APIs.guru API
Overview
APIs.guru maintains a crowd-sourced directory of OpenAPI (Swagger) specification files for hundreds of public web APIs, all normalized to OpenAPI 3.0 format. The API lets you fetch a full machine-readable catalog of API specs that you can use to auto-generate client SDKs, documentation, or test harnesses. It is often called the "Wikipedia for APIs" and is a go-to resource for API tooling and discovery.
Beginner Tip
No API key is required — start by calling https://api.apis.guru/v2/list.json to get the full catalog as a JSON object keyed by provider domain. Each provider entry links to the actual OpenAPI spec URL which you can then fetch and parse with any OpenAPI library.
Available Data
Example Response
{
"status": "success",
"data": {
"result": "Data from APIs.guru",
"description": "Wikipedia for Web APIs, OpenAPI/Swagger specs for public APIs",
"timestamp": "2025-01-15T10:00:00Z"
}
} Field Reference
{provider}.apis.{version}.info.title Human-readable title of the API at this version. {provider}.apis.{version}.info.version Version string of the API spec. {provider}.apis.{version}.swaggerUrl Direct URL to the OpenAPI JSON spec file for this version. {provider}.apis.{version}.updated ISO 8601 timestamp when this spec was last updated in the catalog. {provider}.preferred Version string of the recommended version to use for this provider. Implementation Example
const url = "https://apis.guru/api-doc/";
const response = await fetch(url);
if (!response.ok) throw new Error(`Request failed: ${response.status}`);
const data = await response.json();
console.log(data); What Can You Build?
Note: These code examples are AI-generated and unverified. Always refer to the official API documentation for accurate usage.
Common Errors & Troubleshooting
Matrix Score Breakdown
Fully tested on Apr 5, 2026
Technical Specifications
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