JSONBin.io

api.jsonbin.io · Developer Tools

Developer Tools API Key Free Tier JSON Storage Database Developer Tools

Free JSON storage and hosting — store, share, and retrieve JSON documents via REST API. Great for prototyping, storing config, or sharing data without a database. Free tier available.

Authentication

API Key Free API key at jsonbin.io. Pass as X-Master-Key or X-Access-Key header.

Sample Requests

POST Create a bin

Store a JSON document and get back a bin ID.

https://api.jsonbin.io/v3/b

Hover any highlighted part to learn what it does

Headers — extra info sent with the request

Content-Type	application/json
X-Master-Key	YOUR_KEY

Request Body — data you're sending

{
  "name": "John Doe",
  "email": "[email protected]"
}

curl -X POST "https://api.jsonbin.io/v3/b" \
  -H "Content-Type: application/json" \
  -H "X-Master-Key: YOUR_KEY" \
  -H "Content-Type: application/json" \
  -d '{"name":"John Doe","email":"[email protected]"}'

import requests
headers = {
    "Content-Type": "application/json",
    "X-Master-Key": "YOUR_KEY"
}
data = {
    "name": "John Doe",
    "email": "[email protected]"
}
response = requests.post(
    "https://api.jsonbin.io/v3/b",
    headers=headers,
    json=data,
)
print(response.json())

const url = 'https://api.jsonbin.io/v3/b';

const response = await fetch(url, {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
    'X-Master-Key': 'YOUR_KEY'
  },
  headers: { 'Content-Type': 'application/json' },
  body: JSON.stringify({
  "name": "John Doe",
  "email": "[email protected]"
}),
}); 
const data = await response.json();
console.log(data);

package main

import (
	"fmt"
	"io"
	"net/http"
	"bytes"
	"encoding/json"
)

func main() {
	targetURL := "https://api.jsonbin.io/v3/b"
	jsonData, _ := json.Marshal({"name":"John Doe","email":"[email protected]"})
	req, _ := http.NewRequest("POST", targetURL, bytes.NewBuffer(jsonData))
	req.Header.Set("Content-Type", "application/json")
	req.Header.Set("X-Master-Key", "YOUR_KEY")
	req.Header.Set("Content-Type", "application/json")

	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.jsonbin.io/v3/b")

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

req = Net::HTTP::Post.new(uri)
req["Content-Type"] = "application/json"
req["X-Master-Key"] = "YOUR_KEY"
req["Content-Type"] = "application/json"
req.body = "{\"name\":\"John Doe\",\"email\":\"[email protected]\"}"

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

<?php
$url = "https://api.jsonbin.io/v3/b";
$opts = ["http" => [
    "method" => "POST",
    "header" => implode("\r\n", [
        "Content-Type: application/json",
        "X-Master-Key: YOUR_KEY",
        "Content-Type: application/json"
    ]),
    "content" => json_encode({"name":"John Doe","email":"[email protected]"}),
]];
$ctx = stream_context_create($opts);
$res = file_get_contents($url, false, $ctx);
print_r(json_decode($res, true));

GET Read a bin

Retrieve a stored JSON document by ID.

https://api.jsonbin.io/v3/b/BIN_ID

Hover any highlighted part to learn what it does

Headers — extra info sent with the request

X-Master-Key

YOUR_KEY

curl -X GET "https://api.jsonbin.io/v3/b/BIN_ID" \
  -H "X-Master-Key: YOUR_KEY"

import requests
headers = {
    "X-Master-Key": "YOUR_KEY"
}
response = requests.get(
    "https://api.jsonbin.io/v3/b/BIN_ID",
    headers=headers,
)
print(response.json())

const url = 'https://api.jsonbin.io/v3/b/BIN_ID';

const response = await fetch(url, {
  headers: {
    'X-Master-Key': 'YOUR_KEY'
  },
}); 
const data = await response.json();
console.log(data);

package main

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

func main() {
	targetURL := "https://api.jsonbin.io/v3/b/BIN_ID"
	req, _ := http.NewRequest("GET", targetURL, nil)
	req.Header.Set("X-Master-Key", "YOUR_KEY")

	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.jsonbin.io/v3/b/BIN_ID")

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

req = Net::HTTP::Get.new(uri)
req["X-Master-Key"] = "YOUR_KEY"

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

<?php
$url = "https://api.jsonbin.io/v3/b/BIN_ID";
$opts = ["http" => [
    "method" => "GET",
    "header" => implode("\r\n", [
        "X-Master-Key: YOUR_KEY"
    ]),
]];
$ctx = stream_context_create($opts);
$res = file_get_contents($url, false, $ctx);
print_r(json_decode($res, true));

Postman Setup Guide

Get Postman ↗

Sign up at jsonbin.io for a free API key
Create bin: POST /v3/b with JSON body and X-Master-Key header
Read bin: GET /v3/b/{binId}
Update bin: PUT /v3/b/{binId} with new JSON body
Public bins: share the bin URL — anyone can read without auth

Open documentation ↗