Flexus Biosciences

Flexus Biosciences was a South San Francisco / San Carlos, California biotechnology company founded in 2013 to develop small-molecule cancer immunotherapies, most notably inhibitors of the IDO/TDO immunosuppressive pathway (lead IDO1 program F001287). Backed by Kleiner Perkins and The Column Group, it was acquired by Bristol-Myers Squibb in February 2015 for up to roughly $1.25 billion (about $800M upfront) to expand BMS's immuno-oncology pipeline. The company no longer operates independently; its domain redirects to the Bristol-Myers Squibb acquisition announcement. It publishes no public developer portal, documentation, or API, so this profile carries company identity only and no technical API artifacts.

Flexus Biosciences is profiled on the APIs.io network. Tagged areas include Company, Healthcare, Biotechnology, Pharmaceuticals, and Immuno-Oncology.

📡 Source on GitHub

0 APIs

Company Healthcare Biotechnology Pharmaceuticals Immuno-Oncology Cancer Drug Discovery Acquired

Source (apis.yml)

aid: flexus-biosciences
deliveryModel:
  model: unknown
  open_source: false
  commercial: false
  callable_host: false
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - none
  generated: '2026-08-28'
  method: derived
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/flexus-biosciences.png
name: Flexus Biosciences
description: Flexus Biosciences was a South San Francisco / San Carlos, California biotechnology company founded in 2013 to
  develop small-molecule cancer immunotherapies, most notably inhibitors of the IDO/TDO immunosuppressive pathway (lead IDO1
  program F001287). Backed by Kleiner Perkins and The Column Group, it was acquired by Bristol-Myers Squibb in February 2015
  for up to roughly $1.25 billion (about $800M upfront) to expand BMS's immuno-oncology pipeline. The company no longer operates
  independently; its domain redirects to the Bristol-Myers Squibb acquisition announcement. It publishes no public developer
  portal, documentation, or API, so this profile carries company identity only and no technical API artifacts.
url: https://raw.githubusercontent.com/api-evangelist/flexus-biosciences/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- kleiner-perkins
x-tier: stub
x-tier-reason: portfolio-lead
x-status: acquired
x-acquired-by: bristol-myers-squibb
x-acquired-date: 2015-02
x-acquisition-announcement: https://news.bms.com/press-release/rd-news/bristol-myers-squibb-expand-its-immuno-oncology-pipeline-agreement-acquire-fle/
x-no-api-surface: true
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-19'
tags:
- Company
- Healthcare
- Biotechnology
- Pharmaceuticals
- Immuno-Oncology
- Cancer
- Drug Discovery
- Acquired
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence

Work with this as data

Every provider here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for providers

9 MCP tools reach this

find_providersBrowse and filter every provider in the catalog.
get_provider_artifactsEvery artifact this provider publishes, grouped by type.
get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

All 92 tools →

Call it yourself

curl for this page

This provider

curl "https://apis.io/api/v1/providers/flexus-biosciences"

All providers

curl "https://apis.io/api/v1/providers?limit=25"

Every operation they expose

curl "https://apis.io/api/v1/providers/flexus-biosciences/operations?limit=25"

How their score was established

curl "https://apis.io/api/v1/providers/flexus-biosciences/evidence"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.