CodeSignal, Inc.

CodeSignal is a technical skills assessment and interview platform used by employers to evaluate, hire, and develop engineering talent through skills assessments, an AI Interviewer, live technical interviews, and skills development and intelligence products. For programmatic integration CodeSignal publishes a developer surface at developer.codesignal.com built around a GraphQL API (https://app.codesignal.com/graphql) authenticated with a Bearer API key, a Webhook API that delivers HMAC-SHA256-signed JSON event notifications for assessments, test sessions, and live interviews, and a Learn API. The platform integrates with major ATS, LMS, HCM, and SSO/identity providers and maintains SOC 2 Type II and ISO 27001 compliance.

CodeSignal, Inc. publishes 1 API on the APIs.io network. Tagged areas include Company, Business Applications, Technical Assessment, Developer Hiring, and Skills Assessment.

The CodeSignal, Inc. catalog on APIs.io includes 1 event-driven AsyncAPI specification.

CodeSignal, Inc.’s developer surface includes documentation, API reference, pricing, signup flow, engineering blog, support, authentication, and 17 more developer resources.

🌐 Visit website 📡 Source on GitHub

39.7/100 thin ▬ flat Agent 22/100 agent aware Full breakdown ↓
scored 2026-07-27 · rubric v0.5

AccessSelf serve

1 APIs

CompanyBusiness ApplicationsTechnical AssessmentDeveloper HiringSkills AssessmentTechnical InterviewsGraphQLWebhooksTalent

Kin Score

Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5

Composite quality — 39.7/100 · thin

Contract Quality 5.7 / 25

Developer Ergonomics 8.3 / 20

Commercial Clarity 12.1 / 20

Operational Transparency 4.4 / 13

Governance 0.0 / 12

Discoverability 9.3 / 10

Agent readiness — 22/100 · agent aware

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 15

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 6 / 6

Agent Skills 0 / 5

Well-Known Catalog 4 / 4

Consent & Bot Identity 3 / 3

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/codesignal-inc: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 1

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

Get Started 2

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

SignUp

SignUp

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

WellKnown

WellKnown

LLMsTxt

LLMsTxt

Design & Contract 4

Pagination, idempotency, versioning, errors, and events

Conventions

Lifecycle

Conformance

Webhooks

Access & Security 7

Authentication, authorization, and security posture

Compliance

TrustCenter

Authentication

SecurityTxt

DomainSecurity

VulnerabilityDisclosure

VulnerabilityDisclosure

Security

Security

Scroll for all 7

Operate 2

Status, limits, changes, and where to get help

Support

Support

StatusPage

StatusPage

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

aid: codesignal-inc
name: CodeSignal, Inc.
description: CodeSignal is a technical skills assessment and interview platform used by employers to evaluate, hire, and develop
  engineering talent through skills assessments, an AI Interviewer, live technical interviews, and skills development and
  intelligence products. For programmatic integration CodeSignal publishes a developer surface at developer.codesignal.com
  built around a GraphQL API (https://app.codesignal.com/graphql) authenticated with a Bearer API key, a Webhook API that
  delivers HMAC-SHA256-signed JSON event notifications for assessments, test sessions, and live interviews, and a Learn API.
  The platform integrates with major ATS, LMS, HCM, and SSO/identity providers and maintains SOC 2 Type II and ISO 27001 compliance.
url: https://raw.githubusercontent.com/api-evangelist/codesignal-inc/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- index-ventures
x-tier: stub
x-tier-reason: portfolio-lead
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
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-18'
image: https://codesignal.com/wp-content/uploads/2023/01/codesignal-logo.png
tags:
- Company
- Business Applications
- Technical Assessment
- Developer Hiring
- Skills Assessment
- Technical Interviews
- GraphQL
- Webhooks
- Talent
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
apis:
- name: CodeSignal GraphQL API
  description: 'CodeSignal''s primary programmatic surface: a GraphQL API for reading assessments and company test sessions
    and running mutations, authenticated with a Bearer API key. Read operations live under RootQuery and writes under RootMutation;
    per-operation rate limits apply (commonly 5-10 req/s) with a max query cost of 10,000 and max depth of 10.'
  humanURL: https://developer.codesignal.com/graphql
  baseURL: https://app.codesignal.com/graphql
  properties:
  - type: Documentation
    url: https://developer.codesignal.com/graphql
  - type: Authentication
    url: authentication/codesignal-inc-authentication.yml
  - type: Conventions
    url: conventions/codesignal-inc-conventions.yml
common:
- type: Website
  url: https://codesignal.com/
- type: DeveloperPortal
  url: https://developer.codesignal.com/
- type: Documentation
  url: https://developer.codesignal.com/
- type: APIReference
  url: https://developer.codesignal.com/graphql
- type: Integrations
  url: https://codesignal.com/integrations/
- type: Pricing
  url: https://codesignal.com/pricing/
- type: SignUp
  url: https://identity.codesignal.com/auth/login/
- type: TermsOfService
  url: https://codesignal.com/terms/
- type: PrivacyPolicy
  url: https://codesignal.com/privacy/
- type: Blog
  url: https://codesignal.com/blog/
- type: Support
  url: https://support.codesignal.com/hc/en-us
- type: StatusPage
  url: https://status.codesignal.com/
- type: Compliance
  url: https://codesignal.com/compliance-trust/
- type: TrustCenter
  url: https://trust.codesignal.com/
- type: Authentication
  url: authentication/codesignal-inc-authentication.yml
- type: Conventions
  url: conventions/codesignal-inc-conventions.yml
- type: Lifecycle
  url: lifecycle/codesignal-inc-lifecycle.yml
- type: Conformance
  url: conformance/codesignal-inc-conformance.yml
- type: Webhooks
  url: asyncapi/codesignal-inc-webhooks.yml
- type: WellKnown
  url: well-known/codesignal-inc-well-known.yml
- type: SecurityTxt
  url: well-known/codesignal-inc-security.txt
- type: LLMsTxt
  url: llms/codesignal-inc-llms.txt
- type: DomainSecurity
  url: security/codesignal-inc-domain-security.yml
- type: VulnerabilityDisclosure
  url: security/codesignal-inc-vulnerability-disclosure.yml
- type: Security
  url: https://codesignal.com/security/disclosure-policy
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence

CodeSignal, Inc.

Kin Score

APIs 1

CodeSignal GraphQL API

Event Specifications 1

Codesignal Inc Webhooks

Security Posture 4

Codesignal Inc Authentication

Codesignal Inc Domain Security

Codesignal Inc Vulnerability Disclosure

Codesignal Inc Trust Center

Resources