Security APIs add threat intelligence and protection to your stack — IP reputation, vulnerability databases, malware scanning, and breach lookups. Community projects like abuse.ch publish free feeds, while enterprise services meter by query volume. These APIs often handle sensitive context, so review each provider's data-retention policy alongside its technical limits.
| API | Pricing | Auth | CORS | Health | |
|---|---|---|---|---|---|
| 1,000,000+ Recipe and Grocery List API (v2) API #Documentation This is the documentation for the partner endpoint of the BigOven Recipe and Grocery List API. The update brings with it Swagger-based documentation. [Swagger](http://swagger.io) is an emerging standard fo | Unknown | Unknown | Yes | Profile | |
| 1Password Connect API REST API interface for 1Password Connect. | Free | Unknown | Yes | Profile | |
| AWS CognitoIdentity API Official AWS CognitoIdentity service API exposed through AWS SDKs and service API references. | Paid | API Key | Yes | Profile | |
| AWS CognitoIdentityServiceProvider API Official AWS CognitoIdentityServiceProvider service API exposed through AWS SDKs and service API references. | Paid | API Key | Yes | Profile | |
| AWS CognitoSync API Official AWS CognitoSync service API exposed through AWS SDKs and service API references. | Paid | API Key | Yes | Profile | |
| AWS GuardDuty API Official AWS GuardDuty service API exposed through AWS SDKs and service API references. | Paid | API Key | Yes | Profile | |
| AWS IAM API Official AWS IAM service API exposed through AWS SDKs and service API references. | Paid | API Key | Yes | Profile | |
| AWS Inspector API Official AWS Inspector service API exposed through AWS SDKs and service API references. | Paid | API Key | Yes | Profile | |
| AWS KMS API Official AWS KMS service API exposed through AWS SDKs and service API references. | Paid | API Key | Yes | Profile | |
| AWS SecretsManager API Official AWS SecretsManager service API exposed through AWS SDKs and service API references. | Paid | API Key | Yes | Profile | |
| AWS Shield API Official AWS Shield service API exposed through AWS SDKs and service API references. | Paid | API Key | Yes | Profile | |
| AWS WAF API Official AWS WAF service API exposed through AWS SDKs and service API references. | Paid | API Key | Yes | Profile | |
| AWS WAFRegional API Official AWS WAFRegional service API exposed through AWS SDKs and service API references. | Paid | API Key | Yes | Profile | |
| AltoroJ REST API AltoroJ REST API public API. | Unknown | Unknown | Yes | Profile | |
| Api2Pdf - PDF Generation, Powered by AWS Lambda API # Introduction [Api2Pdf](https://www.api2pdf.com) is a powerful PDF generation API with no rate limits or file size constraints. Api2Pdf runs on AWS Lambda, a serverless architecture powered by Amazon to scale to million | Free | API Key | Yes | Profile | |
| Application Environment Verification Android library and API to verify the safety of user devices, detect rooted devices and other risks | Free | API Key | No | Profile | |
| Authentiq API Strong authentication, without the passwords. | Unknown | Unknown | Yes | Profile | |
| Authorized Partner API Specification API To access files in user’s DigiLocker account from your application, you must first obtain user’s authorization. | Unknown | Unknown | Yes | Profile | |
| Azure Api Management Api Management API 2016-10-10 3 Official Microsoft Azure REST API OpenAPI specification for specification/apimanagement/resource-manager/Microsoft.ApiManagement/ApiManagement/stable/2016-10-10/apimauthorizationservers.json. | Paid | API Key | Yes | Profile | |
| Azure Api Management Api Management API 2017-03-01 3 Official Microsoft Azure REST API OpenAPI specification for specification/apimanagement/resource-manager/Microsoft.ApiManagement/ApiManagement/stable/2017-03-01/apimauthorizationservers.json. | Paid | API Key | Yes | Profile | |
