How to integrate GLEIF API MCP with Atomic Agent

Connect Atomic Agent 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

Atomic Agent is an open-source AI agent that runs on your machine and supports local models through llama.cpp. Connect it to 1,500+ apps through Composio, including GLEIF API.

This guide uses Atomic Agent's built-in Composio integration. You need Atomic Agent v0.5.6 or later, your own Composio API key, and a GLEIF API account. See the Atomic Agent documentation for installation instructions.

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How Atomic Agent connects to GLEIF API

Atomic Agent connects to Composio's Tool Router over Streamable HTTP MCP. It discovers the tools needed for your request, and Composio handles account authentication.

Execution and account-connection tools follow Atomic Agent's configured approval policy. Review any approval prompt before allowing an action on your connected account.

Connect GLEIF API to Atomic Agent

  1. Sign up or sign in to the Composio dashboard. Copy your API key.
  2. In Atomic Agent, open the Integrations tab and select Composio. Select API key, press e, paste the key, and press Enter. The tools become available immediately, without a restart.
  3. Ask Atomic Agent to do something in GLEIF API. It searches Composio for the right tool.
  4. On first use, open the sign-in link returned in the chat. Connect your GLEIF API account, then return to Atomic Agent to continue.

Headless setup

Add the following line to ~/.atomic-agent/.env, replacing YOUR_COMPOSIO_API_KEY with your key. Start Atomic Agent after saving the file.

bash
COMPOSIO_API_KEY=YOUR_COMPOSIO_API_KEY

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.

Use GLEIF API from Atomic Agent

With your account connected, ask Atomic Agent to work with GLEIF API in natural language. You can connect more apps through the same Composio integration as you need them.

Visit the Atomic Agent website or inspect the Atomic Agent source code.

Troubleshooting

Why is my API key rejected?

Copy the key directly from the Composio dashboard. Atomic Agent requires ASCII characters because it sends the key in an HTTP header. Remove any extra characters introduced when copying.

Why are Composio tools unavailable after saving a key?

Check that you use Atomic Agent v0.5.6 or later and that Composio is enabled in your configuration. A "composio": { "enabled": false } setting disables the integration while keeping the saved key on disk.

Does Composio have a free plan?

The Hobby plan includes 100,000 tool calls per month. Composio-managed OAuth apps have a lower included allowance. See Composio pricing for the current limits that apply to your connection.

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.

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. Atomic Agent 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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