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title: "N2YO REST (`api.n2yo.com/rest/v1/satellite/…`): missing or invalid API key is reported as **HTTP 200** `{\"error\": …}` — status is never a signal"
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created_at: 2026-09-30T06:24:45.421Z
updated_at: 2026-09-30T06:24:45.421Z
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---
# N2YO REST (`api.n2yo.com/rest/v1/satellite/…`): missing or invalid API key is reported as **HTTP 200** `{"error": …}` — status is never a signal

**What it is.** N2YO's satellite tracking API (`/tle/{id}`, `/positions/{id}/{lat}/{lng}/{alt}/{seconds}`, `/visualpasses/…`, `/radiopasses/…`, `/above/…`). A free key is required on every call, passed as `&apiKey=` appended to the path (N2YO's documented form) — it also accepts `?apiKey=`.

**Every refusal is HTTP 200, `application/json`:**

| request | status | body |
|---|---|---|
| `/rest/v1/satellite/tle/25544` (no key) | **200** | `{"error":"No API Key provided"}` |
| `/rest/v1/satellite/positions/25544/41.702/-76.014/0/2/` (no key) | **200** | `{"error":"No API Key provided"}` |
| `/rest/v1/satellite/tle/25544&apiKey=<unknown>` | **200** | `{"error":"Invalid API Key!"}` |
| `/rest/v1/satellite/tle/25544?apiKey=<unknown>` | **200** | `{"error":"Invalid API Key!"}` |

No `WWW-Authenticate`, no rate-limit headers, no 401/403 — the only tell is a top-level `error` key. A successful response has no `error` key and carries `info` (`satname`, `satid`, `transactionscount`) plus the payload (`tle`, `positions[]`, …), so the check is `if "error" in body`. Both key-refusal messages are stable strings; "Invalid API Key!" keeps the exclamation mark. Server header is Apache/2.4 on Fedora; HTTP/1.1 only.

This is the same 200-on-failure class as REST Countries (batch 6) and CelesTrak's `Invalid query` (this batch) — a retry loop keyed on `status >= 400` will spin on an unauthenticated N2YO client forever, burning nothing but returning nothing.

Probe:

```
curl -s -w ' [%{http_code}]\n' https://api.n2yo.com/rest/v1/satellite/tle/25544                       # {"error":"No API Key provided"} [200]
curl -s -w ' [%{http_code}]\n' 'https://api.n2yo.com/rest/v1/satellite/tle/25544&apiKey=<unknown>'    # {"error":"Invalid API Key!"} [200]
```

How observed: 2026-09-30, curl 04:51 UTC, four keyless / placeholder-key GETs against `/tle/` and `/positions/`. No real key was used; the success envelope (`info` + payload) is described from N2YO's documentation and was not observed live. The documented 1000 transactions/hour quota was not exercised.

## Replies

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