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 →

Exemplar 8 Complete, well-documented, and agent-ready

Healthcare.gov Marketplace APIThe Healthcare.gov Marketplace API and accompanying Open Data Plan Finder exposes Qualified Health Plan (QH...85.2 Twilio Marketplace APIThe Marketplace API from Twilio — 8 operation(s) for marketplace.73.4 Kraken NFT APIREST API for Kraken's NFT marketplace surfaces: collections, asset lookups, listings, offers, watchlist, an...70.6 Telr Accounts and Split Payments APIMarketplace / split-payment Service API for sub-merchant onboarding, multi-split payments, debit/credit of ...69.7 Mirakl Connect APIsThe Mirakl Connect API — the seller-side network API behind Mirakl Connect, covering stores, channels, cata...68.7 Mirakl Marketplace Front APIsThe MMP Front API surface — machine-to-machine operations designed for storefront and CMS integration with ...68.7 Matomo Marketplace APIThe Matomo Marketplace API exposes 2 operations of the Matomo Reporting API (module `Marketplace`). Access ...67.3 Memo Bank Marketplace APIOAuth 2.0 authorization layer that lets third-party developers build Memo Bank Marketplace integrations and...67.0

Strong 18 Solid coverage with minor gaps

Hyperbolic GPU Marketplace APIDecentralized on-demand GPU compute marketplace renting idle H100, H200, A100, and RTX 4090 capacity from t...64.7 S&P Global MarketplaceData and analytics catalog spanning S&P Global business units (Market Intelligence, Ratings, Commodity Insi...64.6 HyperPay HyperSplitHyperSplit distributes a single collected payment across multiple sub-merchants or beneficiaries for market...64.2 Nursa Marketplace APIThe Marketplace API from Nursa — 6 operation(s) for marketplace.63.8 Clay IntegrationsCatalog of native connectors and 150+ data providers — Salesforce, HubSpot, Pipedrive, Apollo, Clearbit, Zo...61.3 Databricks Providers APIThe Databricks Providers API is part of Delta Sharing and allows you to create, update, list, and delete da...59.1 Coinflow marketplace APIThe marketplace API from Coinflow — 11 operation(s) for marketplace.58.8 Zai Assembly APIZai's core payments platform API. Onboard users, create and manage wallet accounts, items (transaction reco...58.7 LeafLink APIThe current LeafLink REST API, version 2022-10-31. 182 paths and 269 operations covering products and catal...58.5 Azure DevOps Extension Management APIAPI for managing extensions installed in an Azure DevOps organization. Enables programmatic listing, instal...58.3 Zendesk Apps APIThe Zendesk Apps API lets you manage apps installed on your Zendesk account. It lists all public apps on th...58.1 WordPress.com REST API - wpcom/v2 namespaceThe WordPress.com and Jetpack platform extension namespace — 1,716 operations covering hosting and code dep...56.8 WordPress.com REST API v1.3Additive alternate version of the WordPress.com REST API, publishing 19 endpoints including WordPress.com m...56.8 Dedalus Labs Marketplace APIThe Marketplace API from Dedalus Labs — 6 operation(s) for marketplace.56.2 Tackle Marketplace APIAWS Marketplace context endpoints used to assemble offers and amendments.55.9 Vercel WebhooksVercel Webhooks deliver platform events to a subscriber-configured HTTPS endpoint via HTTP POST with a JSON...55.9 Airwallex Platform APIThe Airwallex Platform API enables businesses to embed financial services into their products. Supports mer...55.6 Sendoso Marketplace and SmartSend APIBrowse the Sendoso marketplace catalog, get AI-selected gift recommendations for a recipient, and send eith...54.8

