Ably · Rate Limits

Ably Rate Limits

Ably gates per-account concurrent connections, channels, and per-second message rates by plan tier. Free is 200 connections / 500 msg/sec; Standard 10K / 2.5K; Pro 50K / 10K; Enterprise unlimited. The Control API enforces a separate per-token limit on management calls (typically 60 rpm). HTTP 429 is returned when caps are exceeded.

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

It captures 8 rate-limit definitions, measuring concurrent_connections, messages_per_second, and requests_per_minute.

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 2 backoff/retry policies defined and response codes documented for throttled.

Tagged areas include Realtime and Rate Limiting.

8 Limits Exhausted: HTTP 429
Method: generated, dated 2026-05-08.
Written by API Evangelist on 2026-05-08 and not verified against a page the provider published. Treat every limit as unconfirmed until a dated transcription replaces it.
View Source
RealtimeRate Limiting

Limits

Free - connections account
concurrent_connections
200
Free - message rate account
messages_per_second
500
Standard - connections account
concurrent_connections
10000
Standard - message rate account
messages_per_second
2500
Pro - connections account
concurrent_connections
50000
Pro - message rate account
messages_per_second
10000
Enterprise account
concurrent_connections
-1
Unlimited per contract.
Control API token
requests_per_minute
60

Policies

Backoff Strategy
Honor 429 Retry-After and apply exponential backoff with jitter.
Burst Control
Use channel namespacing and shard fan-out across many channels to stay under per-channel caps.

Sources

Work with this as data

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

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

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