Foundation

Foundation is a creator-focused NFT marketplace built on Ethereum that enables digital artists to mint, showcase, and auction unique digital artworks. The platform provides a GraphQL API via The Graph protocol for querying artwork, auctions, bids, collector profiles, offers, buy-now listings, and edition drop data. Foundation smart contracts remain live on Ethereum mainnet, and the subgraph continues to index on-chain activity for programmatic access.

Foundation is listed with 2 APIs on the APIs.io network. Tagged areas include NFT, Digital Art, Marketplace, Ethereum, and Web3.

Foundation’s developer surface includes engineering blog and 12 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

22.8/100 emerging ▬ flat Agent 16/100 agent aware Front door AI 1/6 silent Heartbeat 0/100 dormant saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessFreemium

2 APIs

NFT Digital Art Marketplace Ethereum Web3 Blockchain Creators Auctions Collectors

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 22.8/100 · emerging

Contract Quality 7.5 / 21

Developer Ergonomics 1.6 / 17

Access Clarity 1.3 / 17

Operational Transparency 3.8 / 11

Contract Governance 0.0 / 10

Discoverability 5.6 / 9

Regulatory Posture 1.8 / 15

Agent readiness — 16/100 · agent aware

Machine-Readable Contract 18 / 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 7 / 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

MCP Tool Quality 6 / 6

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/.

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

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Agent readiness — checks not met, largest first (exact, from this profile):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
Machine-Readable Auth +10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey)
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0

11 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Access Clarity scores 7.9 — up to +18.4 composite points
Developer Ergonomics scores 9.5 — up to +18.1 composite points
Contract Quality scores 35.1 — up to +16.2 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

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 the provider profile at artifacts.apis.io/foundation/apis.yml: open an issue on github.com/api-evangelist/foundation to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Film & Media Identifiers (EIDR, ISAN, MovieLabs, DPP)	standard	17.2 (thin)	-	-

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

APIs 2

Individual APIs this provider publishes, each with its own machine-readable definition.

Foundation Subgraph API

GraphQL API powered by The Graph protocol that indexes all Foundation NFT marketplace activity on Ethereum mainnet. Supports queries for NFTs, creators, collectors, auctions, bi...

Foundation Smart Contract API

Ethereum smart contract interface for direct on-chain interaction with Foundation marketplace contracts. Supports minting NFTs, creating and bidding in auctions, placing and acc...

GraphQL 1

GraphQL schemas published by this provider.

Foundation GraphQL API

Foundation was a creator-focused NFT marketplace built on Ethereum that enabled digital artists to mint, showcase, and auction unique digital artworks. The platform exposed a Gr...

GRAPHQL

Foundation API pricing

Not yet checked against Foundation's own pricing page. Compiled by API Evangelist; confirm before you rely on a figure.

Plan	Price
Free Subgraph Query (Hosted Service)	—
The Graph Network (Production)	—
Smart Contract (On-Chain)	—

Plan details, limits and sources →

Pricing Plans 1

Published pricing tiers and plan structures.

Plans

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Rate Limits

1 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Finops

FINOPS

Security Posture 2

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

Foundation Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Foundation Vulnerability Disclosure

no policy recorded

SECURITY

Resources

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

RateLimits

RateLimits

Releases

Releases

Commercial 4

Pricing, plans, and the legal terms of use

Plans

FinOps

TermsOfService

PrivacyPolicy

Company 4

The organization behind the API

Website

Website

Twitter

Twitter

Blog

Blog

LinkedIn

Source (apis.yml)

