FlightCar

FlightCar was a United States peer-to-peer car-rental marketplace built around airport travel, surfaced into the API Evangelist network as an a16z portfolio lead. Enrichment probing on 2026-07-20 found no operating company behind the name and no API surface of any kind. The domain flightcar.com is registered but publishes no A, AAAA or MX records, resolves to no host, and sits on Njalla privacy nameservers with a SOA serial dated 2026-07-18; the api, developer and docs subdomains do not resolve; there is no GitHub organisation at github.com/flightcar; and no first-party client library exists on npm or PyPI. The Internet Archive shows the consumer site returning 200 through May 2016 and an Internal Server Error by July 2017, with no successful captures in 2017 or 2018. FlightCar is therefore carried in the network as a defunct company retained for portfolio-graph and historical continuity rather than as an active API provider, and should not be re-queued for artifact enrichment.

FlightCar is profiled on the APIs.io network. Tagged areas include Company, Defunct, Transportation, Travel, and Automotive.

📡 Profile data on GitHub

0.0/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

0 APIs

Company Defunct Transportation Travel Automotive Car Rental Marketplace Peer-to-Peer Mobility

Kin Score

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

Composite quality — 0.0/100 · minimal

Contract Quality 0.0 / 21

Developer Ergonomics 0.0 / 17

Access Clarity 0.0 / 17

Operational Transparency 0.0 / 11

Contract Governance 0.0 / 10

Discoverability 0.0 / 9

Regulatory Posture 0.9 / 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
MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
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

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
Developer Ergonomics scores 0.0 — up to +20.0 composite points
Access Clarity scores 0.0 — up to +20.0 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/flightcar/apis.yml: open an issue on github.com/api-evangelist/flightcar 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 →

Security Posture 1

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

Flightcar Domain Security

no transport/DNS hardening detected

SECURITY

Resources

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Source (apis.yml)

aid: flightcar
deliveryModel:
  model: unknown
  open_source: false
  commercial: false
  callable_host: false
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - none
  generated: '2026-08-28'
  method: derived
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://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/flightcar.png
name: FlightCar
description: FlightCar was a United States peer-to-peer car-rental marketplace built around airport travel, surfaced into
  the API Evangelist network as an a16z portfolio lead. Enrichment probing on 2026-07-20 found no operating company behind
  the name and no API surface of any kind. The domain flightcar.com is registered but publishes no A, AAAA or MX records,
  resolves to no host, and sits on Njalla privacy nameservers with a SOA serial dated 2026-07-18; the api, developer and docs
  subdomains do not resolve; there is no GitHub organisation at github.com/flightcar; and no first-party client library exists
  on npm or PyPI. The Internet Archive shows the consumer site returning 200 through May 2016 and an Internal Server Error
  by July 2017, with no successful captures in 2017 or 2018. FlightCar is therefore carried in the network as a defunct company
  retained for portfolio-graph and historical continuity rather than as an active API provider, and should not be re-queued
  for artifact enrichment.
url: https://raw.githubusercontent.com/api-evangelist/flightcar/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- a16z
x-tier: stub
x-tier-reason: portfolio-lead
x-status: defunct
x-status-evidence:
  probed: '2026-07-20'
  domain_registered: true
  domain_resolves: false
  live_website: false
  github_org: false
  first_party_packages: false
  api_surface: none
  last_successful_archive_capture: '2016-05-13'
  first_failing_archive_capture: '2017-07-05'
  probes_run: DNS (A/AAAA/MX/TXT/DNSKEY/CAA/SOA/NS), whois, HTTPS reachability on the apex plus www/api/developer/docs, github.com/flightcar,
    GitHub repository search, npm registry search, PyPI, and Internet Archive CDX. All returned negative or unrelated results.
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-20'
tags:
- Company
- Defunct
- Transportation
- Travel
- Automotive
- Car Rental
- Marketplace
- Peer-to-Peer
- Mobility
tags_raw:
- Company
- Defunct
- Transportation
- Travel
- Automotive
- Car Rental
- Marketplace
- Peer To Peer
- Mobility
apis: []
common:
- type: DomainSecurity
  url: security/flightcar-domain-security.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-07-20'
  status: minimal
  artifacts_added: 1
  pass: local-v1

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