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APIs & Integrations Fixed scope

REST API Design and Documentation

A versioned API contract with OpenAPI documentation, worked examples and a mock server partners can build against immediately.

Timeline
9 working days
Price
₹18,999 incl. GST
Reference
NP-API-101
Ownership
Delivered into accounts you own

Overview

What this engagement is

Partners integrate far faster when they are not left to reverse-engineer your endpoints. We design or document your API with rigour: consistent resource naming, predictable pagination and filtering, error responses that identify the offending field, and a versioning approach that allows future change without breaking integrations. The OpenAPI specification is published with an interactive console and a mock server, so external developers can build and test their side before your implementation is complete.

Deliverables

What you receive

7 items
  • OpenAPI 3 specification covering up to 40 endpoints
  • Consistent conventions for pagination, filtering, sorting and errors
  • Published documentation site with request and response examples
  • Mock server generated from the specification for partner testing
  • Authentication guide covering keys, tokens and rate limits
  • Written versioning and deprecation policy
  • Ready-to-run API request collection for your support and partner teams

Outcomes

What changes once it ships

Partners integrate without a long chain of clarifying emails

Front-end development begins against a mock rather than waiting

Breaking changes become planned events rather than incidents

Process

How the 4 stages run

  1. Review

    Existing endpoints are examined, or requirements gathered for a new API

  2. Design

    Conventions, resources and the error model are agreed with your engineers

  3. Specify

    The OpenAPI document is written, examples added and the mock server generated

  4. Publish

    Documentation is deployed and walked through with your team

A strong fit for

  • Organisations whose API documentation lives in a spreadsheet
  • Products opening up to partner or customer integrations
  • Teams where front-end and back-end repeatedly disagree about payloads

What we need from you

  • Access to the codebase or the current list of endpoints
  • An engineer available for two design discussions
  • Any partner requirements or contractual constraints on the interface

You share these through the brief that opens in your client dashboard once payment is confirmed. The timeline starts when they arrive.

Answers

Questions about this engagement

Yes. Reading an unfamiliar codebase and capturing its contract is central to this work.
Implementation is separate, although small inconsistencies found along the way are often corrected by agreement.
Yes, with an equivalent schema, documentation and example queries, at the same price.

This is a digital service — nothing is shipped. Work is delivered to the timeline above, into systems you control, and our refund terms explain what happens if a date is missed.

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Engagements that work well alongside.

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