Who is SP-API development for?
Amazon brands and sellers whose team repeats Seller Central work by hand, and businesses that serve sellers: agencies, 3PLs and prep centers (see the Pacific Prep build) and software teams building a seller tool.
Since 2017Amazon SP-API specialists
Custom Amazon SP‑API software, built on your own accounts.
We build custom SP-API software that wires your orders, inventory, pricing, ads, reports, FBA and finance into one dashboard you own — replacing the stack of SaaS tools you pay for today.
REST / JSON · OAuth MWS-era tools rebuilt on SP-API Scheduled reports automated
2017On Amazon's seller APIs since
50+Tools shipped
20+Marketplaces live
sellingpartnerapi-na.amazon.com
// Search orders (Orders API v2026-01-01)GET/orders/2026-01-01/orders marketplaceIds: "ATVPDKIKX0DER", createdAfter: "2026-10-01T00:00:00Z"200 OK // Create an FBA inbound plan (v2024-03-20)POST/inbound/fba/2024-03-20/inboundPlans
Orders/orders/2026-01-01
Reports/reports/2021
FBA Inventory/fba/inventory
Pricing/products/pricing
REST · JSONDynamic rate-limits
OAuth authorisedPer-seller auth flow
We build on
Amazon SP-API development, in short
Who it is for, what we build, how long and how it is priced.
Ecomsellertool builds custom software on Amazon’s Selling Partner API (SP-API) and Ads API for brands, agencies, 3PLs and software teams, and has done so since 2017. Each build starts with a written plan that names the scope, the timeline and a fixed price before any work begins. You keep your accounts, your data and the custom code we build; the Growth OS base is licensed to you.
What gets built?
Three kinds of project: a single integration (orders, reports, feeds or FBA inventory into a system you already use), a dashboard that joins several SP-API areas with your other channels, or a full multi-marketplace platform such as Ecom Global. The twelve areas below are the usual building blocks.
How long does an SP-API project take?
The timeline is written into the plan before work starts. It depends on how many SP-API areas and marketplaces connect, the data volume, and, for an app other sellers will authorize, Amazon’s own developer review. Our registration guide covers that step.
How does pricing work?
Each build gets a fixed price in the written plan, before any work begins. Support after launch is optional and monthly. The SP-API development cost guide lists the typical ranges by project type, and what moves a price up or down.
Before you build
Which SP-API versions should a new build use in 2026?
A new SP-API integration should start on the current versions below, and an older tool should be checked against the dates in the middle column: Amazon says calls to a removed resource fail from the removal date. Every row comes from Amazon’s SP-API deprecation schedule and the linked API guides, checked October 23, 2026.
| Area | Older version or item | Deprecated / removed | Use instead |
|---|---|---|---|
| Orders | Orders v0: getOrders, getOrder, getOrderItems, buyer-info and address calls | Jan 28, 2026 / Mar 27, 2027 | Orders v2026-01-01: searchOrders and getOrder with includedData; personal data through roles, no Restricted Data Token |
| Order events | ORDER_STATUS_CHANGE notification | Jun 21, 2023 / Jul 29, 2026 (removed) | ORDER_CHANGE, which also covers buyer-requested cancellations |
| FBA inbound | Fulfillment Inbound v0 plan and shipment calls (createInboundShipmentPlan, createInboundShipment, transport calls) | Apr 1, 2024 / Jan 21, 2025 (removed) | Fulfillment Inbound v2024-03-20 (createInboundPlan); v0 getLabels and getBillOfLading stay in use |
| Finance | Finances v0: listFinancialEvents and the by-group and by-order calls | Jul 21, 2025 / Aug 27, 2027 | Finances v2024-06-19 (listTransactions) |
| Settlement reports | GET_V2_SETTLEMENT_REPORT_DATA_FLAT_FILE and _XML | Mar 17, 2025 / Nov 11, 2026 | GET_V2_SETTLEMENT_REPORT_DATA_FLAT_FILE_V2 (charges in amount-type, amount-description and amount columns) |
| Listings feeds | XML and flat-file listings feeds such as POST_PRODUCT_DATA and POST_INVENTORY_AVAILABILITY_DATA | Mar 18, 2024 / Dec 3, 2025 (removed) | JSON_LISTINGS_FEED or the Listings Items API |
The settlement report change lands first, on November 11, 2026, so a finance or reconciliation tool that still reads the old settlement files needs work this quarter (our payouts recipe lists what to change). If you run a tool built before 2026 and are not sure which calls it makes, send it as a project brief: we list the calls that hit a removed or deprecated version and quote the migration as a fixed price.
