Skip to content

New: Starter plans from ₹100 — fixed-price checks and reviews, GST included

REST API Design and Documentation

A versioned API contract with OpenAPI docs, worked examples and a mock server your partners can build against today.

Price incl. GST
₹18,999
Timeline
9 working days
Deliverables
7 listed below

Overview

About this service

Partners integrate faster when they are not reverse-engineering your endpoints. We design or document your API properly: consistent resource naming, predictable pagination and filtering, error responses that name the field at fault, and versioning that lets you change things later without breaking anyone. The OpenAPI specification is published with a browsable console and a mock server, so an external developer can write and test their side before your implementation is even finished.

Deliverables

What you receive

7 items
  1. 01 OpenAPI 3 specification covering up to 40 endpoints
  2. 02 Consistent conventions for pagination, filtering, sorting and errors
  3. 03 Published documentation site with request and response examples
  4. 04 Mock server generated from the specification for partner testing
  5. 05 Authentication guide covering keys, tokens and rate limits
  6. 06 Versioning and deprecation policy in writing
  7. 07 Postman collection for your support and partner teams

Benefits

Why it is worth doing

  • Partners integrate without a series of clarifying emails

  • Front-end work starts against a mock instead of waiting

  • Breaking changes become a planned event rather than incident

Process

How the work is carried out

  1. 1

    Review

    Existing endpoints inspected, or requirements gathered if new

  2. 2

    Design

    Conventions, resources and the error model agreed with your engineers

  3. 3

    Specify

    OpenAPI written, examples added, mock server generated

  4. 4

    Publish

    Documentation deployed and walked through with your team

Best suited to

  • Companies whose API documentation lives in a spreadsheet
  • Products opening up to partner or customer integrations
  • Teams whose front-end and back-end keep disagreeing about payloads

What we need from you

  • Access to the codebase or existing endpoint list
  • An engineer available for two design conversations
  • Any partner requirements or contractual constraints on the interface

You can share these from your order page after checkout. The timeline starts once they are received.

FAQ

Questions about this service

Yes. Reading an unfamiliar codebase and writing the contract is a large part of this work.

Implementation is separate, though we often find small inconsistencies and fix them by agreement.

We do the equivalent with a schema, documentation and example queries. Same price.

Have a question before you order?

Tell us about your project and we will confirm whether this service fits, or suggest a better option.

Ask about this service

This is a professional service delivered remotely; nothing is physically shipped. See the Delivery Policy and Refunds & Cancellation for how delivery, delays and refunds are handled.

Related services

You may also need

More in APIs & Integrations

Incl. GST

₹18,999

Next step

Have something to build, fix or modernise? Start with a conversation.

Pick a service with a published scope and price, start small with a plan from ₹100, or tell our team what you need.