Chaingateway.io

chaingateway · Finance

Finance No Auth Free & Open financial

# Chaingateway.io REST API to build the bridge between Ethereum and the real world Please check out our [website](https://chaingateway.io?utm_source=postman) for detailed information about this API. To use our API, you need an API Key (Described as Authorization header in the examples below). To get one, please create an account on our [website](https://chaingateway.io/register?utm_source=postman). For our internal documentation, please check out our [Docs Site](https://chaingateway.io/docs?

Authentication

No authentication requiredFree to use with no key needed.

Sample Requests

POST clearAddress

Sends all available ethereum funds of an address to a specified receiver address.

https://api.apis.guru/v2/specs/chaingateway.io/1.0/clearAddress

Hover any highlighted part to learn what it does

Headers — extra info sent with the request

Authorization

q9PdaWuD4j6DK6vsUgehhL8pgarSrS9m

curl -X POST "https://api.apis.guru/v2/specs/chaingateway.io/1.0/clearAddress" \
  -H "Authorization: q9PdaWuD4j6DK6vsUgehhL8pgarSrS9m"

import requests
headers = {
    "Authorization": "q9PdaWuD4j6DK6vsUgehhL8pgarSrS9m"
}
response = requests.post(
    "https://api.apis.guru/v2/specs/chaingateway.io/1.0/clearAddress",
    headers=headers,
)
print(response.json())

const url = 'https://api.apis.guru/v2/specs/chaingateway.io/1.0/clearAddress';

const response = await fetch(url, {
  method: 'POST',
  headers: {
    'Authorization': 'q9PdaWuD4j6DK6vsUgehhL8pgarSrS9m'
  },
}); 
const data = await response.json();
console.log(data);

package main

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

func main() {
	targetURL := "https://api.apis.guru/v2/specs/chaingateway.io/1.0/clearAddress"
	req, _ := http.NewRequest("POST", targetURL, nil)
	req.Header.Set("Authorization", "q9PdaWuD4j6DK6vsUgehhL8pgarSrS9m")

	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/chaingateway.io/1.0/clearAddress")

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

req = Net::HTTP::Post.new(uri)
req["Authorization"] = "q9PdaWuD4j6DK6vsUgehhL8pgarSrS9m"

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

<?php
$url = "https://api.apis.guru/v2/specs/chaingateway.io/1.0/clearAddress";
$opts = ["http" => [
    "method" => "POST",
    "header" => implode("\r\n", [
        "Authorization: q9PdaWuD4j6DK6vsUgehhL8pgarSrS9m"
    ]),
]];
$ctx = stream_context_create($opts);
$res = file_get_contents($url, false, $ctx);
print_r(json_decode($res, true));

POST deleteAddress

Deletes an existing ethereum address. Be careful when using this function.

https://api.apis.guru/v2/specs/chaingateway.io/1.0/deleteAddress

Hover any highlighted part to learn what it does

Headers — extra info sent with the request

Authorization

q9PdaWuD4j6DK6vsUgehhL8pgarSrS9m

curl -X POST "https://api.apis.guru/v2/specs/chaingateway.io/1.0/deleteAddress" \
  -H "Authorization: q9PdaWuD4j6DK6vsUgehhL8pgarSrS9m"

import requests
headers = {
    "Authorization": "q9PdaWuD4j6DK6vsUgehhL8pgarSrS9m"
}
response = requests.post(
    "https://api.apis.guru/v2/specs/chaingateway.io/1.0/deleteAddress",
    headers=headers,
)
print(response.json())

const url = 'https://api.apis.guru/v2/specs/chaingateway.io/1.0/deleteAddress';

const response = await fetch(url, {
  method: 'POST',
  headers: {
    'Authorization': 'q9PdaWuD4j6DK6vsUgehhL8pgarSrS9m'
  },
}); 
const data = await response.json();
console.log(data);

package main

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

func main() {
	targetURL := "https://api.apis.guru/v2/specs/chaingateway.io/1.0/deleteAddress"
	req, _ := http.NewRequest("POST", targetURL, nil)
	req.Header.Set("Authorization", "q9PdaWuD4j6DK6vsUgehhL8pgarSrS9m")

	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/chaingateway.io/1.0/deleteAddress")

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

req = Net::HTTP::Post.new(uri)
req["Authorization"] = "q9PdaWuD4j6DK6vsUgehhL8pgarSrS9m"

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

<?php
$url = "https://api.apis.guru/v2/specs/chaingateway.io/1.0/deleteAddress";
$opts = ["http" => [
    "method" => "POST",
    "header" => implode("\r\n", [
        "Authorization: q9PdaWuD4j6DK6vsUgehhL8pgarSrS9m"
    ]),
]];
$ctx = stream_context_create($opts);
$res = file_get_contents($url, false, $ctx);
print_r(json_decode($res, true));

POST exportAddress

Returns all ethereum addresses created with an account.

https://api.apis.guru/v2/specs/chaingateway.io/1.0/exportAddress

Hover any highlighted part to learn what it does

Headers — extra info sent with the request

Authorization

q9PdaWuD4j6DK6vsUgehhL8pgarSrS9m

curl -X POST "https://api.apis.guru/v2/specs/chaingateway.io/1.0/exportAddress" \
  -H "Authorization: q9PdaWuD4j6DK6vsUgehhL8pgarSrS9m"

import requests
headers = {
    "Authorization": "q9PdaWuD4j6DK6vsUgehhL8pgarSrS9m"
}
response = requests.post(
    "https://api.apis.guru/v2/specs/chaingateway.io/1.0/exportAddress",
    headers=headers,
)
print(response.json())

const url = 'https://api.apis.guru/v2/specs/chaingateway.io/1.0/exportAddress';

const response = await fetch(url, {
  method: 'POST',
  headers: {
    'Authorization': 'q9PdaWuD4j6DK6vsUgehhL8pgarSrS9m'
  },
}); 
const data = await response.json();
console.log(data);

package main

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

func main() {
	targetURL := "https://api.apis.guru/v2/specs/chaingateway.io/1.0/exportAddress"
	req, _ := http.NewRequest("POST", targetURL, nil)
	req.Header.Set("Authorization", "q9PdaWuD4j6DK6vsUgehhL8pgarSrS9m")

	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/chaingateway.io/1.0/exportAddress")

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

req = Net::HTTP::Post.new(uri)
req["Authorization"] = "q9PdaWuD4j6DK6vsUgehhL8pgarSrS9m"

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

<?php
$url = "https://api.apis.guru/v2/specs/chaingateway.io/1.0/exportAddress";
$opts = ["http" => [
    "method" => "POST",
    "header" => implode("\r\n", [
        "Authorization: q9PdaWuD4j6DK6vsUgehhL8pgarSrS9m"
    ]),
]];
$ctx = stream_context_create($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 Chaingateway.io?

Chaingateway.io 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. Chaingateway.io 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 ↗