Fortnox · Rate Limits

Fortnox Rate Limits

Fortnox rate-limits the REST API per access-token. The documented limit is 300 requests per minute per access-token, enforced as a sliding window of roughly 25 requests per 5 seconds and scoped per client-id + tenant. Because the limit is per access-token, an integration serving many Fortnox tenants gets an independent 300 requests/minute allowance for each tenant's token. Exceeding the limit returns HTTP 429 (Too Many Requests). In November 2022 Fortnox raised the limit from 4 req/s (240/min) to 5 req/s (300/min).

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

It captures 2 rate-limit definitions, measuring requests.

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.

Tagged areas include Accounting, ERP, Rate Limiting, Quotas, and Sweden.

2 Limits Exhausted: HTTP 429
Method: generated, dated 2026-07-12.
Written by API Evangelist on 2026-07-12 and not verified against a page the provider published. Treat every limit as unconfirmed until a dated transcription replaces it.
View Source
AccountingERPRate LimitingQuotasSweden

Limits

REST API Requests access-token
requests · minute
300
Per access-token (per client-id + tenant). Enforced as a ~25 requests / 5s sliding window.
Sliding Window Burst access-token
requests · 5 seconds
25
Short-window burst ceiling underlying the per-minute limit.

Policies

Sliding Window
Requests are counted over a moving 5-second window; sustained rate must average within the window.
Per-Tenant Isolation
Each tenant's access-token has its own independent quota, so multi-tenant integrations scale linearly across customers.
Backoff Strategy
On HTTP 429, back off (exponential with jitter) and retry; prefer the WebSocket Topics stream over polling to stay under the limit.

Sources

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Tools for rate limits

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  • find_rate_limitsBrowse and filter every rate limit in the catalog.
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Call it yourself

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

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