Invaluable

Invaluable is the world's leading online marketplace for fine art, antiques and collectibles, founded in 1986. The platform aggregates live and timed auctions from more than 5,000 premier auction houses across 53 countries, giving collectors worldwide a single place to discover, bid on, and win items — with over 260,000 items listed at any time and an archive of 66+ million price records. Invaluable also operates AuctionZip and a Private Label / Connect white-label offering, and provides a partner-only Catalog Upload API that lets auction-management software companies add, edit, and delete lots in timed and live sales directly from their own systems. The company is backed by Insight Partners.

Invaluable is profiled on the APIs.io network. Tagged areas include Company, Auctions, Marketplace, Art, and Antiques.

Invaluable’s developer surface includes API reference, support, engineering blog, pricing, and 6 more developer resources.

🌐 Visit website 📡 Source on GitHub

16.4/100 emerging ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-07-27 · rubric v0.5

0 APIs

CompanyAuctionsMarketplaceArtAntiquesCollectiblesE-CommerceBidding

Kin Score

Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5

Composite quality — 16.4/100 · emerging

Contract Quality 0.0 / 25

Developer Ergonomics 2.6 / 20

Commercial Clarity 6.3 / 20

Operational Transparency 0.7 / 13

Governance 0.0 / 12

Discoverability 6.8 / 10

Agent readiness — 0/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 15

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

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/invaluable: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

Documentation 1

Reference material describing how the API behaves

APIReference

APIReference

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

aid: invaluable
name: Invaluable
description: Invaluable is the world's leading online marketplace for fine art, antiques and collectibles, founded in 1986.
  The platform aggregates live and timed auctions from more than 5,000 premier auction houses across 53 countries, giving
  collectors worldwide a single place to discover, bid on, and win items — with over 260,000 items listed at any time and
  an archive of 66+ million price records. Invaluable also operates AuctionZip and a Private Label / Connect white-label offering,
  and provides a partner-only Catalog Upload API that lets auction-management software companies add, edit, and delete lots
  in timed and live sales directly from their own systems. The company is backed by Insight Partners.
url: https://raw.githubusercontent.com/api-evangelist/invaluable/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- insight-partners
x-tier: stub
x-tier-reason: portfolio-lead
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://www.invaluable.com/inv/about-us/wp-content/uploads/sites/64/2020/09/INV-White.png
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-19'
tags:
- Company
- Auctions
- Marketplace
- Art
- Antiques
- Collectibles
- E-Commerce
- Bidding
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: http://www.invaluable.com/
- type: APIReference
  url: https://www.invaluable.com/inv/apiinfo/
- type: Support
  url: https://www.invaluable.com/inv/help/
- type: Blog
  url: https://www.invaluable.com/blog/
- type: GitHubOrganization
  url: https://github.com/invaluable
- type: Pricing
  url: https://www.invaluable.com/inv/private-label/plans/
- type: TermsOfService
  url: https://www.invaluable.com/inv/agreements/terms-of-use/
- type: PrivacyPolicy
  url: https://www.invaluable.com/inv/agreements/privacy-policy/
- type: LLMsTxt
  url: llms/invaluable-llms.txt
- type: DomainSecurity
  url: security/invaluable-domain-security.yml
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence