BioLink API

monarchinitiative · Data

Data No Auth Free & Open open_data

API integration layer for linked biological objects. __Source:__ https://github.com/biolink/biolink-api/

Authentication

No authentication requiredFree to use with no key needed.

Sample Requests

GET Returns compact associations for a given input set

Returns compact associations for a given input set

https://api.apis.guru/v2/specs/monarchinitiative.org/1.1.14/bioentityset/associations?subject=example&background=example&object_slim=example&object_category=example

Hover any highlighted part to learn what it does

curl -X GET "https://api.apis.guru/v2/specs/monarchinitiative.org/1.1.14/bioentityset/associations?subject=example&background=example&object_slim=example&object_category=example"

import requests
params = {
    "subject": "example",
    "background": "example",
    "object_slim": "example",
    "object_category": "example"
}
response = requests.get(
    "https://api.apis.guru/v2/specs/monarchinitiative.org/1.1.14/bioentityset/associations",
    params=params,
)
print(response.json())

const url = new URL('https://api.apis.guru/v2/specs/monarchinitiative.org/1.1.14/bioentityset/associations');
url.searchParams.set('subject', 'example');
url.searchParams.set('background', 'example');
url.searchParams.set('object_slim', 'example');
url.searchParams.set('object_category', 'example');

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

package main

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

func main() {
	baseURL, _ := url.Parse("https://api.apis.guru/v2/specs/monarchinitiative.org/1.1.14/bioentityset/associations")
	q := baseURL.Query()
	q.Set("subject", "example")
	q.Set("background", "example")
	q.Set("object_slim", "example")
	q.Set("object_category", "example")
	baseURL.RawQuery = q.Encode()
	targetURL := baseURL.String()
	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/monarchinitiative.org/1.1.14/bioentityset/associations")
uri.query = URI.encode_www_form({
  "subject" => "example",
  "background" => "example",
  "object_slim" => "example",
  "object_category" => "example"
})

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/monarchinitiative.org/1.1.14/bioentityset/associations?" . http_build_query([
    "subject" => "example",
    "background" => "example",
    "object_slim" => "example",
    "object_category" => "example"
]);
$opts = ["http" => [
    "method" => "GET",
]];
$ctx = stream_context_create($opts);
$res = file_get_contents($url, false, $ctx);
print_r(json_decode($res, true));

GET TODO Graph object spanning all entities

TODO Graph object spanning all entities

https://api.apis.guru/v2/specs/monarchinitiative.org/1.1.14/bioentityset/graph?subject=example&background=example&object_slim=example&object_category=example

Hover any highlighted part to learn what it does

curl -X GET "https://api.apis.guru/v2/specs/monarchinitiative.org/1.1.14/bioentityset/graph?subject=example&background=example&object_slim=example&object_category=example"

import requests
params = {
    "subject": "example",
    "background": "example",
    "object_slim": "example",
    "object_category": "example"
}
response = requests.get(
    "https://api.apis.guru/v2/specs/monarchinitiative.org/1.1.14/bioentityset/graph",
    params=params,
)
print(response.json())

const url = new URL('https://api.apis.guru/v2/specs/monarchinitiative.org/1.1.14/bioentityset/graph');
url.searchParams.set('subject', 'example');
url.searchParams.set('background', 'example');
url.searchParams.set('object_slim', 'example');
url.searchParams.set('object_category', 'example');

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

package main

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

func main() {
	baseURL, _ := url.Parse("https://api.apis.guru/v2/specs/monarchinitiative.org/1.1.14/bioentityset/graph")
	q := baseURL.Query()
	q.Set("subject", "example")
	q.Set("background", "example")
	q.Set("object_slim", "example")
	q.Set("object_category", "example")
	baseURL.RawQuery = q.Encode()
	targetURL := baseURL.String()
	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/monarchinitiative.org/1.1.14/bioentityset/graph")
uri.query = URI.encode_www_form({
  "subject" => "example",
  "background" => "example",
  "object_slim" => "example",
  "object_category" => "example"
})

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/monarchinitiative.org/1.1.14/bioentityset/graph?" . http_build_query([
    "subject" => "example",
    "background" => "example",
    "object_slim" => "example",
    "object_category" => "example"
]);
$opts = ["http" => [
    "method" => "GET",
]];
$ctx = stream_context_create($opts);
$res = file_get_contents($url, false, $ctx);
print_r(json_decode($res, true));

GET Returns homology associations for a given input set of genes

Returns homology associations for a given input set of genes

https://api.apis.guru/v2/specs/monarchinitiative.org/1.1.14/bioentityset/homologs?subject=example

Hover any highlighted part to learn what it does

curl -X GET "https://api.apis.guru/v2/specs/monarchinitiative.org/1.1.14/bioentityset/homologs/?subject=example"

import requests
params = {
    "subject": "example"
}
response = requests.get(
    "https://api.apis.guru/v2/specs/monarchinitiative.org/1.1.14/bioentityset/homologs/",
    params=params,
)
print(response.json())

const url = new URL('https://api.apis.guru/v2/specs/monarchinitiative.org/1.1.14/bioentityset/homologs/');
url.searchParams.set('subject', 'example');

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

package main

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

func main() {
	baseURL, _ := url.Parse("https://api.apis.guru/v2/specs/monarchinitiative.org/1.1.14/bioentityset/homologs/")
	q := baseURL.Query()
	q.Set("subject", "example")
	baseURL.RawQuery = q.Encode()
	targetURL := baseURL.String()
	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/monarchinitiative.org/1.1.14/bioentityset/homologs/")
uri.query = URI.encode_www_form({
  "subject" => "example"
})

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/monarchinitiative.org/1.1.14/bioentityset/homologs/?" . http_build_query([
    "subject" => "example"
]);
$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 BioLink API?

BioLink API 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. BioLink API is free to use, making it a low-risk choice to experiment with.

New to APIs? Read our beginner's guide

Open documentation ↗