Kno2 · Rate Limits

Kno2 Rate Limits

Kno2 does not publish fixed numeric rate limits for the Communication API. As a partner/enterprise, per-subscription API, throughput and any throttling are governed by the subscription agreement rather than a public per-minute cap. Kno2's own reference client consumes inbound messages by polling GET /api/messages on a loop with a 10-second wait between empty polls, which implies clients are expected to poll on a modest cadence rather than hammer the endpoint. All values here are modeled - confirm concrete limits with Kno2 during onboarding.

Kno2 Rate Limits is the machine-readable rate-limit profile for Kno2 on the APIs.io network, conforming to the API Commons Rate Limits specification.

It captures 3 rate-limit definitions, measuring requests and source-ip.

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

Tagged areas include Healthcare Interoperability, Direct Secure Messaging, FHIR, Rate Limiting, and Quotas.

3 Limits Throttle: 429
Healthcare InteroperabilityDirect Secure MessagingFHIRRate LimitingQuotas

Limits

Communication API Requests subscription
requests
not published
No fixed numeric request-rate limit is documented; governed per subscription agreement.
Intake Polling subscription
requests
client-paced (~10s interval in reference client)
The reference client polls GET /api/messages and waits 10 seconds between empty polls.
IP Allowlist subscription
source-ip
allowlisted only
Calls are rejected unless the caller's public IP is allowlisted by a Kno2 admin.

Policies

Backoff Strategy
Clients should implement exponential backoff with jitter and honor Retry-After on 429 responses.
Polling Cadence
Intake/receive is client-initiated polling; poll on a modest interval rather than continuously.
Transport Security
TLS 1.2 or higher is required for all integrations.

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/kno2-rate-limits"
All rate limits 
curl "https://apis.io/api/v1/rate-limits?limit=25"

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