# MBrace Therapeutics > MBrace Therapeutics is a privately held, clinical-stage biopharmaceutical company developing > antibody-drug conjugates (ADCs) against novel oncology targets, discovered with its SPARTA in vivo > antibody selection and target discovery platform. It runs no developer program and sells no API. > The only machine-readable surface reachable without credentials is the WordPress REST content API > behind mbracetrx.com, catalogued here by API Evangelist. generated: 2026-08-25 method: generated source: apis.yml + openapi/ (9 documents, 28 operations) + live probes of https://mbracetrx.com 2026-08-25 note: MBrace Therapeutics does not publish an llms.txt. https://mbracetrx.com/llms.txt returned 404 on 2026-08-25. This file is generated by API Evangelist from the artifacts in this repository. ## What this company is MBrace Therapeutics was co-founded by Renata Pasqualini, Ph.D. and Isan Chen, MD. Its lead candidate MBRC-101 is an anti-EphA5 monomethyl auristatin E (MMAE) antibody-drug conjugate in a multi-centre, open-label Phase 1/1b dose-finding, safety and pharmacokinetic study in advanced refractory solid tumours. MBRC-201 is in Phase 2, MBRC-301 is in IND-enabling studies against solid tumours, and MBRC-401 is in discovery. The company emerged from stealth in November 2023 with an $85 million Series B led by TPG through TPG Life Sciences Innovations, alongside Avidity Partners, Blue Owl Capital, Venrock and Alta Partners, for $110 million raised in total. MBRC-101 was named Most Promising Clinical Candidate at the 11th Annual World ADC Awards. ## What the API is, and what it is not It is NOT a product. There is no developer portal, no API reference, no documentation, no SDK, no CLI, no sandbox, no pricing, no signup, no status page, no changelog, no GitHub organisation and no MCP server. The surface below is the WordPress REST API of the company's marketing site, reachable anonymously at https://mbracetrx.com/wp-json. MBrace has made no statement that it exists and commits to nothing about it. It is worth cataloguing for one reason: MBrace registered five custom post types of its own, so the company's board, executive committee, founders, named investors and scientific advisory board are published as structured JSON rather than only as rendered HTML. Base URL: https://mbracetrx.com/wp-json Authentication: none required. All 28 catalogued operations are anonymous GETs. Errors: WordPress envelope {code, message, data:{status}} — NOT RFC 9457 problem+json. Pagination: page / per_page (max 100) / offset, with X-WP-Total and X-WP-TotalPages headers. Rate limits: none published and no rate-limit headers returned. robots.txt advertises Crawl-delay: 10. Write access: none anonymously. Every write route returns 401. ## APIs - [News API](openapi/mbrace-therapeutics-news-openapi.yml): Press releases, conference presentations and publications. 8 posts, most recent 2025-07-04. - [People API](openapi/mbrace-therapeutics-people-openapi.yml): Board members (8), executive committee (8), founders (2), investors (5), scientific advisory board (5). - [Pages API](openapi/mbrace-therapeutics-pages-openapi.yml): 12 corporate pages including Pipeline, Discovery Platform and the MBRC-101/MBRC-201 programme pages. - [Media API](openapi/mbrace-therapeutics-media-openapi.yml): 224 attachments — corporate logo, leadership headshots, document assets. - [Search API](openapi/mbrace-therapeutics-search-openapi.yml): Cross-content search over 76 published objects. The best entry point. - [Taxonomy API](openapi/mbrace-therapeutics-taxonomy-openapi.yml): 4 categories shared across posts and the people types. The tag taxonomy is empty. - [Discovery API](openapi/mbrace-therapeutics-discovery-openapi.yml): The route index, post types, taxonomies and statuses. - [Users API](openapi/mbrace-therapeutics-users-openapi.yml): 3 content authors, display fields only. - [oEmbed API](openapi/mbrace-therapeutics-oembed-openapi.yml): oEmbed 1.0 for any mbracetrx.com URL. ## Agent Skills - [Track the news archive](skills/mbrace-therapeutics-track-news-archive.md) - [Harvest the company graph](skills/mbrace-therapeutics-harvest-company-graph.md) - [Search and resolve](skills/mbrace-therapeutics-search-and-resolve.md) ## Artifacts - [Authentication](authentication/mbrace-therapeutics-authentication.yml) - [Conventions](conventions/mbrace-therapeutics-conventions.yml) - [Error catalog](errors/mbrace-therapeutics-problem-types.yml) - [Data model](data-model/mbrace-therapeutics-data-model.yml) - [Conformance](conformance/mbrace-therapeutics-conformance.yml) - [Lifecycle](lifecycle/mbrace-therapeutics-lifecycle.yml) - [Rate limits](rate-limits/mbrace-therapeutics-rate-limits.yml) - [Plans and pricing](plans/mbrace-therapeutics-plans-pricing.yml) - [Packages](packages/mbrace-therapeutics-packages.yml) - [MCP](mcp/mbrace-therapeutics-mcp.yml) - [Well-known probe](well-known/mbrace-therapeutics-well-known.yml) - [Domain security](security/mbrace-therapeutics-domain-security.yml) ## Company links - [Website](https://mbracetrx.com/) - [About Us](https://mbracetrx.com/about-us/) - [Pipeline](https://mbracetrx.com/pipeline/) - [Discovery Platform](https://mbracetrx.com/discovery-platform/) - [MBRC-101 clinical program](https://mbracetrx.com/clinical-program-mbrc-101/) - [MBRC-201 clinical program](https://mbracetrx.com/clinical-program-mbrc-201/) - [Expanded Access Statement](https://mbracetrx.com/expanded-access-statement/) - [News](https://mbracetrx.com/news/) - [Contact](https://mbracetrx.com/contact/) - [Terms of Use](https://mbracetrx.com/terms-of-use/) - [Privacy Policy](https://mbracetrx.com/privacy-policy/) ## Measured absences These were probed on 2026-08-25 and returned 404 or did not resolve. They are recorded so a reader does not go looking twice. - /llms.txt, /openapi.json, /openapi.yaml, /swagger.json, /api-docs, /docs, /redoc, /graphql, /apis.json — all 404 - /.well-known/security.txt, /openid-configuration, /oauth-authorization-server, /oauth-protected-resource, /api-catalog, /ai-plugin.json, /agent-card.json, /agent.json — all 404 - api., developer., docs., dev., portal., status., app., data., mcp..mbracetrx.com — all NXDOMAIN - github.com/mbracetrx, /mbrace-therapeutics, /mbracetx — all 404; GitHub search returned zero results - No MCP server at /mcp, /wp-json/mcp/v1 or /sse — all 404