Multichannel e-commerce API for inventory, orders, listings, and promotions
Automate your e-commerce operations with a powerful REST API. Manage inventory, listings, pricing, and orders across all your sales channels from a single source of truth. Ideal for growing sellers, software vendors, and tech-savvy e-commerce agencies.
Publish, sync, manage — all through a single API
One API, every marketplace
Connect once and publish products across Amazon, eBay, Etsy, TikTok Shop, Shopify, WooCommerce, and more — without building separate integrations.
Write once, update everywhere
Manage products, inventory, and pricing from your own systems and automatically keep every sales channel in sync.
Add channels without extra complexity
Expand to new marketplaces without new code, credentials, or ongoing integration work.
Built for real-world catalogs and orders
Handle large catalogs, bulk SKUs, custom pricing rules, and normalized orders through a single consistent structure.
Validate before you publish
Check categories, attributes, and marketplace requirements upfront to prevent listing errors and rejected products.
We maintain the integrations for you
Marketplace APIs change constantly. We handle updates behind the scenes so your connection stays reliable.
Connect every channel
Nembol API integrates with the platforms where your customers buy
Automate your workflow
- Bulk listing creation
- Cross-channel inventory updates
- Automated price synchronization
- Order import and tracking
- Content management at scale
- Webhook notifications
What do teams build with the Nembol API?
An agency building once, for every client
Build the integration once and run it per client, each store with its own scoped key. Client data stays isolated, and access ends the moment you delete the key.
A headless site on a live catalog
Read your full catalog and real stock through the API to power a custom storefront or product feed. One source of truth behind your site and every marketplace.
Stock pushed from a warehouse system
Sync quantities to Amazon, eBay, Etsy and Shopify as the WMS changes them. Overselling stops being something you reconcile after the fact.
Repricing from your own engine
Push prices for up to 100 SKUs per call, driven by your own rules, cost changes or competitor feeds. Per-channel markup applies on the way out.
Content pushed from a PIM
Send titles, descriptions and images in batches. Every connected channel picks up the change without a second request.
Orders into an existing ERP
Pull orders from every channel in one shape, then post tracking back. Nembol notifies the source marketplace for you.
Built to be trusted with production
Scoped access, signed deliveries, and safe retries — the guarantees you need before wiring a live catalog to an API.
Scoped API keys
Bearer keys created in your dashboard, scoped to a single store and carrying only the permissions you grant. Revoke a key and access stops immediately.
Safe retries
Every response reports your remaining quota, and 429s carry an exact Retry-After. Send an Idempotency-Key on any write and replaying it returns the original response instead of duplicating the operation.
Encryption in transit
Every API call runs over HTTPS. Webhook endpoints must be HTTPS too — plaintext URLs and private network addresses are rejected at registration.
Signed webhooks
Every delivery carries an HMAC-SHA256 signature over the raw body plus a timestamp, so you can reject anything replayed or forged. Rotate the signing secret with no downtime — the previous one keeps validating for 24 hours.
Durable event log
Orders, products, inventory, listings and operations all emit events, retained for 30 days. Replay them to reconcile after downtime, or poll the log and skip webhooks entirely.
Test mode
Use a test key and writes are fully validated but never persisted and never reach your channels. Simulated results come back marked as such, so your integration tests read exactly like production.
Multichannel ecommerce API: frequently asked questions
What is a multichannel ecommerce API?
A multichannel ecommerce API is a single programmatic interface that reads and writes product, inventory, pricing and order data across several sales channels at once. Instead of integrating separately with Amazon, eBay, Etsy and the rest, you integrate once and the API translates your requests into whatever each marketplace expects.
How do I sync inventory across marketplaces with an API?
Keep one authoritative stock number in your own system and push it through a single endpoint. Nembol propagates the change to every connected channel, and decrements quantities across the others when a sale happens on one. You never write marketplace-specific stock logic, and you never reconcile two channels against each other.
Do I need a separate integration for each marketplace?
No. That is the problem this API exists to remove. One set of endpoints covers every channel Nembol connects, and when a new marketplace is added your existing integration reaches it without new code or new credentials.
Which channels does the Nembol API connect?
The API reaches every channel the Nembol platform supports, including Amazon, eBay, Etsy, TikTok Shop, Shopify, WooCommerce, Squarespace, Square and OnBuy, among others. Because the contract is the same for all of them, adding a channel is a configuration change rather than a development project.
Is the Nembol API free?
API access comes with your Nembol subscription rather than as a separate product, and you can try the whole platform free with no credit card. Create an account, generate a scoped key from your dashboard and start making calls.
How do I test an integration without touching live listings?
Use a test key. Writes are fully validated but never persisted and never reach your sales channels, and simulated results come back marked as simulated. Your integration tests read exactly like production without any risk to a live catalog.
What happens if a webhook delivery fails?
Nothing is lost. Every event is written to a durable log retained for 30 days, so you can replay it to reconcile after downtime. Some teams skip webhooks entirely and poll the log instead. Deliveries are signed with HMAC-SHA256 so you can reject anything replayed or forged.
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