Synthflow · Rate Limits

Synthflow Rate Limits

Synthflow documents two throttles, and both are call-shaped rather than request-shaped: Concurrent Active Calls (how many calls can be live at once) and CAPS, Call Attempts Per Second (how fast new calls can be started through the Make a Phone Call endpoint). Neither has a published number — both are scoped per account or shown in workspace/account terms. There is no documented general HTTP request rate limit for the other 99 operations, and no rate-limit response headers are published.

Synthflow Rate Limits is the machine-readable rate-limit profile for Synthflow on the APIs.io network, conforming to the API Commons Rate Limits specification.

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

The profile also includes response codes documented for throttled and note.

Tagged areas include Rate Limiting, Concurrency, CAPS, and Telephony.

2 Limits Throttle: 429
Rate LimitingConcurrencyCAPSTelephony

Limits

Concurrent Active Calls workspace
concurrent_calls · instantaneous
CAPS (Call Attempts Per Second) workspace
call_attempts_per_second · second

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

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

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