Litmus Hiring

Litmus is a Y Combinator-backed technical hiring platform that turns repositories, engineering tickets, and job descriptions into structured, project-based technical assessments and interview pipelines tailored to how a team actually ships. It evaluates candidates on both code quality and development process, lets them work in their own IDE or terminal, and captures AI-tool usage (Claude Code, Copilot CLI) transparently. Candidate management syncs with the Ashby, Greenhouse, and Lever applicant-tracking systems. Litmus exposes a bearer-key REST API (roles, invites, submissions) and an official hosted Model Context Protocol (MCP) server for agent-driven access to submissions, candidates, pipeline status, and assessment authoring.

Litmus Hiring publishes 3 APIs on the APIs.io network: Invites API, Roles API, and Submissions API. Tagged areas include Company, Hiring, Recruitment, Technical Assessment, and Developer Hiring.

Litmus Hiring’s developer surface includes documentation, API reference, getting-started guide, support, authentication, and 16 more developer resources.

🌐 Visit website 📡 Source on GitHub

36.5/100 thin ▬ flat Agent 41/100 agent ready saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

AccessSelf serve

1 APIs 1 MCP Servers

Company Hiring Recruitment Technical AssessmentDeveloper HiringMCP Interviewing Y Combinator

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 36.5/100 · thin

Contract Quality 12.8 / 23

Developer Ergonomics 10.2 / 18

Access Clarity 3.8 / 18

Operational Transparency 0.0 / 12

Contract Governance 0.5 / 11

Discoverability 6.2 / 9

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 41/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 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 6 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 6 / 6

Agentic Commerce Well-Known Document 0 / 5

Create-or-Update Ergonomics applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

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/litmus-hiring: 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 3

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

Litmus Hiring Invites API

Candidate invitations

Litmus Hiring Roles API

Open roles within your organization

Litmus Hiring Submissions API

Candidate assessment submissions

Open Collections 4

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

API Collection

OPEN COLLECTION

Litmus Hiring REST Invites API

OPEN COLLECTION

Litmus Hiring REST Invites Roles API

OPEN COLLECTION

Litmus Hiring REST Invites Submissions API

OPEN COLLECTION

MCP Servers 1

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

Litmus Hiring MCP Server

Official hosted Model Context Protocol server for the Litmus hiring platform. Connects Claude Desktop, Claude Code, or Cursor (via Clerk OAuth) and headless/automation clients (...

MCP SERVER

Security Posture 2

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

Litmus Hiring Authentication

http/oauth2 · 2 schemes

SECURITY

Litmus Hiring Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Litmus Hiring Scopes

7 scopes · authorizationCode

7 scopes

SCOPES

Resources

Get Started 2

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

MCPServer

WellKnown

LLMsTxt

AgentSkill

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Conventions

ErrorCatalog

Lifecycle

Conformance

DataModel

Access & Security 3

Authentication, authorization, and security posture

Authentication

Authentication

OAuthScopes

OAuthScopes

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 2

Pricing, plans, and the legal terms of use

PrivacyPolicy

PrivacyPolicy

TermsOfService

TermsOfService

Company 1

The organization behind the API

Website

Website

Other 1

Properties that don't map to a standard resource type

Overlay

Overlay

Source (apis.yml)

aid: litmus-hiring
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Self-serve signup
  confidence: medium
  source:
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/litmus-hiring.png
name: Litmus Hiring
description: Litmus is a Y Combinator-backed technical hiring platform that turns repositories, engineering tickets, and job
  descriptions into structured, project-based technical assessments and interview pipelines tailored to how a team actually
  ships. It evaluates candidates on both code quality and development process, lets them work in their own IDE or terminal,
  and captures AI-tool usage (Claude Code, Copilot CLI) transparently. Candidate management syncs with the Ashby, Greenhouse,
  and Lever applicant-tracking systems. Litmus exposes a bearer-key REST API (roles, invites, submissions) and an official
  hosted Model Context Protocol (MCP) server for agent-driven access to submissions, candidates, pipeline status, and assessment
  authoring.
url: https://raw.githubusercontent.com/api-evangelist/litmus-hiring/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- y-combinator
x-tier: profiled
x-tier-reason: enriched-from-provider-surface
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-20'
tags:
- Company
- Hiring
- Recruitment
- Technical Assessment
- Developer Hiring
- MCP
- Interviewing
- Y Combinator
common:
- type: Overlay
  url: overlays/litmus-hiring-overlay.yaml
- url: https://litmushiring.com
  type: Website
- url: https://litmushiring.com/docs
  type: DeveloperPortal
- url: https://litmushiring.com/docs
  type: Documentation
- url: https://litmushiring.com/docs/rest
  type: APIReference
- url: https://litmushiring.com/docs/mcp/quickstart
  type: GettingStarted
- url: https://litmushiring.com/privacy
  type: PrivacyPolicy
- url: https://litmushiring.com/terms
  type: TermsOfService
- url: mailto:support@litmushiring.com
  type: Support
- url: mcp/litmus-hiring-mcp.yml
  type: MCPServer
- url: authentication/litmus-hiring-authentication.yml
  type: Authentication
- url: scopes/litmus-hiring-scopes.yml
  type: OAuthScopes
- url: conventions/litmus-hiring-conventions.yml
  type: Conventions
- url: errors/litmus-hiring-problem-types.yml
  type: ErrorCatalog
- url: lifecycle/litmus-hiring-lifecycle.yml
  type: Lifecycle
- url: conformance/litmus-hiring-conformance.yml
  type: Conformance
- url: data-model/litmus-hiring-data-model.yml
  type: DataModel
- url: well-known/litmus-hiring-well-known.yml
  type: WellKnown
- url: llms/litmus-hiring-llms.txt
  type: LLMsTxt
- url: skills/_index.yml
  type: AgentSkill
- url: security/litmus-hiring-domain-security.yml
  type: DomainSecurity
apis:
- aid: litmus-hiring:litmus-hiring-invites-api
  name: Litmus Hiring Invites API
  description: Candidate invitations
  humanURL: https://litmushiring.com/docs/rest
  baseURL: https://www.litmushiring.com/api/v1
  tags:
  - Invites
  properties:
  - type: OpenAPI
    url: openapi/litmus-hiring-invites-api-openapi.yml
  - type: Documentation
    url: https://litmushiring.com/docs/rest
  - type: APIReference
    url: https://litmushiring.com/docs/rest
- aid: litmus-hiring:litmus-hiring-roles-api
  name: Litmus Hiring Roles API
  description: Open roles within your organization
  humanURL: https://litmushiring.com/docs/rest
  baseURL: https://www.litmushiring.com/api/v1
  tags:
  - Roles
  properties:
  - type: OpenAPI
    url: openapi/litmus-hiring-roles-api-openapi.yml
  - type: Documentation
    url: https://litmushiring.com/docs/rest
  - type: APIReference
    url: https://litmushiring.com/docs/rest
- aid: litmus-hiring:litmus-hiring-submissions-api
  name: Litmus Hiring Submissions API
  description: Candidate assessment submissions
  humanURL: https://litmushiring.com/docs/rest
  baseURL: https://www.litmushiring.com/api/v1
  tags:
  - Submissions
  properties:
  - type: OpenAPI
    url: openapi/litmus-hiring-submissions-api-openapi.yml
  - type: Documentation
    url: https://litmushiring.com/docs/rest
  - type: APIReference
    url: https://litmushiring.com/docs/rest
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-07-20'
  status: enriched
  artifacts_added: 17
  pass: local-v1

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