Mock sample for your project: GOV.UK Pay API

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]

Introduction
Taxrates.io is a global tax rate service that automates the management of monitoring tax rates changes in 181 countries. We monitor over 14,000 US sales tax, VAT, GST rates for you and make updates via our API so you always have the most update tax rates.
You can use Taxrates.io as a virtual sandbox where we provide you with 30 days free trial.
Countries
We currently support the following countries around the world. If you would like to request the addition of a new country, please email us at [email protected]
Afghanistan Gambia Nicaragua
Albania Georgia Niger
Andorra Germany Nigeria
Angola Ghana North Korea
Antigua and Barbuda Greece Norway
Argentina Grenada Pakistan
Armenia Guam Palestine
Aruba Guatemala Panama
Australia Guinea Papua New Guinea
Austria Guyana Paraguay
Azerbaijan Haiti Peru
Bahamas Honduras Philippines
Bangladesh Hungary Poland
Barbados Iceland Portugal
Belarus India Puerto Rico
Belgium Indonesia Republic of the Congo
Belize Iran Romania
Benin Ireland Russian Federation
Bhutan Isle of Man Rwanda
Bolivia Israel Samoa
Bonaire Italy Senegal
Bosnia and Herzegovina Japan Serbia
Botswana Jersey Seychelles
Brazil Jordan Sierra Leone
Bulgaria Jordan Singapore
Burkina Faso Kazakhstan Slovakia
Burundi Kenya Slovenia
Cambodia Kiribati Solomon Islands
Cameroon Kosovo Somalia
Cape Verde Kyrgyzstan South Africa
Central African Republic Laos South Korea
Chad Latvia South Sudan
Chile Lebanon Spain
China Lesotho Sri Lanka
Columbia Liberia St Lucia
Comoros Liechtenstein Sudan
Cook Islands Lithuania Suriname
Costa Rica Luxembourg Swaziland
Cote d'Ivoire Macedonia Sweden
Croatia Madagascar Switzerland
Cuba Malawi Tahiti
Curacao Malaysia Taiwan
Cyprus Maldives Tajikistan
Czech Republic Mali Tanzania
Democratic Republic of the Congo Malta Thailand
Denmark Mauritania Togo
Djbouti Mauritius Tonga
Dominica Mexico Trinidad and Tobago
Dominican Republic Micronesia Tunisia
Ecuador Moldova Turkmenistan
Egypt Monaco Tuvalu
El Salvador Mongolia Uganda
Equatorial Guinea Montenegro Ukraine
Eritrea Morocco United Kingdom
Estonia Mozambique United States
Ethiopia Myanmar Uruguay
Fiji Namibia Vanuatu
Finland Nepal Venezuela
France Netherlands Vietnam
Gabon New Zealand Yemen
Products codes
The Taxrates.io API’s provides product-level tax rates for a subset of product codes. These codes are to be used for products that are either exempt from tax in some jurisdictions or are taxed at reduced rates.
We will be expanding support for additional, less common categories over time. If you would like to request the addition of a new product category, please email us at [email protected]
Please select a product code/s when making a request to the Taxrates.io API
Product code Product Description
C010 Services which are not subject to a service-specific tax
C011 Software - Downloaded
C012 Books - Downloaded
C011 Music - Downloaded
C011 Movies/Digital Video - Downloaded
C011 Other Electronic Goods - Downloaded
C011 Streaming Music/Audio Services new
C011 Streaming Video Services new
C018 Software as a Services, Generally (Remote Access to Hosted Software)
C018 Remote Access to Hosted Software - Personal Use
C018 Remote Access to Hosted Software - Business Use
C021 Remote Access to Hosted Business Custom Applications
C021 Personal Cloud Storage/Backup
C021 Business Cloud Storage/Backup
C021 Business Data Warehouses
C022 Infrastructure as Service, Generally
C022 Ecommerce Site/Webserver Hosting
C022 Provision of Virtual Computing Capacity
C022 Software - package or canned program
C022 Software - modifications to canned program
C022 Software - custom programs - material
C022 Software - custom programs - professional serv.
C022 Information services
C022 Data processing services
C022 Mainframe computer access and processing serv.
C022 Online Data processing services
Filtering
When calling the API endpoints you can use 'filter' parameters to get tax rate for the selected type. You can get the following tax types (Each tax rate will always have one of following types)
US Sales tax Rates
CombinedRate
StateRate
CountyRate
CityRate
SpecialRate
We recommend using Postman when discovering our API. Happy using!
Rate Limiting
We limit API requests.
If you’re exceeding this rate and encountering 429 errors, review the following:
Only make requests in states / regions where you have enabled.
Cache responses if the order details haven’t changed since the last calculation at checkout.
Errors
The Taxrates.io API uses the following error codes:
Code Error Message
400 Bad Request – Your request format is bad.
401 Unauthorized – Your API key is wrong.
404 Not Found – The specified resource could not be found.
405 Method Not Allowed – You tried to access a resource with an invalid method.
429 Too Many Requests – You’re requesting too many resources! Slow down!
500 Internal Server Error – We had a problem with our server. Try again later.
503 Service Unavailable – We’re temporarily offline for maintenance. Try again later.
Verify your API token is correct and make sure you’re correctly setting the Authorization header.
If you’re still not sure what’s wrong, contact us and we’ll investigate.
Changelog
Stay on top of new developer-facing features, accuracy improvements, and bug fixes for our API. Have a request? Encounter an issue? We’d love to hear your feedback.
Contact Support:
Name: [email protected]

Swagger for Payment Initiation API Specification

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.

Overview
Tradematic Cloud is a trading infrastructure for building investment services.
It’s a trading engine + API + ready-made adapters to stock and forex brokers, crypto exchanges, and market data providers.
You can use it as a cloud API, or you can deploy it on your servers.
How to use Tradematic Cloud API
Sign up at tradematic.cloud. After signing up, you will receive your API key.
Authorization
Add the 'X-API-KEY' header with your API key to each request.
Examples of writing code with Tradematic Cloud API
Examples are available at tradematic.cloud.
Swagger (.yaml) File
Swagger (.yaml) file can be found here.

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 the Xero Payroll API for orgs in Australia region.

Currency Authority: Exchange Rate of 1453 country currencies and crypto currencies

Swagger for Account and Transaction API Specification

The public PocketSmith API

Swagger for Confirmation of Funds API Specification