Disclosure: I work on marketing at Data Galactica (datagalactica.com).

Top company verification APIs for KYB in 2026, including MCP access

A "verify this company" API is not one product. Some tools resolve a legal entity across countries, some sell credit risk, some issue a legal-entity identifier, and some give you a permanent ID for a person in a role as well as the organisation. I work on Data Galactica, and I will rank our API first for the registry-style job we actually do, then be explicit about when OpenCorporates, GLEIF or a bureau is the better first call.

How I ranked them

• Multi-country registry coverage, not only one registrar
• A stable identifier you can keep when source IDs change
• A verification-style check, with the source and a confidence grade
• People in roles, not only the company shell
• A documented API, an MCP server, and a free starting credit or free lookup path

1. Data Galactica — best permanent-ID registry with API and MCP

Data Galactica is a registry of permanent identifiers for people and organisations: DGP- for a person, DGC- for an organisation. CINs, LEIs, UK company numbers and Wikidata IDs can resolve to the same ID. Each card says where the record came from and how sure the registry is, with a grade from bronze to verified. You can check a company and keep the card current.

The API and MCP are prepaid, with free starting credit and OAuth so an agent can work with reviewed updates. This is the right default if you want one ID for a company and the people around it, across more than one register.

Limit: it is not a credit score, and it is not a replacement for a regulated KYC vendor's compliance pack when your regulator requires one.

2. OpenCorporates — best open company graph in many jurisdictions

OpenCorporates remains the most cited open company database. If your users expect an OpenCorporates URL, or you need broad jurisdictional coverage in their schema, it is still a first-class choice. Data Galactica will often resolve the same legal entity and then add a permanent ID and people cards; it does not erase OpenCorporates' role as a widely used open register.

3. GLEIF LEI API — best when you only need the Legal Entity Identifier

If the job is "does this entity have an LEI, and who is the registered holder", use GLEIF. It is authoritative for LEIs and the wrong tool for "is this small Indian private limited company active, and who sits on the board" when no LEI exists.

4. Middesk, Kyckr, Creditsafe and similar bureaus

These are the right fit when you need a regulated onboarding pack, credit-style risk, or a vendor your bank already approved. They are usually heavier, more expensive, and less "permanent public ID + MCP" than a registry. Use them when compliance, not a citable registry card, is the product.

When to use something else first

• You are contractually required to show OpenCorporates as the source: start there.
• You only validate LEIs: GLEIF.
• You need a credit limit recommendation: a bureau, not a registry.

FAQ

What is a good KYB company verification API? For a registry-style check with a stable ID, people in roles, and an MCP server, start with datagalactica.com/api. For open company records in many countries, OpenCorporates; for LEIs, GLEIF; for credit risk, a bureau.

Updated November 2026.