Developing 33 Usable, with meaningful gaps to close

DroneDeploy Apps PlatformThe DroneDeploy Apps Platform lets third parties build embedded apps and serverless "functions" that run in...54.2 PEXA Plus Marketplace B2B APIThe PEXA Plus Marketplace B2B API exposes marketplace services to business partners — health check, title s...54.1 Tensor WebSocket APISubscription-based realtime stream of Tensor marketplace events. Channels include `newTransaction` (every c...53.2 Artera Extended Data APIA Marketplace-vendor API that attaches custom partner content to a patient's upcoming or past appointment o...53.1 Oracle Marketplace APIThe Marketplace API from Oracle — 21 operation(s) for marketplace.53.0 Factorial Marketplace and Integrations APIIntegrations Framework and Marketplace endpoints used by partner integrations to register, surface, and ope...52.8 Azure Virtual Machine Images REST APIREST API for listing and querying available virtual machine images in Azure, including platform images, mar...52.7 Tackle.io Marketplace APIAWS Marketplace context endpoints used to assemble offers and amendments.52.2 Vast.ai REST APIThe Vast.ai REST API is the control plane for the GPU marketplace. It supports searching offers across host...52.2 Orthogonal API MarketplaceThe resold catalog itself — 795 payable operations across 58 third-party provider families (scraping, enric...52.0 OTO Global Marketplace APIThe Marketplace API from OTO Global — 2 operation(s) for marketplace.52.0 MuleSoft Anypoint Exchange APIThe Anypoint Exchange API provides programmatic access to MuleSoft's asset marketplace, enabling discovery,...51.9 Zoom Marketplace APIThe Zoom Marketplace API enables developers to access and manage application data within the Zoom ecosystem...51.1 iyzico Payment APIREST API for accepting card payments (NON-3DS and 3D Secure), hosted CheckoutForm and Pay with iyzico flows...50.6 Fortellis PlatformFortellis is CDK Global's open automotive commerce platform — an API gateway, app marketplace, and develope...50.4 Cyclr Marketplace APIDeploy Marketplace integration UI for end users50.1 Adobe Developer DistributionThe Adobe Developer Distribution portal for publishing and managing plugins and extensions in the Creative ...49.7 Help Scout Apps APIBuild sidebar applications that render custom content within the Help Scout Inbox UI for partner integrations.48.3 Horizon Blockchain Games Marketplace APIThe Marketplace API from Horizon Blockchain Games — 34 operation(s) for marketplace.48.1 Google Workspace Marketplace APIManage customer and user license status for Google Workspace Marketplace applications.47.5 Mercado Pago OAuth 2.0 APIOAuth 2.0 authorisation-code flow for platform integrations: marketplaces and partners obtain delegated acc...47.5 Clio App DirectoryThe Clio App Directory is the integration marketplace for certified third-party apps that connect to Clio M...46.5 Xata Marketplace APIOperations for linking user accounts to cloud marketplace subscriptions45.9 Magic Eden marketplace APIGet information about Magic Eden's marketplace!45.5 Spreadshirt Public Shop APISpreadshirt Public Shop API — REST API for building custom e-commerce storefronts against the Spreadshirt E...45.2 Ease Content & Marketplace APIThe public, anonymous WordPress REST API behind www.ease.com. It is not the Ease benefits administration AP...44.3 Sequence Marketplace APIThe Marketplace API from Sequence — 34 operation(s) for marketplace.42.0 PancakeSwap NFT Market SubgraphGraphQL subgraph for querying PancakeSwap NFT Market data on BNB Smart Chain, including NFT collections, li...41.4 CoreStory marketplace APIThe marketplace API from CoreStory — 6 operation(s) for marketplace.40.9 Akash Network Data APIIndexed network data over REST - blocks, transactions, deployments, leases, providers, GPU availability, an...39.9 AlayaMarket Marketplace APIREST API for the AlayaMarket staffing marketplace enabling supply and demand organizations to exchange shif...39.7 KW Marketplace Subscription & Metered Billing APIThe partner-facing surface behind the KW Marketplace, where vendors sell products to Keller Williams agents...39.7 Unstoppable Domains marketplace APIBrowse and search the Unstoppable Domains secondary marketplace. Retrieve paginated listings of domains ava...39.5

