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 normalization across disparate services. This collection includes API marketplaces like RapidAPI, unified API platforms like Merge and Apideck, API directories like APIs.guru and APIs.io, web scraping aggregators, and open-source catalog tools like Backstage.

Aggregation is profiled on the APIs.io network. Tagged areas include API Aggregation, API Directory, and API Marketplace.

The Aggregation catalog on APIs.io includes 1 JSON-LD context.

Aggregation’s developer surface includes developer portal and 1 more developer resources.

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8.7/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-10-17 · rubric v0.24.0

0 APIs 6 Features 5 Use Cases

API Aggregation API Directory API Marketplace

Kin Score

Kin Score How this is scored →
scored 2026-10-17 · rubric v0.24.0

Composite quality — 8.7/100 · minimal

Contract Quality 3.1 / 21

Developer Ergonomics 1.6 / 17

Access Clarity 0.0 / 17

Operational Transparency 0.6 / 11

Contract Governance 0.0 / 10

Discoverability 3.3 / 9

Regulatory Posture 0.7 / 15

Agent readiness — 0/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/aggregation: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Features 6

Notable capabilities this provider offers.

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.

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Aggregation Context

5 classes · 12 properties

JSON-LD

JSON Schema 2

Standalone JSON Schema definitions for this provider's data models.

APICatalogEntry

10 properties

JSON SCHEMA

UnifiedAPI

7 properties

JSON SCHEMA

JSON Structure 2

JSON Structure definitions describing this provider's data shapes.

Aggregation Api Catalog Entry Structure

10 properties

JSON STRUCTURE

Aggregation Unified Api Structure

7 properties

JSON STRUCTURE

Examples 2

Example request and response payloads for these APIs.

Aggregation Api Catalog Entry Example

10 fields

EXAMPLE

Aggregation Unified Api Example

7 fields

EXAMPLE

Use Cases 5

What developers build with this provider.

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.

Integrations 8

Pre-built integrations with other platforms and tools.

RapidAPI

The largest API marketplace with 40,000+ APIs available to developers through a unified subscription and API key model.

Merge

Unified API for HR, payroll, accounting, CRM, and ATS integrations across 100+ providers.

Apideck

Unified API platform for CRM, file storage, accounting, and e-commerce integrations.

Composio

API aggregation platform enabling AI agents to use 100+ apps as structured tools.

Backstage

Open-source developer portal and API catalog platform from Spotify for internal service discovery.

APIs.guru

Open-source directory of machine-readable API specifications (OpenAPI) maintained by the community.

Plaid

Financial data aggregation platform connecting apps to bank accounts and financial institutions.

Nango

Open-source unified API for OAuth integrations across 200+ apps.

Scroll for all 8

Resources

Get Started 1

Portal, sign-up, and the first successful call

Portal

Portal

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Source (apis.yml)

