PowerSync · Rate Limits

Powersync Rate Limits

PowerSync Cloud enforces concurrent connection limits per plan tier; a 429 status is returned when the peak concurrent connection limit is exceeded. Throughput limits govern database replication from source to PowerSync Service and client sync from PowerSync to clients.

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

It captures 10 rate-limit definitions, measuring concurrent_connections, operations_per_second, mb_per_second, transactions_per_second, and buckets.

Limit state is signalled in the retryAfter response header, and 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 response codes documented for throttled.

Tagged areas include Rate Limiting.

10 Limits Exhausted: HTTP 429 retryAfter
Method: generated, dated 2026-06-12.
Written by API Evangelist on 2026-06-12 and not verified against a page the provider published. Treat every limit as unconfirmed until a dated transcription replaces it.
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Rate Limiting

Limits

Peak Concurrent Connections (Free) org
concurrent_connections · session
50
Peak Concurrent Connections (Pro) org
concurrent_connections · session
1000
Peak Concurrent Connections (Team) org
concurrent_connections · session
10000
Database Replication Throughput (small rows) org
operations_per_second · second
4000
Database Replication Throughput (large rows) org
mb_per_second · second
5
Replication Transactions org
transactions_per_second · second
60
Client Sync Throughput (per client) user
operations_per_second · second
20000
Synced Buckets Per User user
buckets · session
1000
Row / Document Size org
mb_per_row · usage
15
Columns Per Table org
columns · usage
1999

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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Call it yourself

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

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