Car Handshake

Car Handshake is a consumer-facing platform that aggregates new and used car listings from participating dealerships across the United States and Canada. It allows shoppers to compare vehicles, filter by price, make, model, and location, and directly contact dealers. The service also offers a public API (https://api.carhandshake.com/v1) providing vehicle inventory data for developers. Operated by Dealer Handshake Inc., Car Handshake emphasizes transparent pricing and a no‑login shopping experience.

Car Handshake is listed with 1 API on the APIs.io network. Tagged areas include Company, Car, Marketplace, and Automotive.

The Car Handshake catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

Car Handshake’s developer surface includes support, documentation, API reference, and 20 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

18.7/100 emerging Agent 29/100 agent ready Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

1 API 1 MCP Servers

CompanyCarMarketplace Automotive

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 18.7/100 · emerging

Contract Quality 4.0 / 21

Developer Ergonomics 1.8 / 17

Access Clarity 1.8 / 17

Operational Transparency 1.2 / 11

Contract Governance 2.2 / 10

Discoverability 4.1 / 9

Regulatory Posture 3.1 / 15

Agent readiness — 29/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 4 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 8 / 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):

Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
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)
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)
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document

8 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 19.0 — up to +20.3 composite points
Developer Ergonomics scores 10.7 — up to +17.9 composite points
Access Clarity scores 10.5 — up to +17.9 composite points

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.

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/carhandshake-com/apis.yml: open an issue on github.com/api-evangelist/carhandshake-com 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 →

Standards implemented 2

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

Agent2Agent

measured — observed by APIs.io (conformant)

Model Context Protocol (MCP)

measured — observed by APIs.io (documented)

APIs 1

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

Car Handshake API

Car Handshake API as documented publicly: 4 operations. Contract generated from the documentation by API Evangelist (2026-11-03); not the provider's own document.

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

Car Handshake MCP Server

Remote MCP server at mcp.carhandshake.com.

MCP SERVER

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Carhandshake Com Context

4 classes · 7 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Car Handshake API Rules

36 rules · 34 errors 1 warnings 1 info

SPECTRAL

JSON Schema 4

Standalone JSON Schema definitions for this provider's data models.

PostV1VehiclesSearchRequest

1 properties

JSON SCHEMA

PostV1VehiclesSearchResponse

2 properties

JSON SCHEMA

PostV31CarHandshakeA2ARequest

4 properties

JSON SCHEMA

PostV31CarHandshakeA2AResponse

2 properties

JSON SCHEMA

Security Posture 2

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

Carhandshake Com Domain Security

TLSv1.3 · HSTS

SECURITY

Carhandshake Com Vulnerability Disclosure

security.txt · contact published

SECURITY

Resources

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

MCPServer

MCPServer

WellKnown

WellKnown

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

DataModel

Conformance

Access & Security 6

Authentication, authorization, and security posture

Security

SecurityTxt

SecurityTxt

SecurityTxt

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 1

The organization behind the API

Website

Website

Other 3

Properties that don't map to a standard resource type

AgentCard

AgentCard

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: carhandshake-com
name: Car Handshake
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - security
  generated: '2026-11-06'
  method: derived
image: https://carhandshake.com/assets/hero-marketplace/hero-marketplace-1774.c7976bde55c56923.jpg
description: Car Handshake is a consumer-facing platform that aggregates new and used car listings from participating dealerships
  across the United States and Canada. It allows shoppers to compare vehicles, filter by price, make, model, and location,
  and directly contact dealers. The service also offers a public API (https://api.carhandshake.com/v1) providing vehicle inventory
  data for developers. Operated by Dealer Handshake Inc., Car Handshake emphasizes transparent pricing and a no‑login shopping
  experience.
url: https://artifacts.apis.io/carhandshake-com/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-11-03 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-11-03'
modified: '2026-11-03'
tags:
- Company
- Car
- Marketplace
- Automotive
tags_raw:
- Company
- Car
- Marketplace
- API
- Automotive
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Spectral
  url: rules/carhandshake-com-rules.yml
- type: JSONLD
  url: json-ld/carhandshake-com-context.jsonld
- type: Vocabulary
  url: vocabulary/carhandshake-com-vocabulary.yml
- type: DataModel
  url: data-model/carhandshake-com-data-model.yml
- type: Security
  url: security/carhandshake-com-vulnerability-disclosure.yml
- type: Conformance
  url: conformance/carhandshake-com-conformance.yml
- type: LLMsTxt
  url: llms/carhandshake-com-llms.txt
- type: AgentCard
  url: a2a/carhandshake-com-a2a.yml
- type: MCPServer
  url: mcp/carhandshake-com-mcp.yml
- type: SecurityTxt
  url: well-known/carhandshake-com-security.txt
- type: SecurityTxt
  url: well-known/carhandshake-com-mcp-security.txt
- type: SecurityTxt
  url: well-known/carhandshake-com-autoagentprotocol-security.txt
- type: WellKnown
  url: well-known/carhandshake-com-well-known.yml
- type: Hosts
  url: hosts/carhandshake-com-hosts.yml
- type: Vendors
  url: vendors/carhandshake-com-vendors.yml
- type: TermsOfService
  url: https://carhandshake.com/terms
- type: Support
  url: https://carhandshake.com/support
- type: PrivacyPolicy
  url: https://carhandshake.com/privacy
- type: Documentation
  url: https://carhandshake.com/guides
- type: APIReference
  url: https://carhandshake.com/llms.txt
- type: VulnerabilityDisclosure
  url: security/carhandshake-com-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/carhandshake-com-domain-security.yml
- type: Website
  url: https://carhandshake.com/
apis:
- aid: carhandshake-com:carhandshake-com-api
  name: Car Handshake API
  description: 'Car Handshake API as documented publicly: 4 operations. Contract generated from the documentation by API Evangelist
    (2026-11-03); not the provider''s own document.'
  humanURL: https://api.carhandshake.com/v1/openapi.json
  properties:
  - type: OpenAPI
    url: openapi/_ae-authored/carhandshake-com-openapi-generated.yml
    x-provenance: generated
  - type: JSONSchema
    url: json-schema/carhandshake-com-post-v31-car-handshake-a2-arequest-schema.json
  - type: JSONSchema
    url: json-schema/carhandshake-com-post-v31-car-handshake-a2-aresponse-schema.json
  - type: JSONSchema
    url: json-schema/carhandshake-com-post-v1-vehicles-search-request-schema.json
  - type: JSONSchema
    url: json-schema/carhandshake-com-post-v1-vehicles-search-response-schema.json
x-enrichment:
  date: '2026-11-03'
  status: enriched
  artifacts_added: 29
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

Car Handshake API — frequently asked questions

Does Car Handshake have an API?

Yes. APIs.io lists 1 API from Car Handshake, including Car Handshake API.

Is there an OpenAPI specification for the Car Handshake API?

Yes. APIs.io indexes 1 OpenAPI specification for Car Handshake, each linked for download from this page.

Does Car Handshake have an MCP server?

Yes. APIs.io lists 1 MCP server for Car Handshake: Remote MCP server at mcp.carhandshake.com.

Is the Car Handshake API ready for AI agents?

Car Handshake has a Kin Score of 18.7 out of 100 (emerging) and an Agent Readiness score of 29.1 (agent-ready), scored by API Evangelist on 2026-11-06.

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