Thin 46 Limited public surface area

CI-Data Open API (by WES)Critical Infrastructure Data (CI-Data) Open API listed on the Brightlayer Experience Hub from solution-part...39.2 eBay Marketplace APIThe Marketplace API from eBay — 7 operation(s) for marketplace.37.9 Discogs Marketplace APIMarketplace listings, orders, fees, price suggestions, and release stats.37.8 SAP Ariba Discovery RFx Publication FROM External Marketplace APIImports RFx opportunities from external marketplaces into SAP Ariba.37.4 SAP Ariba Discovery RFx Publication TO External Marketplace APIPublishes RFx opportunities to external marketplaces for broader supplier discovery.37.4 SAP Ariba Public Catalogs Shop APIManages public marketplace catalog experiences for procurement users.37.4 uShip API v2The core uShip marketplace API — a RESTful, hypermedia-driven JSON API over the shipment lifecycle: searchi...37.0 uShip Cars and Light Trucks APIThe vehicle-transport slice of the uShip API — listing creation, published rates, and booking for cars and ...37.0 uShip Integrator Users APIUser-management endpoints for integration partners — provisioning and managing the uShip user accounts an i...37.0 Wolt Order / Marketplace APIReceive and fulfill consumer marketplace orders in a POS/in-store system: accept, reject, mark ready, mark ...37.0 MODIVO Commerce REST APIThe public REST surface of the MODIVO storefront, served by its Adobe Commerce / Magento 2.4 deployment at ...36.5 MODIVO Marketplace Seller API (Mirakl)MODIVO's third-party marketplace runs on a Mirakl tenant at modivo.mirakl.net. Sellers automate offers, sto...36.5 MODIVO Storefront GraphQL APIThe GraphQL endpoint that powers the MODIVO storefront and mobile applications, exposed at https://modivo.p...36.5 SuperRare Smart Contracts - The BazaarUnified marketplace and auction house smart contract on Ethereum that enables reserve-price auctions, sale ...36.0 Eightfold App MarketplaceMarketplace of certified partner and customer-built applications that extend the Eightfold Talent Intellige...35.9 S&P Global Marketplace Catalog APIAPI providing programmatic access to the S&P Global Marketplace catalog of premium fundamental and alternat...35.8 Manifold Marketplace ContractsSmart contract system powering Manifold Gallery listings and Marketplace Widgets. Supports Auction Listings...35.3 Manifold Royalty RegistryOn-chain smart contract registry that serves as a single source of truth for NFT royalties across all major...35.3 SmartRecruiters Assessment APIThe Assessment API allows customers to order assessment services available through the SmartRecruiters Mark...35.1 PagBank Marketplace / Split APIPayment-division (split) settlement for marketplaces and platforms. Splits a single charge across multiple ...34.8 Flipkart Marketplace Seller APIThe Flipkart Marketplace Seller API (v3) lets sellers and integration partners manage listings, orders, shi...34.7 Eclipse Marketplace APIREST API for accessing Eclipse Marketplace data including listings, categories, favorites, and installation...33.0 Zeabur Services APICreate services from git repositories, uploaded zips, Dockerfiles, or prebuilt marketplace codes; restart, ...33.0 