Karat

Karat Inc. is a Seattle-based technical interviewing platform that conducts standardized software engineering interviews for enterprise hiring teams through its community of trained Interview Engineers. Karat exposes a GraphQL API, hosted per-customer at https://{subdomain}.karat.io/api/v1/graphql, that lets talent and ATS systems programmatically manage roles and groups, look up users, invite candidates into assessments, retrieve candidacy statuses, code-challenge and interview results, and bulk-update candidacy dispositions. The API uses Bearer token authentication, Relay-style cursor pagination, and ships an example Python SDK and a Postman collection. Karat is SOC 2 Type II certified and certified under the EU-US, UK-US and Swiss-US Data Privacy Frameworks.

Karat is listed with 1 API on the APIs.io network. Tagged areas include Company, Technical Interviewing, Hiring, Recruiting, and Talent Assessment.

Karat’s developer surface includes documentation, API reference, getting-started guide, engineering blog, support, authentication, sandbox, and 20 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

32.7/100 thin ▬ flat Agent 3/100 human only Front door AI 6/6 dominant saas Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →

1 API 2 Agent Skills

CompanyTechnical InterviewingHiring Recruiting Talent Assessment Engineering GraphQL

Kin Score

Kin Score How this is scored →
scored 2026-10-31 · rubric v0.25.0

Composite quality — 32.7/100 · thin

Contract Quality 0.0 / 21

Developer Ergonomics 11.6 / 17

Access Clarity 6.3 / 17

Operational Transparency 0.6 / 11

Contract Governance 1.9 / 10

Discoverability 5.6 / 9

Regulatory Posture 4.4 / 15

Agent readiness — 3/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 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 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 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

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
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)
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes

11 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
Access Clarity scores 36.8 — up to +12.6 composite points
Operational Transparency scores 5.3 — up to +12.3 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/karat/apis.yml: open an issue on github.com/api-evangelist/karat 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.

GraphQL

tagged — the provider's own APIs.json carries the standard as a tag; implementation not verified

APIs 1

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

Karat GraphQL API

Karat's GraphQL API for managing technical-interview hiring workflows: query candidacies, roles, groups and users; invite candidates into assessments; and bulk-update candidacy ...

Agent Skills 2

Packaged agent skills for driving this provider's APIs from an AI assistant.

Invite a candidate into a Karat assessment

AGENT SKILL

Sync and disposition candidacy statuses

AGENT SKILL

Security Posture 3

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

Karat Authentication

http · 1 scheme

SECURITY

Karat Domain Security

TLSv1.3 · DMARC

SECURITY

Karat Trust Center

SOC 2 Type II, EU-US Data Privacy Framework, UK-US Data Privacy Framework, Swiss-US Data Privacy Framework

SECURITY

Resources

Get Started 2

Portal, sign-up, and the first successful call

GettingStarted

GettingStarted

Sandbox

Sandbox

Documentation 3

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

GraphQL

GraphQL

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

WellKnown

WellKnown

X-MCPServerCandidate

X-MCPServerCandidate

AgentSkill

AgentSkill

LLMsTxt

LLMsTxt

Design & Contract 4

Pagination, idempotency, versioning, errors, and events

Conventions

DataModel

Conformance

Lifecycle

Build 4

SDKs, sample code, and the tooling you integrate with

Postman

Postman

GitHubOrganization

GitHubOrganization

SDKs

SDKs

Packages

Packages

Access & Security 4

Authentication, authorization, and security posture

Compliance

Authentication

TrustCenter

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 3

The organization behind the API

BlogRSS

BlogRSS

Website

Website

Blog

Blog

Source (apis.yml)