| Azure Api Management Api Management API 2018-01-01 5 Official Microsoft Azure REST API OpenAPI specification for specification/apimanagement/resource-manager/Microsoft.ApiManagement/ApiManagement/stable/2018-01-01/apimauthorizationservers.json. | Paid | API Key | Yes | Profile | |
| Azure Api Management Api Management API 2019-01-01 7 Official Microsoft Azure REST API OpenAPI specification for specification/apimanagement/resource-manager/Microsoft.ApiManagement/ApiManagement/stable/2019-01-01/apimauthorizationservers.json. | Paid | API Key | Yes | Profile | |
| Azure Api Management Api Management API 2019-12-01 5 Official Microsoft Azure REST API OpenAPI specification for specification/apimanagement/resource-manager/Microsoft.ApiManagement/ApiManagement/stable/2019-12-01/apimauthorizationservers.json. | Paid | API Key | Yes | Profile | |
| Azure Api Management Api Management API 2020-12-01 5 Official Microsoft Azure REST API OpenAPI specification for specification/apimanagement/resource-manager/Microsoft.ApiManagement/ApiManagement/stable/2020-12-01/apimauthorizationservers.json. | Paid | API Key | Yes | Profile | |
| Azure Api Management Api Management API 2024-05-01 4 Official Microsoft Azure REST API OpenAPI specification for specification/apimanagement/resource-manager/Microsoft.ApiManagement/ApiManagement/stable/2024-05-01/apimauthorizationservers.json. | Paid | API Key | Yes | Profile | |
| Azure Api Management Api Management API 2024-05-01 44 Official Microsoft Azure REST API OpenAPI specification for specification/apimanagement/resource-manager/Microsoft.ApiManagement/ApiManagement/stable/2024-05-01/apimauthorizationproviders.json. | Paid | Unknown | Yes | Profile | |
| Azure Attestation Attestation API 2021-06-01 Official Microsoft Azure REST API OpenAPI specification for specification/attestation/resource-manager/Microsoft.Attestation/Attestation/stable/2021-06-01/attestation.json. | Paid | API Key | Yes | Profile | |
| Azure Attestation Attestation API 2025-06-01 Official Microsoft Azure REST API OpenAPI specification for specification/attestation/data-plane/Attestation/stable/2025-06-01/attestation.json. | Paid | Unknown | Yes | Profile | |
| Azure Authorization Authorization API 2015-07-01 Official Microsoft Azure REST API OpenAPI specification for specification/authorization/resource-manager/Microsoft.Authorization/Authorization/stable/2015-07-01/authorization-ClassicAdminCalls.json. | Paid | Unknown | Yes | Profile | |
| Azure Authorization Authorization API 2015-07-01 2 Official Microsoft Azure REST API OpenAPI specification for specification/authorization/resource-manager/Microsoft.Authorization/Authorization/stable/2015-07-01/ClassicAdmin.json. | Paid | Unknown | Yes | Profile | |
| Azure Authorization Authorization API 2015-07-01 3 Official Microsoft Azure REST API OpenAPI specification for specification/authorization/resource-manager/Microsoft.Authorization/Authorization/stable/2015-07-01/authorization-ElevateAccessCalls.json. | Paid | Unknown | Yes | Profile | |
| Azure Authorization Authorization API 2020-10-01 Official Microsoft Azure REST API OpenAPI specification for specification/authorization/resource-manager/Microsoft.Authorization/Authorization/stable/2020-10-01/EligibleChildResources.json. | Paid | API Key | Yes | Profile | |
| Azure Authorization Authorization API 2020-10-01 2 Official Microsoft Azure REST API OpenAPI specification for specification/authorization/resource-manager/Microsoft.Authorization/Authorization/stable/2020-10-01/RoleAssignmentSchedule.json. | Paid | API Key | Yes | Profile | |
| Azure Authorization Authorization API 2020-10-01 3 Official Microsoft Azure REST API OpenAPI specification for specification/authorization/resource-manager/Microsoft.Authorization/Authorization/stable/2020-10-01/RoleAssignmentScheduleInstance.json. | Paid | Unknown | Yes | Profile | |
| Azure Authorization Authorization API 2020-10-01 4 Official Microsoft Azure REST API OpenAPI specification for specification/authorization/resource-manager/Microsoft.Authorization/Authorization/stable/2020-10-01/RoleAssignmentScheduleRequest.json. | Paid | Unknown | Yes | Profile | |
