000 LEI records using the complete closed field-filter and sort surface as CSV, XLSX, JSON, or XML. |
| `GLEIF_GET_AUTOCOMPLETIONS` | Get Autocompletions | Return prefix-based GLEIF search suggestions from the provider's data collection, defaulting absent top-level metadata and links to empty objects. Highlighting is untrusted provider HTML and must be sanitized before rendering. |
| `GLEIF_GET_FUND_OR_BRANCH_RELATIONSHIP` | Get Fund or Branch Relationship | Get the complete relationship record linking an LEI to its fund manager, umbrella fund, master fund, or head office. |
| `GLEIF_GET_FUZZY_COMPLETIONS` | Get Fuzzy Completions | Find approximate GLEIF search matches for misspelled or incomplete input. Results are complete provider resources from the data-only collection when no top-level metadata or links are supplied; they are fragments, not full LEI records or proof of identity. |
| `GLEIF_GET_LEI_ISSUER_FOR_RECORD` | Get LEI Issuer for Record | Get the complete LEI-issuer reference resource associated with a specified LEI record. |
| `GLEIF_GET_LEI_RECORD` | Get LEI Record | Retrieve one LEI record with complete provider attributes, relationships, links, and Golden Copy metadata when its LEI is known. |
| `GLEIF_GET_PARENT_INFORMATION` | Get Parent Information | Get a direct or ultimate parent LEI plus complete relationship evidence, or the complete reporting exception when no parent is reported. |
| `GLEIF_GET_REFERENCE_ITEM` | Get Reference Item | Get one complete item from a selected GLEIF reference collection by its collection-specific identifier. |
| `GLEIF_GET_RELATED_LEI_RECORD` | Get Related LEI Record | Follow a selected associated-entity, managing-LOU, fund, or head-office link and return the complete related LEI record. |
| `GLEIF_LIST_CHILD_ENTITIES` | List Child Entities | List one page of complete direct or ultimate accounting-child LEI records. |
| `GLEIF_LIST_CHILD_RELATIONSHIPS` | List Child Relationships | List one page of complete direct or ultimate accounting-child relationship records for an LEI. |
| `GLEIF_LIST_FUND_OR_BRANCH_ENTITIES` | List Fund or Branch Entities | List one page of complete managed-fund, sub-fund, feeder-fund, or international-branch LEI records. |
| `GLEIF_LIST_FUND_OR_BRANCH_RELATIONSHIPS` | List Fund or Branch Relationships | List one page of complete fund-management, sub-fund, feeder-fund, or international-branch relationship records. |
| `GLEIF_LIST_LEI_FIELD_MODIFICATIONS` | List LEI Field Modifications | List one page of complete LEI, relationship, or reporting-exception field-history resources with optional type, XPath, and date filters. |
| `GLEIF_LIST_LEI_ISINS` | List LEI ISINs | Return one page of complete GLEIF-ANNA ISIN mappings for an issuer LEI. |
| `GLEIF_LIST_LEI_ISSUER_JURISDICTIONS` | List LEI Issuer Jurisdictions | List one page of complete jurisdiction resources for which an LEI issuer is accredited. |
| `GLEIF_LIST_REFERENCE_DATA` | List Reference Data | List one complete JSON:API page from a selected GLEIF field, code, or issuer reference collection. Use GLEIF_LIST_REGISTRATION_AGENTS for the unpaginated registration-agent collection. |
| `GLEIF_LIST_REGISTRATION_AGENTS` | List Registration Agents | List all GLEIF registration agents, optionally filtered by issuer LEI or registration-agent LEI. This provider operation returns the complete collection and does not support pagination. |
| `GLEIF_LIST_SUCCESSOR_ENTITIES` | List Successor Entities | List one page of all successor LEI records for an entity. Prefer this action over the deprecated GLEIF_GET_SUCCESSOR_ENTITY lookup. |
| `GLEIF_SEARCH_LEI_RECORDS` | Search LEI Records | Search LEI records with closed, field-aware filters and sorting, returning one complete JSON:API page. |

## Supported Triggers

None listed.

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

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

## Complete Code

None listed.

## How to build GLEIF API MCP Agent with another framework

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

## Related Toolkits

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- [Alpaca](https://composio.dev/toolkits/alpaca) - Alpaca is a stock and crypto trading platform for commission-free trading, real-time market data, and algorithmic strategies. Use it to build brokerage apps, trading bots, and portfolio workflows with market connectivity.
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- [Clientary](https://composio.dev/toolkits/clientary) - Clientary is a platform for managing clients, invoices, projects, proposals, and more. It streamlines client work and saves you serious admin time.
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- [Coupa](https://composio.dev/toolkits/coupa) - Coupa is a business spend management platform for procurement, invoicing, and expenses. It helps organizations streamline purchasing, control costs, and gain complete visibility over financial operations.
- [CurrencyScoop](https://composio.dev/toolkits/currencyscoop) - CurrencyScoop is a developer-friendly API for real-time and historical currency exchange rates. Easily access fiat and crypto data for smart, up-to-date financial applications.
- [Daffy](https://composio.dev/toolkits/daffy) - Daffy is a modern charitable giving platform with a donor-advised fund. Easily set aside funds, grow them tax-free, and donate to over 1.7 million U.S. charities.

## Frequently Asked Questions

### What are the differences in Tool Router MCP and GLEIF API MCP?

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

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

Yes, you can. ChatGPT Work 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 GLEIF API tools.

### Can I manage the permissions and scopes for GLEIF API while using Tool Router?

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

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