Auctions
Variants seen in the corpus:
AuctionAuctions
Providers using this tag (32)
Ranked by API Evangelist rating — Exemplar and Strong are expanded by default.
Developing 3 Usable, with meaningful gaps to close
Thin 5 Limited public surface area
Emerging 15 Early or largely undocumented
Minimal 8 Almost no public developer surface
Unrated 1 Not yet scored
APIs with this tag (25)
Ranked by the provider's API Evangelist rating — the Kin Score is scored per provider, not per API, so every API of a provider shares its band. How the rating works →
Strong 1 Solid coverage with minor gaps
Developing 9 Usable, with meaningful gaps to close
Avito Auction APIThe Auction API from Avito — 1 operation(s) for auction.Manheim Event NotificationsPublish/subscribe business-event notification service for the Manheim auction lifecycle. Consumers register...Manheim Hypermedia API SuiteManheim's third-party integration surface — a suite of hypermedia (href-linked) JSON REST APIs over the who...A7 Analytics Platform - Auction Simulation APISimulate Xetra auctions against historical order book data on the A7 Analytics Platform.MISO FTR MPMA Market User APIThe Financial Transmission Rights / Multi-Period Multi-Auction market user API — four SOAP services coverin...Blizzard Entertainment Auctions APIRetrieve live auction-house listings per connected realm.Nord Pool Auction APIJSON REST API for day-ahead auction trading - integrated order submission and trade capture across the Nord...Nord Pool Auction APIThe Auction API from Nord Pool — 14 operation(s) for auction.SNHP Game Theory Layer APIThe hosted REST API on https://snhp.dev — 74 operations generated by FastAPI and served anonymously as Open...
Thin 10 Limited public surface area
SuperRare Rare Protocol CLICommand-line interface and SDK for deploying ERC-721 NFT collections, minting tokens, managing reserve-pric...SuperRare Smart Contracts - The BazaarUnified marketplace and auction house smart contract on Ethereum that enables reserve-price auctions, sale ...Flashbots Auction Relay (JSON-RPC)JSON-RPC endpoint for submitting bundles and private transactions to the Flashbots block builder. Supports ...Manifold Marketplace ContractsSmart contract system powering Manifold Gallery listings and Marketplace Widgets. Supports Auction Listings...FCC Spectrum Dashboard APIReturns a high-level overview of spectrum ownership across the United States within the 225 MHz to 3700 MHz...Squeeth Portal Auction APIWeb interface and data feed for the Crab Strategy weekly auction mechanism. The Squeeth Portal at squeethpo...Department of the Treasury Auctions APITreasury securities auctions dataTreasuryDirect Securities APIPublic reference data on marketable Treasury securities (auctions, results, security details) published via...Foundation Smart Contract APIEthereum smart contract interface for direct on-chain interaction with Foundation marketplace contracts. Su...Foundation Subgraph APIGraphQL API powered by The Graph protocol that indexes all Foundation NFT marketplace activity on Ethereum ...
Emerging 5 Early or largely undocumented
Whisky Hunter Auctions APIThe Auctions API from Whisky Hunter — 1 operation(s) for auctions.Rocket Pool Auction APIThe Auction API from Rocket Pool — 3 operation(s) for auction.Ten-XOnline commercial real estate transaction and auction platform for buyers and sellers of CRE assets.EPEX SPOT Day-Ahead and Intraday Auction Market Data APIRead-only API subscription (Day-Ahead and pan-EU Intraday API Read-only, EUR 1,040.00/month for internal us...EPEX SPOT MATS Auction Trading APIMember trading API for the Multiple Auction Trading System (MATS), the platform that replaced the legacy ET...
Companies reaching this through an API (13)
These companies publish an API, specification or operation carrying “Auctions” but do not classify their business under it. Listed unranked and kept out of the count above, because one tagged operation is not a statement about what a company does.
Avito
Blizzard Entertainment
Bullish
CoStar Group
Department of the Treasury
Deutsche Börse
FCC (Federal Communications Commission)
Flashbots
Manifold
MISO
Nord Pool
Opyn
Rocket Pool
Score breakdown
Frequency
49.1
log-scaled weighted occurrences
Breadth
0.9
spread across providers
Quality lift
23.9
mean composite of providers using it
Cohesion
3.5
strength of nearest seed neighbor
Related tags
Collectibles 11 co-occurrences
Art 6 co-occurrences
Smart Contracts 6 co-occurrences
Ethereum 7 co-occurrences
Marketplace 25 co-occurrences
Profiles 5 co-occurrences
Automotive 7 co-occurrences
Market Data 5 co-occurrences
Where this tag comes from
Provider tag32
Api tag25
Openapi tag6
Openapi op tag12
Cohort brief
Auto-generatedThe 31 providers in the APIs.io catalog tagged Auctions, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.
Providers
31
all scored
Mean Kin Score
19.4
-3.6 vs catalog 23
Mean Agent Readiness
9.5
-2.7 vs catalog 12.2
Spread
3.4–50.9
median 14.8 · σ 12.8
How the 31 split by band
Exemplar 0Strong 0Developing 3Thin 5Emerging 15Minimal 8
Facet averages, against the whole catalog
| Facet | This cohort | Catalog | Difference | Scored |
|---|---|---|---|---|
| Discoverability | 57.9 | 58 | -0.1 | 31 |
| Access Clarity | 25.2 | 26.5 | -1.3 | 31 |
| Contract Governance | 4.7 | 6.3 | -1.6 | 31 |
| Developer Ergonomics | 19.6 | 23.3 | -3.7 | 31 |
| Operational Transparency | 9.5 | 13.8 | -4.3 | 31 |
| Contract Quality | 12.1 | 17.8 | -5.7 | 31 |
A facet is averaged over the members that carry it, not over the whole cohort — the “Scored” column is that count. Averaging an absent facet as zero would score our own coverage gaps as the providers’ posture.
What this cohort publishes
| Artifact | This cohort | Catalog | Difference |
|---|---|---|---|
| MCP server (any) | 9% | 15% | -6 |
| MCP server (first-party) | 6% | 13% | -7 |
| Agent Skills | 0% | 0% | 0 |
| OAuth scopes | 13% | 12% | +1 |
| Security | 97% | 98% | -1 |
| Arazzo workflows | 3% | 2% | +1 |
| Governance rules | 9% | 13% | -4 |
mcp_pct counts any mcp/ artifact including ones API Evangelist derived from the provider OpenAPI; mcp_first_party_pct counts only servers the provider publishes. Prefer the latter.
Top by Kin Score
- 1 Cox Automotive 50.9
- 2 eBay 50.4
- 3 SNHP 40.7
- 4 SuperRare 35.8
- 5 Ariba Sourcing 35.1
- 6 CREXi 34.7
- 7 Foundation 28.8
- 8 Artsy 26.7
- 9 Whisky Hunter 25.4
- 10 Dripshop 23.6
Top by Agent Readiness
- 1 SNHP 43.4
- 2 Ariba Sourcing 33.5
- 3 Whisky Hunter 32.9
- 4 Cox Automotive 32.5
- 5 eBay 31.7
- 6 Connells Group 30.6
- 7 Artsy 26.1
- 8 SuperRare 25.5
- 9 Foundation 15.5
- 10 Dripshop 15.5
All 32 members of this roster resolve to a scored provider in
the catalog.Generated from the catalog build of
26 September 2026, across 27598
providers, using the same computation served by the
APIs.io cohort API. Briefs are published for rosters of
5 or more scored providers; below that a distribution is not meaningful.
Work with this as data
Every tag here is available over the APIs.io API and to AI agents over MCP.