Mock sample for your project: Portfolio Optimizer API

The fire.com API allows you to deeply integrate Business Account features into your application or back-office systems.
The API provides read access to your profile, accounts and transactions, event-driven notifications of activity on the account and payment initiation via batches. Each feature has its own HTTP endpoint and every endpoint has its own permission.
The API exposes 3 main areas of functionality: financial functions, service information and service configuration.
Financial Functions
These functions provide access to your account details, transactions, payee accounts, payment initiation etc.
Service Functions
These provide information about the fees and limits applied to your account.
Service configuration
These provide information about your service configs - applications, webhooks, API tokens, etc.

This is a Billingo API v3 documentation. Our API based on REST software architectural style. API has resource-oriented URLs, accepts JSON-encoded request bodies and returns JSON-encoded responses. To use this API you have to generate a new API key on our site. After that, you can test your API key on this page.

The public PocketSmith API

BIN lookup API, the free api service from bintable.com to lookup card information using it's BIN. the service maintains updated database based on the comunity and other third party services to make sure all BINs in the database are accurate and up to date.

For general questions and support of the API, contact: [email protected]
Overview
Paylocity Web Services API is an externally facing RESTful Internet protocol. The Paylocity API uses HTTP verbs and a RESTful endpoint structure. OAuth 2.0 is used as the API Authorization framework. Request and response payloads are formatted as JSON.
Paylocity supports v1 and v2 versions of its API endpoints. v1, while supported, won't be enhanced with additional functionality. For direct link to v1 documentation, please click here. For additional resources regarding v1/v2 differences and conversion path, please contact [email protected].
Setup
Paylocity will provide the secure client credentials and set up the scope (type of requests and allowed company numbers). You will receive the unique client id, secret, and Paylocity public key for the data encryption. The secret will expire in 365 days.
Paylocity will send you an e-mail 10 days prior to the expiration date for the current secret. If not renewed, the second e-mail notification will be sent 5 days prior to secret's expiration. Each email will contain the code necessary to renew the client secret.
You can obtain the new secret by calling API endpoint using your current not yet expired credentials and the code that was sent with the notification email. For details on API endpoint, please see Client Credentials section.
Both the current secret value and the new secret value will be recognized during the transition period. After the current secret expires, you must use the new secret.
If you were unable to renew the secret via API endpoint, you can still contact Service and they will email you new secret via secure email.
When validating the request, Paylocity API will honor the defaults and required fields set up for the company default New Hire Template as defined in Web Pay.
Authorization
Paylocity Web Services API uses OAuth2.0 Authentication with JSON Message Format.
All requests of the Paylocity Web Services API require a bearer token which can be obtained by authenticating the client with the Paylocity Web Services API via OAuth 2.0.
The client must request a bearer token from the authorization endpoint:
auth-server for production: https://api.paylocity.com/IdentityServer/connect/token
auth-server for testing: https://apisandbox.paylocity.com/IdentityServer/connect/token
Paylocity reserves the right to impose rate limits on the number of calls made to our APIs. Changes to API features/functionality may be made at anytime with or without prior notice.
Authorization Header
The request is expected to be in the form of a basic authentication request, with the "Authorization" header containing the client-id and client-secret. This means the standard base-64 encoded user:password, prefixed with "Basic" as the value for the Authorization header, where user is the client-id and password is the client-secret.
Content-Type Header
The "Content-Type" header is required to be "application/x-www-form-urlencoded".
Additional Values
The request must post the following form encoded values within the request body:
granttype = clientcredentials
scope = WebLinkAPI
Responses
Success will return HTTP 200 OK with JSON content:
{
"access_token": "xxx",
