Write API documentation for our payments API

Our payments has an OpenAPI file and some notes, but no real documentation, and customers keep asking the same setup questions. I need a quickstart, authentication guide, endpoint reference with examples in curl and two languages, error handling, and changelog format. I can give access to engineers for questions. Support spends hours each week answering integration questions. ### Key Deliverables: - **Outline & First Draft**: Agreeing the structure with the team and delivering a first draft for review. - **Review Round & Final Document**: Incorporating feedback, checking accuracy with the team, and delivering the final version. ### Requirements: - Demonstrated experience with Technical Writing, API Documentation, Markdown, OpenAPI - Async communication preferred with milestone check-ins. - Must match our existing brand voice and terminology. Looking to get started promptly. Please submit a proposal detailing your relevant past experience and expected timeline.

Category: Writing & Content

Skills Required: Technical WritingAPI DocumentationMarkdownOpenAPI

Budget Range: $280 - $400 USD

Experience Level: Intermediate

Related Developer Talent & Ecosystem Links:

Writing & Content Posted 11/10/2026

Write API documentation for our payments API

Project Deliverables & Description

Our payments has an OpenAPI file and some notes, but no real documentation, and customers keep asking the same setup questions. I need a quickstart, authentication guide, endpoint reference with examples in curl and two languages, error handling, and changelog format. I can give access to engineers for questions.

Support spends hours each week answering integration questions.

Key Deliverables:

  • Outline & First Draft: Agreeing the structure with the team and delivering a first draft for review.
  • Review Round & Final Document: Incorporating feedback, checking accuracy with the team, and delivering the final version.

Requirements:

  • Demonstrated experience with Technical Writing, API Documentation, Markdown, OpenAPI
  • Async communication preferred with milestone check-ins.
  • Must match our existing brand voice and terminology.

Looking to get started promptly. Please submit a proposal detailing your relevant past experience and expected timeline.

Sign In to Submit a Bid

Bidding is restricted to registered freelance users. Sign in to submit details, propose custom payment milestones, and lock funds in escrow.

Contract Parameters

Budget Setup

$280 - $400

fixed Rate Structure

Experience Level

Intermediate

Target expertise level requested

Project Scope

Intermediate

Target project delivery scope

Contract Identifier: 371b7b12

Professional Trust Score

ESCROW FUNDING SECURED$280 LOCKED

Client holds verified capital secured in project escrow holds.

Client Identity Verified

Corporate background confirmed

Escrow Lock Enforcement

Secure milestone hold verified

BotDigit Arbitrated

Arbitration protection active

HomeJobs
Get Started
ExploreSign In