We looked through thousands of Other APIs and put together a list of the most popular & cheapest ones available.

The SecurityTrails API allows you to programmatically access all IP, DNS, WHOIS, and company related information that is available in the SecurityTrails Web Platform and beyond.

**SecurityTrails API**
_Data for Security companies, researchers and teams. Fast, always up API that allows you to access current and historical data. The API is paid via a simple pricing structure that allows you to embed our data into your applications._

**Key features**

- **DNS Record History**
It’s all here, fully-indexed historic and current data, ready to be accessed asap.

- **Domain Historical WHOIS Data**
Search nearly 3 billion historical and current WHOIS data and WHOIS changes.

- **Domain Names**
Search our daily-updating database – it’s over 203 million deep and growing.

- **Website Technologies**
Know what tech sites are running, and search by over a thousand technologies.

- **Passive DNS**
Get monthly access to over 1 billion passive DNS datasets.

- **Instant IP & Domain search**
Get the most current intel when it comes to IPs, domains, and hostnames in real-time.

- **Hostname Information**
Get the scoop on www subs and all known subdomains.

- **Tagging**
Searching is fast and simple with tagged and indexed intel.

SecurityTrails API

HTML to PDF API generates fully structured PDFs with few lines of code.

**HTML to PDF API:**
_Simple PDF Conversion API you are looking for._
Generate fully structured PDFs with few lines of code.

**THERE ARE MANY REASONS TO USE OUR HTML to PDF API**
_Our rendering engine supports HTML5, CSS3 and other latest web technologies._

- **High Quality Structured PDF**
Generate fully structured PDF documents with selectable / editable text and images.

- **Browser Based PDF Engine**
Our HTML to PDF conversion engine is based on real browsers and faithfully renders HTML5/CSS3/SVG and Webfonts.

- **GDPR Compliant**
If you are working with personal data and need to ensure that your processor is GDPR compliant, look no further.

- **Advanced Options**
Set dimensions, margins, page numbers, custom CSS, encryption, viewport, delay, and much more.

- **Raw HTML Support**
There is no need to make your HTML publically on the web. You can pass raw HTML with POST method.

- **Fast & Simple HTML to PDF API**
Based on a single lightning fast RestFUL HTTP url, all options are easy to pass and reason about.

Restpack  HTML to PDF API

Petfinder's free API is another way we extend your reach to get pets adopted.

**Petfinder is dedicated to helping pets find homes, and we know you are too.** 
_Petfinder's free API is another way we extend your reach to get pets adopted._

The API provides ready access to data for Petfinder's hundreds of thousands of adoptable pets and the organizations that care for them.

- **Shelters and Rescues**
-- Upload your pets on Petfinder.com and display them anywhere, like on your organization's website.
-- Pull your Petfinder listings into your shelter software with the API instead of adding them manually.
- **App Developers**
-- Display adoptable pets from Petfinder in your web or mobile app.
-- Help users find their perfect pets by location, breed, and other characteristics.

Petfinder API

Retrieve religious, non-public and public holidays for 200+ countries worldwide and for any specific year

**Holidays API**
_Retrieve religious, non-public and public holidays for 200+ countries worldwide and for any specific year_

- 190+ countries 3,500 regions
- Historical and future holidays
- Updated and verified weekly
- Other holidays (e.g., religious) included

**The latest and most accurate public and local holiday data from around the world**

- **190+ countries and 3,500 regions covered**
Abstract's database of public holidays has been global since the beginning, so it covers everywhere from Argentina to Zimbabwe, from Alabama in the US to Zhejiang in China.
- **Data on historical and future holidays**
The holiday dataset is also very extensive in time, covering historical and future holidays ranging from 1 AD to past 2050. Simplify specify the year you need.
- **Holiday data updated and verified monthly**
Countries alter holidays from time to time, whether it's changing the date, name, or adding new ones. So Abstract has a robust process for ensuring the data is always accurate.
- **Non-public, religious holidays included**
For some countries our dataset also includes non public holidays, such as religious holidays, which may not be government-level holidays but which may still be observed by the population.

Holidays API

Quickly and easily get the time and date of a location or IP address, or convert the time and date of one timezone into another

**Time, Date & Timezone API**
_Quickly and easily get the time and date of a location or IP address, or convert the time and date of one timezone into another_

**The Time, Date, and Timezone API makes it easy to find, convert, and manage timezones around the world**

- **Get up to the milisecond time data**
It's critical to have the latest and most accurate VAT data, so Abstract works directly with multiple sources, including the EU Commission itself, to provide you trustworthy data.
- **Convert time from one location to another**
You're required to ensure the VAT numbers that you have or that users submit to you are valid, and Abstract makes it easy to validate VAT numbers with a single, simple API call.
- **Robust global data set of timezones**
Abstract's VAT API can calculate the VAT owed on a specific purchase, taking into account the country of purchase as well as other purchase-specific details.
- **Daylight savings and GMT offset data**
Get VAT rates from individual countries, from across the European Union, and from other countries beyond the EU that use VAT. Abstract is the hub for all your VAT data needs.

Time, Date & Timezone API

Rest API mocking and intercepting in seconds. Replace the endpoint in the code and you are ready.

**Rest API mocking and intercepting in seconds.**
_Replace the endpoint in the code and you are ready. It's that simple!_

**Use cases**

- **Inspect HTTP Traffic**
Get a named subdomain and send an HTTP request. Inspect the request payload and headers. Pretty-format the payloads and share with single click.
- **Build A Mock API**
Using Beeceptor, a mock API endpoints is up and ready to be consumed in a few seconds - No Coding Required. Just define API path, matching rule and response payload.
- **Proxy Mode - Mock or Forward**
Wrap an existing API domain with a Beeceptor endpoint to enable proxy mode. Inspect all the traffic going to the original API. Use mocking rules to mock a few requests and forward the rest to target API. Your application works as usual. Read the docs
- **CORS Support (preflight requests)**
Beeceptor, comes with CORS support and all origins are accepted out of the box. (Access-Control-Allow-Origin: *).
OPTIONS calls will get '200 OK' always.
- **Request Logging**
Search and review all the captured requests and responses. You can filter these by the response-code or request-path to drill down. The requests are available and searchable for 10 days.
- **Named sub-domains and HTTPs!**
Get named endpoints/sub-domains - easy to replace base URL in your code. All endpoints are HTTPs enabled (free or paid).

**Get More Features...**
- Simulate higher latencies by introducing delays and timeouts (validate rarely reachable code paths).
- Customizable responses to simulate API failures.
- When load testing your API, do you really need to pass on the load to downstream APIs? Let Beeceptor mock it for you.
- Quickly switch APIs endpoints. E.g. A/B testing by switching API endpoints or versions without any redeployment.

The Top 15 Other Apis for Developers