# Belharra Therapeutics

> Belharra Therapeutics is a privately held, next-generation chemoproteomics company in San Diego,
> California, building small molecule therapeutics against targets long considered undruggable. Its
> Searchlight platform is an unbiased chemoproteomics screening system designed to find novel binding
> pockets on high-value proteins across the proteome. Belharra runs no developer program and markets
> no product API. The only machine-readable surface reachable without credentials is the WordPress
> REST content API behind belharratx.com, which is catalogued and modelled here.

This file was GENERATED by API Evangelist on 2026-08-06 as part of an independent third-party
profile. Belharra Therapeutics does not publish an llms.txt — https://belharratx.com/llms.txt
returned 404. This is not a provider publication and must not be attributed to Belharra.

## Company

- [Belharra Therapeutics](https://belharratx.com/): Corporate site.
- [About](https://belharratx.com/about/): Company overview.
- [Our Story](https://belharratx.com/about/our-story/): Founding narrative — incubated by Versant Ventures out of chemoproteomics research at The Scripps Research Institute; CEO Jeff Jonker hired September 2021; public debut January 2023 with $130 million.
- [Our Values](https://belharratx.com/about/our-values/)
- [Our Team](https://belharratx.com/about/our-team/): Leadership, Founders, Board of Directors, Senior Advisors and the BTX Crew.
- [Platform](https://belharratx.com/our-approach/platform/): The Searchlight chemoproteomics platform.
- [Publications](https://belharratx.com/our-approach/publications/): Peer-reviewed science.
- [Science](https://belharratx.com/science/): Scientific approach and programs.
- [Partners](https://belharratx.com/partners/): Genentech (January 2023, $80 million upfront across oncology, immuno-oncology, autoimmune and neurodegenerative disease) and Sanofi (June 2024, immunology, up to $40 million upfront and near-term milestones).
- [Careers](https://belharratx.com/careers/)
- [Contact](https://belharratx.com/contact/): 3985 Sorrento Valley Boulevard, Suite C, San Diego, CA 92121. info@belharratx.com.

## News

- [Newsroom](https://belharratx.com/newsroom/)
- [Press Releases](https://belharratx.com/press-releases/): Four releases — the January 2023 debut, the January 2023 Genentech collaboration, the June 2024 Sanofi collaboration, and the January 2025 appointment of Sean Buchanan as chief scientific officer.
- [Company News](https://belharratx.com/company-news/): Twenty-one third-party coverage items.
- [Multimedia Library](https://belharratx.com/multimedia-library/): Video and the "Birth of a Biotech" podcast series.
- [RSS feed](https://belharratx.com/feed/)

## APIs

- [Belharra Therapeutics Content API](https://belharratx.com/wp-json): The anonymously readable WordPress REST content API. Base URL `https://belharratx.com/wp-json`. No credentials required, none accepted. 22 read operations catalogued across posts, pages, three custom post types, media, taxonomy, search and oEmbed.
- [WordPress REST Handbook](https://developer.wordpress.org/rest-api/): The upstream contract that defines the `wp/v2` namespace. Belharra publishes no API documentation of its own.

## Specs

- [OpenAPI 3.1](https://raw.githubusercontent.com/api-evangelist/belharra-therapeutics/refs/heads/main/openapi/belharra-therapeutics-content-openapi.yml): API Evangelist derivation of the live route index, restricted to operations verified to return data anonymously on 2026-08-06.
- [Overlay](https://raw.githubusercontent.com/api-evangelist/belharra-therapeutics/refs/heads/main/overlays/belharra-therapeutics-content-overlay.yaml): What API Evangelist added on top of the raw route index.
- [apis.json](https://raw.githubusercontent.com/api-evangelist/belharra-therapeutics/refs/heads/main/apis.yml)

