# CytomX Therapeutics

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

CytomX Therapeutics is a clinical-stage, oncology-focused biopharmaceutical company based in South San Francisco, California, pioneering a novel class of masked, conditionally activated biologic therapeutics built on its proprietary Probody platform. The Probody technology is engineered to remain inactive in healthy tissue and to become selectively unmasked and activated within the tumor microenvironment, with the goal of producing more potent, less toxic cancer medicines. The company's pipeline spans antibody-drug conjugates (ADCs), T-cell engaging bispecific antibodies, and immunotherapies, advanced both internally and through partnerships with major pharmaceutical companies. CytomX is a publicly traded company (Nasdaq CTMX). This API Evangelist profile was surfaced as a portfolio company of Canaan Partners; as a biopharmaceutical research organization CytomX does not publish a public developer API, so this profile carries company identity and domain-security posture rather than API artifacts.

## Kin Score — 4.5 / 100 (minimal)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 4.5).

| Facet | Score |
|---|---|
| Discoverability | 50.0 |
| Contract Quality | 0.0 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 0.0 |
| Developer Ergonomics | 6.0 |
| 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 |

## Access

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

## Security (1)

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

## Tags

Company, Biotechnology, Pharmaceuticals, Oncology, Cancer Therapeutics, Clinical Stage, Life Sciences

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