Mock sample for your project: The Consumer Financial Protection Bureau API

Portfolio Optimizer is a Web API to optimize the composition of investment portfolios (collection of financial assets such as stocks, bonds, ETFs, crypto-currencies) using modern portfolio theory-like algorithms (mean-variance, etc.).
API General Information
Portfolio Optimizer is based on REST for easy integration, uses JSON for the exchange of data and uses the two most common HTTP verbs (GET, POST) to represent the actions.
Portfolio Optimizer is also as secured as a Web API could be:
256-bit HTTPS Encryption
No usage of cookies
No usage of personal data
API Headers
The following HTTP header(s) are required when calling Portfolio Optimizer endpoints:
Content-type: application/json
This header specifies that the data provided in input to the endpoint is in JSON format
The following HTTP header(s) are optional when calling Portfolio Optimizer endpoints:
X-API-Key:
This header enables authenticated users to provide their private API key in order to benefit from higher API limits
API Key
Portfolio Optimizer is free to use, but not free to run.
In order to obtain an API key and benefit from higher API limits, a small participation to Portfolio Optimizer running costs is required.
This participation takes the form of coffee(s), with one coffee = one month of usage.
Notes:
> * Please make sure not to expose your API key publicly!
API Limits
Portfolio Optimizer comes with fairly reasonable API limits.
For anonymous users:
The API requests are restricted to a subset of all the available endpoints and/or endpoints features
The API requests are limited to 1 request per second for all the anonymous users combined, with concurrent requests rejected
The API requests are limited to 1 second of execution time
The API requests are limited to 20 assets, 100 portfolios, 500 series data points and 5 factors
For authenticated users with an API key:
The API requests have access to all the available endpoints and endpoints features
The API requests are limited to 10000 requests per 24 hour per API key, with concurrent requests queued
The API requests are limited to 2.5 seconds of execution time
The API requests are limited to 100 assets, 500 portfolios, 2500 series data points and 25 factors
> Notes:
> * It is possible to further relax the API limits, or to disable the API limits alltogether; please contact the support for more details.
> * Information on the API rate limits are provided in response messages HTTP headers x-ratelimit-*:
> * x-ratelimit-limit-second, the limit on the number of API requests per second
> * x-ratelimit-remaining-second, the number of remaining API requests in the current second
> * x-ratelimit-limit-minute, the limit on the number of API requests per minute
> * ...
API Regions
Portfolio Optimizer servers are located in Western Europe.
> Notes:
> * It is possible to deploy Portfolio Optimizer in other geographical regions, for example to improve the API latency; please contact the support for more details.
API Response Codes
Standard HTTP response codes are used by Portfolio Optimizer to provide details on the status of API requests.
| HTTP Code | Description | Notes |
| --------- | ----------- | ----- |
| 200 | Request successfully processed | - |
| 400 | Request failed to be processed because of incorrect content | The response message body contains information on the incorrect content |
| 401 | Request failed to be processed because of invalid API key | - |
| 404 | Request failed to be processed because of non existing endpoint | The requested endpoint might exist, but needs to be accessed with another HTTP method (e.g., POST instead of GET) |
| 429 | Request failed to be processed because of API limits violated | The response message HTTP headers x-ratelimit-* contain information on the API limits |
| 500 | Request failed to be processed because of an internal error | Something went wrong on Portfolio Optimizer side, do not hesitate to report the issue |
| 502 | Request failed to be processed because of a temporary connectivity error | Something went wrong on Portfolio Optimizer side, please check the API status and do not hesitate to report the issue |
API Status
Portfolio Optimizer is monitored 24/7 by UptimeRobot.
Support
For any issue or question about Portfolio Optimizer, please do not hesitate to contact the support.

These endpoints are specific to Xero Files API

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 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.

Stock and Forex Data and Realtime Quotes

Swagger for Event Notification API Specification - TPP Endpoints

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.

La estandarización de la conexión con cualquier banco en tiempo real.

An API for accessing the NaviPlan Fact Finder.

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.

The Bank Feeds API is a closed API that is only available to financial institutions that have an established financial services partnership with Xero. If you're an existing financial services partner that wants access, contact your local Partner Manager. If you're a financial institution who wants to provide bank feeds to your business customers, contact us to become a financial services partner.