## Artifacts

- [Authentication](https://raw.githubusercontent.com/api-evangelist/belharra-therapeutics/refs/heads/main/authentication/belharra-therapeutics-authentication.yml): No security schemes. The index advertises WordPress application passwords for site staff only.
- [Conventions](https://raw.githubusercontent.com/api-evangelist/belharra-therapeutics/refs/heads/main/conventions/belharra-therapeutics-conventions.yml): Pagination, field selection, filtering, caching, CORS. No idempotency contract.
- [Error catalog](https://raw.githubusercontent.com/api-evangelist/belharra-therapeutics/refs/heads/main/errors/belharra-therapeutics-problem-types.yml): The WordPress error envelope. Not RFC 9457.
- [Data model](https://raw.githubusercontent.com/api-evangelist/belharra-therapeutics/refs/heads/main/data-model/belharra-therapeutics-data-model.yml)
- [Lifecycle](https://raw.githubusercontent.com/api-evangelist/belharra-therapeutics/refs/heads/main/lifecycle/belharra-therapeutics-lifecycle.yml): No versioning policy, no deprecation policy, no SLA, no status page.
- [Conformance](https://raw.githubusercontent.com/api-evangelist/belharra-therapeutics/refs/heads/main/conformance/belharra-therapeutics-conformance.yml)
- [Well-known](https://raw.githubusercontent.com/api-evangelist/belharra-therapeutics/refs/heads/main/well-known/belharra-therapeutics-well-known.yml): Every RFC 8615 path returned 404.
- [Domain security](https://raw.githubusercontent.com/api-evangelist/belharra-therapeutics/refs/heads/main/security/belharra-therapeutics-domain-security.yml): TLS 1.3, no HSTS, no DNSSEC, no CAA, SPF present, DMARC p=quarantine.
- [Agent skills](https://raw.githubusercontent.com/api-evangelist/belharra-therapeutics/refs/heads/main/skills/_index.yml)

## For agents

Read this before calling the API:

- Base URL is `https://belharratx.com/wp-json`. Send no Authorization header — none is required and none will be accepted.
- Paginate with `page` and `per_page`. `per_page` maxes at 100 and the API returns HTTP 400 `rest_invalid_param` above that rather than clamping. Read totals from the `X-WP-Total` and `X-WP-TotalPages` response headers.
- Use `_fields` to request only the properties you need; responses are large because a full `acf` block and rendered HTML `content` are inlined on every record.
- Branch on the `code` field of an error, never the `message`. Errors are `{code, message, data:{status}}` — not RFC 9457 problem+json.
- Belharra's editorial content is split across five collections, not one. `/wp/v2/posts` holds only 10 items; the substantive archives are the custom post types `/wp/v2/press-release` (4), `/wp/v2/company-news` (21) and `/wp/v2/multimedia-file` (10). Querying only `/wp/v2/posts` will miss most of the company's published material.
- None of the three custom post types declares a taxonomy, so they cannot be filtered by category or tag — only by date window, slug, `menu_order` and `search`.
- Structured editorial data (outbound coverage URLs, video and podcast references) lives in the untyped `acf` object. Its field definitions are not publicly readable, so inspect it rather than assuming a shape.
- Responses are cached for 600 seconds at the edge and carry `x-robots-tag: noindex`.
- There is no rate-limit header. `robots.txt` advertises `Crawl-delay: 10`; honour it.
- `belharratherapeutics.com` is a parked lander that returns HTTP 200 for every path, including `/.well-known/agent-card.json` and `/openapi.json`. Those are soft-404s, not documents. Do not treat them as a Belharra surface.
- There is no MCP server, no agent card, no GraphQL endpoint and no llms.txt published by Belharra. The registered `wp-abilities/v1` capability registry returns 401 to anonymous callers.

## About this profile

- [API Evangelist](https://apievangelist.com/): This profile is independent and third-party. Belharra Therapeutics does not operate, host, endorse or support it.
- [Where our data comes from](https://apievangelist.com/about/where-our-data-comes-from)
- Corrections, re-scores and removal are free — open an issue on the repository or email info@apievangelist.com.