CurbSpec

CurbSpec (curbspec.com) is a used-vehicle research tool that compiles a one-time, frozen report from a VIN, a listing, or year/model/mileage: upcoming maintenance spend at the stated mileage, known mechanical issues, and NHTSA safety recalls and campaigns filtered to that vehicle. The preview is free and the full sheet unlocks for a one-time $12.99 (no subscription, no account, no ads). It is not a title or accident history report, and is unrelated to construction curb specifications. CurbSpec also publishes a remote MCP server (POST /api/mcp, tool check_vehicle, registry name io.github.swantron/curbspec) and a Chrome VIN checker extension. Publisher: a sole proprietorship of Joe Swanson, Bozeman, Montana.

CurbSpec is listed with 1 API on the APIs.io network. Tagged areas include Company, Automotive, Used Vehicles, VIN, and Vehicle History.

🌐 Visit website 📡 Profile data on GitHub

19.4/100 emerging Agent 7/100 agent aware Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

AccessFreemiumOpen⚡ Free to try

1 API 1 MCP Servers

Company Automotive Used Vehicles VIN Vehicle HistoryVehicle RecallsMaintenance MCP

Kin Score

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

Composite quality — 19.4/100 · emerging

Contract Quality 2.9 / 21

Developer Ergonomics 1.2 / 17

Access Clarity 7.2 / 17

Operational Transparency 0.0 / 11

Contract Governance 0.0 / 10

Discoverability 6.1 / 9

Regulatory Posture 1.2 / 15

Agent readiness — 7/100 · agent aware

Machine-Readable Contract 0 / 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 7 / 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 →
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 →
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0 Ask about this →

10 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 13.7 — up to +21.6 composite points Ask about this →
Developer Ergonomics scores 7.1 — up to +18.6 composite points Ask about this →
Operational Transparency scores 0.0 — up to +13.0 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/curbspec-com/apis.yml: open an issue on github.com/api-evangelist/curbspec-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 1

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.

Model Context Protocol (MCP)

measured — observed by APIs.io (documented)

APIs 1

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

CurbSpec MCP Server

Remote MCP server (registry name io.github.swantron/curbspec) exposing one tool, check_vehicle, which takes a VIN, pasted listing text or a free-text description plus mileage an...

MCP Servers 1

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

CurbSpec MCP Server

Remote MCP server published by CurbSpec (MCP registry name io.github.swantron/curbspec), documented in https://curbspec.com/llms.txt as "MCP: POST /api/mcp tool check_vehicle". ...

MCP SERVER

CurbSpec API pricing

Prices published by CurbSpec.

Plan	Price
Free preview	The preview is free
Full sheet	$12.99 one time

Plan details, limits and sources →

Pricing Plans 1

Published pricing tiers and plan structures.

CurbSpec Plans Pricing

2 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

CurbSpec Rate Limits

0 limits

RATE LIMITS

Terms of Service 1

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

CurbSpec

2 quoted statements, read from CurbSpec's own page on 2026-11-09.

TERMS

Privacy & Data 1

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

CurbSpec

11 quoted statements, read from CurbSpec's own page on 2026-11-09.

PRIVACY

JSON Schema 1

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

check_vehicle input

3 properties

JSON SCHEMA

Examples 1

Example request and response payloads for these APIs.

CurbSpec Mcp Tools List

3 fields

EXAMPLE

Security Posture 2

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

CurbSpec Authentication

0 schemes

SECURITY

CurbSpec Domain Security

TLSv1.3 · HSTS · DNSSEC

SECURITY

Resources

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

MCPServer

MCPServer

LLMsTxt

LLMsTxt

Build 3

SDKs, sample code, and the tooling you integrate with

SDKs

SDKs

Packages

Packages

BrowserExtension

BrowserExtension

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Commercial 4

Pricing, plans, and the legal terms of use

Plans

PrivacyPolicy

TermsOfService

UsageTerms

Company 1

The organization behind the API

Website

Website

Other 3

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

DataProcessing

DataProcessing

Source (apis.yml)

