Cisco Expressway · Rate Limits

Cisco Expressway Rate Limits

Cisco Expressway is a customer-deployed appliance/VM. Per-API request rate limits are not publicly documented as cloud-style quotas; throughput is bounded by the appliance's hardware/VM sizing (Small / Medium / Large) and by call/registration capacity defined in the Cisco Expressway Administrator Guide. Login throttling and SIP/H.323 traversal limits are managed via per-zone and per-domain settings in the Expressway configuration UI rather than a uniform request-per-second policy.

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

It captures 2 rate-limit definitions, measuring varies and concurrent_calls.

An exhausted limit returns HTTP 429.

This profile was written by API Evangelist and has not been verified against a page the provider published; treat every limit as unconfirmed until a dated transcription replaces it.

The profile also includes 3 backoff/retry policies defined and response codes documented for throttled and serviceUnavailable.

Tagged areas include Collaboration, Unified Communications, Video Conferencing, and Rate Limiting.

2 Limits Exhausted: HTTP 429
Method: generated, dated 2026-05-05.
Written by API Evangelist on 2026-05-05 and not verified against a page the provider published. Treat every limit as unconfirmed until a dated transcription replaces it.
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CollaborationUnified CommunicationsVideo ConferencingRate Limiting

Limits

REST API requests appliance
varies
see Expressway Administrator Guide for capacity per appliance size
SIP / H.323 traversal calls appliance
concurrent_calls
see Cisco Expressway capacity datasheet (Small / Medium / Large)

Policies

Capacity-bounded
Limits are bounded by the Expressway VM/appliance size and Smart Licensing entitlement, not by a cloud-style per-second API throttle.
Backoff Strategy
Clients should implement exponential backoff with jitter on HTTP 429/503 responses from the REST or XML configuration APIs.
Administrative Throttles
Login throttling, registration restrictions, and per-zone bandwidth caps are configured by the appliance administrator and override default behavior.

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

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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/cisco-expressway-rate-limits"
All rate limits 
curl "https://apis.io/api/v1/rate-limits?limit=25"

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