REST · JSON · OAuth
- 10,000+Amazon sellers trust Grow8
What is Amazon SP-API?
The API behind most routine Seller Central work.
SP-API is Amazon’s official REST interface for sellers and vendors. Most of the work a team repeats in Seller Central — pulling reports, updating listings, creating shipments, adjusting prices, answering buyers — has an API route through it.
We have built on Amazon’s seller APIs since 2017 and shipped 50+ tools on them.
2017On seller APIs since
50+Tools shipped
SQSEvent notifications
What you can automate
Seller Central workflows, wired into one system.
Twelve SP-API resource areas cover the routine work an operations team repeats by hand: orders, listings, inventory, reports and more. Pick the ones you need and we wire them into one dashboard, with the decisions left to your team.
Orders
Orders API
Sync new orders and line items into your system as they change.
Inventory
FBA Inventory API
Stock levels across fulfillment centers, reserved quantity and reorder alerts.
Reports
Reports API
Schedule the Amazon reports you need, cleaned and loaded into your database.
Pricing
Product Pricing API
Repricing rules, offer data and Buy Box tracking.
Listings
Listings Items · A+ Content
Listing updates, variations, images and A+ content in bulk.
FBA Inbound
Fulfillment Inbound API
Create inbound shipments, generate box labels and track pack plans.
FBA Outbound
Fulfillment Outbound API
Ship DTC orders via MCF and track shipments end-to-end.
Finance
Finances API
Reconcile settlements, fees, refunds and reimbursements.
Notifications
Notifications API
Order, listing, inventory and offer-change events delivered to Amazon SQS or EventBridge.
Feeds
Feeds API
Bulk price, inventory and catalog updates through feeds.
Listing issues
Notifications · Listings
Alerts when a listing gets new issues, loses buyability or the account status changes.
Messaging
Messaging · Solicitations
Buyer messages Amazon’s rules allow, and review requests through the Solicitations API.
Need an endpoint we didn’t list?Send the workflow: we map it to the right SP-API resources and reply with a written plan and a fixed price.
Automation in action
Real tools we’ve shipped to automate seller ops.
Three blueprints we build on. Each takes a routine off someone’s desk.
Seller7 Orders & fulfillment
Orders → fulfillment, without re-keying
- New orders picked up from Amazon’s order-change notifications
- Auto-create FBA inbound shipments & labels
- Multi-channel fulfillment for DTC & Shopify
Growth OS · inventory agent Inventory & catalog
Inventory & listings, kept in sync
- Stock levels across fulfillment centers & your warehouses
- Bulk listing & A+ content updates via feeds
- Reorder alerts & listing-issue alerts
Growth OS Reports, ads & finance
Reports, ads & finance, reconciled
- Scheduled reports piped into your DB
- Ads bid automation & daypart rules
- Settlement, fee & reimbursement reconciliation
What we build
12 production modules — mix, match or extend.
Every pill below is a live module we’ve shipped on the SP-API. Combine them into the tool your business actually needs.
