Text, Language & Speech: 53 free APIs

Translation, dictionaries, sentiment, speech-to-text, text-to-speech and media conversion. Every record below links to its own documentation page.

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Asynchronous Speech-To-Text API Documentation Rev.ai provides quality speech-text recognition via a RESTful API. All public methods and objects are documented here for developer reference. For a real-time speech to text solution, use Rev.ai's Streaming API. # Base Endpoint The base url for this version of the API is > https://api.rev.ai/speechtotext/v1 All endpoints described in this documentation are relative to this base url. # Quick Start Follow the getting started checklist ## Get your Access Token You can generate your access token on the settings page of your account. This access token only needs to be generated once and never expires. You can re-generate your token, however this will invalidate the previous token. ## Submit a File To submit an audio file for transcription to Rev.ai: curl -X POST "https://api.rev.ai/speechtotex…
Contract.fit API This OpenAPI describes the API exposed by the contract.fit backend. ## Security ### Authentication All endpoints are protected: you need to make authenticated calls. There are 3 authentication mechanisms: - HTTP Basic (Username + Password) - JWT Token - API-Key By default you should have an account allowing you to bootstrap your tenant and create users and roles, using Basic Auth or after creating a Token - see /auth endpoints. If you are missing credentials or permissions, please contact us. ### Authorization The security system is RBAC based: users must be granted scoped roles, allowing them to access resources. Each role grants a defined set of permissions, which can be restricted to a given inbox or document - see /roles endpoints. ## Upload and Processing Below is a short description…
FunTranslations API Funtranslations API gives access to the full set of translations available at funtranslations.com so that you can integrate them in your workflow or an app. Click here to get details and subscribe . Here are the individual API links: ## Morse code API ## Morse code conversion API on the cloud. Translate to and from Morse Code.Click here to subscribe ## Braille API ## Braille conversion API on the cloud. Translate to Braille and get Braille results suitable for many display types.Click here to subscribe ## Starwars Translation API ## Ever wonder how to talk like Yoda? Well, use our API and let your APP/webpage speak like Yoda too.Click here to subscribe Sith Translator API. Click here to subscribe Cheunh Translator API. Click here to subscribe Huttese Translator API. Click here to subscrib…
IdealSpot GeoData Hyperlocal Demographics, Vehicle Traffic, Economic, Market Signals, and More. Use this API to request IdealSpot hyperlocal geospatial market insight and geometry data. ## Detailed Description Use this API as your local economy microscope by querying IdealSpot hyperlocal market insight and geometry data. We offer the most precise, extensive, and frequently-updated local market data in the US. Our data is available across the entire US and can be queried at geographic scales ranging from the micro (Census block) through the macro (nation). Better data and analysis leads to a better understanding of local market opportunities and risks. Integrate with your commercial real estate and marketing applications, machine learning workflows, and other investment analytics. Our goal is to offer the m…
Tisane API Documentation Tisane is a natural language processing library, providing: standard NLP functionality special functions for detection of problematic or abusive content low-level NLP like morphological analysis and tokenization of no-space languages (Chinese, Japanese, Thai) Tisane has monolithic architecture. All the functions are exposed using the same language models and the same analysis process invoked using the POST /parse method. Other methods in the API are either wrappers based on the process, helper methods, or allow inspection of the language models. The current section of the documentation describes the two structures used in the parsing & transformation methods. # Getting Started This guide describes how to setup your Tisane account. The steps you need to complete are as follows: Step 1 – Cr…
PDF Generator API Introduction PDF Generator API allows you easily generate transactional PDF documents and reduce the development and support costs by enabling your users to create and manage their document templates using a browser-based drag-and-drop document editor. The PDF Generator API features a web API architecture, allowing you to code in the language of your choice. This API supports the JSON media type, and uses UTF-8 character encoding. You can find our previous API documentation page with references to Simple and Signature authentication here. ## Base URL The base URL for all the API endpoints is https://us1.pdfgeneratorapi.com/api/v3 For example https://us1.pdfgeneratorapi.com/api/v3/templates https://us1.pdfgeneratorapi.com/api/v3/workspaces https://us1.pdfgeneratorapi.com/api/v3/templates…
