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How to integrate GLEIF API MCP with Hermes

Connect Hermes to GLEIF API MCP. Lookup lei details for 5493001kjtiigc8y1r12, list ultimate parents for lei 213800k2r6r5mvyq4d30, and more using natural language, with authentication handled for you.

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GLEIF provides free public access to Legal Entity Identifier records and related reference data. Access standardized LEI data, ownership relationships, and identifier mappings.

20 Tools

Introduction

Hermes is a 24/7 autonomous agent that lives on your computer or server — it remembers what it learns and evolves as your usage grows.

This guide explains the easiest and most robust way to connect your GLEIF API account to Hermes. You can do this through either Composio Connect CLI or Composio Connect MCP. For personal use we recommend the CLI, but you won't go wrong with MCP either.

Also integrate GLEIF API with

ChatGPT WorkClaude Cowork

What is Composio Connect?

Composio Connect is a consumer offering that lets anyone plug 1,500+ applications directly into their agent harness — including Hermes. It can:

  • Search and load tools from relevant toolkits on-demand, reducing context usage.
  • Chain multiple tools to accomplish complex workflows via a remote workbench, without excessive back-and-forth with the LLM.
  • Manage app authentication end-to-end with zero manual overhead.

Integrating GLEIF API with Hermes

Using Composio Connect CLI

1. Install the Composio CLI

Run the install script directly, or paste https://composio.dev/hermes into your Hermes chat box to have it installed for you.

bash
curl -fsSL https://composio.dev/install | bash
Hermes authenticating with Composio

2. Authenticate

Once the CLI is installed, ask Hermes to authenticate with Composio.

3. Connect to GLEIF API

Ask your agent to connect to GLEIF API, or simply request any GLEIF API-related task. Hermes will prompt you to authenticate and authorize access.

4. Done. You're all set with a new GLEIF API connection.

Using Composio Connect MCP

1. Get your MCP URL and API Key

Go to dashboard.composio.dev and copy your Connect MCP URL and API key.

Copy MCP URL and API key from Composio dashboard

2. Open the Hermes config file

bash
nano ~/.hermes/config.yaml

3. Add the Composio Connect MCP server

bash
mcp_servers:
  composio:
    url: "https://connect.composio.dev/mcp"
    headers:
      x-consumer-api-key: "YOUR_COMPOSIO_API_KEY"
    connect_timeout: 60
    timeout: 180

Save with Ctrl + O, Enter, then exit with Ctrl + X.

4. Restart your Hermes agent

Once restarted, ask your agent to connect to GLEIF API or request any GLEIF API-related task. It will prompt you to authenticate and authorize access.

5. Done!

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.

Way Forward

With GLEIF API connected, Hermes can now act on your behalf whenever it detects a relevant task or you ask it to.

From here, you can extend Hermes further:

  • Connect more apps: Calendar, Slack, Notion, Linear, and hundreds of others are available through the same Composio Connect setup. Each new integration compounds what Hermes can do for you.
  • Build workflows across tools: Once multiple apps are connected, Hermes can chain actions together — turn an email into a calendar invite, a Slack message into a Linear ticket, or a meeting note into a follow-up draft.
  • Let it learn your patterns: The more you use Hermes, the better it gets at anticipating how you'd handle recurring tasks. Give it feedback on drafts and decisions, and it will adapt.

If you run into trouble or want to share what you've built, join the community or check out the Docs for deeper configuration options.

TOOLS

Supported Tools

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

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.

Get Autocompletions

Return prefix-based GLEIF search suggestions from the provider's data collection, defaulting absent top-level metadata and links to empty objects.

Get Fund or Branch Relationship

Get the complete relationship record linking an LEI to its fund manager, umbrella fund, master fund, or head office.

Get Fuzzy Completions

Find approximate GLEIF search matches for misspelled or incomplete input.

Get LEI Issuer for Record

Get the complete LEI-issuer reference resource associated with a specified LEI record.

Get LEI Record

Retrieve one LEI record with complete provider attributes, relationships, links, and Golden Copy metadata when its LEI is known.

Get Parent Information

Get a direct or ultimate parent LEI plus complete relationship evidence, or the complete reporting exception when no parent is reported.

Get Reference Item

Get one complete item from a selected GLEIF reference collection by its collection-specific identifier.

Get Related LEI Record

Follow a selected associated-entity, managing-LOU, fund, or head-office link and return the complete related LEI record.

List Child Entities

List one page of complete direct or ultimate accounting-child LEI records.

List Child Relationships

List one page of complete direct or ultimate accounting-child relationship records for an LEI.

List Fund or Branch Entities

List one page of complete managed-fund, sub-fund, feeder-fund, or international-branch LEI records.

List Fund or Branch Relationships

List one page of complete fund-management, sub-fund, feeder-fund, or international-branch relationship records.

List LEI Field Modifications

List one page of complete LEI, relationship, or reporting-exception field-history resources with optional type, XPath, and date filters.

List LEI ISINs

Return one page of complete GLEIF-ANNA ISIN mappings for an issuer LEI.

List LEI Issuer Jurisdictions

List one page of complete jurisdiction resources for which an LEI issuer is accredited.

List Reference Data

List one complete JSON:API page from a selected GLEIF field, code, or issuer reference collection.

List Registration Agents

List all GLEIF registration agents, optionally filtered by issuer LEI or registration-agent LEI.

List Successor Entities

List one page of all successor LEI records for an entity.

Search LEI Records

Search LEI records with closed, field-aware filters and sorting, returning one complete JSON:API page.

FRAMEWORKS

How to build GLEIF API MCP Agent with another framework

ChatGPT Work logo

ChatGPT Work

Use GLEIF API MCP with ChatGPT Work

Claude Cowork logo

Claude Cowork

Use GLEIF API MCP with Claude Cowork

FAQ

Frequently asked questions

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.

Yes, you can. Hermes 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.

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.

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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