# ACELYRIN, Inc.

**Canonical:** https://apis.io/providers/acelyrin/  
**Website:** https://acelyrin.com/  
**APIs profiled:** 0

ACELYRIN, Inc. (Nasdaq: SLRN) was a late-stage clinical biopharmaceutical company headquartered in Agoura Hills, California, focused on accelerating the development and commercialization of medicines in immunology. Its lead candidates were izokibep, an anti-IL-17A small protein therapeutic, and lonigutamab, a humanized IgG1 monoclonal antibody against IGF-1R. It completed a $540M IPO in May 2023, and on May 21, 2025 it merged with a subsidiary of Alumis, Inc. and survives as a wholly owned Alumis subsidiary. Its corporate domain acelyrin.com now 301-redirects to alumis.com. The company is a drug developer, not a software vendor: it published no developer program, public API, SDK, webhook surface, or machine-readable specification, and no GitHub organization exists under the ACELYRIN name.

## Kin Score — 2.9 / 100 (minimal)

Scored 2026-09-06 under rubric 0.19.0.

| Facet | Score |
|---|---|
| Discoverability | 46.3 |
| 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**: 7.5 (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 |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |

## Security (1)

- **Acelyrin Domain Security** — TLSv1.3 · DMARC

## Tags

Company, Biopharmaceutical, Biotechnology, Pharmaceuticals, Immunology, Clinical Trials, Healthcare, Acquired

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