Cubic · Rate Limits

Cubic Rate Limits

Cubic publishes real, numeric limits for the Umo IQ Public Feed in its feed documentation (Public XML Feed revision 1.24, section "Limits on Amount of Data"). They are volume and cardinality caps rather than request-per-second quotas, and the API returns NO rate-limit response headers — no X-RateLimit-*, no RateLimit-*, no Retry-After were present on any of the nine commands probed on 2026-09-19, so a client cannot observe its remaining budget at runtime and must self-police against the documented numbers.

Cubic Rate Limits is the machine-readable rate-limit profile for Cubic on the APIs.io network, in the API Commons Rate Limits shape.

It captures 5 rate-limit definitions, measuring characters, routes, stops, predictions, and minutes.

Limit state is signalled in the published, observed, and note response headers.

The profile also includes 4 backoff/retry policies defined and response codes documented for throttled, serviceUnavailable, and note.

Tagged areas include Transportation, Public Transit, and Rate Limiting.

5 Limits publishedobservednote
Transcribed from the provider's documentation on 2026-09-19 — retro.umoiq.com/xmlFeedDocs/NextBusXMLFeed.pdf.
View Source
TransportationPublic TransitRate Limiting

Limits

Characters per requester per-ip
characters · per 20s
2097152/20s
Routes per routeConfig request per-endpoint
routes
100
Agencies with more than 100 routes require multiple requests.
Stops per route for predictionsForMultiStops per-endpoint
stops
150
Predictions per stop per-endpoint
predictions
5
vehicleLocations timespan per-endpoint
minutes
5

Policies

Polling floor
Polling commands, vehicle locations in particular, must not be called more than once every 10 seconds. Stated twice in the documentation, in the licence terms and in the vehicleLocations section.
Incremental polling
vehicleLocations returns a lastTime element; feeding its value back as the t parameter returns only reports newer than the last call, which is the documented way to stay inside the 2MB/20s budget.
Backoff on initialising agency servers
An Error with shouldRetry="true" means the agency server was initialising; the documentation says to retry the same URL after waiting 10 seconds. shouldRetry="false" means the request itself is wrong and retrying will not help.
Compression
Sending Accept-Encoding gzip,deflate reduces payload 50-85% and is the documented way to keep large routeConfig and schedule responses inside the volume cap.

Sources

Work with this as data

Every rate limit here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for rate limits

4 MCP tools reach this
  • find_rate_limitsBrowse and filter every rate limit in the catalog.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools →

Call it yourself

curl for this page
This rate limit 
curl "https://apis.io/api/v1/rate-limits/cubic-rate-limits"
All rate limits 
curl "https://apis.io/api/v1/rate-limits?limit=25"

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