Andreessenhorowitz

Andreessen Horowitz (a16z) is a leading venture capital firm investing in technology companies across various sectors including AI, bio‑health, consumer, crypto, enterprise, fintech, and infrastructure. The firm publishes insights, research, and resources for founders and developers, and maintains a robust online presence with sections for portfolio, team, focus areas, news, and a dedicated developer portal offering guides, tooling insights, and API resources.

Andreessenhorowitz is profiled on the APIs.io network. Tagged areas include Venture Capital, Technology, Investment, Artificial Intelligence, and Bio-Health.

Andreessenhorowitz’s developer surface includes API reference, getting-started guide, support, engineering blog, and 12 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

16.9/100 emerging ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-10-23 · rubric v0.25.0 · Show this score on your site →

0 APIs

Venture Capital Technology Investment Artificial IntelligenceBio-Health

Kin Score

Kin Score How this is scored →
scored 2026-10-23 · rubric v0.25.0

Composite quality — 16.9/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 4.5 / 17

Access Clarity 3.6 / 17

Operational Transparency 1.7 / 11

Contract Governance 0.0 / 10

Discoverability 4.3 / 9

Regulatory Posture 2.2 / 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

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

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.

Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

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/.

Show this score on your site.

It updates itself when the score changes. Paste this where you link to your API docs:

<a href="https://apis.io/providers/andreessenhorowitz/"><img src="https://apis.io/badge/andreessenhorowitz/card.svg" alt="Andreessenhorowitz on APIs.io — Kin Score by API Evangelist"></a>

Other styles, a README pill and a shields.io endpoint are on the badge page.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/andreessenhorowitz: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Security Posture 2

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Andreessenhorowitz Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Andreessenhorowitz Vulnerability Disclosure

security.txt · contact published

SECURITY

Resources

Get Started 1

Portal, sign-up, and the first successful call

GettingStarted

GettingStarted

Documentation 1

Reference material describing how the API behaves

APIReference

APIReference

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

WellKnown

WellKnown

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 4

Authentication, authorization, and security posture

Security

Security

SecurityTxt

SecurityTxt

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 3

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Leadership

Leadership

Source (apis.yml)

aid: andreessenhorowitz
name: Andreessenhorowitz
image: https://d1lamhf6l6yk6d.cloudfront.net/uploads/2026/03/a16z-Yoast-LI.png
description: Andreessen Horowitz (a16z) is a leading venture capital firm investing in technology companies across various
  sectors including AI, bio‑health, consumer, crypto, enterprise, fintech, and infrastructure. The firm publishes insights,
  research, and resources for founders and developers, and maintains a robust online presence with sections for portfolio,
  team, focus areas, news, and a dedicated developer portal offering guides, tooling insights, and API resources.
url: https://raw.githubusercontent.com/api-evangelist/andreessenhorowitz/refs/heads/main/apis.yml
x-type: company
x-source: harvest:secondary-market
x-tier: profiled
x-tier-reason: enrichment pass 2026-09-24 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-09-24'
modified: '2026-09-24'
tags:
- Venture Capital
- Technology
- Investment
- Artificial Intelligence
- Bio-Health
tags_raw:
- Venture Capital
- Technology
- Investment
- AI
- Bio-Health
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Security
  url: https://a16z.com/security-policy
- type: SecurityTxt
  url: well-known/andreessenhorowitz-security.txt
- type: WellKnown
  url: well-known/andreessenhorowitz-well-known.yml
- type: Hosts
  url: hosts/andreessenhorowitz-hosts.yml
- type: Vendors
  url: vendors/andreessenhorowitz-vendors.yml
- type: Leadership
  url: https://a16z.com/team/
- type: VulnerabilityDisclosure
  url: security/andreessenhorowitz-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/andreessenhorowitz-domain-security.yml
- type: Website
  url: https://a16z.com
- type: APIReference
  url: https://a16z.com/api
- type: GettingStarted
  url: https://a16z.com/about
- type: Support
  url: https://a16z.com/supporting-the-open-source-ai-community/
- type: Blog
  url: https://a16z.com/news-content
- type: GitHubOrganization
  url: https://github.com/a16z
- type: TermsOfService
  url: https://a16z.com/terms-of-use
- type: PrivacyPolicy
  url: https://a16z.com/privacy-policy
apis: []
x-coverage:
  state: unreadable
  reason: no-machine-readable-spec
  detail: Developer portal at https://a16z.com/enterprise/developer-tooling provides no OpenAPI or other machine‑readable
    contract.
  evidence:
  - url: https://a16z.com/api
    status: 301
  checked: 2026-09-24
x-enrichment:
  date: '2026-09-24'
  status: enriched
  artifacts_added: 7
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local

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/andreessenhorowitz"

All providers

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

Every operation they expose

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

How their score was established

curl "https://apis.io/api/v1/providers/andreessenhorowitz/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.