---
title: "Theme taxonomy for the WHO GHO indicator catalog"
method: GET
path: "/api/v1/health/who/themes"
tags: ["Health"]
---

# Theme taxonomy for the WHO GHO indicator catalog

`GET /api/v1/health/who/themes`

Return the Sugra-derived theme taxonomy used to group the World Health Organization Global Health Observatory (WHO GHO) indicator catalog. WHO does not expose a /Theme endpoint upstream; Sugra synthesises themes from indicator-code prefixes (`HIV_`, `TB_`, `NCD_`, `TOBACCO_`, `MDG_`, `WHOSIS_`, `SDG`, and more). Pass any returned `theme` slug to `/indicators?theme=...` to filter the catalog.

## Response `200`

Theme slugs with their indicator-code prefixes and short descriptions.

- EnvelopeWhoGhoThemesPayload
  - `data` WhoGhoThemesPayload, required — Catalog of theme slugs derived from indicator-code prefixes. WHO GHO does not expose a /Theme endpoint upstream; this list is synthesized by Sugra from the indicator-code prefix taxonomy and is stable across requests.
    - `themes` WhoGhoTheme[], required — Theme entries. Use the `theme` slug on `/indicators?theme=...` to filter the catalog.
      - `theme` string, required — Theme slug (e.g. `hiv`, `tb`, `ncd`, `tobacco`, `sdg`).
      - `prefixes` string[], required — Indicator-code prefixes mapped to this theme (e.g. `HIV_`, `TB_`).
      - `description` string, nullable — Short description of what the theme covers.
    - `count` integer, required — Number of themes.
  - `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.
- `429` — Daily rate limit exceeded. Check `X-RateLimit-Reset` for the next window.
- `503` — Upstream source is temporarily unavailable. Retry after a short delay.

---

[API](https://skmtc.net/sugra/apis/sugra-api.md) · [All operations](https://skmtc.net/sugra/apis/sugra-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/sugra/sugra-api/revisions/d9a732d8e6be/schema)