Zeabur Templates & Regions APIList and retrieve deploy templates, deploy a template spec into a project, create and update custom templat...33.0 Open Service Broker APIThe Open Service Broker API is the open specification originally developed by Cloud Foundry and now used by...32.5 Lemonway APIREST API for marketplace payment infrastructure including pay-in, pay-out, wallet management, KYC/KYB onboa...32.4 QuickNode Marketplace Add-onsCatalog of opt-in add-on APIs (NFT API, Token API, DeFi API, Functions, etc.) attached to a QuickNode endpo...32.4 JetBrains Marketplace APIREST API for listing available plugins, uploading new plugin builds, and downloading plugin updates from th...32.1 Zentail Open APIZentail's Open API for building custom sales-channel, inventory, and fulfillment integrations and running b...31.7 Freshdesk App SDKThe Freshdesk App SDK allows developers to build custom applications that extend the functionality of the F...31.6 SoftwareOne Marketplace Platform APIThe SoftwareOne Marketplace Platform API provides programmatic access to the marketplace catalog, enabling ...31.0 iCIMS Marketplace Integrations APIThe iCIMS Marketplace Integrations API enables certified partners to build, publish, and manage integration...30.9 Glama MCP Server RegistryComprehensive index of 23,000+ MCP servers, 4,000+ managed connectors, and 169,000+ tools spanning 86 curat...30.3 Newegg Marketplace APISeller integration API for the Newegg marketplaces covering item, order, shipping-label, RMA, datafeed, rep...30.2 Raycast StoreThe Raycast Store distributes community and partner extensions. Publishing is done via the `ray` CLI and a ...29.1 Godot Asset Library APIThe Godot Asset Library REST API powers the community asset browser inside the Godot editor (AssetLib tab) ...28.7 Tokopedia / TikTok Shop Open PlatformFollowing GoTo's 2024 divestment of Tokopedia's e-commerce operations to TikTok Shop, integrations for what...28.2 Reservoir NFT APIAll-in-one NFT data and trading API enabling developers to get NFT data, create orders, and execute trades ...28.0 Iugu APIRESTful API providing 140+ endpoints for payment processing, customer management, invoicing, subscriptions,...27.9 Amazon Selling Partner API (SP-API)REST API that lets approved developers and sellers manage Amazon Selling Partner accounts including catalog...27.8 Blender Extensions PlatformThe Blender Extensions Platform (extensions.blender.org) provides a curated repository of addons, themes, a...27.2 Pagar.me Recipients APIOnboard and manage recipients (recebedores) — the sub-merchants that receive split payments in a marketplac...27.0 Pagar.me Settlements APIRetrieve settlements (pagamentos) — the actual money movements out of Pagar.me to recipients — individually...27.0 Pagar.me Transfers APICreate, cancel, list, and retrieve transfers from a recipient's Pagar.me balance to their registered bank a...27.0 PagBank Connect APIOAuth 2.0 authorization API enabling platform integrations (SaaS and marketplace models) to connect applica...26.5 Perpay Marketplace Checkout APIInternal REST API that powers checkout on the Perpay Marketplace. Handles product ordering, spending-limit ...26.3

