Mart.dev

Mart.dev provides an unofficial, fast, and inexpensive API that delivers public LinkedIn data such as profiles, companies, posts, and jobs. It offers real‑time access without requiring LinkedIn credentials, delivering results in 1–2 seconds and supporting high request volumes. Free credits are available, and paid plans scale to millions of records.

Mart.dev publishes 2 APIs on the APIs.io network, including Linked In API, and 1 more. Tagged areas include Company, Data, LinkedIn, and Unofficial.

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

Mart.dev’s developer surface includes authentication, getting-started guide, documentation, signup flow, and 11 more developer resources.

🌐 Visit website 📡 Source on GitHub
31.1/100 thin Agent 24/100 agent aware Full breakdown ↓
scored 2026-10-04 · rubric v0.23.0
2 APIs
CompanyDataLinkedInUnofficial

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-10-04 · rubric v0.23.0
Composite quality — 31.1/100 · thin
Contract Quality 3.9 / 21
Developer Ergonomics 5.7 / 17
Access Clarity 9.4 / 17
Operational Transparency 0.0 / 11
Contract Governance 2.2 / 10
Discoverability 4.1 / 9
Regulatory Posture 3.7 / 15
Agent readiness — 24/100 · agent aware
Machine-Readable Contract 18 / 18
Agentic Access Contract 0 / 10
Documented Reversibility 6 / 6
MCP Server 0 / 12
Machine-Readable Auth 10 / 10
Idempotency 9 / 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 0 / 4
Consent & Bot Identity 0 / 3
A2A Agent Card 0 / 8
Dry-Run / Simulate Mode 4 / 4
Delegated User Identity 0 / 6
Protected Resource Metadata 0 / 5
Registration Without a Human 0 / 6
Agentic Commerce Well-Known Document 0 / 5
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 does not apply to this provider. The published contracts declare no write operations, and a read-only API cannot create-or-update. The facet is excluded from this provider's denominator entirely — not scored zero. A reference or data API is not deficient for being unable to upsert.
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/.
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 github.com/api-evangelist/mart-dev: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 2

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

Mart API

Provides endpoints for public LinkedIn data such as profiles, companies, posts, and jobs.

Mart.dev Linked In API

The Linked In API from Mart.dev — 1 operation(s) for linked in.

Pricing Plans 1

Published pricing tiers and plan structures.

Mart Dev Plans Pricing

2 plans

PLANS

Semantic Vocabularies 1

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

Mart Dev Context

1 classes · 8 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Mart.dev API Rules

12 rules · 10 errors 1 warnings 1 info

SPECTRAL

JSON Schema 1

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

GetV1LinkedinResponse

8 properties

JSON SCHEMA

Security Posture 2

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

Mart Dev Authentication

1 scheme

SECURITY

Mart Dev Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Get Started 2

Portal, sign-up, and the first successful call

GettingStarted
GettingStarted
 SignUp
SignUp

Documentation 1

Reference material describing how the API behaves

Documentation
Documentation

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Spectral
Spectral
 JSONLD
JSONLD
 Vocabulary
Vocabulary
 DataModel
DataModel
 Conformance
Conformance

Access & Security 2

Authentication, authorization, and security posture

Authentication
Authentication
 DomainSecurity
DomainSecurity

Commercial 3

Pricing, plans, and the legal terms of use

Plans
Plans
 TermsOfService
TermsOfService
 PrivacyPolicy
PrivacyPolicy

Company 1

The organization behind the API

Website
Website

Other 1

Properties that don't map to a standard resource type

Hosts
Hosts

Source (apis.yml)

apis.yml Raw ↑ 
aid: mart-dev
name: Mart.dev
image: https://mart.dev/logo.png
description: Mart.dev provides an unofficial, fast, and inexpensive API that delivers public LinkedIn data such as profiles,
  companies, posts, and jobs. It offers real‑time access without requiring LinkedIn credentials, delivering results in 1–2
  seconds and supporting high request volumes. Free credits are available, and paid plans scale to millions of records.
url: https://raw.githubusercontent.com/api-evangelist/mart-dev/refs/heads/main/apis.yml
x-type: company
x-source: harvest:new-submission
x-tier: profiled
x-tier-reason: enrichment pass 2026-09-28 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-09-28'
modified: '2026-09-28'
tags:
- Company
- Data
- LinkedIn
- Unofficial
tags_raw:
- Company
- API
- Data
- LinkedIn
- Unofficial
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Plans
  url: plans/mart-dev-plans-pricing.yml
- type: Spectral
  url: rules/mart-dev-rules.yml
- type: JSONLD
  url: json-ld/mart-dev-context.jsonld
- type: Vocabulary
  url: vocabulary/mart-dev-vocabulary.yml
- type: DataModel
  url: data-model/mart-dev-data-model.yml
- type: Authentication
  url: authentication/mart-dev-authentication.yml
- type: Conformance
  url: conformance/mart-dev-conformance.yml
- type: Hosts
  url: hosts/mart-dev-hosts.yml
- type: GettingStarted
  url: https://mart.dev/docs/#quickstart
- type: DomainSecurity
  url: security/mart-dev-domain-security.yml
- type: Website
  url: https://mart.dev/
- type: Documentation
  url: https://mart.dev/docs/
- type: SignUp
  url: https://mart.dev/login/
- type: TermsOfService
  url: https://mart.dev/terms/
- type: PrivacyPolicy
  url: https://mart.dev/privacy/
apis:
- name: Mart API
  description: Provides endpoints for public LinkedIn data such as profiles, companies, posts, and jobs.
  humanURL: https://mart.dev/docs/
  baseURL: null
  aid: mart-dev:mart-api
- aid: mart-dev:mart-dev-linked-in-api
  name: Mart.dev Linked In API
  description: The Linked In API from Mart.dev — 1 operation(s) for linked in.
  humanURL: https://mart.dev/docs/
  tags:
  - LinkedIn
  tags_raw:
  - Linked In
  properties:
  - type: OpenAPI
    url: openapi/mart-dev-linked-in-api-openapi.yml
  - type: JSONSchema
    url: json-schema/mart-dev-get-v1-linkedin-response-schema.json
x-submission-notes: Markets itself as 'the world's fastest and cheapest LinkedIn API' -- an UNOFFICIAL third-party LinkedIn
  data API (not LinkedIn's). Profile it as Mart.dev's own API; never attribute it to LinkedIn.
x-submission-probe: '2026-09-28: root 200, invented 404, docs 200'
x-submitted-by: support@mart.dev (apis.io/add, 2026-09-28)
x-coverage:
  state: unreadable
  reason: js-rendered-docs
  detail: Documentation is served as rendered HTML pages without a machine‑readable OpenAPI or other contract.
  evidence:
  - url: https://mart.dev/docs/
    status: 200
  checked: '2026-09-28'
x-enrichment:
  date: '2026-09-28'
  status: enriched
  artifacts_added: 15
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

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