name: Foundation
description: Foundation is a creator-focused NFT marketplace built on Ethereum that enables digital artists to mint, showcase,
  and auction unique digital artworks. The platform provides a GraphQL API via The Graph protocol for querying artwork, auctions,
  bids, collector profiles, offers, buy-now listings, and edition drop data. Foundation smart contracts remain live on Ethereum
  mainnet, and the subgraph continues to index on-chain activity for programmatic access.
deliveryModel:
  model: saas
  license_evidence:
    not_product:
    - f8n/fnd-protocol
    - f8n/fnd-protocol-examples
  open_source: unknown
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: low
  source:
  - pricing
  - repository-not-product
  generated: '2026-09-25'
  method: derived
accessModel:
  pricing: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: low
  source:
  - plans
  - security
  generated: '2026-11-06'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/foundation.png
tags:
- NFT
- Digital Art
- Marketplace
- Ethereum
- Web3
- Blockchain
- Creators
- Auctions
- Collectors
created: '2026-06-13'
modified: '2026-06-13'
url: https://raw.githubusercontent.com/api-evangelist/foundation/refs/heads/main/apis.yml
specificationVersion: '0.23'
apis:
- name: Foundation Subgraph API
  description: GraphQL API powered by The Graph protocol that indexes all Foundation NFT marketplace activity on Ethereum
    mainnet. Supports queries for NFTs, creators, collectors, auctions, bids, offers, buy-now listings, percent splits, FETH
    escrow balances, and full event history. Developers use this as the primary programmatic interface to Foundation on-chain
    data.
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  baseURL: https://api.thegraph.com/subgraphs/name/f8n/fnd
  humanURL: https://thegraph.com/hosted-service/subgraph/f8n/fnd
  tags:
  - GraphQL
  - NFT
  - Subgraph
  - The Graph
  - Auctions
  - Digital Art
  properties:
  - type: Documentation
    url: https://github.com/f8n/fnd-protocol
  - type: GitHubOrganization
    url: https://github.com/f8n
  - type: GitHubRepository
    url: https://github.com/f8n/fnd-protocol
  - type: GitHubRepository
    url: https://github.com/f8n/fnd-protocol-examples
  - type: Plans
    url: https://raw.githubusercontent.com/api-evangelist/foundation/refs/heads/main/plans/plans.yml
  - type: RateLimits
    url: https://raw.githubusercontent.com/api-evangelist/foundation/refs/heads/main/rate-limits/rate-limits.yml
  - type: FinOps
    url: https://raw.githubusercontent.com/api-evangelist/foundation/refs/heads/main/finops/finops.yml
  - url: graphql/foundation-graphql.md
    type: GraphQL
  contact:
  - FN: Foundation Protocol Discussions
    url: https://github.com/f8n/fnd-protocol/discussions
- name: Foundation Smart Contract API
  description: Ethereum smart contract interface for direct on-chain interaction with Foundation marketplace contracts. Supports
    minting NFTs, creating and bidding in auctions, placing and accepting offers, buy-now listings, and deploying NFT collection
    contracts via the factory. Contracts are deployed on Ethereum mainnet and remain operational for direct RPC access via
    providers such as Alchemy or Infura.
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  baseURL: https://eth-mainnet.alchemyapi.io
  humanURL: https://github.com/f8n/fnd-protocol
  tags:
  - Smart Contracts
  - Ethereum
  - Solidity
  - Mainnet
  - NFT Minting
  - Auctions
  - RPC
  properties:
  - type: Documentation
    url: https://github.com/f8n/fnd-protocol
  - type: GitHubRepository
    url: https://github.com/f8n/fnd-protocol
  - type: NPMPackage
    url: https://www.npmjs.com/package/@f8n/fnd-protocol
  - type: BugBounty
    url: https://immunefi.com/bounty/foundation/
  - type: Plans
    url: https://raw.githubusercontent.com/api-evangelist/foundation/refs/heads/main/plans/plans.yml
  - type: RateLimits
    url: https://raw.githubusercontent.com/api-evangelist/foundation/refs/heads/main/rate-limits/rate-limits.yml
  - type: FinOps
    url: https://raw.githubusercontent.com/api-evangelist/foundation/refs/heads/main/finops/finops.yml
  contact:
  - FN: Foundation Protocol Issues
    url: https://github.com/f8n/fnd-protocol/issues
common:
- type: Plans
  url: plans/plans.yml
- type: RateLimits
  url: rate-limits/rate-limits.yml
- type: FinOps
  url: finops/finops.yml
- type: Website
  url: https://www.foundation.app/
- type: Releases
  url: https://github.com/f8n/fnd-protocol/releases
- type: VulnerabilityDisclosure
  url: security/foundation-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/foundation-domain-security.yml
- type: GitHubOrganization
  url: https://github.com/f8n
- type: TermsOfService
  url: https://foundation.app/tos
- type: PrivacyPolicy
  url: https://foundation.app/privacy
- type: Twitter
  url: https://twitter.com/foundation
- type: Blog
  url: https://foundation.app/blog
- type: LinkedIn
  url: https://www.linkedin.com/company/foundationapp
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

Foundation API — frequently asked questions

Does Foundation have an API?

Yes. APIs.io lists 2 APIs from Foundation, including Foundation Subgraph API and Foundation Smart Contract API.

How much does the Foundation API cost?

APIs.io lists 3 pricing plans for Foundation, with each plan's price, limits and inclusions under Pricing on this page.

Is the Foundation API ready for AI agents?

Foundation has a Kin Score of 22.8 out of 100 (emerging) and an Agent Readiness score of 15.5 (agent-aware), scored by API Evangelist on 2026-11-06.

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get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
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