# Aggregation

> An index and topic collection covering API aggregation, marketplaces, directories, unified APIs, and catalog platforms. API aggregation brings together multiple APIs under a single interface, simplifying integration, reducing maintenance overhead, and enabling consistent authentication and data n...

This is the **Aggregation** topic area of [API Evangelist](https://apievangelist.com) — a network of focused knowledge bases drawn from 16 years of independent API research by Kin Lane. Browse all areas at https://apievangelist.com/areas/.

## Services & Tools
- [Alloy Automation](https://providers.apis.io/providers/alloy-automation/) (repo: https://github.com/api-evangelist/alloy-automation)
- [Any-API](https://providers.apis.io/providers/any-api/) (repo: https://github.com/api-evangelist/any-api)
- [API Harmony](https://providers.apis.io/providers/api-harmony/) (repo: https://github.com/api-evangelist/api-harmony)
- [API Layer](https://providers.apis.io/providers/api-layer/) (repo: https://github.com/api-evangelist/api-layer)
- [API Stack](https://providers.apis.io/providers/api-stack/) (repo: https://github.com/api-evangelist/api-stack)
- [Apideck](https://providers.apis.io/providers/apideck/) (repo: https://github.com/api-evangelist/apideck)
- [Apify](https://providers.apis.io/providers/apify/) (repo: https://github.com/api-evangelist/apify)
- [APIpark](https://providers.apis.io/providers/apipark/) (repo: https://github.com/api-evangelist/apipark)
- [APIs.guru](https://providers.apis.io/providers/apis-guru/) (repo: https://github.com/api-evangelist/apis-guru)
- [APIs.io](https://providers.apis.io/providers/apis-io/) (repo: https://github.com/api-evangelist/apis-io)
- [APIs.json](https://providers.apis.io/providers/apis-json/) (repo: https://github.com/api-evangelist/apis-json)
- [Backstage](https://providers.apis.io/providers/backstage/) (repo: https://github.com/api-evangelist/backstage)
- [Blobr](https://providers.apis.io/providers/blobr/) (repo: https://github.com/api-evangelist/blobr)
- [Bright Data](https://providers.apis.io/providers/bright-data/) (repo: https://github.com/api-evangelist/bright-data)
- [Codat](https://providers.apis.io/providers/codat/) (repo: https://github.com/api-evangelist/codat)
- [Composio](https://providers.apis.io/providers/composio/) (repo: https://github.com/api-evangelist/composio)
- [Datafiniti](https://providers.apis.io/providers/datafiniti/) (repo: https://github.com/api-evangelist/datafiniti)
- [DigitalAPI](https://providers.apis.io/providers/digitalapi/) (repo: https://github.com/api-evangelist/digitalapi)
- [Diffbot](https://providers.apis.io/providers/diffbot/) (repo: https://github.com/api-evangelist/diffbot)
- [Finverse](https://providers.apis.io/providers/finverse/) (repo: https://github.com/api-evangelist/finverse)
- [Hotglue](https://providers.apis.io/providers/hotglue/) (repo: https://github.com/api-evangelist/hotglue)
- [Import.io](https://providers.apis.io/providers/import-io/) (repo: https://github.com/api-evangelist/import-io)
- [Merge](https://providers.apis.io/providers/merge/) (repo: https://github.com/api-evangelist/merge)
- [Nango](https://providers.apis.io/providers/nango/) (repo: https://github.com/api-evangelist/nango)
- [Optic](https://providers.apis.io/providers/optic/) (repo: https://github.com/api-evangelist/optic)
- [Paragon](https://providers.apis.io/providers/paragon/) (repo: https://github.com/api-evangelist/paragon)
- [Plaid](https://providers.apis.io/providers/plaid/) (repo: https://github.com/api-evangelist/plaid)
- [Postman](https://providers.apis.io/providers/postman/) (repo: https://github.com/api-evangelist/postman)
- [ProgrammableWeb](https://providers.apis.io/providers/programmableweb/) (repo: https://github.com/api-evangelist/programmableweb)
- [Public APIs](https://providers.apis.io/providers/public-apis/) (repo: https://github.com/api-evangelist/public-apis)
- [RapidAPI](https://providers.apis.io/providers/rapidapi/) (repo: https://github.com/api-evangelist/rapidapi)
- [Rutter](https://providers.apis.io/providers/rutter/) (repo: https://github.com/api-evangelist/rutter)
- [SaaSHub](https://providers.apis.io/providers/saashub/) (repo: https://github.com/api-evangelist/saashub)
- [ScrapingBee](https://providers.apis.io/providers/scrapingbee/) (repo: https://github.com/api-evangelist/scrapingbee)
- [SmartBear](https://providers.apis.io/providers/smartbear/) (repo: https://github.com/api-evangelist/smartbear)
- [Stoplight](https://providers.apis.io/providers/stoplight/) (repo: https://github.com/api-evangelist/stoplight)
- [SwaggerHub](https://providers.apis.io/providers/swaggerhub/) (repo: https://github.com/api-evangelist/swaggerhub)
- [Tray.io](https://providers.apis.io/providers/tray-io/) (repo: https://github.com/api-evangelist/tray-io)
- [Unified.to](https://providers.apis.io/providers/unified-to/) (repo: https://github.com/api-evangelist/unified-to)
- [Vessel](https://providers.apis.io/providers/vessel/) (repo: https://github.com/api-evangelist/vessel)
- [Workato](https://providers.apis.io/providers/workato/) (repo: https://github.com/api-evangelist/workato)
- [Zyla](https://providers.apis.io/providers/zyla/) (repo: https://github.com/api-evangelist/zyla)

