# TRexBio

**Canonical:** https://apis.io/providers/trexbio/  
**Website:** https://trex.bio/  
**APIs profiled:** 0

TRexBio, Inc. is a clinical-stage biotechnology company headquartered at 681 Gateway Blvd in South San Francisco, California, founded in 2018 and seed funded by SV Health Investors, that discovers and develops immunoregulatory biologics based on tissue regulatory T cell (Treg) biology. Its Deep Biology Platform combines human tissue samples, computational biology and immunobiology expertise to map how tissue Tregs behave in disease and to identify and characterize novel targets for inflammatory, autoimmune and other immune-mediated conditions. Disclosed programs include TRB-061, the CD30 agonist TRB-071, TRB-081, and the Lilly-partnered TRB-051, with Phase 1 trials expected to initiate in 2027. The company announced an $84 million Series B in November 2024 and closed a further $50 million financing in January 2026; investors include Eli Lilly and Company, Pfizer Ventures, Johnson & Johnson, SV Health Investors and Polaris Partners. TRexBio publishes no developer program, API documentation, SDK or machine-readable API contract. trex.bio is a WordPress marketing site whose only machine-readable surfaces are the WordPress core REST API, a Yoast-generated llms.txt, and an OAuth-protected WordPress MCP adapter endpoint — CMS infrastructure rather than a product API.

## Kin Score — 13.5 / 100 (emerging)

Scored 2026-08-17 under rubric 0.11.0. Trend: flat (+0.0 from 13.5).

| Facet | Score |
|---|---|
| Discoverability | 57.4 |
| Contract Quality | 0.0 |
| Governance | 0.0 |
| Operational Transparency | 5.3 |
| Developer Ergonomics | 10.9 |
| Commercial Clarity | 21.1 |

Regulatory layer — **Health**: 17.5 (matched via tags).

## Agent readiness — 10.8 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| MCP Server | yes |
| 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 |

## MCP servers (1)

- **trexbio-mcp.yml**

## Security (1)

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

## Tags

Company, Biotechnology, Life Sciences, Pharmaceuticals, Immunology, Drug Discovery, Regulatory T Cells, Clinical Stage, Computational Biology, Therapeutics, South San Francisco

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