Integration Engineering
UPI and Card Payments Setup
End-to-end payment handling for UPI, wallets, netbanking and cards, with verified webhook signatures and a daily settlement reconciliation you can trust.
Fixed price · GST incl.₹26,999
Integration Engineering
Partner-Ready API Reference
A versioned API contract with published documentation, worked samples and a mock server, so partners can begin building within the same week.
9 working days₹20,999 incl. GST7 deliverables
What this service covers
Partners integrate faster when they do not have to reverse-engineer your API. Whether we design a new interface or document an existing one, we keep resource names consistent, make paging and filtering predictable, ensure error responses point to the exact field, and choose a versioning approach that allows future change. Up to 40 endpoints are described in a machine-readable specification, published with a browsable console and a mock server generated from it. Authentication, rate limits and deprecation are documented too. A precise contract also helps AI coding assistants produce correct integration code.
What you receive
- A machine-readable API specification covering up to 40 endpoints
- Agreed rules for how paging, filtering, sorting and errors behave
- A documentation site with worked request and response samples
- A mock server generated from the specification for partner testing
- An authentication guide explaining keys, tokens and rate limits
- A written versioning and endpoint deprecation policy
- A ready-made set of sample requests for partners and support staff
The work in 4 stages
-
Stage 1: Examine
We inspect current endpoints, or collect requirements for a new API.
-
Stage 2: Agree conventions
Resources, naming and the error model are settled with your developers.
-
Stage 3: Write the contract
The specification is drafted, examples added and the mock generated.
-
Stage 4: Go public
Documentation is published and we take your team through it.
Who it suits, and what we need from you
Ideal for
- Businesses whose API documentation lives in a spreadsheet
- Products starting to offer access to partners or customers
- Client and server developers who argue over payload formats
What we need from you
- Access to the code, or a list of current endpoints
- An engineer free for two design discussions
- Any partner or contractual requirements the API must meet
You share these through the brief on your order page after checkout.
What changes for your team
- Partners integrate without long email threads of questions
- Client-side work starts immediately against the mock server
- Breaking changes are planned releases, not emergencies
Questions about this service
Yes. Reading unfamiliar code and writing up its contract is central to this service.
Implementation is scoped separately, although minor inconsistencies we spot can be corrected if you agree.
Yes, with an equivalent schema, documentation and sample queries, at the same price.
This is a remote service: nothing is shipped physically, and the work is delivered into systems you control. See delivery and handover and refunds and cancellation for the full terms.