| Azure Authorization Authorization API 2020-10-01 5 Official Microsoft Azure REST API OpenAPI specification for specification/authorization/resource-manager/Microsoft.Authorization/Authorization/stable/2020-10-01/RoleEligibilitySchedule.json. | Paid | API Key | Yes | Profile | |
| Azure Authorization Authorization API 2020-10-01 6 Official Microsoft Azure REST API OpenAPI specification for specification/authorization/resource-manager/Microsoft.Authorization/Authorization/stable/2020-10-01/RoleEligibilityScheduleInstance.json. | Paid | API Key | Yes | Profile | |
| Azure Authorization Authorization API 2020-10-01 7 Official Microsoft Azure REST API OpenAPI specification for specification/authorization/resource-manager/Microsoft.Authorization/Authorization/stable/2020-10-01/RoleEligibilityScheduleRequest.json. | Paid | Unknown | Yes | Profile | |
| Azure Authorization Authorization API 2020-10-01 8 Official Microsoft Azure REST API OpenAPI specification for specification/authorization/resource-manager/Microsoft.Authorization/Authorization/stable/2020-10-01/RoleManagementPolicy.json. | Paid | API Key | Yes | Profile | |
| Azure Authorization Authorization API 2020-10-01 9 Official Microsoft Azure REST API OpenAPI specification for specification/authorization/resource-manager/Microsoft.Authorization/Authorization/stable/2020-10-01/RoleManagementPolicyAssignment.json. | Paid | Unknown | Yes | Profile | |
| Azure Authorization Authorization API 2022-04-01 Official Microsoft Azure REST API OpenAPI specification for specification/authorization/resource-manager/Microsoft.Authorization/Authorization/stable/2022-04-01/authorization-ProviderOperationsCalls.json. | Paid | Unknown | Yes | Profile | |
| Azure Authorization Authorization API 2022-04-01 2 Official Microsoft Azure REST API OpenAPI specification for specification/authorization/resource-manager/Microsoft.Authorization/Authorization/stable/2022-04-01/authorization-RoleAssignmentsCalls.json. | Paid | API Key | Yes | Profile | |
| Azure Authorization Authorization API 2022-04-01 3 Official Microsoft Azure REST API OpenAPI specification for specification/authorization/resource-manager/Microsoft.Authorization/Authorization/stable/2022-04-01/authorization-RoleDefinitionsCalls.json. | Paid | API Key | Yes | Profile | |
| Azure Authorization Authorization API 2022-04-01 4 Official Microsoft Azure REST API OpenAPI specification for specification/authorization/resource-manager/Microsoft.Authorization/Authorization/stable/2022-04-01/authorization-DenyAssignmentCalls.json. | Paid | Unknown | Yes | Profile | |
| Azure Aws Connector Microsoft.Aws Connector API 2024-12-01 32 Official Microsoft Azure REST API OpenAPI specification for specification/awsconnector/resource-manager/Microsoft.AwsConnector/stable/2024-12-01/ec2SecurityGroup.json. | Paid | Unknown | Yes | Profile | |
| Billbee API Documentation of the Billbee REST API to connect a Billbee account to external aplications. ## Endpoint The Billbee API endpoint base url is https://api.billbee.io/api/v1 ## Activation You have to enable the API in the s | Paid | Unknown | Yes | Profile | |
| BinaryEdge Provide access to BinaryEdge 40fy scanning platform | Freemium | API Key | No | Profile | |
| BitWarden Best open-source password manager | Freemium | OAuth | No | Profile | |
| Botd Botd is a browser library for JavaScript bot detection | Free | API Key | No | Profile | |
| Brain Web API This document describes the [Intellifi Brain](https://intellifi.zendesk.com/hc/en-us/categories/360000685454) Web API specification using the [OpenAPI specification](https://github.com/OAI/OpenAPI-Specification). The Bra | Paid | Unknown | Yes | Profile | |
| BrandLovers Marketplace API V1 API Allows sellers to: 1) Load products definitions to the BrandLovers marktplace. 2) Receive and update orders status. 3) Receive and update shipping information. 4) Receive and update customer tickets. All requests consume | Unknown | Unknown | Yes | Profile | |
