APIs.guru

apis · Data

Data No Auth Free & Open open_data developer_tools

Wikipedia for Web APIs. Repository of API definitions in OpenAPI format. **Warning**: If you want to be notified about changes in advance please join our [Slack channel](https://join.slack.com/t/mermade/shared_invite/zt-g78g7xir-MLE_CTCcXCdfJfG3CJe9qA). Client sample: [[Demo]](https://apis.guru/simple-ui) [[Repo]](https://github.com/APIs-guru/simple-ui)

Authentication

No authentication requiredFree to use with no key needed.

Sample Requests

GET List all APIs

List all APIs in the directory. Returns links to the OpenAPI definitions for each API in the directory. If API exist in multiple versions `preferred` one is explicitly marked. Some basic info from the OpenAPI definition is cached inside each object. This allows you to generate some simple views with

https://api.apis.guru/v2/specs/apis.guru/2.2.0/list.json

Hover any highlighted part to learn what it does

curl -X GET "https://api.apis.guru/v2/specs/apis.guru/2.2.0/list.json"

import requests
response = requests.get(
    "https://api.apis.guru/v2/specs/apis.guru/2.2.0/list.json",
)
print(response.json())

const url = 'https://api.apis.guru/v2/specs/apis.guru/2.2.0/list.json';

const response = await fetch(url); 
const data = await response.json();
console.log(data);

package main

import (
	"fmt"
	"io"
	"net/http"
)

func main() {
	targetURL := "https://api.apis.guru/v2/specs/apis.guru/2.2.0/list.json"
	req, _ := http.NewRequest("GET", targetURL, nil)

	client := &http.Client{}
	resp, _ := client.Do(req)
	defer resp.Body.Close()
	body, _ := io.ReadAll(resp.Body)
	fmt.Println(string(body))
}

require "net/http"
require "json"

uri = URI("https://api.apis.guru/v2/specs/apis.guru/2.2.0/list.json")

http = Net::HTTP.new(uri.host, uri.port)
http.use_ssl = uri.scheme == "https"

req = Net::HTTP::Get.new(uri)

res = http.request(req)
puts JSON.parse(res.body)

<?php
$url = "https://api.apis.guru/v2/specs/apis.guru/2.2.0/list.json";
$opts = ["http" => [
    "method" => "GET",
]];
$ctx = stream_context_create($opts);
$res = file_get_contents($url, false, $ctx);
print_r(json_decode($res, true));

GET Get basic metrics

Some basic metrics for the entire directory. Just stunning numbers to put on a front page and are intended purely for WoW effect :)

https://api.apis.guru/v2/specs/apis.guru/2.2.0/metrics.json

Hover any highlighted part to learn what it does

curl -X GET "https://api.apis.guru/v2/specs/apis.guru/2.2.0/metrics.json"

import requests
response = requests.get(
    "https://api.apis.guru/v2/specs/apis.guru/2.2.0/metrics.json",
)
print(response.json())

const url = 'https://api.apis.guru/v2/specs/apis.guru/2.2.0/metrics.json';

const response = await fetch(url); 
const data = await response.json();
console.log(data);

package main

import (
	"fmt"
	"io"
	"net/http"
)

func main() {
	targetURL := "https://api.apis.guru/v2/specs/apis.guru/2.2.0/metrics.json"
	req, _ := http.NewRequest("GET", targetURL, nil)

	client := &http.Client{}
	resp, _ := client.Do(req)
	defer resp.Body.Close()
	body, _ := io.ReadAll(resp.Body)
	fmt.Println(string(body))
}

require "net/http"
require "json"

uri = URI("https://api.apis.guru/v2/specs/apis.guru/2.2.0/metrics.json")

http = Net::HTTP.new(uri.host, uri.port)
http.use_ssl = uri.scheme == "https"

req = Net::HTTP::Get.new(uri)

res = http.request(req)
puts JSON.parse(res.body)

<?php
$url = "https://api.apis.guru/v2/specs/apis.guru/2.2.0/metrics.json";
$opts = ["http" => [
    "method" => "GET",
]];
$ctx = stream_context_create($opts);
$res = file_get_contents($url, false, $ctx);
print_r(json_decode($res, true));

GET List all providers

List all the providers in the directory

https://api.apis.guru/v2/specs/apis.guru/2.2.0/providers.json

Hover any highlighted part to learn what it does

curl -X GET "https://api.apis.guru/v2/specs/apis.guru/2.2.0/providers.json"

import requests
response = requests.get(
    "https://api.apis.guru/v2/specs/apis.guru/2.2.0/providers.json",
)
print(response.json())

const url = 'https://api.apis.guru/v2/specs/apis.guru/2.2.0/providers.json';

const response = await fetch(url); 
const data = await response.json();
console.log(data);

package main

import (
	"fmt"
	"io"
	"net/http"
)

func main() {
	targetURL := "https://api.apis.guru/v2/specs/apis.guru/2.2.0/providers.json"
	req, _ := http.NewRequest("GET", targetURL, nil)

	client := &http.Client{}
	resp, _ := client.Do(req)
	defer resp.Body.Close()
	body, _ := io.ReadAll(resp.Body)
	fmt.Println(string(body))
}

require "net/http"
require "json"

uri = URI("https://api.apis.guru/v2/specs/apis.guru/2.2.0/providers.json")

http = Net::HTTP.new(uri.host, uri.port)
http.use_ssl = uri.scheme == "https"

req = Net::HTTP::Get.new(uri)

res = http.request(req)
puts JSON.parse(res.body)

<?php
$url = "https://api.apis.guru/v2/specs/apis.guru/2.2.0/providers.json";
$opts = ["http" => [
    "method" => "GET",
]];
$ctx = stream_context_create($opts);
$res = file_get_contents($url, false, $ctx);
print_r(json_decode($res, true));

Postman Setup Guide

Get Postman ↗

See official documentation for authentication and setup.

What can you build with APIs.guru?

APIs.guru is a Data API. Developers commonly use data APIs for:

enriching your app with third-party datasets
building data pipelines and ETL workflows
querying and searching large datasets
powering research, analysis, and reporting tools
syncing reference data into your own systems

No authentication required. This API is open — no signup or key needed. Ideal for quick prototypes and public-facing features. APIs.guru is free to use, making it a low-risk choice to experiment with.

New to APIs? Read our beginner's guide · Learn about API keys · What is REST?

Open documentation ↗