aid: karat
name: Karat
description: Karat Inc. is a Seattle-based technical interviewing platform that conducts standardized software engineering
  interviews for enterprise hiring teams through its community of trained Interview Engineers. Karat exposes a GraphQL API,
  hosted per-customer at https://{subdomain}.karat.io/api/v1/graphql, that lets talent and ATS systems programmatically manage
  roles and groups, look up users, invite candidates into assessments, retrieve candidacy statuses, code-challenge and interview
  results, and bulk-update candidacy dispositions. The API uses Bearer token authentication, Relay-style cursor pagination,
  and ships an example Python SDK and a Postman collection. Karat is SOC 2 Type II certified and certified under the EU-US,
  UK-US and Swiss-US Data Privacy Frameworks.
url: https://raw.githubusercontent.com/api-evangelist/karat/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- norwest-venture-partners
- union-square-ventures
x-tier: enriched
x-tier-reason: portfolio-lead
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - security
  - sandbox
  generated: '2026-09-03'
  method: derived
image: https://karat.com/wp-content/themes/karat/assets/img/png/logo.png
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-10-06'
tags:
- Company
- Technical Interviewing
- Hiring
- Recruiting
- Talent Assessment
- Engineering
- GraphQL
tags_raw:
- Company
- Technical Interviewing
- Hiring
- Recruiting
- Talent Assessment
- Engineering
- GraphQL
- API
apis:
- name: Karat GraphQL API
  description: 'Karat''s GraphQL API for managing technical-interview hiring workflows: query candidacies, roles, groups and
    users; invite candidates into assessments; and bulk-update candidacy dispositions. Hosted per-customer on a tenant subdomain.'
  humanURL: https://karat.slab.com/posts/karat-api-documentation-dezzam7y
  baseURL: https://{subdomain}.karat.io/api/v1/graphql
  tags:
  - GraphQL
  - Hiring
  - Interviewing
  properties:
  - type: Documentation
    url: https://karat.slab.com/posts/karat-api-documentation-dezzam7y
  - type: APIReference
    url: https://karat.slab.com/posts/karat-api-overview-6l4gprc3
  - type: GraphQL
    url: https://github.com/karat/api-docs
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- url: https://karat.com/feed/
  type: BlogRSS
- type: Website
  url: https://karat.com
- type: Documentation
  url: https://karat.slab.com/posts/karat-api-documentation-dezzam7y
- type: APIReference
  url: https://karat.slab.com/posts/karat-api-overview-6l4gprc3
- type: GettingStarted
  url: https://github.com/karat/api-sdk#installation
- type: GraphQL
  url: https://github.com/karat/api-docs
- type: Postman
  url: https://github.com/karat/api-docs/tree/main/Postman
- type: GitHubOrganization
  url: https://github.com/karat
- type: Blog
  url: https://karat.com/blog/
- type: Support
  url: https://karat.com/contact-us/
- type: TermsOfService
  url: https://karat.com/terms-of-service/
- type: PrivacyPolicy
  url: https://karat.com/privacy/
- type: Compliance
  url: https://karat.com/customer-faq/
- type: SDKs
  url: packages/karat-packages.yml
- type: Packages
  url: packages/karat-packages.yml
- type: Authentication
  url: authentication/karat-authentication.yml
- type: Conventions
  url: conventions/karat-conventions.yml
- type: DataModel
  url: data-model/karat-data-model.yml
- type: Conformance
  url: conformance/karat-conformance.yml
- type: Lifecycle
  url: lifecycle/karat-lifecycle.yml
- type: Sandbox
  url: sandbox/karat-sandbox.yml
- type: WellKnown
  url: well-known/karat-well-known.yml
- type: TrustCenter
  url: security/karat-trust-center.yml
- type: DomainSecurity
  url: security/karat-domain-security.yml
- type: X-MCPServerCandidate
  url: mcp/karat-mcp.yml
  note: 'Renamed from MCPServer 2026-09-03 (roadmap#247): the manifest self-describes as status: candidate — a tool list derived
    from the published API contracts, not an existing server. The scorer already read the manifest and reported mcp_server
    correctly; the MCPServer type was crediting the artifact-type surfaces with a server that does not exist.'
- type: AgentSkill
  url: skills/_index.yml
- type: LLMsTxt
  url: llms/karat-llms.txt
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence

Karat API — frequently asked questions

Does Karat have an API?

Yes. APIs.io lists 1 API from Karat, including Karat GraphQL API.

How do I authenticate with the Karat API?

Karat uses bearer-token authentication (http · 1 scheme). The details are profiled on APIs.io as Karat Authentication.

Is the Karat API ready for AI agents?

Karat has a Kin Score of 32.7 out of 100 (thin) and an Agent Readiness score of 3.4 (human-only), scored by API Evangelist on 2026-10-31.

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