# Bullhorn

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

Bullhorn is a cloud-based CRM and applicant tracking system (ATS) built for the staffing and recruitment industry. Its REST API exposes the Bullhorn Staffing Object Model — Candidate, JobOrder, JobSubmission, Placement, ClientCorporation, ClientContact, Lead, Opportunity, Note, Appointment and related entities — with full CRUD, DB-backed query, Lucene full-text search, mass update, resume parsing, and file-attachment operations. Authentication is OAuth 2.0 (authorization_code + refresh_token) exchanged via a /login call for a short-lived BhRestToken session; API traffic routes to data-center-specific hosts discovered through the loginInfo endpoint. Bullhorn also publishes an official Java SDK, a Passport.js OAuth strategy, the Novo Elements Angular UI component library, and a CSV Data Loader CLI.

## Kin Score — 36.6 / 100 (thin)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 36.6).

| Facet | Score |
|---|---|
| Discoverability | 75.9 |
| Contract Quality | 0.0 |
| Governance | 18.2 |
| Contract Governance | 18.2 |
| Operational Transparency | 18.4 |
| Developer Ergonomics | 61.9 |
| Commercial Clarity | 60.5 |
| Access Clarity | 60.5 |

## Agent readiness — 12.0 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | yes |
| Idempotency | no |
| Error Semantics | documented |
| OpenAPI Examples | no |
| Rate Limit Signal | no |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

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

## APIs (1)

- **Bullhorn REST API** — REST API over the Bullhorn Staffing Object Model — CRUD, query, Lucene search, mass update, resume parsing, and file attachments across Candidate, JobOrder, Placement, ClientCor...

## Security (3)

- **Bullhorn Authentication** — oauth2/session-token · 2 schemes
- **Bullhorn Domain Security** — TLSv1.3 · HSTS · DMARC
- **Bullhorn Trust Center** — SOC 2, GDPR

## Tags

Company, Staffing, Recruitment, Applicant Tracking, ATS, CRM, Human Resources, REST, Authentication

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