Profit & P&L analytics
Inventory management
Listing creator & manager
Multi-channel sync (Amazon ↔ Shopify ↔ Walmart)
Ads reporting & bid automation
Report automation (scheduled reports)
FBA fee calculator
Amazon → Sheets / BigQuery sync
Inbound shipment automation
Buy-box repricer
Reimbursement automation
Purchase order & supply chain
See it in productionExplore the Amazon SP-API tools we’ve shipped.Seller intelligence platforms, ads dashboards, catalog health tools and more — all built on the SP-API and Advertising API.
100+ teams run on software we built, including
How we work
A 4-step build. No surprises.
You’ll know the architecture, the price and the timeline before we write a line of code. Weekly Friday demos, staging access, and a clean hand-off at the end.
Discovery
30-minute fit call. We map your marketplace footprint, current SaaS spend and SP-API needs.
Architecture
A written doc: data model, API surface, AI agents, go-live date and fixed price.
Build in sprints
Weekly Friday demos. We ship to your staging, you stress-test with live SP-API data.
Launch & own it
You keep the custom code we build, the infra and the docs. We stay on for maintenance — or hand off cleanly.
Send one SP-API workflow
Describe the workflow you want automated. We reply with a written plan: scope, timeline and a fixed price.
FAQ
Questions about Amazon SP-API
Short, honest answers — the same ones we give on a discovery call. Don’t see your question? Ask us directly.
What can I actually automate with SP-API?
Most of the routine work your team repeats in Seller Central. Concretely:
- Orders — pull new orders and line items as they change.
- Inventory — stock levels, reorder alerts, bulk updates via feeds.
- Reports — schedule the Amazon reports you need into your DB or Sheets.
- Pricing — repricing, Buy Box tracking and offer intelligence.
- FBA — inbound shipment creation, labels and outbound tracking.
- Ads, finance & messaging — campaigns, settlements, review requests.
How is SP-API different from the legacy MWS?
MWS (Marketplace Web Service) was Amazon’s older, XML-based seller API. Amazon’s current developer documentation covers the SP-API: a REST API with OAuth authorization per seller, per-operation usage plans, event notifications delivered to Amazon SQS or EventBridge, and APIs MWS never had, such as Solicitations for review requests. If you still run a tool built on MWS-era code, we audit it and rebuild it on the current SP-API models.
Do you also cover the Advertising API and PA API?
Yes. We build on the Amazon Advertising API (Sponsored Products, Brands, Display — reports, campaign CRUD, bidding, targeting) and the Product Advertising API for affiliate/catalog use-cases. We stitch SP-API, Ads API and marketplace APIs (Walmart, eBay, Shopify, TikTok Shop) into a single dashboard when you need it.
Is the SP-API Orders API v0 still working in 2026?
Yes, until March 27, 2027. Amazon deprecated the v0 order operations (
getOrders,getOrder,getOrderItemsand the buyer-info and address calls) on January 28, 2026 and lists that removal date in its deprecation schedule. The replacement is Orders API v2026-01-01:searchOrdersandgetOrderwith anincludedDataparameter, and personal data through roles instead of Restricted Data Tokens (Amazon’s migration guide). Any order sync written before 2026 needs this change.Does Amazon charge developers for SP-API access?
Not at the moment. Amazon had planned an annual fee and usage fees for third-party SP-API developers, then wrote that it “will not move forward with the SP-API usage and annual fees at this time” (Amazon’s notice, checked October 23, 2026). What a build costs is the development and hosting, covered in the cost guide.
How fast can you ship a tool and what does it cost?
Send a project brief and a person replies within 2 business days with a written plan: scope, timeline and a fixed price. A single integration is the shortest kind of build; a multi-marketplace platform the longest (typical ranges are in the cost guide). You get weekly Friday demos on your staging and optional monthly support after launch.
Schedule a call
Ready to build your Amazon tool on the SP-API?
30-minute fit call. No pitch deck. We map your SaaS spend, your marketplace footprint and the custom Seller tool we could ship to replace it, with a fixed price and a go-live date.
Free · 30 minutes · Pick any open slot