Sidewinder Therapeutics

Sidewinder Therapeutics is a clinical-stage biopharmaceutical company founded in 2023 and headquartered in San Diego, developing a new generation of precision bispecific antibody-drug conjugates (ADCs) for the treatment of solid tumors. Its engineered biologics bind two complexed targets simultaneously to increase tumor specificity, driving internalization of the antibody-receptor complex and its cytotoxic payload, with the goal of expanding the therapeutic window for hard-to-treat cancers such as colorectal, lung, and head-and-neck squamous cell carcinomas. The company raised an oversubscribed $137M Series B in 2026 (co-led by Frazier Life Sciences and Novartis Venture Fund, with DCVC Bio, OrbiMed, and others) and is advancing its bispecific ADC programs toward clinical development. Sidewinder is a biopharma research company and publishes no public developer or API surface.

Sidewinder Therapeutics is profiled on the APIs.io network. Tagged areas include Company, Biotechnology, Biopharmaceutical, Oncology, and Antibody-Drug Conjugates.

Sidewinder Therapeutics’ developer surface includes engineering blog, support, and 4 more developer resources.

🌐 Visit website 📡 Source on GitHub

10.5/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-08-20 · rubric v0.12.0

0 APIs

Company Biotechnology Biopharmaceutical Oncology Antibody-Drug Conjugates Cancer Therapeutics Life Sciences Drug Development

Kin Score

Kin Score How this is scored →
scored 2026-08-20 · rubric v0.12.0

Composite quality — 10.5/100 · minimal

Contract Quality 0.0 / 21

Developer Ergonomics 1.2 / 17

Access Clarity 3.6 / 17

Operational Transparency 0.0 / 11

Contract Governance 0.0 / 10

Discoverability 4.3 / 9

Regulatory Posture 2.6 / 15

Agent readiness — 0/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Regulatory Posture applies to this provider. Its tags matched the Health regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/sidewinder-therapeutics: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 2

Pricing, plans, and the legal terms of use

PrivacyPolicy

PrivacyPolicy

TermsOfService

TermsOfService

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

aid: sidewinder-therapeutics
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/sidewinder-therapeutics.png
name: Sidewinder Therapeutics
description: Sidewinder Therapeutics is a clinical-stage biopharmaceutical company founded in 2023 and headquartered in San
  Diego, developing a new generation of precision bispecific antibody-drug conjugates (ADCs) for the treatment of solid tumors.
  Its engineered biologics bind two complexed targets simultaneously to increase tumor specificity, driving internalization
  of the antibody-receptor complex and its cytotoxic payload, with the goal of expanding the therapeutic window for hard-to-treat
  cancers such as colorectal, lung, and head-and-neck squamous cell carcinomas. The company raised an oversubscribed $137M
  Series B in 2026 (co-led by Frazier Life Sciences and Novartis Venture Fund, with DCVC Bio, OrbiMed, and others) and is
  advancing its bispecific ADC programs toward clinical development. Sidewinder is a biopharma research company and publishes
  no public developer or API surface.
url: https://raw.githubusercontent.com/api-evangelist/sidewinder-therapeutics/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- dcvc
x-tier: stub
x-tier-reason: portfolio-lead
x-enrichment:
  date: '2026-07-21'
  status: minimal
  artifacts_added: 1
  pass: local-v1
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-21'
tags:
- Company
- Biotechnology
- Biopharmaceutical
- Oncology
- Antibody-Drug Conjugates
- Cancer Therapeutics
- Life Sciences
- Drug Development
apis: []
common:
- type: DomainSecurity
  url: security/sidewinder-therapeutics-domain-security.yml
- type: Website
  url: https://sidewinderbio.com/
- type: PrivacyPolicy
  url: https://sidewinderbio.com/privacy-notice
- type: TermsOfService
  url: https://sidewinderbio.com/terms-of-use
- type: Blog
  url: https://sidewinderbio.com/#news
- type: Support
  url: https://sidewinderbio.com/#contact
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io