ThingSpeak API

api.thingspeak.com · Developer Tools

Developer Tools API Key Free Tier IoT Sensors Data Logging

IoT analytics platform by MathWorks — store, visualize, and analyze IoT sensor data in real time. Free tier: up to 3M messages/year, 3-second update interval.

Authentication

API Key Channel-specific read/write API keys from thingspeak.mathworks.com. Public channels can be read without a key.

Sample Requests

GET Read channel data

Read the last 5 entries from public channel 9 (wind speed data).

https://api.thingspeak.com/channels/9/feeds.json?results=5

Hover any highlighted part to learn what it does

curl -X GET "https://api.thingspeak.com/channels/9/feeds.json?results=5"

import requests
params = {
    "results": "5"
}
response = requests.get(
    "https://api.thingspeak.com/channels/9/feeds.json",
    params=params,
)
print(response.json())

const url = new URL('https://api.thingspeak.com/channels/9/feeds.json');
url.searchParams.set('results', '5');

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.thingspeak.com/channels/9/feeds.json")
	q := baseURL.Query()
	q.Set("results", "5")
	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.thingspeak.com/channels/9/feeds.json")
uri.query = URI.encode_www_form({
  "results" => "5"
})

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.thingspeak.com/channels/9/feeds.json?" . http_build_query([
    "results" => "5"
]);
$opts = ["http" => [
    "method" => "GET",
]];
$ctx = stream_context_create($opts);
$res = file_get_contents($url, false, $ctx);
print_r(json_decode($res, true));

GET Write sensor data

Write temperature and humidity readings to your channel.

https://api.thingspeak.com/update?field1=23.5&field2=65&api_key=YOUR_WRITE_KEY

Hover any highlighted part to learn what it does

curl -X GET "https://api.thingspeak.com/update?field1=23.5&field2=65&api_key=YOUR_WRITE_KEY"

import requests
params = {
    "field1": "23.5",
    "field2": "65",
    "api_key": "YOUR_WRITE_KEY"
}
response = requests.get(
    "https://api.thingspeak.com/update",
    params=params,
)
print(response.json())

const url = new URL('https://api.thingspeak.com/update');
url.searchParams.set('field1', '23.5');
url.searchParams.set('field2', '65');
url.searchParams.set('api_key', 'YOUR_WRITE_KEY');

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.thingspeak.com/update")
	q := baseURL.Query()
	q.Set("field1", "23.5")
	q.Set("field2", "65")
	q.Set("api_key", "YOUR_WRITE_KEY")
	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.thingspeak.com/update")
uri.query = URI.encode_www_form({
  "field1" => "23.5",
  "field2" => "65",
  "api_key" => "YOUR_WRITE_KEY"
})

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.thingspeak.com/update?" . http_build_query([
    "field1" => "23.5",
    "field2" => "65",
    "api_key" => "YOUR_WRITE_KEY"
]);
$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 ↗

Create a free account at thingspeak.mathworks.com
Create a channel and get your Write API Key
Write: GET /update?api_key=YOUR_KEY&field1=VALUE
Read: GET /channels/{id}/feeds.json?results=10
Public channels need no key to read

Open documentation ↗