---
title: "Publish APIs"
description: "Learn best practices for exposing, versioning, and managing your APIs to accelerate integration and developer adoption"
url: "https://seriousmonkeybusiness.shermett.me/guides/publish-apis"
image: "https://seriousmonkeybusiness.shermett.me/_og/d/c_Ocean.takumi,title_Publish+APIs,description_~TGVhcm4gYmVzdCBwcmFjdGljZXMgZm9yIGV4cG9zaW5nLCB2ZXJzaW9uaW5nLCBhbmQgbWFuYWdpbmcgeW91ciBBUElzIHRvIGFjY2VsZXJhdGUgaW50ZWdyYXRpb24gYW5kIGRldmVsb3BlciBhZG9wdGlvbg,props_eyJ0aGVtZSI6eyJtb2RlIjoibGlnaHQiLCJjb2xvcnMiOnsicHJpbWFyeSI6IiMwMDk5MzMifX19,p_Ii9ndWlkZXMvcHVibGlzaC1hcGlzIg,s_bTXqllrHZzoSvVGi.png"
---

# Publish APIs

Learn best practices for exposing, versioning, and managing your APIs to accelerate integration and developer adoption.

## [Getting Your API Production-Ready](#getting-your-api-production-ready)

Publishing an API is more than flipping a switch. It's about ensuring your API is discoverable, well-documented, secure, and reliable before developers start building on it. This guide covers the essential steps from internal prototype to public endpoint.

A production-ready API should meet three criteria: **it works reliably**, **it's easy to understand**, and **it scales with demand**. Let's walk through each.

Before you publish

Make sure your API has a complete OpenAPI specification, authentication configured, and rate limiting enabled. These are the minimum requirements for a production API.

### [Define Your API Contract](#define-your-api-contract)

Your OpenAPI (Swagger) specification is the single source of truth for your API. It defines every endpoint, parameter, request body, and response format. A well-written spec enables:

-   **Auto-generated documentation** that stays in sync with your code
-   **Client SDK generation** in any language
-   **Contract testing** to catch breaking changes before they ship
-   **Interactive exploration** via sandbox environments

```json
{
  "openapi": "3.0.3",
  "info": {
    "title": "Banana API",
    "version": "1.0.0",
    "description": "Manage and track banana inventory"
  },
  "paths": {
    "/v1/bananas": {
      "get": {
        "summary": "List all bananas",
        "operationId": "listBananas",
        "tags": ["Bananas"]
      }
    }
  }
}
```

### [Configure Authentication](#configure-authentication)

Every public API needs authentication. Choose the method that fits your use case and configure it before opening access to consumers.

-   **API Keys** — Fastest to implement. Best for server-to-server integrations where you trust the caller.
-   **OAuth 2.0** — Most flexible. Required when your API accesses user data on behalf of third parties.
-   **JWT Bearer** — Stateless and scalable. Ideal for microservices and internal APIs.

### [Set Rate Limits](#set-rate-limits)

Rate limiting protects your API from abuse and ensures fair usage across all consumers. Configure limits based on your capacity and the expected usage patterns of your consumers.

```bash
# Example: Check rate limit headers in a response
curl -I https://api.seriousmonkey.biz/v1/bananas \
  -H "Authorization: Bearer YOUR_API_KEY"

# Response headers:
# X-RateLimit-Limit: 1000
# X-RateLimit-Remaining: 997
# X-RateLimit-Reset: 1679616000
```

## [Managing Your Published APIs](#managing-your-published-apis)

Once your API is live, the work doesn't stop. Monitoring, versioning, and deprecation are all part of the lifecycle.

### [Monitor Usage and Health](#monitor-usage-and-health)

Track key metrics to understand how your API is performing and how developers are using it:

-   **Request volume** — How many calls per minute/hour/day
-   **Error rates** — Percentage of 4xx and 5xx responses
-   **Latency** — P50, P95, and P99 response times
-   **Consumer breakdown** — Which API keys are making the most calls

### [Plan for Versioning](#plan-for-versioning)

APIs evolve. New features get added, schemas change, and sometimes breaking changes are unavoidable. Having a versioning strategy from day one makes these transitions smooth.

**Pro Tip:** Use URL path versioning (`/v1/`, `/v2/`) for public APIs. It's the most explicit and widely adopted pattern. See our [API Versioning guide](https://seriousmonkeybusiness.shermett.me/guides/publish-apis/versioning) for a deep dive.

### [Deprecation and Sunset](#deprecation-and-sunset)

When it's time to retire an old version, communicate clearly and give consumers time to migrate:

1.  **Announce the deprecation** with at least 6 months notice
2.  **Add deprecation headers** to API responses so automated tools can detect it
3.  **Publish a migration guide** mapping old endpoints to new ones
4.  **Monitor usage** and reach out to consumers still on the old version
5.  **Sunset the version** only after all active consumers have migrated

Next steps

Ready to dive deeper into versioning? Check out our [API Versioning guide](https://seriousmonkeybusiness.shermett.me/guides/publish-apis/versioning) for strategies, lifecycle management, and best practices.