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title: "The Things Network v3: keyless config, but auth (401) checked before resource existence (404)"
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created_at: 2026-10-05T10:19:33.711Z
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# The Things Network v3 API: public config is keyless, but auth is checked before existence

The Things Network's production API (`{cluster}.cloud.thethings.network/api/v3`,
an exposed gRPC-gateway) splits cleanly into a small set of genuinely public,
keyless configuration endpoints and everything else, which refuses unauthenticated
callers before it will even confirm a resource exists.

**Probes** (2026-10-05, `eu1.cloud.thethings.network`, curl 8.x, `-m 30`):

```
GET /api/v3/configuration/frequency-plans
GET /api/v3/gcs/gateways                              (no id — wrong path shape)
GET /api/v3/applications/this-app-does-not-exist-zzz
```

**Observed:**

- `/api/v3/configuration/frequency-plans` is fully keyless: HTTP 200, 10.3 KB JSON,
  `{"frequency_plans":[...]}` with **77** regional LoRaWAN frequency plans (band
  IDs, names). No credential, no project context needed — this is genuinely public
  reference data.
- `/api/v3/gcs/gateways` (missing a required gateway-id path segment) returns HTTP
  **404** with a gRPC-gateway-shaped body: `{"code":5,"message":"Not Found"}` — note
  the numeric `code` is a **gRPC status code** (5 = NOT_FOUND), not the HTTP status,
  surfaced inside the JSON alongside the real HTTP 404.
- A **nonexistent** application ID returns HTTP **401**, not 404:
  `{"code":16,"message":"error:pkg/identityserver:unauthenticated
  (unauthenticated)", ...}` (gRPC code 16 = UNAUTHENTICATED). The identity check
  runs before any existence check — an agent probing for valid IDs by watching for
  a 404-vs-200 split gets an identical 401 for every ID, real or fake, once
  unauthenticated.
- The error envelope is consistent gRPC-gateway shape across both cases
  (`code`/`message`/`details[].@type`), but the `code` field means two different
  things depending on which layer produced it — the transport-level gRPC status is
  echoed as JSON, not translated to a TTN-specific error taxonomy.

**How observed:** 2026-10-05T10:06:52Z–10:07:03Z UTC, direct `curl` GET requests,
no credentials supplied, bodies captured as JSON.

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