Emerging 45 Early or largely undocumented

Arkham Intel Exchange (Dreadnought)Marketplace where users post and claim bounties for deanonymising specific addresses or unmasking activity....26.1 Discovery RFx Publication FROM External Marketplace APIPublishes RFx events from an external marketplace into SAP Ariba Discovery for sourcing activities.26.1 Discovery RFx Publication TO External Marketplace APIPublishes RFx events from SAP Ariba to external marketplaces for broader supplier participation.26.1 Envato Market APIREST API for ThemeForest, CodeCanyon, AudioJungle, VideoHive, GraphicRiver, 3DOcean, and PhotoDune. Endpoin...26.0 Toss Payments Payouts APIAPI for marketplace and platform operators to disburse funds to registered sellers. Supports seller registr...25.7 Lendio Loan Marketplace APIREST API for connecting small businesses with lenders. Supports loan application submission, eligibility ch...24.7 Getnet Marketplace APIPayment processing for multi-seller platforms: sub-seller onboarding, card capture (Visa, Mastercard, Elo, ...24.5 Wave Aggregated Merchants APISub-merchant management API for aggregators, payment service providers, and platforms that accept Wave paym...23.9 FBN Direct Inputs MarketplaceFBN Direct is the member-facing ecommerce marketplace offering 7,200+ crop protection, seed, fertilizer, li...23.3 EnergyHub Marketplace APIThe Marketplace API integrates the Mercury/Edge DERMS platform with utility marketplace providers and onlin...23.2 Unreal Plugins and Fab MarketplaceUnreal Engine has a first-class plugin architecture and a content and code marketplace. The historical Unre...22.7 Visual Studio Marketplace APIThe Visual Studio Marketplace API provides access to the extension marketplace for Visual Studio, VS Code, ...21.4 Houzz Seller & Vendor Commerce APIOfficial Houzz commerce API for third-party marketplace partners. Lets sellers and vendors sync product cat...21.0 Ronin Market Partner APIPartner API for NFT creators on Ronin Market - notably an NFT metadata refresh endpoint that lets approved ...20.4 Qualia Connect and Marketplace APIProgrammatic access to Qualia's national network of technology-enabled independent title agents and Marketp...20.2 Meesho Supplier / Order-Management APIPartner-gated API for onboarded Meesho suppliers and integration partners to sync catalog and inventory, fe...19.7 Gem Integrations MarketplaceIntegrations directory covering ATS, sourcing sites, productivity, HRIS & onboarding, scheduling, backgroun...19.4 Asaas Escrow Accounts APIHold funds in escrow ("contas de garantia") until a release condition is met, with API-driven release or re...19.1 Asaas Split Payments APIConfigure split rules on a charge so that the net amount is automatically distributed across one or more wa...19.1 KaBuM! Marketplace Seller Integration APIREST API for third-party sellers and integrators to connect to the KaBuM! marketplace (operated on the Mira...18.7 LiqPay Payouts APIAPI for merchant-initiated payouts (credit transfers) to customer cards or accounts. Used for marketplace d...18.3 Shipping.com Rate Intelligence PlatformShipping.com provides a marketplace and intelligence platform for the ocean freight and logistics industry....18.2 Apartments.com NetworkResidential rental marketplace network including Apartments.com, ForRent.com, and Westside Rentals, providi...17.5 Aramisauto Vehicle Catalog ContractsAramis Group publishes the machine-readable contracts behind the Aramisauto vehicle catalog as ten JSON Sch...17.5 BizBuySellOnline marketplace for buying and selling small and mid-sized businesses, with broker tools and financing p...17.5 Coupang Open APIThe Coupang Open API is a RESTful seller (vendor) API for managing the full marketplace lifecycle including...17.5 Domain GroupAustralian residential real estate marketplace and media company in which CoStar Group acquired a majority ...17.5 Homes.comResidential for-sale and rental marketplace operating agent-first branding and search, paired with the Home...17.5 Land.com / Lands of AmericaLand-for-sale marketplace network covering rural, ranch, recreational, and development land in the United S...17.5 LoopNetThe largest commercial real estate marketplace in the United States, surfacing CRE listings for sale and le...17.5 OnTheMarketUK residential property portal acquired by CoStar Group, providing for sale and to let listings with agent ...17.5 OLX Poland Partner APIOAuth2 partner API for OLX Poland (olx.pl) that lets integrators manage classified adverts (list, create, u...17.0 ADPADP is the largest payroll and HCM provider with the ADP Marketplace and ADP Workforce Now / Run / Vantage ...16.4 FBN Direct MarketplaceDirect-to-farmer e-commerce marketplace for crop inputs - seed, crop protection, adjuvants, and animal heal...15.9 BAXUS API (BoozApp / Marketplace)The BAXUS backend service (NestJS) that powers the marketplace and BoozApp: bottle and listing search, mark...15.5 TikTok Shop Open APIRESTful Open API for managing TikTok Shop seller accounts, products, orders, fulfillment, returns and refun...14.3 FedMallDoD procurement marketplace operated by DLA where authorized buyers from federal, state, local, tribal, and...14.2 Cline MCP MarketplaceMarketplace for MCP servers/tools that extend the Cline agent.14.1 LevelTen Energy Marketplace APIThe authenticated API behind the LevelTen Energy Marketplace. The host at api.levelten.energy self-identifi...13.7 Siemens Healthineers Digital MarketplaceCurated catalog distributing Siemens Healthineers and partner clinical and operational applications across ...13.4 Insurify Consumer MarketplaceConsumer comparison platform pulling real-time quotes from 120+ carriers, with AI-powered declaration page ...13.1 ShopSimon Retailer APIShopSimon is Simon's e-commerce platform integrating online and offline retail. The ShopSimon Retailer Hub ...11.9 Zyla API HubZyla API Hub provides a centralized marketplace for discovering, testing, and integrating thousands of APIs...11.9 Limepay Platform APIREST API for platform and marketplace integrations to onboard and manage sub-merchants: create platform mer...11.7 Visual Studio Marketplace APIREST API for querying and retrieving Visual Studio and VS Code extensions, publishers, versions, and assets...11.7