## Common Features
- **Unified API Interface**: API aggregation platforms expose multiple underlying APIs through a single, standardized interface, reducing the integration burden for developers.
- **API Marketplaces and Discovery**: API directories and marketplaces like RapidAPI, APIs.guru, and APIs.io help developers discover, evaluate, and subscribe to APIs from multiple providers.
- **Data Normalization**: Unified API platforms like Merge and Apideck normalize data schemas across disparate HR, CRM, and accounting systems into a consistent model.
- **Authentication Abstraction**: Aggregation layers handle OAuth, API keys, and other authentication flows across multiple providers, presenting a single auth interface to the consumer.
- **API Catalogs and Internal Discovery**: Internal API catalog tools like Backstage and Stoplight enable organizations to document, discover, and govern APIs across the enterprise.
- **Web Scraping as API**: Platforms like Bright Data, Apify, and ScrapingBee aggregate web data and expose it through structured APIs, removing the need for custom scraper maintenance.

## Use Cases
- **Unified HR and CRM Integration**: Unified API platforms like Merge and Apideck enable applications to sync with dozens of HR systems (BambooHR, Workday, ADP) through a single normalized API.
- **API Marketplace Distribution**: API providers publish their APIs to marketplaces like RapidAPI to reach new developer audiences and monetize access through tiered subscription plans.
- **Internal API Governance**: Organizations use API catalogs like Backstage or Stoplight to document, version, and govern internal APIs across product teams.
- **Financial Data Aggregation**: Platforms like Plaid and Codat aggregate financial account data from banks and accounting systems into normalized APIs for fintech applications.
- **AI Agent Tool Federation**: Aggregation platforms like Composio expose hundreds of third-party APIs as unified tool sets that AI agents can discover and invoke.

## Related Areas
- [Plugin](https://plugin.apievangelist.com): An index and topic collection covering plugin, extension, and add-on architectures with public APIs and marketplaces....
- [Portal](https://portal.apievangelist.com): A curated index of services, tooling, and open source solutions for API developer portals, API catalogs, API marketpl...
- [Unified APIs](https://unified-apis.apievangelist.com): This is the index of unified API service and tooling repos being tracked by the API Evangelist network. Unified APIs ...
- [Logging](https://logging.apievangelist.com): An index and topic collection covering log ingestion, log search, log aggregation, and log pipeline services. Logging...

## More
- [Latest Aggregation stories](/stories/)
- [All API Evangelist topic areas](https://apievangelist.com/areas/)
- [API Evangelist network index (llms.txt)](https://apievangelist.com/llms.txt)