# Halda Therapeutics

**Canonical:** https://apis.io/providers/halda-therapeutics/  
**APIs profiled:** 0

Halda Therapeutics was a clinical-stage biotechnology company and Yale University spinout developing oral, targeted cancer therapies built on its proprietary RIPTAC (Regulated Induced Proximity TArgeting Chimera) platform, a novel "hold and kill" modality for the precision treatment of solid tumors. Its lead program, HLD-0915, is a first-in-class oral RIPTAC therapeutic in development for metastatic castration-resistant prostate cancer (mCRPC), with earlier-stage candidates spanning breast, lung, and other tumor types. Backed by investors including Canaan Partners, Halda was acquired by Johnson & Johnson in 2025 for approximately $3.05 billion in cash, with its platform folded into Johnson & Johnson Innovative Medicine's oncology pipeline. As a therapeutics developer, Halda operated no public developer platform, API, or documentation surface; this profile is maintained in the API Evangelist network as a company identity and portfolio-graph record rather than an API producer.

## Kin Score — 2.2 / 100 (minimal)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 2.2).

| Facet | Score |
|---|---|
| Discoverability | 50.0 |
| Contract Quality | 0.0 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 0.0 |
| Developer Ergonomics | 0.0 |
| Commercial Clarity | 0.0 |
| Access Clarity | 0.0 |

Regulatory layer — **Health**: 0.0 (matched via tags).

## Agent readiness — 0.0 (human-only)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | no |
| Idempotency | no |
| Error Semantics | no |
| 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

Unknown — onboarding: unknown, pricing: unknown, trial: no (confidence: low).

## Tags

Company, Biotechnology, Pharmaceuticals, Oncology, Cancer Therapeutics, Prostate Cancer, Drug Discovery, Life Sciences, Yale Spinout

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