Marketplace & two-sided apps

The backend for marketplace apps.

A marketplace app needs listings and search, buyer–seller chat, ratings and reviews, moderation, payments, and notifications. Amba provides typed collections with vector search for listings, real-time chat, reviews, a moderation queue, payments (your app is the seller), and push as one backend.

Get an API key Read the docsupdated June 12, 2026
or let your agent install it:
peer-to-peer marketplacesservices marketplaceslocal buy/sell apps

Hand the setup to your coding agent: it provisions Amba over hosted MCP and wires the SDK with no human in the loop. Marketplaces are two-sided trust machines: listings to discover, conversations to negotiate, reviews and moderation to build trust, and payments to close. Amba’s collections, chat, reviews, moderation, and payments surfaces cover the connective tissue; you own the marketplace logic. What is an agent-native backend?

what it needs

What a marketplace app backend actually needs.

01
Listings & search
Typed collections with public-read catalogs and vector search for semantic discovery.
02
Buyer–seller chat
Real-time direct and group messaging with read receipts.
03
Ratings & reviews
Star ratings and review text on listings and sellers, with aggregate stats.
04
Moderation
A queue for listings, messages, and reviews with keyword/regex rules.
05
Payments
Accept money in-app where your app is the seller, with a configurable platform fee and payouts.
06
Notifications
Push for messages, offers, and order updates, targeted by segments.
how amba covers it

How does Amba cover listings, chat, and payments?

Collections + vector search
Typed listings with public-read catalogs and findNearest semantic search for discovery.
Chat & realtime
Direct and group messaging with read receipts and live subscriptions for buyer–seller conversations.
Reviews & moderation
Ratings and reviews on any item with aggregate stats, feeding the same moderation queue as listings and messages.
Payments
Accept money in your app (your app is the seller): hosted onboarding, server-side charges, balance, and payouts with a configurable platform fee.
Push & segments
Order and message notifications targeted by live segments.
questions

Marketplace apps backend — FAQ

What backend does a marketplace app need?

A marketplace app needs listings and search, buyer–seller chat, ratings and reviews, moderation, payments, and notifications. Amba provides collections with vector search, real-time chat, reviews, a moderation queue, in-app payments, and push as one backend.

Can Amba handle marketplace payments?

Yes. Amba’s payments let your app accept money as the seller, with hosted onboarding, server-side charges, balances and payouts, and a configurable platform fee that settles to your own account.

Does Amba support listing search?

Yes. Amba’s typed collections support public-read catalogs and semantic vector search via findNearest, so listings are discoverable by meaning, not just exact match.

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