| Bugcrowd Bugcrowd API for interacting and tracking the reported issues programmatically | Freemium | API Key | Yes | Profile | |
| Bugcrowd API Bugcrowd API: crowdsourced vulnerability disclosure, bug bounty programs, and security reports. | Paid | API Key | No | Profile | |
| CSR.plus API Generate certificate signing requests and private keys without OpenSSL | Free | API Key | Yes | Profile | |
| Car Registration API Car Registration API, An API that retrieves car information from its numberplate in many countries worldwide, uncluding the USA, UK, India, Australia and most of Europe. A username and password is required to access the | Free | Unknown | Yes | Profile | |
| Censys Search engine for Internet connected host and devices | Freemium | API Key | No | Profile | |
| Classify Encrypting & decrypting text messages | Free | No | No | Profile | |
| Classify API Encrypting & decrypting text messages | Unknown | Unknown | Yes | Profile | |
| Complete Criminal Checks Provides data of offenders from all U.S. States and Puerto Rico | Paid | API Key | No | Profile | |
| ConfigCat Public Management API **Base API URL**: https://api.configcat.com If you prefer the swagger documentation, you can find it here: [Swagger UI](https://api.configcat.com/swagger). The purpose of this API is to access the ConfigCat platform prog | Free | Unknown | Yes | Profile | |
| Credas API Credas API public API. | Free | Unknown | Yes | Profile | |
| CyCAT.org API CyCAT - The Cybersecurity Resource Catalogue public API services. | Unknown | Unknown | Yes | Profile | |
| Dataflow Kit Web Scraper API Render Javascript driven pages, while we internally manage Headless Chrome and proxies for you. - Build a custom web scraper with our Visual point-and-click toolkit. - Scrape the most popular Search engines result pages | Free | Unknown | Yes | Profile | |
| Dehash.lt API Hash decryption MD5, SHA1, SHA3, SHA256, SHA384, SHA512 | Unknown | API Key | Unknown | Profile | |
| Domain Intelligence API DNS, WHOIS/RDAP, SSL, subdomain enumeration, and email security in one parallel call | Free | API Key | No | Profile | |
| EmailRep Email address threat and risk prediction | Freemium | No | No | Profile | |
| Escape An API for escaping different kind of queries | Freemium | No | No | Profile | |
| Events API 1Password Events API Specification. | Paid | API Key | Yes | Profile | |
| Ex Libris APIs API For more information on how to use these APIs, including how to create an API key required for authentication, see [Alma REST APIs](https://developers.exlibrisgroup.com/alma/apis). | Unknown | Unknown | Yes | Profile | |
| FilterLists Lists of filters for adblockers and firewalls | Free | No | No | Profile | |
| FingerprintJS Pro Fraud detection API offering highly accurate browser fingerprinting | Paid | API Key | No | Profile | |
| FraudLabs Pro Screen order information using AI to detect frauds | Freemium | API Key | No | Profile | |
| FullHunt Searchable attack surface database of the entire internet | Freemium | API Key | Yes | Profile | |
| GitGuardian Scan files for secrets (API Keys, database credentials) | Freemium | API Key | No | Profile | |
| Google Access Approval API Official Google Access Approval API REST API (v1) discovered via Google APIs Discovery Service. | Free | Unknown | Yes | Profile | |
| Google Access Context Manager API Official Google Access Context Manager API REST API (v1) discovered via Google APIs Discovery Service. | Free | Unknown | Yes | Profile | |
| Google Agent Identity API Official Google Agent Identity API REST API (v1alpha) discovered via Google APIs Discovery Service. | Free | Unknown | Yes | Profile | |
| Google Agent Identity Credentials API Official Google Agent Identity Credentials API REST API (v1alpha) discovered via Google APIs Discovery Service. | Free | Unknown | Yes | Profile | |
| Google Certificate Authority API Official Google Certificate Authority API REST API (v1beta1) discovered via Google APIs Discovery Service. | Paid | Unknown | Yes | Profile | |