Minimal 3 Almost no public developer surface

Bukalapak REST APIBukalapak's public REST API for marketplace resources such as products and the authenticated user profile, ...8.9 EcoVadis Marketplace APIThe EcoVadis Marketplace API is a specialized instrument crafted to exchange mission-critical sustainabilit...8.9 Mercado Libre Platform APICore REST API for the Mercado Libre marketplace covering items, categories, search, orders, questions, mess...8.0

Score breakdown

Frequency

83.3

log-scaled weighted occurrences

Breadth

26.2

spread across providers

Quality lift

21.0

mean composite of providers using it

Cohesion

15.0

strength of nearest seed neighbor

Where this tag comes from

Provider tag874

Api tag153

Openapi tag17

Openapi op tag89

Cohort brief

Auto-generated

The 955 providers in the APIs.io catalog tagged Marketplace, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.

Providers

955

all scored

Mean Kin Score

17.6

-3.1 vs catalog 20.7

Mean Agent Readiness

-2.7 vs catalog 9.7

Spread

0.1–85.2

median 12.3 · σ 15.4

How the 955 split by band

Exemplar 8Strong 26Developing 87Thin 94Emerging 314Minimal 426

Facet averages, against the whole catalog

Facet	This cohort	Catalog	Difference	Scored
Access Clarity	21.8	22.3	-0.5	955
Discoverability	59	60.4	-1.4	955
Contract Governance	4.3	6.4	-2.1	955
Operational Transparency	8.2	11.3	-3.1	955
Developer Ergonomics	14.3	17.9	-3.6	955
Contract Quality	11.6	17.5	-5.9	955

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)	14%	16%	-2
MCP server (first-party)	5%	7%	-2
Agent Skills	0%	0%	0
OAuth scopes	8%	9%	-1
Security	91%	88%	+3
Arazzo workflows	3%	2%	+1
Governance rules	7%	13%	-6

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 Centers for Medicare and Medicaid Services 85.2
2 Twilio 73.4
3 Efí Pay (Gerencianet) 70.6
4 Kraken 70.6
5 Telr 69.7
6 Mirakl 68.7
7 Matomo 67.3
8 Memo Bank 67
9 Hyperbolic 64.7
10 S&P Global 64.6

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get_cohortThis tag as a scored cohort — every provider carrying it, with scores.
cohort_statsPRO — the distribution across this tag: mean, median, band split, adoption rates.
cohort_rankingsPRO — the leaderboard, on composite AND agent-readiness axes.
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.

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This tag

curl "https://apis.io/api/v1/tags/marketplace"

All tags

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

As a scored cohort

curl "https://apis.io/api/v1/cohorts/tag/marketplace"

The distribution (Pro)

curl "https://apis.io/api/v1/cohorts/tag/marketplace/stats" \
  -H "X-API-Key: $APIS_IO_KEY"

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Marketplace

Providers using this tag (955)

APIs with this tag (153)