# Codesignal

**Canonical:** https://apis.io/providers/codesignal/  
**Website:** https://codesignal.com  
**APIs profiled:** 1

CodeSignal is a technical interview and skills-assessment platform used by companies to screen, interview, and upskill software engineers. Its developer surface includes a GraphQL API (companies, tests, test sessions, interviews, and interview templates), a versioned Learn REST API (OpenAPI 3.1) for organization members, skill sets, and learning progress, a webhook event API covering assessment, candidate, auditor, and live-interview workflows with HMAC-SHA256 signed deliveries, and an official remote MCP server that lets AI agents work with assessments, candidate sessions, and interviews. CodeSignal is backed by Menlo Ventures.

## Kin Score — 53.8 / 100 (developing)

Scored 2026-08-30 under rubric 0.17.2. Trend: flat (-0.6 from 54.4).

| Facet | Score |
|---|---|
| Discoverability | 75.9 |
| Contract Quality | 59.9 |
| Governance | 4.5 |
| Contract Governance | 4.5 |
| Operational Transparency | 36.8 |
| Developer Ergonomics | 47.0 |
| Commercial Clarity | 39.5 |
| Access Clarity | 39.5 |

Regulatory layer — **Education & Research**: 85.2 (matched via tags).

## Agent readiness — 40.6 (agent-native)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | no |
| Reversibility Documented | na |
| MCP Server | verified |
| Auth Clarity | negotiable |
| Idempotency | na |
| Error Semantics | documented |
| OpenAPI Examples | no |
| Rate Limit Signal | no |
| Event Surface Described | yes |
| Agent Skills | derived |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | na |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |

## Access

Self-serve signup — onboarding: self-serve, pricing: unknown, trial: no (confidence: medium).

## APIs (3)

- **CodeSignal GraphQL API** — Primary GraphQL API for companies, tests, test sessions, live interviews, and interview templates. Authenticated with an API key.
- **CodeSignal Webhook API** — Outbound webhook events across assessment, candidate, auditor, and live-interview workflows. Deliveries are signed with HMAC-SHA256.
- **Codesignal Organization API** — The Organization API from Codesignal — 5 operation(s) for organization.

## MCP servers (1)

- **Codesignal MCP Server** — Official remote MCP server that lets AI agents work with CodeSignal assessments, candidate test sessions, and live interviews.

## Security (4)

- **Codesignal Authentication** — oauth2 · 1 scheme
- **Codesignal Domain Security** — TLSv1.3 · HSTS · DMARC
- **Codesignal Vulnerability Disclosure** — security.txt · contact published
- **Codesignal Trust Center** — trust center published

## Tags

Company, Technical Interview, Skills Assessment, Hiring, Recruiting, Developer Skills, Assessment, Education, GraphQL, Webhook

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/codesignal/). Scores are computed from the provider's own public artifacts under a published rubric.