---
title: "Estonia Consumer Price Index, 1997=100 (monthly)"
method: GET
path: "/api/v1/statistical-agencies/stat-estonia/cpi"
tags: ["Statistical Agencies"]
---

# Estonia Consumer Price Index, 1997=100 (monthly)

`GET /api/v1/statistical-agencies/stat-estonia/cpi`

Monthly Estonian CPI (`majandus/hinnad/IA002.px`, base 1997=100). Series from 1998M01. Default slice returns the Total commodity group (Kaubagrupp=1). Statistics Estonia refreshes this table around the 5th to 7th of each month for the prior month. For Eurostat-comparable HICP use the generic `/data/IA0230` endpoint.

## Query parameters

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

## Response `200`

Monthly CPI observations for the overall commodity aggregate.

- EnvelopeStatEstoniaCpiPayload
  - `data` StatEstoniaCpiPayload, required — CPI total, 1997=100 (IA002, monthly).
    - `title` string, nullable — Sugra-friendly description of the underlying PxWeb table.
    - `path` string, required — PxWeb path under `/en/stat/` including the correct `.px` / `.PX` extension.
    - `table_id` string, required — PxWeb table identifier with extension.
    - `frequency` string, nullable — Publication frequency.
    - `observations` StatEstoniaObservation[] — Observation rows, sorted by time ascending.
      - `period` string, required — Period code. `YYYYMNN` for monthly series (`2026M03`), `YYYYQN` for quarterly (`2025Q3`), or `YYYY` for annual. When the source splits year + quarter or year + month across two dimensions, Sugra combines them before emitting this field.
      - `time` string, nullable — ISO-8601 UTC timestamp for the first day of the period. `null` when the period cannot be mapped to a calendar date.
      - `value` number, nullable — First measure in the row, parsed as float. `null` when the upstream cell is suppressed (`..`) or missing (`.`).
      - `value_raw` string, nullable — Raw value string from PxWeb (useful for debugging).
    - `count` integer, required — Number of observations returned.
    - `metadata` StatEstoniaMetadata — Upstream metadata block with Sugra-normalised `updated`.
      - `updated` string, nullable — Last-updated timestamp for the table, sourced from the parent tree listing (POST responses return a sentinel `9999-12-31` that Sugra discards). Normalised from Europe/Tallinn local time to UTC ISO-8601.
      - `label` string, nullable — Upstream PxWeb label for the table.
      - `source` string, nullable — Attribution string as delivered by Statistics Estonia.
  - `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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