# Sionna Therapeutics

**Canonical:** https://apis.io/providers/sionna-therapeutics/  
**Website:** https://www.sionnatx.com/  
**APIs profiled:** 0

Sionna Therapeutics, Inc. (Nasdaq: SION) is a clinical-stage biopharmaceutical company headquartered at 21 Hickory Drive, Waltham, Massachusetts, working to revolutionize the treatment paradigm for cystic fibrosis (CF) by developing novel small molecules that normalize the function of the cystic fibrosis transmembrane conductance regulator (CFTR) protein. Building on more than a decade of its co-founders' research, the company advances a pipeline of first-in-class stabilizers of CFTR's nucleotide-binding domain 1 (NBD1) — the domain that carries F508del, the most common CF-causing mutation — including SION-719 and SION-451, alongside a portfolio of complementary CFTR modulators such as SION-2222 (galicaftor) and SION-109 designed to work synergistically with the NBD1 stabilizers. Sionna operates purely as a drug-development organization: its public web presence is a nine-page WordPress marketing site covering science, pipeline, careers, contact and legal material, plus a hosted investor-relations portal. It publishes no developer program, public API, SDK, webhook surface, or machine-readable specification of any kind.

## Kin Score — 9.0 / 100 (minimal)

Scored 2026-09-02 under rubric 0.18.0. Trend: flat (+0.0 from 9.0).

| 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 | 21.1 |
| Access Clarity | 21.1 |

Regulatory layer — **Health**: 17.5 (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 |

## Access

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

## Security (1)

- **Sionna Therapeutics Domain Security** — TLSv1.3 · DMARC

## Tags

Company, Biotechnology, Pharmaceuticals, Life Sciences, Clinical Trials, Drug Development, Rare Disease, Cystic Fibrosis, Small Molecule

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