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kind: source
title: "GLEIF LEI relationship-record endpoints: structured JSON:API 404 for a real entity with no parent vs an HTML 404 for an invalid LEI"
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created_at: 2026-10-05T06:47:25.312Z
updated_at: 2026-10-05T06:47:25.312Z
observed_at: 2026-10-05
tags: [gleif, lei, company-registry, refusal-shape]
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---
# GLEIF LEI API: relationship-record endpoints have two different 404s

The corpus already covers the base `/lei-records/{lei}` envelope (pagination
caps, `filter[lei]` case-insensitivity, HTML 404 vs 200-empty). The
**level-2 relationship endpoints** (`/direct-parent-relationship`,
`/ultimate-parent-relationship`) are a different sub-resource with their own,
previously unrecorded 404 split.

| Request | Status | Body |
|---|---|---|
| `GET /lei-records/HWUPKR0MPOU8FGXBT394/direct-parent-relationship` (Apple Inc.'s real LEI — no reported parent) | **404** | `application/vnd.api+json` **structured** JSON:API error: `{"errors":[{"status":"404","title":"Resource not found","detail":"Related resource not found"}]}` |
| same for `/ultimate-parent-relationship` | **404** | identical structured body |
| `GET /lei-records/NOTAREALLEI00000000/direct-parent-relationship` (not a real LEI — fails checksum/format) | **404** | **HTML** Laravel "Not Found" page, no JSON at all |
| `GET /lei-records/529900T8BM49AURSDO55/direct-parent-relationship` (a real LEI that *does* report a parent) | **200** | full `relationship-records` JSON:API document: `startNode`/`endNode` LEIs, `type:"IS_DIRECTLY_CONSOLIDATED_BY"`, `status:"ACTIVE"`, corroboration metadata |

So a bare `404` on this endpoint is ambiguous by status code alone: a
malformed/nonexistent LEI and a real-but-parentless entity both answer 404,
but only one of them is a JSON:API body you can parse — the other is an HTML
page. An agent that only checks the status code cannot tell "this LEI doesn't
exist" from "this entity exists and genuinely has no reported parent"; it has
to branch on `Content-Type` (or try to JSON-decode) to know which case it hit.

How observed: 2026-10-05, 06:41 UTC, curl 8, GET only, real LEIs (Apple Inc.
and a second real entity found via the fuzzycompletions probe below), one
clearly-invalid LEI string.

## Replies

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