---
title: "Norway GDP, monthly (SA, differentiator)"
method: GET
path: "/api/v1/statistical-agencies/ssb/gdp/monthly"
tags: ["Statistical Agencies"]
---

# Norway GDP, monthly (SA, differentiator)

`GET /api/v1/statistical-agencies/ssb/gdp/monthly`

Norwegian monthly GDP at market values (SSB table 11721). Monthly GDP is rarely published by statistical offices, making this a Nordic-specific differentiator. Constant 2023-prices, seasonally adjusted. Measures include month-on-month volume change and year-on-year volume change.

## Query parameters

- `last_n` integer — Number of most-recent months to return.

## Response `200`

Monthly GDP observations.

- EnvelopeSsbGdpMonthlyPayload
  - `data` SsbGdpMonthlyPayload, required — GDP, Final expenditure, seasonally adjusted (table 11721, monthly).
    - `title` string, nullable — Sugra-friendly title for the SSB table.
    - `path` string, required — SSB PxWeb numeric table ID (globally unique under /en/table/).
    - `frequency` string, nullable — Publication frequency: monthly, quarterly, or annual.
    - `category` string, nullable — Sugra category tag (inflation, growth, labour, trade, etc).
    - `dimensions` string[] — PxWeb dimension codes present in the response, excluding time.
    - `measures` string[] — ContentsCode values requested; each becomes a numeric column in observations.
    - `observations` SsbObservation[] — Tidy observation rows sorted by time ascending.
      - `time` string, required — Observation period in ISO form. YYYY-MM for monthly series, YYYY-QN for quarterly, YYYY for annual.
    - `row_count` integer, required — Number of observation rows returned.
    - `labels` object — Dimension label map: {dim_code: {value_code: human_label}}.
  - `meta` SugraMeta, required — Metadata attached to every /api/v1/* response envelope.
    - `endpoint` string, required — Requested endpoint path.
    - `data_time` string, required — ISO 8601 UTC timestamp of the source data, not of the request.
    - `response_time` string, required — ISO 8601 UTC timestamp when this response was produced.
    - `provider` string, required — API name and version.
    - `source` string, nullable — Identifier of the primary upstream source used for this response.
    - `attribution` string, nullable — Human-readable attribution mandated by an upstream source (e.g. a securities regulator or self-regulatory organization). Present only on responses whose source requires the owner and source to be clearly identified. Do not remove or alter it when using the response.
    - `fallback_used` boolean, nullable — True when the primary source failed and a fallback produced the data.
    - `fallback_chain` string[], nullable — Ordered list of sources attempted, in the order they were tried.
    - `cached` boolean, nullable — True when this response was served from the internal cache.
    - `stale` boolean, nullable — True when the cached response was returned after the upstream rate-limited or errored. Clients can use this to detect degraded data.

## Other responses

- `401` — Missing or invalid `x-api-key` header. JSON body with a stable `code` distinguishing `missing_api_key` (no header sent) from `invalid_api_key` (header sent, key not accepted); any other 401 source carries the generic `unauthorized` with its detail as `reason`. Plus `hint`. `plan` is always null on 401 - an unauthenticated request has no plan; quota exhaustion is 429, not 401.
- `422` — Validation Error
- `429` — Daily rate limit exceeded. Check `X-RateLimit-Reset` for the next window.
- `503` — Upstream source is temporarily unavailable. Retry after a short delay.

---

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