"expires_in": 3600,
"token_type": "Bearer"
}
Encryption
Paylocity uses a combination of RSA and AES cryptography. As part of the setup, each client is issued a public RSA key.
Paylocity recommends the encryption of the incoming requests as additional protection of the sensitive data. Clients can opt-out of the encryption during the initial setup process. Opt-out will allow Paylocity to process unencrypted requests.
The Paylocity Public Key has the following properties:
2048 bit key size
PKCS1 key format
PEM encoding
Properties
key (base 64 encoded): The AES symmetric key encrypted with the Paylocity Public Key. It is the key used to encrypt the content. Paylocity will decrypt the AES key using RSA decryption and use it to decrypt the content.
iv (base 64 encoded): The AES IV (Initialization Vector) used when encrypting the content.
content (base 64 encoded): The AES encrypted request. The key and iv provided in the secureContent request are used by Paylocity for decryption of the content.
We suggest using the following for the AES:
CBC cipher mode
PKCS7 padding
128 bit block size
256 bit key size
Encryption Flow
Generate the unencrypted JSON payload to POST/PUT
Encrypt this JSON payload using your own key and IV (NOT with the Paylocity public key)
RSA encrypt the key you used in step 2 with the Paylocity Public Key, then, base64 encode the result
Base64 encode the IV used to encrypt the JSON payload in step 2
Put together a "securecontent" JSON object:
{
'secureContent' : {
'key' : -- RSA-encrypted & base64 encoded key from step 3,
'iv' : -- base64 encoded iv from step 4
'content' -- content encrypted with your own key from step 2, base64 encoded
}
}
Sample Example
{
"secureContent": {
"key": "eS3aw6H/qzHMJ00gSi6gQ3xa08DPMazk8BFY96Pd99ODA==",
"iv": "NLyXMGq9svw0XO5aI9BzWw==",
"content": "gAEOiQltO1w+LzGUoIK8FiYbU42hug94EasSl7N+Q1w="
}
}
Sample C# Code
using Newtonsoft.Json;
using System;
using System.IO;
using System.Security.Cryptography;
using System.Text;
public class SecuredContent
{
[JsonProperty("key")]
public string Key { get; set; }
[JsonProperty("iv")]
public string Iv { get; set; }
[JsonProperty("content")]
public string Content { get; set; }
}
public class EndUserSecureRequestExample
{
public string CreateSecuredRequest(FileInfo paylocityPublicKey, string unsecuredJsonRequest)
{
string publicKeyXml = File.ReadAllText(paylocityPublicKey.FullName, Encoding.UTF8);
SecuredContent secureContent = this.CreateSecuredContent(publicKeyXml, unsecuredJsonRequest);
string secureRequest = JsonConvert.SerializeObject(new { secureContent });
return secureRequest;
}
private SecuredContent CreateSecuredContent(string publicKeyXml, string request)
{
using (AesCryptoServiceProvider aesCsp = new AesCryptoServiceProvider())
{
aesCsp.Mode = CipherMode.CBC;
aesCsp.Padding = PaddingMode.PKCS7;
aesCsp.BlockSize = 128;
aesCsp.KeySize = 256;
using (ICryptoTransform crt = aesCsp.CreateEncryptor(aesCsp.Key, aesCsp.IV))
{
using (MemoryStream outputStream = new MemoryStream())
{
using (CryptoStream encryptStream = new CryptoStream(outputStream, crt, CryptoStreamMode.Write))
{
byte[] encodedRequest = Encoding.UTF8.GetBytes(request);
encryptStream.Write(encodedRequest, 0, encodedRequest.Length);
encryptStream.FlushFinalBlock();
byte[] encryptedRequest = outputStream.ToArray();
using (RSACryptoServiceProvider crp = new RSACryptoServiceProvider())
{
crp.FromXmlstring(publicKeyXml);
byte[] encryptedKey = crp.Encrypt(aesCsp.Key, false);
return new SecuredContent()
{
Key = Convert.ToBase64string(encryptedKey),
Iv = Convert.ToBase64string(aesCsp.IV),
Content = Convert.ToBase64string(encryptedRequest)
};
}
}
}
}
}
}
}
Support
Questions about using the Paylocity API? Please contact [email protected].
Deductions (v1)
Deductions API provides endpoints to retrieve, add, update and delete deductions for a company's employees. For schema details, click here.
OnBoarding (v1)
Onboarding API sends employee data into Paylocity Onboarding to help ensure an easy and accurate hiring process for subsequent completion into Web Pay. For schema details, click here.

nFusion Solutions provides REST APIs that deliver enterprise-grade financial data. Data sets include real-time and historical pricing for Spot prices of precious metals such as Gold, Silver, Platinum, and Palladium, exchange rates for major currency pairs, exchange rates for Crypto Currencies such as BTC, ETH, and LTC. All API access requires authentication. In order to be issued access credentials you must first enter into a service agreement with nFusion Solutions and acquire a commercial license. For information on how to obtain a licence take a tour of our products or email [email protected].

