TheCarApi SEO helpers API
Build popular landing pages and resolve brand/model URL slugs.
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OpenAPI Specification
openapi: 3.2.0
info:
title: TheCarApi — Public SEO helpers API
version: '2026-08-19'
summary: Multi-source vehicle auction inventory API
description: 'Normalized vehicle auction inventory from Auto1, OpenLane, Schadeautos, Copart Germany,
eCarsTrade, Encar and the Japanese auction houses, plus a European retail classifieds network.
A vehicle is addressed by the pair site_name + auction_id_str, for example encar/38112900.
Primary envelopes carry contract_version, request_id, server_time and data_updated_at; a handful of routes omit those.
Price fields are JSON numbers, never strings.
Full documentation: https://thecarapi.com/docs'
contact:
name: TheCarApi API support
email: api@thecarapi.com
url: https://thecarapi.com/contact
termsOfService: https://thecarapi.com/terms
servers:
- url: https://api.thecarapi.com
description: Production
security:
- apiKeyHeader: []
- bearerAuth: []
tags:
- name: SEO helpers
description: Build popular landing pages and resolve brand/model URL slugs.
externalDocs:
url: https://thecarapi.com/docs/seo
paths:
/api/seo/popular-searches:
get:
operationId: get_api_seo_popular_searches
summary: List the most common live brand/model searches
description: List the most common live brand/model searches.
tags:
- SEO helpers
security:
- apiKeyHeader: []
- bearerAuth: []
x-scope: seo
x-examples:
- GET https://api.thecarapi.com/api/seo/popular-searches
- GET https://api.thecarapi.com/api/seo/popular-searches?limit=50
parameters:
- name: limit
in: query
required: false
description: 'Number of results from 1 to 200. Default 20. Value comes from: Result count chosen by your application.'
schema:
type: integer
example: '50'
responses:
'200':
description: Success.
content:
application/json:
schema:
type: object
example:
success: true
results:
- brand: BMW
model: 320d
brand_slug: bmw
model_slug: 320d
count: 210
'400':
$ref: '#/components/responses/BadRequest'
'401':
$ref: '#/components/responses/Unauthorized'
'403':
$ref: '#/components/responses/Forbidden'
'404':
$ref: '#/components/responses/NotFound'
'429':
$ref: '#/components/responses/RateLimited'
/api/seo/brand-model-from-slug:
get:
operationId: get_api_seo_brand_model_from_slug
summary: Resolve brand and model slugs to their canonical display names
description: 'Resolve brand and model slugs to their canonical display names.
Returns 404 unless the slug pair identifies exactly one live brand/model combination.'
tags:
- SEO helpers
security:
- apiKeyHeader: []
- bearerAuth: []
x-scope: seo
x-examples:
- GET https://api.thecarapi.com/api/seo/brand-model-from-slug?brand_slug=bmw&model_slug=320d
- GET https://api.thecarapi.com/api/seo/brand-model-from-slug?brand_slug=volvo&model_slug=xc60
parameters:
- name: brand_slug
in: query
required: true
description: 'Brand slug, such as bmw. Value comes from: /api/seo/popular-searches -> results[].brand_slug'
schema:
type: string
example: bmw
- name: model_slug
in: query
required: true
description: 'Model slug, such as 320d. Value comes from: /api/seo/popular-searches -> results[].model_slug'
schema:
type: string
example: 320d
responses:
'200':
description: Success.
content:
application/json:
schema:
type: object
example:
success: true
brand: BMW
model: 320d
'400':
$ref: '#/components/responses/BadRequest'
'401':
$ref: '#/components/responses/Unauthorized'
'403':
$ref: '#/components/responses/Forbidden'
'404':
$ref: '#/components/responses/NotFound'
'429':
$ref: '#/components/responses/RateLimited'
components:
responses:
Forbidden:
description: Revoked key, or scope, IP, or origin denial.
content:
application/json:
schema:
type: object
properties:
success:
type: boolean
enum:
- false
error:
type: string
description: Sanitized failure message.
RateLimited:
description: Authentication lockout or quota exceeded. Honour Retry-After.
content:
application/json:
schema:
type: object
properties:
success:
type: boolean
enum:
- false
error:
type: string
description: Sanitized failure message.
BadRequest:
description: Invalid filter, pagination, source, parameter, or request body.
content:
application/json:
schema:
type: object
properties:
success:
type: boolean
enum:
- false
error:
type: string
description: Sanitized failure message.
NotFound:
description: Source-aware resource not found.
content:
application/json:
schema:
type: object
properties:
success:
type: boolean
enum:
- false
error:
type: string
description: Sanitized failure message.
Unauthorized:
description: Missing, invalid, or expired API key.
content:
application/json:
schema:
type: object
properties:
success:
type: boolean
enum:
- false
error:
type: string
description: Sanitized failure message.
securitySchemes:
apiKeyHeader:
type: apiKey
in: header
name: X-API-Key
bearerAuth:
type: http
scheme: bearer
externalDocs:
description: API reference
url: https://thecarapi.com/docs