Polygon

polygon · Finance

Finance No Auth Free & Open financial

The future of fintech.

Authentication

No authentication requiredFree to use with no key needed.

Sample Requests

GET Available Companies

Get a list of the traded companies that polygon.io streams. Company includes some details about the company which we hope to add more to soon.

https://api.apis.guru/v2/specs/polygon.io/1.0.0/v1/companies?page=1&sort=desc&perpage=1

Hover any highlighted part to learn what it does

curl -X GET "https://api.apis.guru/v2/specs/polygon.io/1.0.0/v1/companies?page=1&sort=desc&perpage=1"

import requests
params = {
    "page": "1",
    "sort": "desc",
    "perpage": "1"
}
response = requests.get(
    "https://api.apis.guru/v2/specs/polygon.io/1.0.0/v1/companies",
    params=params,
)
print(response.json())

const url = new URL('https://api.apis.guru/v2/specs/polygon.io/1.0.0/v1/companies');
url.searchParams.set('page', '1');
url.searchParams.set('sort', 'desc');
url.searchParams.set('perpage', '1');

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/polygon.io/1.0.0/v1/companies")
	q := baseURL.Query()
	q.Set("page", "1")
	q.Set("sort", "desc")
	q.Set("perpage", "1")
	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/polygon.io/1.0.0/v1/companies")
uri.query = URI.encode_www_form({
  "page" => "1",
  "sort" => "desc",
  "perpage" => "1"
})

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/polygon.io/1.0.0/v1/companies?" . http_build_query([
    "page" => "1",
    "sort" => "desc",
    "perpage" => "1"
]);
$opts = ["http" => [
    "method" => "GET",
]];
$ctx = stream_context_create($opts);
$res = file_get_contents($url, false, $ctx);
print_r(json_decode($res, true));

GET Available Currencies

Get a list of the currencies that polygon.io streams.

https://api.apis.guru/v2/specs/polygon.io/1.0.0/v1/currencies

Hover any highlighted part to learn what it does

curl -X GET "https://api.apis.guru/v2/specs/polygon.io/1.0.0/v1/currencies"

import requests
response = requests.get(
    "https://api.apis.guru/v2/specs/polygon.io/1.0.0/v1/currencies",
)
print(response.json())

const url = 'https://api.apis.guru/v2/specs/polygon.io/1.0.0/v1/currencies';

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/polygon.io/1.0.0/v1/currencies"
	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/polygon.io/1.0.0/v1/currencies")

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/polygon.io/1.0.0/v1/currencies";
$opts = ["http" => [
    "method" => "GET",
]];
$ctx = stream_context_create($opts);
$res = file_get_contents($url, false, $ctx);
print_r(json_decode($res, true));

GET Last Trade for a Symbol

Get the last trade for a given stock.

https://api.apis.guru/v2/specs/polygon.io/1.0.0/v1/last/stocks/{symbol}

Hover any highlighted part to learn what it does

curl -X GET "https://api.apis.guru/v2/specs/polygon.io/1.0.0/v1/last/stocks/{symbol}"

import requests
response = requests.get(
    "https://api.apis.guru/v2/specs/polygon.io/1.0.0/v1/last/stocks/{symbol}",
)
print(response.json())

const url = 'https://api.apis.guru/v2/specs/polygon.io/1.0.0/v1/last/stocks/{symbol}';

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/polygon.io/1.0.0/v1/last/stocks/{symbol}"
	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/polygon.io/1.0.0/v1/last/stocks/{symbol}")

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/polygon.io/1.0.0/v1/last/stocks/{symbol}";
$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 Polygon?

Polygon is a Finance API. Developers commonly use finance APIs for:

processing payments and handling transactions
building subscription and billing systems
automating invoicing and financial reporting
fraud detection and risk scoring
connecting to banking and accounting software

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

New to APIs? Read our beginner's guide

Open documentation ↗