aid: trexbio
name: TRexBio
description: '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.'
image: https://trex.bio/wp-content/uploads/2025/10/cropped-Group-3.png
url: https://raw.githubusercontent.com/api-evangelist/trexbio/refs/heads/main/apis.yml
x-type: company
x-source: harvest:secondary-market
x-tier: profile
x-tier-reason: no-api-surface
specificationVersion: '0.23'
created: '2026-08-05'
modified: '2026-08-05'
tags:
- Company
- Biotechnology
- Life Sciences
- Pharmaceuticals
- Immunology
- Drug Discovery
- Regulatory T Cells
- Clinical Stage
- Computational Biology
- Therapeutics
- South San Francisco
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: MCPServer
  url: mcp/trexbio-mcp.yml
- type: Website
  url: https://trex.bio/
- type: About
  url: https://trex.bio/about-trex-bio/
- type: Platform
  url: https://trex.bio/deep-biology-platform/
- type: Pipeline
  url: https://trex.bio/pipeline/
- type: Blog
  url: https://trex.bio/news/
- type: BlogFeeds
  url: https://trex.bio/feed/
- type: Research
  url: https://trex.bio/news/
- type: Careers
  url: https://trex.bio/careers/
- type: Contact
  url: https://trex.bio/contact-us/
- type: TermsOfService
  url: https://trex.bio/terms-of-use/
- type: PrivacyPolicy
  url: https://trex.bio/privacy-policy/
- type: CookiePolicy
  url: https://trex.bio/cookie-policy/
- type: LinkedIn
  url: https://www.linkedin.com/company/trexbio-inc/
- type: GitHubOrganization
  url: https://github.com/trexbio
- type: Investors
  url: https://forgeglobal.com/trexbio_stock/
- type: LLMsTxt
  url: llms/trexbio-llms.txt
- type: WellKnown
  url: well-known/trexbio-well-known.yml
- type: DomainSecurity
  url: security/trexbio-domain-security.yml
x-enrichment:
  date: '2026-08-05'
  status: minimal
  artifacts_added: 6
  pass: local-v1
x-coverage:
  state: none
  reason: no-developer-program
  detail: >-
    TRexBio is a clinical-stage Treg biologics company with no developer program at all —
    trex.bio is a WordPress/WP Engine marketing site, and the only machine-readable things
    on it are stock CMS plumbing: the WordPress core REST API at /wp-json/ (342 routes, all
    of them WordPress and plugin routes), a Yoast-SEO-generated /llms.txt listing news posts
    and careers pages, and an undocumented WordPress MCP adapter at
    /wp-json/mcp/mcp-oauth-server that returns 401 mcp_unauthorized to anonymous tools/list
    — there is no product API, no /openapi.json, no docs host, and github.com/trexbio has
    zero public repositories.
  evidence:
  - url: https://trex.bio/openapi.json
    status: 404
  - url: https://trex.bio/graphql
    status: 404
  - url: https://trex.bio/.well-known/agent-card.json
    status: 404
  - url: https://trex.bio/wp-json/mcp/mcp-oauth-server
    status: 401
  - url: https://trex.bio/llms.txt
    status: 200
  - url: https://api.github.com/orgs/trexbio/repos
    status: 200
  checked: '2026-08-05'