One Auto API

One Auto API provides comprehensive automotive data APIs for vehicle lookup, valuations, retail pricing, and more across the US, UK, and Europe. Their platform offers over 100 API methods covering car images, mileage checks, specifications, electric vehicle data, registration lookup, service history, and valuation, all accessible via a single subscription and monthly invoice. Designed for developers, product managers, and dealers, the service includes bulk report building, VRM360 insights, and consultancy services, backed by multiple data providers.

One Auto API is listed with 1 API on the APIs.io network. Tagged areas include Automotive, Data, Vehicles, and United Kingdom.

One Auto API’s developer surface includes changelog, documentation, API reference, getting-started guide, pricing, engineering blog, support, and 13 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

22.5/100 emerging ▲ 9.4 Agent 0/100 human only Heartbeat 100/100 alive Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

1 API

Automotive Data Vehicles United Kingdom

Kin Score

Kin Score How this is scored →
scored 2026-11-13 · rubric v0.28.0

Composite quality — 22.5/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 6.1 / 17

Access Clarity 8.3 / 17

Operational Transparency 1.6 / 11

Contract Governance 0.0 / 10

Discoverability 4.1 / 9

Regulatory Posture 1.2 / 15

Agent readiness — 0/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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Agent readiness — checks not met, largest first (exact, from this profile):

Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document Ask about this →
MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship Ask about this →
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author Ask about this →
Machine-Readable Auth +10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey) Ask about this →
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented) Ask about this →
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes Ask about this →

13 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Contract Quality scores 0.0 — up to +25.0 composite points Ask about this →
Developer Ergonomics scores 35.7 — up to +12.9 composite points Ask about this →
Contract Governance scores 0.0 — up to +12.0 composite points Ask about this →

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

Not sure how this applies to your stack? Ask about any one item. Kin Lane reads every question, looks at your profile and your situation, and replies with what a fix would take — scoped to that one area, priced up front, yours whether you ship it or not. Ask a question →

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from the provider profile at artifacts.apis.io/oneautoapi/apis.yml: open an issue on github.com/api-evangelist/oneautoapi to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 1

Individual APIs this provider publishes, each with its own machine-readable definition.

One Auto API

Automotive data APIs providing vehicle identity, history, valuations, specs and images.

Terms of Service 1

What its API terms permit and prohibit, quoted from its own page.

One Auto API

11 quoted statements, read from One Auto API's own page on 2026-11-10.

TERMS

Privacy & Data 1

Its role, the data it processes, retention and transfers, quoted from its own privacy page.

One Auto API

23 quoted statements, read from One Auto API's own page on 2026-11-10.

PRIVACY

Eligibility 1

Who may sign up and where, quoted from its own terms.

One Auto API

2 quoted statements, read from One Auto API's own page on 2026-11-10.

ELIGIBILITY

Data License 1

How its data and outputs may be reused, quoted from its own terms.

One Auto API

2 quoted statements, read from One Auto API's own page on 2026-11-10.

LICENSE

Security Posture 1

Authentication, domain security, vulnerability disclosure, and trust-center signals.

One Auto API Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Resources

Get Started 2

Portal, sign-up, and the first successful call

Login

GettingStarted

GettingStarted

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 3

Status, limits, changes, and where to get help

ChangeLog

ChangeLog

ChangeLog

ChangeLog

Support

Support

Commercial 5

Pricing, plans, and the legal terms of use

PrivacyPolicy

Pricing

TermsOfService

UsageTerms

DataLicense

Company 3

The organization behind the API

BlogRSS

BlogRSS

Website

Website

Blog

Blog

Other 4

Properties that don't map to a standard resource type

Hosts

Vendors

DataProcessing

Eligibility

Source (apis.yml)

aid: oneautoapi
name: One Auto API
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  probe_state: unreadable
  source:
  - security
  generated: '2026-11-13'
  method: derived
image: https://www.oneautoapi.com/images/og-image.png
description: One Auto API provides comprehensive automotive data APIs for vehicle lookup, valuations, retail pricing, and
  more across the US, UK, and Europe. Their platform offers over 100 API methods covering car images, mileage checks, specifications,
  electric vehicle data, registration lookup, service history, and valuation, all accessible via a single subscription and
  monthly invoice. Designed for developers, product managers, and dealers, the service includes bulk report building, VRM360
  insights, and consultancy services, backed by multiple data providers.
url: https://raw.githubusercontent.com/api-evangelist/oneautoapi/refs/heads/main/apis.yml
x-type: company
x-source: harvest:new-submission
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-02 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-02'
modified: '2026-10-06'
tags:
- Automotive
- Data
- Vehicles
- United Kingdom
tags_raw:
- Automotive
- Data
- API
- Vehicle
- UK
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- url: https://go.oneautoapi.com/blog/feed/
  type: BlogRSS
- type: PrivacyPolicy
  url: https://www.oneautoapi.com/privacy-policy/
- type: ChangeLog
  url: changelog/oneautoapi-changelog.yml
- type: Hosts
  url: hosts/oneautoapi-hosts.yml
- type: Vendors
  url: vendors/oneautoapi-vendors.yml
- type: Login
  url: https://www.oneautoapi.com/login/
- type: ChangeLog
  url: https://docs.oneautoapi.com/changelog/
- type: DomainSecurity
  url: security/oneautoapi-domain-security.yml
- type: Website
  url: https://www.oneautoapi.com/
- type: Documentation
  url: https://docs.oneautoapi.com/
- type: APIReference
  url: https://swagger.oneautoapi.com/
- type: GettingStarted
  url: https://www.oneautoapi.com/signup/
- type: Pricing
  url: https://www.oneautoapi.com/pricing/
- type: Blog
  url: https://go.oneautoapi.com/blog/
- type: Support
  url: https://www.oneautoapi.com/contact/
- type: TermsOfService
  url: https://www.oneautoapi.com/terms/
- type: UsageTerms
  url: terms/oneautoapi-terms-of-service.yml
- type: DataProcessing
  url: privacy/oneautoapi-privacy-policy.yml
- type: Eligibility
  url: eligibility/oneautoapi-eligibility.yml
- type: DataLicense
  url: data-license/oneautoapi-data-license.yml
apis:
- name: One Auto API
  description: Automotive data APIs providing vehicle identity, history, valuations, specs and images.
  humanURL: https://www.oneautoapi.com/
  baseURL: null
  aid: oneautoapi:one-auto-api
x-coverage:
  state: unreadable
  reason: js-rendered-docs
  detail: Documentation pages redirect to JavaScript‑rendered SPA with no machine‑readable spec.
  evidence:
  - url: https://www.oneautoapi.com/docs/
    status: 308
  checked: '2026-10-02'
x-submission-notes: UK automotive data APIs (vehicle lookup, valuations, retail pricing).
x-submission-probe: root 200; docs 200; swagger.oneautoapi.com 200 (spec file not located); llms.txt 404; 404 probe 404
x-enrichment:
  date: '2026-10-02'
  status: enriched
  artifacts_added: 7
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

One Auto API — frequently asked questions

Does One Auto API have an API?

Yes. APIs.io lists 1 API from One Auto API, including One Auto API.

Is the One Auto API ready for AI agents?

One Auto API has a Kin Score of 22.5 out of 100 (emerging) and an Agent Readiness score of 0.0 (human-only), scored by API Evangelist on 2026-11-13.

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