VisibleThread API Introduction The VisibleThread b API provides services for analyzing/searching documents and web pages. To use the service you need an API key. Contact us at support@visiblethread.com to request an API key. The services are split into Documents and Webscans. ### Documents Upload documents and dictionaries so you can : - Measure the readability of your document - search a document for all terms from a dictionary - retrieve all paragraphs from a document or only matching paragraphs ### Webscans Analyze web pages so you can: - Measure the readability of your web content - Identify & highlight content issues e.g. long sentences, passive voice The VisibleThread API allows you to programatially submit webpage urls to be scanned, check on the results of a scan, and view a list of previous sca…
DynamicDocs ADVICEment's DynamicDocs API automates your document generation and creates dynamic, optimized, interactive PDFs. Write your templates in LaTeX and call the API with JSON data to get your PDFs in seconds. The template files are stored in your dashboard and can be edited, tested and published online. Document templates can contain dynamic text using logic statements, include tables stretching multiple pages and show great-looking charts based on the underlying data. LaTeX creates crisp, high-quality documents where every detail is well-positioned and styled. Integrate with ADVICEment DynamicDocs API in minutes and start creating beautiful dynamic PDF documents for your needs. For more information, visit DynamicDocs API Home page.
Starwars Translations API Funtranslations Starwars API gives access to the full set of starwars language translations available at funtranslations.com so that you can integrate them in your workflow or an app. Click here to get details and subscribe . You can also subscribe to individual translators. Here are the details. Ever wonder how to talk like Yoda? Well, use our API and let your APP/webpage speak like Yoda too.Click here to subscribe Sith Translator API. Click here to subscribe Cheunh Translator API. Click here to subscribe Huttese Translator API. Click here to subscribe Mandalorian Translator API. Click here to subscribe Gungan Translator API. Click here to subscribe
Geneea Natural Language Processing Authentication For all calls, supply your API key. Sign up to obtain the key . Our API supports both unencrypted (HTTP) and encrypted (HTTPS) protocols. However, for security reasons, we strongly encourage using only the encrypted version. The API key should be supplied as either a request parameter userkey or in Authorization header. Authorization: userkey <YOURAPIKEY> API operations All API operations can perform analysis on supplied raw text or on text extracted from a given URL. Optionally, one can supply additional information which can make the result more precise. An example of such…
LanguageTool API Check texts for style and grammar issues with LanguageTool . Please consider the following default limitations: your daily request limit depending on your plan maximum number of requests per minute: 20 (free) / 80 (Premium) maximum number of characters per minute: 75,000 (free) / 300,000 (Premium) maximum number of characters per request: 20,000 (free) / 60,000 (Premium) for the free version, also consider the limitations documented here Note: any parameters or outputs not part of this documentation are internal and must not be relied on Need more generous limits? Just <a href='https://l…
NamSor API v2 NamSor API v2 : enpoints to process personal names (gender, cultural origin or ethnicity) in all alphabets or languages. By default, enpoints use 1 unit per name (ex. Gender), but Ethnicity classification uses 10 to 20 units per name depending on taxonomy. Use GET methods for small tests, but prefer POST methods for higher throughput (batch processing of up to 100 names at a time). Need something you can't find here? We have many more features coming soon. Let us know, we'll do our best to add it!
Fun Generators API Fungenerators API gives access to the full set of generators available at fungenerators.com so that you can integrate them in your workflow or an app. Click here to get details and subscribe . Here are the individual API links: ## QR Code API ## Generate QR Code images for text, url, email , business cards etc. You can decode QR Code images and get the contents as well. The best and complete QR Code API on the cloud. Click here to subscribe
Word Associations API The Word Associations Network API allows developers to embed the ability to find associations for a word or phrase into their mobile apps or web services. Words are grouped by semantics, meaning, and psychological perception. The Word Associations Network API currently supports English, French, Spanish, German, Italian, Portuguese, and Russian vocabulary. Please register and subscribe to one of available tariff plans to get a valid API key.
Text Analytics & Sentiment Analysis API | api.text2data.com The current api version is v3.4 The api methods listed below can be called directly from this page to test the output. You might set the apikey to pre-authenticate all requests on this page (this will work if your secret is blank). API endpoint URL: http://{apiName}.text2data.com/v3/ {method} The api can be consumed directly or using our SDK. Our Excel Add-In and Google Sheets Add-on are also using this api to process the data.
