📘
Requests to usage.info do not count towards your usage volume.

If the App ID you provided is valid, you will receive a JSON response with a status value (containing the HTTP code of the response) and a data object, containing the following attributes:

app_id: The app ID you provided.
status: The current status of this app ID (either 'active' or 'access_restricted')
plan: Plan information for this app ID
name: The name of the current plan
quota: The monthly request allowance (formatted string for display)
update_frequency: The rate at which data refreshes on this plan
features: The supported features of this plan (base, symbols, experimental, time-series, convert)
usage: Usage information for this app ID
requests: Number of requests made since month start
requests_quota: Number of requests allowed each month with this plan
requests_remaining: Number of requests remaining this month
days_elapsed: Number of days since start of month
days_remaining: Number of days remaining until next month's start
daily_average: Average requests per day

NB: If the App ID belongs to an account with unlimited requests, the usage.requests_quota and usage.requests_remaining values will be -1.

📘
Public Endpoint
Because this API endpoint is accessible to anybody with any App ID, no personal or sensitive account data is ever returned.

Basic Code Samples

$.get('https://openexchangerates.org/api/usage.json', {app_id: 'YOUR_APP_ID'}, function(response) {
    console.log("This Open Exchange Rates app ID has made " + response.data.usage.requests + "hits this month.");
});

<?php
$app_id = '[[app:app_id]]';
$oxr_url = "https://openexchangerates.org/api/latest.json?app_id=" . $app_id;

// Open CURL session:
$ch = curl_init($api_url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);

// Get the data:
$json = curl_exec($ch);
curl_close($ch);

// Decode JSON response:
$oxr_latest = json_decode($json);

// You can now access the rates inside the parsed object, like so:
printf(
    "1 %s equals %s GBP at %s",
    $oxr_latest->base,
    $oxr_latest->rates->GBP,
    date('H:i jS F, Y', $oxr_latest->timestamp)
);
// -> eg. "1 USD equals: 0.656741 GBP at 11:11, 11th December 2015"
?>

More code samples are on their way! Please get in touch if you'd like to submit a new/improved code sample in your languague or framework.