# How to connect GLEIF API to Claude ```json { "title": "How to connect GLEIF API to Claude", "toolkit": "GLEIF API", "toolkit_slug": "gleif", "framework": "Claude Cowork", "framework_slug": "claude-cowork", "url": "https://composio.dev/toolkits/gleif/framework/claude-cowork", "markdown_url": "https://composio.dev/toolkits/gleif/framework/claude-cowork.md", "updated_at": "2026-09-16T05:33:49.082Z" } ``` ## Introduction Claude is Anthropic's AI assistant, available on the web, in the desktop app, and on mobile. Cowork is its agent for knowledge work, and it runs on all of those surfaces too. Connected to your apps, Claude can work with your files and services to accomplish complex tasks on your behalf. This guide walks you through the easiest and most secure way to connect your GLEIF API account to Claude via Composio Connect, enabling it to lookup LEI details for 5493001KJTIIGC8Y1R12, list ultimate parents for LEI 213800K2R6R5MVYQ4D30, map external identifiers to LEI for company, and more such actions on your behalf without compromising your account security. Setup is the same on Claude Web, Desktop, and Cowork, and you only need to do it once. The connector is tied to your account, so it's available in all three. ## Also integrate GLEIF API with - [ChatGPT Work](https://composio.dev/toolkits/gleif/framework/chatgpt) - [Hermes](https://composio.dev/toolkits/gleif/framework/hermes-agent) ## Connect GLEIF API to Claude Cowork ### Connecting GLEIF API to Claude Web, Desktop, and Cowork 1. Open Customize In Claude Desktop, click Customize in the left sidebar, then select Connectors and click the + icon at the top. 2. Add the Composio MCP server Click Add custom connector and paste in 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. ## Troubleshooting ### 1. Why does Claude not use the Composio connector for GLEIF API? The connector can show as connected, but Claude must use it in each GLEIF API conversation. - Click + at the lower left of the chat, or type /. - Hover Connectors. - Turn on Composio. - Ask Claude to connect to GLEIF API again. ### 2. Why does Claude show an MCP server error before GLEIF API connects? Claude can show Couldn't reach the MCP server or Authorization with the MCP server failed when you add the connector for GLEIF API. - Check that the connector URL is https://connect.composio.dev/mcp. - Connectors run from Anthropic's cloud, so your device network is usually not the problem. - Add the connector again from Customize > Connectors, then ask Claude to connect GLEIF API. - If it fails again, send the error and the ofid_ reference id to support@composio.dev. ### 3. Why does the GLEIF API authorization link not work? The Composio connector is one server. Your GLEIF API account connects separately when Claude asks for it. - If the browser does not open, or the link expires, ask Claude to retry the GLEIF API connection. - Composio creates a fresh GLEIF API authorization link. - Open that link in your browser and finish the GLEIF API sign-in. ### 4. Why do GLEIF API actions fail after they worked before? The GLEIF API connection can expire or lose permission. - Ask Claude to inspect the GLEIF API connection. - If the connection is unhealthy, disconnect it when Claude prompts you. - Reconnect the GLEIF API account and retry the action. - If Claude shows a permission prompt, approve it before Claude changes data in GLEIF API. - If the action still fails with a permission error, check that the connected account has that permission in GLEIF API itself. ### 5. How do I switch to a different GLEIF API account? Claude can manage the GLEIF API connection for you. - Ask Claude to disconnect or delete the current GLEIF API account. - Ask Claude to connect GLEIF API again. - Open the new Composio authorization link for GLEIF API. - Sign in with the other GLEIF API account in the browser. - After the account connects, ask Claude to retry the GLEIF API task. ### 6. Why is my GLEIF API connection missing in Claude Desktop or on a Team plan? The connector belongs to your Claude account, so your GLEIF API connection works in Claude Web, Desktop, and Cowork. - In Claude Desktop, open Customize > Connectors. - Next to Composio, click ⋮ and click Clear cache. - If GLEIF API tools still do not appear, click ⋮, disconnect, remove the connector, and add it again. - On Team or Enterprise, an Owner or Primary Owner must enable the connector before you can connect GLEIF API. ## Creating MCP Server - Stand-alone vs Composio SDK The GLEIF API MCP server connects Claude Web, Desktop, and Cowork to your GLEIF API account through Composio. Once connected, Claude can use the available GLEIF API tools and triggers to complete tasks on your behalf. ## Complete Code None listed. ## How to build GLEIF API MCP Agent with another framework - [ChatGPT Work](https://composio.dev/toolkits/gleif/framework/chatgpt) - [Hermes](https://composio.dev/toolkits/gleif/framework/hermes-agent) ## Related Toolkits - [Stripe](https://composio.dev/toolkits/stripe) - Stripe is a global online payments platform offering APIs for managing payments, customers, and subscriptions. Trusted by businesses for secure, efficient, and scalable payment processing worldwide. - [44API](https://composio.dev/toolkits/44api) - 44API is an API service for validating VAT and tax identifiers and returning company details. Use it to verify business tax data and manage account IP whitelists quickly. - [Airwallex](https://composio.dev/toolkits/airwallex) - Airwallex is a global financial platform providing business accounts, payments, payouts, FX, and cards. 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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 Claude Cowork? Yes, you can. Claude Cowork 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. --- [See all toolkits](https://composio.dev/toolkits) · [Composio docs](https://docs.composio.dev/llms.txt)