| Google Certificate Manager API Official Google Certificate Manager API REST API (v1) discovered via Google APIs Discovery Service. | Free | Unknown | Yes | Profile | |
| Google Chrome Verified Access API Official Google Chrome Verified Access API REST API (v1) discovered via Google APIs Discovery Service. | Unknown | Unknown | Yes | Profile | |
| Google Cloud Identity API Official Google Cloud Identity API REST API (v1beta1) discovered via Google APIs Discovery Service. | Paid | Unknown | Yes | Profile | |
| Google Cloud Identity-Aware Proxy API Official Google Cloud Identity-Aware Proxy API REST API (v1beta1) discovered via Google APIs Discovery Service. | Paid | Unknown | Yes | Profile | |
| Google Cloud Key Management Service (KMS) API Official Google Cloud Key Management Service (KMS) API REST API (v1) discovered via Google APIs Discovery Service. | Paid | Unknown | Yes | Profile | |
| Google IAM Service Account Credentials API Official Google IAM Service Account Credentials API REST API (v1) discovered via Google APIs Discovery Service. | Free | API Key | Yes | Profile | |
| Google Identity Toolkit API Official Google Identity Toolkit API REST API (v1) discovered via Google APIs Discovery Service. | Free | Unknown | Yes | Profile | |
| Google Identity and Access Management (IAM) API Official Google Identity and Access Management (IAM) API REST API (v2beta) discovered via Google APIs Discovery Service. | Paid | Unknown | Yes | Profile | |
| Google KMS Inventory API Official Google KMS Inventory API REST API (v1) discovered via Google APIs Discovery Service. | Paid | Unknown | Yes | Profile | |
| Google Parameter Manager API Official Google Parameter Manager API REST API (v1) discovered via Google APIs Discovery Service. | Free | Unknown | Yes | Profile | |
| Google Policy Simulator API Official Google Policy Simulator API REST API (v1alpha) discovered via Google APIs Discovery Service. | Free | Unknown | Yes | Profile | |
| Google Policy Troubleshooter API Official Google Policy Troubleshooter API REST API (v1beta) discovered via Google APIs Discovery Service. | Paid | Unknown | Yes | Profile | |
| Google Public Certificate Authority API Official Google Public Certificate Authority API REST API (v1alpha1) discovered via Google APIs Discovery Service. | Free | Unknown | Yes | Profile | |
| Google Secret Manager API Official Google Secret Manager API REST API (v1beta1) discovered via Google APIs Discovery Service. | Paid | Unknown | Yes | Profile | |
| Google Serverless VPC Access API Official Google Serverless VPC Access API REST API (v1beta1) discovered via Google APIs Discovery Service. | Free | Unknown | Yes | Profile | |
| Google Smart Device Management API Official Google Smart Device Management API REST API (v1) discovered via Google APIs Discovery Service. | Unknown | Unknown | Yes | Profile | |
| GreyNoise Query IPs in the GreyNoise dataset and retrieve a subset of the full IP context data | Freemium | API Key | No | Profile | |
| GreyNoise API GreyNoise Intelligence API for identifying mass-internet scan noise, enriching IPs with context about scanners and benign/malicious classification. | Freemium | API Key | No | Profile | |
| HackerOne The industry’s first hacker API that helps increase productivity towards creative bug bounty hunting | Freemium | API Key | No | Profile | |
| HaveIBeenPwned Passwords which have previously been exposed in data breaches | Freemium | API Key | No | Profile | |
| Hubhopper Partner Integration API(s) - Production API This is an interactive document explaining the API(s) that could be used to fetch data from [Hubhopper](https://hubhopper.com). Use the api key provided to authorize `x-api-key` and test the API(s). The output data model | Unknown | Unknown | Yes | Profile |
Start with pricing and auth: free tiers and no-auth APIs are fastest to prototype with. Then check CORS if your app calls the API from the browser, and health before you commit — a great API that's been down for a week will block your launch. Each profile below shows all of these signals plus rate limits where documented.