The request is generic ('Marketplace API'), so no single product is named. Several sources offer marketplace-related APIs: Microsoft's Marketplace REST API (Azure private store catalog offers) 2, API Market's general API marketplace 1, upAPI and JoJ API as multi-API gateways 710, and Market Category Booster for marketplace category taxonomies over REST and MCP 4. Which fits depends on whether you need a cloud marketplace catalog, a general API catalog, or category mapping for listings.
A question back: Which kind of marketplace do you mean: a cloud marketplace catalog (such as Azure), a general API marketplace to buy APIs from, or a marketplace category or listing API for selling products?
- 1
Microsoft Marketplace REST APImicrosoft.comverified and signed
Exposes Microsoft.Marketplace REST operations, including searching azure private store marketplace catalog offers with totals and facets 12.
for agents: Operations_List · Search_PostArm
- 2
API Marketapi.marketwebsite read, tools not yet checked
A general marketplace where developers discover and buy APIs and AI models across many categories.
- 3
Market Category Boostermarket-category-booster.comverified and signed
Maps a product description onto the live category taxonomy of Amazon, eBay, Shopify or Google marketplaces over REST and MCP 14.
official:MCP server · Market Category Booster
for agents: List supported marketplaces · Categorize a product into a marketplace taxonomy
- 4
upAPIupapi.iowebsite read, tools not yet checked
An API marketplace where one key and one request shape call 60+ production APIs through a single gateway.
- 5
JoJ APIjojapi.comwebsite read, tools not yet checked
An API marketplace for scraping, search and real-world data APIs under one key, one gateway and one wallet.
official:MCP server · com.jojapi/marketplace
Sources
- 1API Marketplace: 1,360+ AI APIs, Data APIs, MCP Servers & more | API Marketapi.market · read 2026-10-29
- 2Microsoft – AI, Cloud, Productivity, Computing, Gaming & Appsmicrosoft.com · read 2026-10-29
- 4Market Category Booster — marketplace taxonomy, one level at a timemarket-category-booster.com · read 2026-10-29
- 7upAPI — The API Marketplace: One Key, Every APIupapi.io · read 2026-10-29
- 10JoJ API — API Marketplace for Scraper, Search & Data APIsjojapi.com · read 2026-10-29
- 12Microsoft Marketplace Search API: declares "Operations_List" (the record we read and signed)unfragile.ai · read 2026-10-24
- 14Market Category Booster: declares "List supported marketplaces" (the record we read and signed)unfragile.ai · read 2026-10-24
For agents: the 10 actions behind this answer
· API Market website read, tools not yet checked
API Marketplace trusted by 18,800+ developers, where you can buy and sell APIs. Discover Flight APIs, Face Swap, Text-to-Video APIs, marketing automation tools, integrations, and more!
Operations_List · Microsoft Marketplace Search API verified and signed
Lists all of the available Microsoft.Marketplace REST API operations.
Operations_List · Microsoft Marketplace Catalog Browse API verified and signed
Lists all of the available Microsoft.Marketplace REST API operations.
· Car Image API website read, tools not yet checked
Studio-quality, transparent-background car renders for marketplaces, wrap shops and dealer tools: 8 views, any paint color, any size. Free VIN decoding.
List supported marketplaces · Market Category Booster verified and signed
Returns the marketplaces whose taxonomy is loaded, i.e. the accepted values of store_id. Free of charge: without it an agent would have to pay for a failed call to discover them. e.g. {"method": "SendMessage", "params": {"message": {"role": "ROLE_USER", "parts": [{"data": {"skill": "list-supported-s
get_api · PayAPI Market verified and signed
Get detailed information about a specific x402 API by id or slug
demand.create_want · iwant.fyi verified and signed
Buy on behalf of your user: submit what they want to purchase and get back ranked, matched supply in the SAME call. Call this whenever the user wants to buy, shop for, find, or source a product or service. Matching is category-agnostic (any goods/services/other) and respects your constraints -- send
· upAPI website read, tools not yet checked
The API marketplace platform. One key, one gateway, every endpoint — call 60+ production APIs from one pooled quota, with copy-paste snippets in 8 languages.
· CompsAPI website read, tools not yet checked
The eBay sold listings API with up to 1,095 days of price history and the real accepted Best Offer price. Up to 240 sales per GET request as JSON. Replaces findCompletedItems and Marketplace Insights workflows. Free key, no card.
MarketplaceAgreements_Get · MarketplaceOrdering.Agreements verified and signed
Get marketplace terms.
Labels are the instruments' verdict and are never changed by ranking. Agents and robots get this same answer as JSON at /api/v1/find?q=…&answer=1 and through the MCP server.