Handwrytten API This is the Handwrytten API for sending cards written in the handwriting of your choice. Using this api, you can send cards to users. You can also customize cards with logos, which can be saved and then used like any other card in the system. For a "sandbox" account, please contact contact@handwrytten.com To move from credit card per-transaction to monthly invoicing, also contact us. https://www.handwrytten.com
Einstein Vision and Einstein Language Provided by Salesforce � Copyright 2000�2020 salesforce.com, inc. All rights reserved. Salesforce is a registered trademark of salesforce.com, inc., as are other names and marks. Other marks appearing herein may be trademarks of their respective owners. Last updated: Aug 17, 2020
Facts API A full featured Facts API. REST access with json/xml/jsonp result support. On this day birth and death support, random fact, keyword search support etc. Below is the documentation for the Random Facts API calls. You can try them out right here. Click here to subscribe
Barcode API Generate Barcode images for a given barcode number. You can decode Barcode images and get the barcodes in a numberic form as well. Many industry standard barcode types are supported. The best and complete Barcode API on the cloud. Click here to subscribe
Pirates API Ahoy matey! We help the landlubbers to get to know about the seamen way! You can generate pirate names, get some real pirate insults and pirate filler text. Oh you can translate to pirate lingo as well. Click here to subscribe
SelectPdf HTML To PDF API SelectPdf HTML To PDF Online REST API is a professional solution that lets you create PDF from web pages and raw HTML code in your applications. The API is easy to use and the integration takes only a few lines of code.
Exude API Service Exude API is an Open Source project, It is used for the primary ways for filtering the stopping, stemming words from the text data. This API is in a very basic level of development need to work on for later changes.
PDF Blocks API PDF Blocks is a secure, reliable, and fast API to work with PDF documents. Actions include: Merge PDF documents, add or remove passwords, add watermarks, remove, extract, reverse, and rotate pages, and more.
Taunt as a service Fungenerators taunt generation API generates random taunts / insults, relevant to the given category. Many categories are supported and new ones are added very frequently. Click here to subscribe
Football Prediction API The Football Prediction API allows developers to get predictions for upcoming football (soccer) matches, results for past matches, and performance monitoring for statistical models.
Name Generation API Fungenerators name generation API generates random names relevant to the given category. Lots of categories are supported with many variations supported. Click here to subscribe
Shakespeare API Shakespeare API. Generate random Shakespeare quotes, names, insults, lorem ipsum etc. Translate normal English to Shakespeare English. Click here to subscribe
FunTranslations Braille API Braille conversion API on the cloud. Translate from English text to Braille and get Braille results suitable for many display types.Click here to subscribe
TAGGUN Receipt OCR Scanning API Expects only running software, real reactions, and beautifully crafted APIs to serve your every desire to transcribe a piece of paper to digital form.
UUID Generation API A full featured, REST based UUID generator with json/xml/jsonp result support. You can try them out right here. Click here to subscribe
Ex Libris APIs For more information on how to use these APIs, including how to create an API key required for authentication, see Alma REST APIs.
ocrapi The powerful Optical Character Recognition (OCR) APIs let you convert scanned images of pages into recognized text.
Historische Daten Abfrage von Wetterdaten aus der Vergangenheit. Der maximale Abfragezeitraum beträgt 366 Tage (1 Jahr).
PdfBroker.io API PdfBroker.io is an api for creating pdf files from Xsl-Fo or Html and other useful pdf utilities.
Wordnik Wordnik is the worlds biggest online English dictionary, by number of words
CalorieNinjas Natural language nutrition API to extract nutrition data from any text.
API v1 DocSpring is a service that helps you fill out and sign PDF templates.
MotaWord API Use MotaWord API to post and track your translation projects.
Tafqit Convert numbers to their Arabic text representation
DLx The Digital Linguistics (DLx) REST API

Rows marked ↗ have no reference page of their own — the source registry did not provide enough to write one — so they link straight to the provider's documentation.

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How the 53 records in this category authenticate callers. Values come straight from the source registries; records the sources do not describe are counted as unknown rather than guessed.

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