aid: curbspec-com
name: CurbSpec
description: 'CurbSpec (curbspec.com) is a used-vehicle research tool that compiles a one-time, frozen report from a VIN,
  a listing, or year/model/mileage: upcoming maintenance spend at the stated mileage, known mechanical issues, and NHTSA safety
  recalls and campaigns filtered to that vehicle. The preview is free and the full sheet unlocks for a one-time $12.99 (no
  subscription, no account, no ads). It is not a title or accident history report, and is unrelated to construction curb specifications.
  CurbSpec also publishes a remote MCP server (POST /api/mcp, tool check_vehicle, registry name io.github.swantron/curbspec)
  and a Chrome VIN checker extension. Publisher: a sole proprietorship of Joe Swanson, Bozeman, Montana.'
url: https://artifacts.apis.io/curbspec-com/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-11-04 (modular-v1; was harvest)
accessModel:
  pricing: freemium
  onboarding: open
  trial: false
  try_now: true
  public: true
  gated: none
  gated_source:
  - onboarding
  label: Freemium · Open access
  confidence: medium
  probe_state: covered
  source:
  - plans
  - authentication
  - security
  generated: '2026-11-13'
  method: derived
specificationVersion: '0.20'
created: '2026-11-04'
modified: '2026-11-04'
tags:
- Company
- Automotive
- Used Vehicles
- VIN
- Vehicle History
- Vehicle Recalls
- Maintenance
- MCP
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
image: https://curbspec.com/opengraph-image?869d04d74a0f058c
common:
- type: Plans
  url: plans/curbspec-com-plans-pricing.yml
- type: LLMsTxt
  url: llms/curbspec-com-llms.txt
- type: MCPServer
  url: mcp/curbspec-com-mcp.yml
- type: Hosts
  url: hosts/curbspec-com-hosts.yml
- type: Vendors
  url: vendors/curbspec-com-vendors.yml
- type: SDKs
  url: packages/curbspec-com-packages.yml
- type: Packages
  url: packages/curbspec-com-packages.yml
- type: DomainSecurity
  url: security/curbspec-com-domain-security.yml
- type: PrivacyPolicy
  url: https://curbspec.com/privacy
- type: TermsOfService
  url: https://curbspec.com/terms
- type: BrowserExtension
  url: https://curbspec.com/vin-checker-extension
- type: Website
  url: https://curbspec.com/
- type: LLMsTxt
  url: https://curbspec.com/llms.txt
- type: UsageTerms
  url: terms/curbspec-com-terms-of-service.yml
- type: DataProcessing
  url: privacy/curbspec-com-privacy-policy.yml
apis:
- name: CurbSpec MCP Server
  description: Remote MCP server (registry name io.github.swantron/curbspec) exposing one tool, check_vehicle, which takes
    a VIN, pasted listing text or a free-text description plus mileage and returns the same free CurbSpec vehicle preview
    (maintenance spend, known issues, NHTSA recalls) as the website, with a $12.99 Checkout link for the full report. Documented
    in https://curbspec.com/llms.txt as an MCP endpoint at POST /api/mcp with tool check_vehicle. No REST OpenAPI contract
    is published.
  humanURL: https://curbspec.com/llms.txt
  baseURL: https://curbspec.com/api/mcp
  tags:
  - MCP
  - VIN
  - Vehicle Recalls
  properties:
  - type: JSONSchema
    url: json-schema/curbspec-com-check-vehicle-input-schema.json
  - type: Examples
    url: examples/curbspec-com-mcp-tools-list.json
  aid: curbspec-com:curbspec-mcp-server
x-coverage:
  state: covered
  reason: identity-verified
  detail: Name, description and pointers read from curbspec.com homepage, llms.txt and terms; MCP registry entry io.github.swantron/curbspec
    names websiteUrl https://curbspec.com. GitHub repo swantron/curbspec listed in registry returns 404.
  evidence:
  - url: https://curbspec.com/
    status: 200
  - url: https://curbspec.com/privacy
    status: 200
  - url: https://curbspec.com/terms
    status: 200
  - url: https://curbspec.com/llms.txt
    status: 200
  - url: https://registry.modelcontextprotocol.io/v0/servers?search=curbspec
    status: 200
  - url: https://github.com/swantron/curbspec
    status: 404
x-enrichment:
  date: '2026-11-04'
  status: enriched
  artifacts_added: 16
  pass: modular-v1
  engine: identity=anthropic,contract=anthropic,surfaces=anthropic,docs=anthropic,regulatory=anthropic

CurbSpec API — frequently asked questions

Does CurbSpec have an API?

Yes. APIs.io lists 1 API from CurbSpec, including CurbSpec MCP Server.

How do I authenticate with the CurbSpec API?

CurbSpec documents its authentication (0 schemes). The details are profiled on APIs.io as CurbSpec Authentication.

How much does the CurbSpec API cost?

CurbSpec publishes its prices; its Free preview plan is The preview is free as of 2026-11-04. APIs.io lists 2 pricing plans for CurbSpec, with each plan's price, limits and inclusions under Pricing on this page.

Does CurbSpec have an MCP server?

Yes. APIs.io lists 1 MCP server for CurbSpec: Remote MCP server published by CurbSpec (MCP registry name io.github.swantron/curbspec), documented in https://curbspec.com/llms.txt as "MCP: POST /api/mcp tool check_vehicle". Probed 2026-11-04 with

Is the CurbSpec API ready for AI agents?

CurbSpec has a Kin Score of 19.4 out of 100 (emerging) and an Agent Readiness score of 7.2 (agent-aware), scored by API Evangelist on 2026-11-13.

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