Implement subscription comprehensive API documentation

[Smartdevs17]

Implement subscription comprehensive API documentation

Description

Context: Developers need comprehensive API documentation.

Current Limitation: Basic docs exist.

Expected Outcome: Implement OpenAPI documentation.

Acceptance Criteria

• Implement OpenAPI specification
• Add interactive API explorer
• Include code examples in multiple languages
• Add authentication documentation
• Document error codes
• Implement API versioning

Technical Scope

Files Likely Affected:

• docs/api/openapi.yaml - OpenAPI spec
• docs/api/ - API documentation

[beebozy]

@beebozy has applied to work on this issue as part of the Stellar Wave Program's 4th wave.

Hi Maintainer,
Ihave experience writing OpenAPI/Swagger specs, documenting endpoints, and defining request/response schemas. Kindly assign me

ℹ️ Repo Maintainers: To accept this application, review their application or assign @beebozy to this issue.

[soyaya]

@soyaya has applied to work on this issue as part of the Stellar Wave Program's 4th wave.

I would like to work on this issue because clear API documentation drives adoption and reduces integration errors, especially for subscription systems where flows like billing, renewals, and cancellations must be precise.

I have experience documenting APIs alongside backend development, including structuring endpoints, request and response formats, and edge cases. I focus on clarity, completeness, and making docs easy for developers to use without extra support.

I will deliver well-structured documentation covering all endpoints, parameters, examples, and error cases, with a focus on real usage flows and consistency across the API.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @soyaya to this issue.

[drips-wave]

Congratulations, @beebozy! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on April 29, 2026.

🧑‍💻 @beebozy: Please resolve the issue such that the repo's maintainers have enough time to review your contribution before the due date. You'll earn Points for completing the issue on-time, which will make you eligible for a share of the Stellar Wave Program's reward pool.

Warning

When opening a PR, please link it to this issue to ensure it gets tracked accurately. Points are awarded when this issue is marked as completed by the maintainer.

🤠 Repo maintainers: Please keep an eye on the contributor's progress and review their work before the due date. You can manage this issue, including adjusting its complexity and points, here.

🌊 Happy Wave 🌊