Developers > LEI API


The only GLEIF accredited LEI Issuer with the LEI API to build Legal Entity Identifier registration & renewal directly into KYC/KYB applications and workflows.

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RapidLEI’s LEI API gives developers the flexibility to build automated LEI registration into applications quickly and easily.

The LEI API makes searching for LEIs & organizations, and then registering and issuing Legal Entity Identifiers easy and fast. Use the executable API descriptions (Postman Collection), documentation, sample code, and developer tools you need to easily build same-session LEI issuance into Know Your Customer (KYC) / Know Your Business (KYB) applications and workflows. The RapidLEI automation logic will handle the complexity of the application validation.

Create LEI API account

Register an Account

You’ll need a RapidLEI API account, if you don’t have one already contact us to request access.

Access to the API is free.

LEI Lookup API

LEI Lookup API

Published by the GLEIF:

  • Find Legal Entities by name
  • Search by LEI
  • Find LEIs by BIC Code
  • Display parents of an LEI
  • Display children of an LEI

LEI Lifecycle Management API

LEI Registration API for Registration Agents & Validation Agents

Published by RapidLEI:

  • Create New LEI
  • Import Existing LEI
  • Check LEI Order Status
  • Query all LEIs
  • Confirm LE-RD Data Quality
  • Authentication – Request Access Token
  • Accounts – Create User

Why use the LEI API?



Automate LEI registrations

Avoid manual ordering, faster than bulk uploading. Build into KYC/KYB applications and workflows for on-demand registration and same session issuance. GLEIF Validation Agent ready.


Easy to implement

Modern REST API with plenty of guides, reference documents and code snippets to make implementing fast and simple.


Better customer experience

Streamlined LEI registration means a better user experience for your customers and partners


New revenue streams

LEIs represent a significant standalone revenue opportunity, and API integration offers more strategic opportunities to meet  new use cases

API for LEI Solutions

Banking, FinTech, & GLEIF Validation Agents

Build on-demand LEI requests and same session LEI issuance into KYC/KYB onboarding, organization identity verification and trades workflows. Fully supports the GLEIF Validation Agent (VA) framework.

GLEIF Registration Agents

Reduce back office workload as you streamline how you deliver LEIs to your customers under management.

Asset Managers

Build on-demand LEI requests and same session issuance trades workflows – avoid “no LEI no trade” scenarios.

Entity Management Software

Add further value to clients by offering LEI registration directly from your entity management solution. Identify LEI errors, gaps and lapses in LEI compliance and fix the issue in the same session.

Certificate Authorities (CA)

Build on-demand issuance for LEI inclusion in Digital Certificates, validation workflows, and reselling standalone LEIs. Reduce organization validation costs/time, reduce risks of mis-issuance, allow for automated issuance of organization validated Certificates. Capitalise on LEI post issuance quality checks and live data lookups.

Digital Signature & ESEF Requirements

Embed trusted organization identity in digital signatures and digitally signed XBRL & PDF documents. Meet new European Securities and Markets Authority (ESMA) regulation for European Single Electronic Format (ESEF) Annual Reports.

LEI API Languages

Building your application

You’ve got an idea in mind of how LEIs can add value to your product, your workflow or your bottom line. Let’s get it to production. Our LEI API guides and reference docs will get you across the deploy line using the language of your choice.