The verdict in three sentences
In New York, an API connector between a business platform and a third-party system costs 8,000 to 30,000 USD and ships in 4 to 8 weeks, depending on the quality of the API on the other side. The build price is only part of the story: plan 15 to 20% a year for maintenance and a 4-hour recovery SLA, because a banking API or payment processor changes version at least once a year. A serious connector shows three verifiable traits: logging of every message, replay of failed messages, automatic alerting.
Connector price by target system
The IT director of a food and beverage distributor in Brooklyn wants to connect the ordering platform (900 retail accounts, 6,000 orders a month) to three systems. Costs vary widely by target.
| Connector | Budget (USD) | Timeline | Main difficulty |
|---|---|---|---|
| Payment processor (Stripe, Adyen, Authorize.net) | 8,000 to 14,000 | 4 to 5 weeks | Webhooks, reconciliation, refunds |
| Modern ERP with REST API (NetSuite, Dynamics 365, Acumatica) | 10,000 to 18,000 | 5 to 6 weeks | Mapping items, customers and sales tax |
| Legacy ERP without API (flat files, direct database) | 18,000 to 30,000 | 6 to 8 weeks | Building an intermediate exchange layer |
| Bank (statements, ACH, BAI2 or ISO 20022) | 14,000 to 25,000 | 6 to 8 weeks | Security, certificates, bank procedures |
| Carrier or 3PL | 8,000 to 12,000 | 4 weeks | Delivery statuses and tracking numbers |
| Messaging (SMS, WhatsApp Business) | 6,000 to 10,000 | 3 to 4 weeks | Approved message templates |
For the distributor's three priority connectors (payments, NetSuite, bank), the build budget comes to 32,000 to 57,000 USD. A shared architecture (message queue, central log) costs 6,000 to 10,000 USD more but cuts each subsequent connector by 20 to 30%.
Maintenance and SLA: what you pay every year
A connector is never finished. Partners change their APIs, certificates expire, volumes grow. Here are three contract levels as 2026 orders of magnitude.
| Service level | Annual cost (for 45,000 USD of connectors) | Response time | Recovery time | Monitoring |
|---|---|---|---|---|
| Basic | 6,750 USD (15%) | 1 business day | 2 business days | Email alerts |
| Standard | 9,000 USD (20%) | 2 business hours | 4 business hours | Dashboard and Slack alerts |
| Enhanced | 13,500 to 16,000 USD | 30 minutes, 7 days a week | 4 hours, 24/7 | On-call and monthly report |
For an order platform processing tens of thousands of dollars a day, Standard is the floor. Enhanced makes sense for payment flows during peak periods (month end, holiday season).
Four technical requirements to put in the contract
| Requirement | What it guarantees | Indicative extra cost |
|---|---|---|
| Logging of every inbound and outbound message (12-month retention) | Evidence in disputes with a partner | 1,200 to 2,500 USD |
| Queue and replay of failed messages | No lost orders during an ERP outage | 2,000 to 4,000 USD |
| Idempotency (a replayed message creates no duplicate) | No double charge or double invoice | Included if designed in from the start |
| Documentation and automated connector tests | Another vendor can take over | 10 to 15% of the connector |
Mini case study
Need a professional website?
Kolonell builds websites that attract clients, optimized for the Sénégalese market. Free quote in 2 minutes.
Daniel, IT director of a distributor in New York, measures today's cost: two clerks re-key orders into the ERP and reconcile card and ACH payments, at 5,500 USD a month each loaded, or 132,000 USD a year. Reconciliation errors cost about 2,500 USD a month, or 30,000 USD. Total: 162,000 USD a year. He invests 45,000 USD in three connectors plus 8,000 USD of shared infrastructure, with a Standard SLA at 9,000 USD a year. Assuming 80% of that cost is eliminated (129,600 USD), the net annual gain reaches 120,600 USD: payback in about 5 months.
FAQ
How much does an API connector cost in New York in 2026?
Between 8,000 and 30,000 USD depending on the target system, as an order of magnitude. A legacy ERP without an API or a bank requiring certificates sits at the top of the range.
Why pay yearly maintenance for a connector that works?
Partners change their APIs once or twice a year and certificates expire. Without a contract, a break can block orders for days, often costing more than the 15 to 20% annual fee.
What does a 4-hour recovery SLA mean?
The vendor commits to restoring the flow within 4 hours of the alert, with penalties if missed. Messages blocked during the outage are replayed without loss.
Should we use an iPaaS instead of custom development?
For simple flows, yes, with subscriptions from 50 to 500 USD a month (Zapier, Make, Workato tiers vary widely). It hits its limits with legacy ERPs and banks lacking standard connectors.
Can a nearshore team build and maintain our connectors?
Yes, teams in West Africa or Latin America quote 30 to 50% below New York rates. Insist on the same logging, replay and SLA clauses in the contract.
Let's scope your project. We audit your data flows and price each connector, from 8,000 to 30,000 USD, with a maintenance contract and a 4-hour recovery SLA, delivered in 4 to 8 weeks. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.
Mohamed Bah
Fondateur, Kolonell
Passionate about digital and entrepreneurship in Africa, Mohamed has been helping Sénégalese businesses with their digital transformation since 2020. Founder of Kolonell, he believes every SME deserves a professional and accessible online présence.
