GET/v1/cpi/categories

List all available CPI category codes and their descriptions

Return every CPI sub-category currently available for filtering in the CPI history endpoint. Use this as a discovery step before calling `GET /v1/cpi/countries/{code}/history?category=...`. **Common categories** (BLS naming — Eurostat HICP is mapped to the same codes via a crosswalk): - `SA0` — All items (headline CPI) - `SAF` — Food and beverages - `SAH` — Housing - `SAT` — Transportation - `SAM` — Medical care - `SAR` — Recreation - `SAE` — Education and communication - `SAC` — Apparel **Response shape:** a list of `CpiCategorySchema` items with code and human-readable description. Source: BLS CPI (US), Eurostat HICP (EU). Required scope: `costapi:read`.

Authentication

Requires API key via X-API-Key header.

Example request

curl

curl -X GET \
  "https://col.wageapi.com/api/v1/cpi/categories" \
  -H "X-API-Key: YOUR_API_KEY"

Responses

200Successful Response

dataarray<CpiCategorySchema>required

array of CpiCategorySchema

category_codestringrequired

category_namestringrequired

sourcestringrequired

metadataMetadataSchemarequired

sourcesarray<SourceSchema>optional

array of SourceSchema

namestringrequired

Data source name (e.g., 'BLS', 'OECD', 'Eurostat')

datasetstringrequired

Specific dataset identifier

urlanyoptional

URL to the source dataset

one of:

option 1:

string

option 2:

null

last_updatedanyoptional

When this data was last refreshed

one of:

option 1:

string (date-time)

option 2:

null

request_idstringrequired

Unique request identifier

rate_limitanyoptional

one of:

option 1:

remainingintegerrequired

Remaining requests today

daily_limitintegerrequired

Total daily request limit

reset_atstring (date-time)required

When the rate limit resets

option 2:

null

paginationanyoptional

one of:

option 1:

pageintegerrequired

page_sizeintegerrequired

totalintegerrequired

total_pagesintegerrequired

option 2:

null

data_vintageanyoptional

Data freshness (e.g., 'CPI data from February 2026')

one of:

option 1:

string

option 2:

null

methodology_notesanyoptional

Methodology notes (e.g., 'CPI rebased to 2020=100')

one of:

option 1:

string

option 2:

null

401Missing or invalid API key.

errorErrorDetailrequired

Structured error payload returned by all Aethar APIs. Mirrors the shape produced by aethar_auth.exception_handlers so the OpenAPI spec accurately describes real error bodies for documentation readers and MCP clients.

codestringrequired

Machine-readable error code (e.g. INVALID_API_KEY)

messagestringrequired

Human-readable error message

statusintegerrequired

HTTP status code

request_idstringrequired

Request identifier — include in support tickets

suggestionanyoptional

Actionable hint on how to resolve the error

one of:

option 1:

string

option 2:

null

doc_urlanyoptional

Link to full documentation for this error code

one of:

option 1:

string

option 2:

null

fieldanyoptional

Field that caused the error (if applicable)

one of:

option 1:

string

option 2:

null

errorsanyoptional

Per-field validation errors (only for 422 VALIDATION_ERROR responses)

one of:

option 1:

array of object

object

option 2:

null

403API key lacks the required scope for this endpoint.

errorErrorDetailrequired

codestringrequired

Machine-readable error code (e.g. INVALID_API_KEY)

messagestringrequired

Human-readable error message

statusintegerrequired

HTTP status code

request_idstringrequired

Request identifier — include in support tickets

suggestionanyoptional

Actionable hint on how to resolve the error

one of:

option 1:

string

option 2:

null

doc_urlanyoptional

Link to full documentation for this error code

one of:

option 1:

string

option 2:

null

fieldanyoptional

Field that caused the error (if applicable)

one of:

option 1:

string

option 2:

null

errorsanyoptional

Per-field validation errors (only for 422 VALIDATION_ERROR responses)

one of:

option 1:

array of object

object

option 2:

null

422Request validation failed (bad query params, unresolvable country, etc.).

errorErrorDetailrequired

codestringrequired

Machine-readable error code (e.g. INVALID_API_KEY)

messagestringrequired

Human-readable error message

statusintegerrequired

HTTP status code

request_idstringrequired

Request identifier — include in support tickets

suggestionanyoptional

Actionable hint on how to resolve the error

one of:

option 1:

string

option 2:

null

doc_urlanyoptional

Link to full documentation for this error code

one of:

option 1:

string

option 2:

null

fieldanyoptional

Field that caused the error (if applicable)

one of:

option 1:

string

option 2:

null

errorsanyoptional

Per-field validation errors (only for 422 VALIDATION_ERROR responses)

one of:

option 1:

array of object

object

option 2:

null

429Daily rate limit exceeded for this API key.

errorErrorDetailrequired

codestringrequired

Machine-readable error code (e.g. INVALID_API_KEY)

messagestringrequired

Human-readable error message

statusintegerrequired

HTTP status code

request_idstringrequired

Request identifier — include in support tickets

suggestionanyoptional

Actionable hint on how to resolve the error

one of:

option 1:

string

option 2:

null

doc_urlanyoptional

Link to full documentation for this error code

one of:

option 1:

string

option 2:

null

fieldanyoptional

Field that caused the error (if applicable)

one of:

option 1:

string

option 2:

null

errorsanyoptional

Per-field validation errors (only for 422 VALIDATION_ERROR responses)

one of:

option 1:

array of object

object

option 2:

null

500Unexpected server error. Includes a request_id for support.

errorErrorDetailrequired

codestringrequired

Machine-readable error code (e.g. INVALID_API_KEY)

messagestringrequired

Human-readable error message

statusintegerrequired

HTTP status code

request_idstringrequired

Request identifier — include in support tickets

suggestionanyoptional

Actionable hint on how to resolve the error

one of:

option 1:

string

option 2:

null

doc_urlanyoptional

Link to full documentation for this error code

one of:

option 1:

string

option 2:

null

fieldanyoptional

Field that caused the error (if applicable)

one of:

option 1:

string

option 2:

null

errorsanyoptional

Per-field validation errors (only for 422 VALIDATION_ERROR responses)

one of:

option 1:

array of object

object

option 2:

null

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