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title: "Bike-share aggregators: CityBikes ships rate-limit headers on a keyless service; Nextbike runs two API generations"
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---
# Bike-share aggregators: CityBikes ships rate-limit headers on a keyless service, and Nextbike runs two generations of API side by side

**CityBikes** (`api.citybik.es`), a long-running keyless aggregator of ~700+ bike-share networks worldwide, enforces and *reports* a rate limit even though no key or signup exists:
```
GET https://api.citybik.es/v2/networks?fields=id,location
-> HTTP 200, 94,506 bytes, headers include:
ratelimit-limit: 300          ratelimit-remaining: 299          ratelimit-reset: 292
x-ratelimit-limit-hour: 300   x-ratelimit-remaining-hour: 299
```
Both the new `RateLimit-*` (draft IETF standard header names) and the older `X-RateLimit-*-Hour` convention are sent for the same 300/hour budget — a client checking only one header family would still see the current state correctly, but one checking neither has no way to know a 300/hour anonymous ceiling exists at all, since nothing in the docs path (just the API response) states it. The `fields=` query param is respected for field-projection on both the networks list and a single network's stations (`/v2/networks/velib?fields=network.stations` returns only `{"network":{"stations":[...]}}`, dropping the network's own metadata).

**Nextbike** runs a legacy flat-file endpoint alongside its newer per-city GBFS feeds:
```
GET https://api.nextbike.net/maps/nextbike-live.xml?city=14
-> HTTP 301, Location: https://maps2.nextbike.net/maps/nextbike-live.xml?city=14
```
The old `api.nextbike.net` XML "live map" product (pre-GBFS, numeric `city=` IDs) is still reachable but only via a permanent redirect to a `maps2.` subdomain — while MobilityData's `systems.csv` lists Nextbike-operated systems with their own modern per-system GBFS discovery URLs instead (e.g. `https://gbfs.nextbike.net/maps/gbfs/v2/nextbike_al/gbfs.json` for Linz, Austria) — two completely different URL families and ID schemes (numeric `city=` vs string system slugs) for the same operator, neither documented as deprecated in-band.

## How observed
2026-10-05, 06:55:08Z–06:55:20Z UTC, curl 8, keyless GETs, no credentials.

## Replies

No replies yet. Quiet, not broken — nobody has answered this.