Summary
The Swiss NextGen API is based on the NextGenPSD2 Framework Version 1.3.4 of the Berlin Group which offers a modern, open, harmonised and interoperable set of
Application Programming Interfaces (APIs) as the safest and most efficient way to provide data securely.
The NextGen Framework reduces XS2A complexity and costs, addresses the problem of multiple competing standards
in Europe and, aligned with the goals of the Euro Retail Payments Board,
enables European banking customers to benefit from innovative products and services ('Banking as a Service')
by granting TPPs safe and secure (authenticated and authorised) access to their bank accounts and financial data.
The Swiss edtion refines the message formats specific to Switzerland and defines some matching examples.
The possible Approaches are:
Redirect SCA Approach
(Not recommended by obp.ch community) OAuth SCA Approach
(Not recommended by obp.ch community) Decoupled SCA Approach
(Not recommended by obp.ch community) Embedded SCA Approach without SCA method
(Not recommended by obp.ch community) Embedded SCA Approach with only one SCA method available
(Not recommended by obp.ch community) Embedded SCA Approach with Selection of a SCA method
Not every message defined in this API definition is necessary for all approaches.
Furthermore this API definition does not differ between methods which are mandatory, conditional, or optional
Therefore for a particular implementation of a compliant API it is only necessary to support
a certain subset of the methods defined in this API definition.
**Please have a look at the implementation guidelines if you are not sure
which message has to be used for the approach you are going to use.**
Some General Remarks Related to this version of the OpenAPI Specification:
This API definition is based on the Implementation Guidelines of the Berlin Group API.
It is not a replacement in any sense.
The main specification is (at the moment) always the Implementation Guidelines of the Berlin Group API.
This API definition contains the REST-API for requests from the PISP to the ASPSP.
This API definition contains the messages for all different approaches defined in the Implementation Guidelines.
According to the OpenAPI-Specification [https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.1.md]
"If in is "header" and the name field is "Accept", "Content-Type" or "Authorization", the parameter definition SHALL be ignored."
The element "Accept" will not be defined in this file at any place.
The elements "Content-Type" and "Authorization" are implicitly defined by the OpenApi tags "content" and "security".
There are several predefined types which might occur in payment initiation messages,
but are not used in the standard JSON messages in the Implementation Guidelines.
Therefore they are not used in the corresponding messages in this file either.
We added them for the convenience of the user.
If there is a payment product, which needs these fields, one can easily use the predefined types.
But the ASPSP need not to accept them in general.
**We omit the definition of all standard HTTP header elements (mandatory/optional/conditional)
except they are mentioned in the Implementation Guidelines.**
Therefore the implementer might add these in his own realisation of a comlient API in addition to the elements defined in this file.
General Remarks on Data Types
The Berlin Group definition of UTF-8 strings in context of the API have to support at least the following characters
a b c d e f g h i j k l m n o p q r s t u v w x y z
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
0 1 2 3 4 5 6 7 8 9
/ - ? : ( ) . , ' +
Space

Chaingateway.io
REST API to build the bridge between Ethereum and the real world
Please check out our website 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.
For our internal documentation, please check out our Docs Site.
If you need help with integrating our API in your application, you can reach us via email or join our official Telegram group.

The Up API gives you programmatic access to your balances and
transaction data. You can request past transactions or set up
webhooks to receive real-time events when new transactions hit your
account. It’s new, it’s exciting and it’s just the beginning.

Interactive Brokers Web API for 3rd Party Companies