Shopify integration hub
Custom API integration apps for Shopify
5 apps state on their Shopify listing that they work with Custom API. Grouped by category, ranked by the public formula.
Custom API is itself on the Shopify App Store: Custom Authors.
Apps naming it
5
Categories
8
Reviews across them
143
With a free plan
2
Product comparison: 1 app
| # | App | Rating | Reviews | Last 180 days | From | Free plan | Trial | Built for Shopify | Launched | Integrations | Tier |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 |  W3 Product AccessoriesAllow customers to purchase related products in one click | 4.7(111) | 111 | 0 | $6.99/month | No | 10 days | No | 2015 | Custom API | Established |
Upsell and cross-sell: 1 app
| # | App | Rating | Reviews | Last 180 days | From | Free plan | Trial | Built for Shopify | Launched | Integrations | Tier |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | W3 Product AccessoriesAllow customers to purchase related products in one click | 4.7(111) | 111 | 0 | $6.99/month | No | 10 days | No | 2015 | Custom API | Established |
Loyalty and rewards: 1 app
| # | App | Rating | Reviews | Last 180 days | From | Free plan | Trial | Built for Shopify | Launched | Integrations | Tier |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 |  CreditsYard — Store CreditStore credit digital wallet for returns, exchanges & cashback | 4.9(19) | 19 | 1 | $29/month | No | 7 days | No | 2021 | Conjured Memberships, Custom API, DiscountYard +3 | Emerging |
Returns and exchanges: 1 app
| # | App | Rating | Reviews | Last 180 days | From | Free plan | Trial | Built for Shopify | Launched | Integrations | Tier |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | CreditsYard — Store CreditStore credit digital wallet for returns, exchanges & cashback | 4.9(19) | 19 | 1 | $29/month | No | 7 days | No | 2021 | Conjured Memberships, Custom API, DiscountYard +3 | Emerging |
Dropshipping: 1 app
| # | App | Rating | Reviews | Last 180 days | From | Free plan | Trial | Built for Shopify | Launched | Integrations | Tier |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 |  Tshirtgang Print On DemandPrint on Demand company specializing in DTG and DTF | 4.7(12) | 12 | 0 | Free plan | Yes | none | No | 2017 | Amazon, Custom API, eBay +3 | Emerging |
Wholesale: 1 app
| # | App | Rating | Reviews | Last 180 days | From | Free plan | Trial | Built for Shopify | Launched | Integrations | Tier |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Tshirtgang Print On DemandPrint on Demand company specializing in DTG and DTF | 4.7(12) | 12 | 0 | Free plan | Yes | none | No | 2017 | Amazon, Custom API, eBay +3 | Emerging |
Affiliate programs: 1 app
| # | App | Rating | Reviews | Last 180 days | From | Free plan | Trial | Built for Shopify | Launched | Integrations | Tier |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 |  Referbi ‑ Affiliate MarketingGet more out of every customer inviting friend to purchase | 5.0(1) | 1 | 0 | $25/month | No | 14 days | No | 2024 | Branded emails, Custom API, Discounts +3 | New |
Inventory optimization: 1 app
| # | App | Rating | Reviews | Last 180 days | From | Free plan | Trial | Built for Shopify | Launched | Integrations | Tier |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 |  StreamlineReduce stockouts and excess inventory | No ratings yet | 0 | n/a | Free plan | Yes | none | No | 2024 | Built-in ERP connectors, Custom API, Database +1 | New |
Integrations that co-occur
Other tools named on the same listings as Custom API.
Data as of Oct 19, 2026, from the public Shopify App Store listing. How the numbers are computed: methodology.