API Integration Services
Connect your systems with APIs that retry, monitor and never lose an order.
REST and event-driven integrations between ERP, CRM, payments, GST and logistics, with monitoring and replay.
- REST and events
- Monitoring and retries
- Legacy wrappers
Free 30-minute call with a senior specialist. Reply within one business day. Based in Jaipur, working with businesses across India.
- Discovery callFree 30 minutes with a senior specialist
- Scoped first phaseWritten scope, timeline and fixed price
- Build with weekly demosWorking software you can see every week
- Launch and supportGo-live with your team ready, then ongoing support
What are API integration services?
API integration services connect separate business systems so data moves automatically and reliably instead of through exports and re-keying. Stack18 builds REST and event-driven integrations across ERP, CRM, payment, GST and logistics systems, with monitoring, retries and replay.
You need this when…
Tap the ones that apply to you.
API Integration Services, end to end.
Each capability is delivered by the same team on the Agentic SDLC, with your approval at every critical step.
Integration design
Map the flows.
- S
- y
- s
- t
- e
- m
- a
- n
- d
- d
- a
- t
- a
- m
- a
- p
- |
- M
- a
- p
- p
- i
- n
- g
- r
- u
- l
- e
- s
- |
- E
- r
- r
- o
- r
- h
- a
- n
- d
- l
- i
- n
- g
API development
Clean interfaces.
- R
- E
- S
- T
- A
- P
- I
- s
- |
- E
- v
- e
- n
- t
- -
- d
- r
- i
- v
- e
- n
- f
- l
- o
- w
- s
- |
- V
- e
- r
- s
- i
- o
- n
- i
- n
- g
Legacy wrappers
Open old systems.
- A
- P
- I
- l
- a
- y
- e
- r
- o
- v
- e
- r
- l
- e
- g
- a
- c
- y
- |
- D
- a
- t
- a
- v
- a
- l
- i
- d
- a
- t
- i
- o
- n
- |
- P
- h
- a
- s
- e
- d
- r
- e
- p
- l
- a
- c
- e
- m
- e
- n
- t
Common integrations
Indian stack.
- T
- a
- l
- l
- y
- ,
- G
- S
- T
- ,
- p
- a
- y
- m
- e
- n
- t
- s
- |
- L
- o
- g
- i
- s
- t
- i
- c
- s
- |
- M
- a
- r
- k
- e
- t
- p
- l
- a
- c
- e
- s
- a
- n
- d
- s
- t
- o
- r
- e
- s
Monitoring
Fail loudly.
- A
- l
- e
- r
- t
- s
- |
- R
- e
- t
- r
- i
- e
- s
- a
- n
- d
- r
- e
- p
- l
- a
- y
- |
- D
- a
- s
- h
- b
- o
- a
- r
- d
- s
Security
Controlled access.
- A
- u
- t
- h
- e
- n
- t
- i
- c
- a
- t
- i
- o
- n
- |
- R
- a
- t
- e
- l
- i
- m
- i
- t
- s
- |
- A
- u
- d
- i
- t
- t
- r
- a
- i
- l
A typical engagement, step by step.
Senior people lead every phase. Specialised AI agents on the Agentic SDLC handle the repetitive work, and nothing ships without your approval.
Discover
Map the current process, data and priorities.
Design
Agree modules, integrations and rules.
Build
Configure and extend in weekly demos.
Launch
Data migration, training and go-live support.
Start small. Scale when it works.
Every engagement begins with a short, fixed-price step so you can judge the fit before committing further. See pricing.
Integration Discovery
Teams deciding what to build first.
- Duration
- 1–4 weeks
- Pricing
- Fixed price
- Scoped plan and timeline
- Team and fixed price
- Process map or prototype
Integration programme
Teams that want to go live fast.
- Duration
- 4–12 weeks
- Pricing
- Fixed price
- API layer
- Monitoring
- Documentation
Integration pod
Needs that a ready-made system does not cover.
- Duration
- Ongoing
- Pricing
- Fixed price per phase
- Weekly working demos
- Senior team accountable
- 30 days hypercare
What we have shipped, and what a typical engagement looks like.
Delivered projects link to the full case study. Illustrative scenarios describe typical engagements and are not named client results.
Cooperative bank
- Challenge
- Nightly files failing.
- What we do
- API layer and events.
3 months
Retailer
- Challenge
- Systems disconnected.
- What we do
- API sync with monitoring.
4–8 weeks
Ethnic wear D2C, Jaipur
- Challenge
- A ₹100+ crore brand needed website, app and back office to share one catalogue and one record of stock and orders.
- What we do
- Nine specialists built website, mobile app and ERP on one connected foundation in two-week sprints.
3 months
Read the case study →Free integration scoping call
List the systems to connect. We outline approach, risks and price band.
- Integration map
- Risks
- Timeline
We agree targets before we start.
Every engagement has a baseline and a target on the measures that matter to you, reported at every read-out.
API Integration Services questions.
Which systems?
ERP, CRM, payments, GST, logistics and more.
Legacy?
API layer over legacy systems.
Timeline?
Discovery in 1 to 2 weeks.
Monitoring?
Included.
Pricing?
Fixed price after discovery.
Ownership?
You own the integrations.
Let's scope your API Integration Services project.
Tell us where you are and where you want to be. A senior specialist will reply within one business day with next steps.
- Free 30-minute consultation
- Indicative estimate after the call
- NDA available on request