Web3 Foundation

Web3 Foundation is a Swiss nonprofit founded in 2017 by Gavin Wood that funds research and development teams building the foundation of a decentralized web (Web3). It stewards and supports the Polkadot and Kusama networks, operates a research hub and an education/wiki program, and historically ran the Web3 Foundation Grants Program (now discontinued) to seed open-source software and protocol research. It is a funding and research organization rather than a traditional API provider: it publishes no public REST/OpenAPI surface, but does maintain an RFC 9116 security.txt and a coordinated vulnerability-disclosure program.

Web3 Foundation is profiled on the APIs.io network. Tagged areas include Company, Infrastructure, Web3, Blockchain, and Polkadot.

Web3 Foundation’s developer surface includes documentation, engineering blog, and 8 more developer resources.

🌐 Visit website 📡 Source on GitHub

11.0/100 emerging ▬ flat Agent 0/100 human only Front door AI 1/6 silent Full breakdown ↓
scored 2026-09-25 · rubric v0.23.0

0 APIs

Company Infrastructure Web3 Blockchain PolkadotKusamaResearch Grants Decentralization Non-Profit

Kin Score

Kin Score How this is scored →
scored 2026-09-25 · rubric v0.23.0

Composite quality — 11.0/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 2.0 / 17

Access Clarity 1.8 / 17

Operational Transparency 1.5 / 11

Contract Governance 0.0 / 10

Discoverability 4.1 / 9

Regulatory Posture 2.4 / 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

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) 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/.

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/web3-foundation: 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.

Web3 Foundation Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Web3 Foundation Vulnerability Disclosure

security.txt · contact published

SECURITY

Resources

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

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

SecurityTxt

SecurityTxt

VulnerabilityDisclosure

VulnerabilityDisclosure

Security

Security

DomainSecurity

DomainSecurity

Commercial 1

Pricing, plans, and the legal terms of use

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

aid: web3-foundation
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/web3-foundation.png
name: Web3 Foundation
description: 'Web3 Foundation is a Swiss nonprofit founded in 2017 by Gavin Wood that funds research and development teams
  building the foundation of a decentralized web (Web3). It stewards and supports the Polkadot and Kusama networks, operates
  a research hub and an education/wiki program, and historically ran the Web3 Foundation Grants Program (now discontinued)
  to seed open-source software and protocol research. It is a funding and research organization rather than a traditional
  API provider: it publishes no public REST/OpenAPI surface, but does maintain an RFC 9116 security.txt and a coordinated
  vulnerability-disclosure program.'
url: https://raw.githubusercontent.com/api-evangelist/web3-foundation/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- polychain
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-21'
tags:
- Company
- Infrastructure
- Web3
- Blockchain
- Polkadot
- Kusama
- Research
- Grants
- Decentralization
- Non-Profit
tags_raw:
- Company
- Infrastructure
- Web3
- Blockchain
- Polkadot
- Kusama
- Research
- Grants
- Decentralization
- Nonprofit
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://web3.foundation
- type: Documentation
  url: https://education.web3.foundation
- type: Blog
  url: https://medium.com/web3foundation/
- type: GitHubOrganization
  url: https://github.com/w3f
- type: PrivacyPolicy
  url: https://web3.foundation/privacy-and-cookies/
- type: SecurityTxt
  url: well-known/web3-foundation-security.txt
- type: WellKnown
  url: well-known/web3-foundation-well-known.yml
- type: VulnerabilityDisclosure
  url: security/web3-foundation-vulnerability-disclosure.yml
- type: Security
  url: https://web3.foundation/security-report/
- type: DomainSecurity
  url: security/web3-foundation-domain-security.yml
x-enrichment:
  date: '2026-07-21'
  status: enriched
  artifacts_added: 4
  pass: local-v1

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