aid: aggregation
name: Aggregation
description: 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 normalization across disparate services. This collection includes
  API marketplaces like RapidAPI, unified API platforms like Merge and Apideck, API directories like APIs.guru and APIs.io,
  web scraping aggregators, and open-source catalog tools like Backstage.
type: Index
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
tags:
- API Aggregation
- API Directory
- API Marketplace
url: https://raw.githubusercontent.com/api-evangelist/aggregation/refs/heads/main/apis.yml
created: '2026-03-26'
modified: '2026-04-19'
specificationVersion: '0.19'
apis: []
network:
- name: Alloy Automation
  url: https://raw.githubusercontent.com/api-evangelist/alloy-automation/refs/heads/main/apis.yml
- name: Any-API
  url: https://raw.githubusercontent.com/api-evangelist/any-api/refs/heads/main/apis.yml
- name: API Harmony
  url: https://raw.githubusercontent.com/api-evangelist/api-harmony/refs/heads/main/apis.yml
- name: API Layer
  url: https://raw.githubusercontent.com/api-evangelist/api-layer/refs/heads/main/apis.yml
- name: API Stack
  url: https://raw.githubusercontent.com/api-evangelist/api-stack/refs/heads/main/apis.yml
- name: Apideck
  url: https://raw.githubusercontent.com/api-evangelist/apideck/refs/heads/main/apis.yml
- name: Apify
  url: https://raw.githubusercontent.com/api-evangelist/apify/refs/heads/main/apis.yml
- name: APIpark
  url: https://raw.githubusercontent.com/api-evangelist/apipark/refs/heads/main/apis.yml
- name: APIs.guru
  url: https://raw.githubusercontent.com/api-evangelist/apis-guru/refs/heads/main/apis.yml
- name: APIs.io
  url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/apis.yml
- name: APIs.json
  url: https://raw.githubusercontent.com/api-evangelist/apis-json/refs/heads/main/apis.yml
- name: Backstage
  url: https://raw.githubusercontent.com/api-evangelist/backstage/refs/heads/main/apis.yml
- name: Blobr
  url: https://raw.githubusercontent.com/api-evangelist/blobr/refs/heads/main/apis.yml
- name: Bright Data
  url: https://raw.githubusercontent.com/api-evangelist/bright-data/refs/heads/main/apis.yml
- name: Codat
  url: https://raw.githubusercontent.com/api-evangelist/codat/refs/heads/main/apis.yml
- name: Composio
  url: https://raw.githubusercontent.com/api-evangelist/composio/refs/heads/main/apis.yml
- name: Datafiniti
  url: https://raw.githubusercontent.com/api-evangelist/datafiniti/refs/heads/main/apis.yml
- name: DigitalAPI
  url: https://raw.githubusercontent.com/api-evangelist/digitalapi/refs/heads/main/apis.yml
- name: Diffbot
  url: https://raw.githubusercontent.com/api-evangelist/diffbot/refs/heads/main/apis.yml
- name: Finverse
  url: https://raw.githubusercontent.com/api-evangelist/finverse/refs/heads/main/apis.yml
- name: Hotglue
  url: https://raw.githubusercontent.com/api-evangelist/hotglue/refs/heads/main/apis.yml
- name: Import.io
  url: https://raw.githubusercontent.com/api-evangelist/import-io/refs/heads/main/apis.yml
- name: Merge
  url: https://raw.githubusercontent.com/api-evangelist/merge/refs/heads/main/apis.yml
- name: Nango
  url: https://raw.githubusercontent.com/api-evangelist/nango/refs/heads/main/apis.yml
- name: Optic
  url: https://raw.githubusercontent.com/api-evangelist/optic/refs/heads/main/apis.yml
- name: Paragon
  url: https://raw.githubusercontent.com/api-evangelist/paragon/refs/heads/main/apis.yml
- name: Plaid
  url: https://raw.githubusercontent.com/api-evangelist/plaid/refs/heads/main/apis.yml
- name: Postman
  url: https://raw.githubusercontent.com/api-evangelist/postman/refs/heads/main/apis.yml
- name: ProgrammableWeb
  url: https://raw.githubusercontent.com/api-evangelist/programmableweb/refs/heads/main/apis.yml
- name: Public APIs
  url: https://raw.githubusercontent.com/api-evangelist/public-apis/refs/heads/main/apis.yml
- name: RapidAPI
  url: https://raw.githubusercontent.com/api-evangelist/rapidapi/refs/heads/main/apis.yml
- name: Rutter
  url: https://raw.githubusercontent.com/api-evangelist/rutter/refs/heads/main/apis.yml
- name: SaaSHub
  url: https://raw.githubusercontent.com/api-evangelist/saashub/refs/heads/main/apis.yml
- name: ScrapingBee
  url: https://raw.githubusercontent.com/api-evangelist/scrapingbee/refs/heads/main/apis.yml
- name: SmartBear
  url: https://raw.githubusercontent.com/api-evangelist/smartbear/refs/heads/main/apis.yml
- name: Stoplight
  url: https://raw.githubusercontent.com/api-evangelist/stoplight/refs/heads/main/apis.yml
- name: SwaggerHub
  url: https://raw.githubusercontent.com/api-evangelist/swaggerhub/refs/heads/main/apis.yml
- name: Tray.io
  url: https://raw.githubusercontent.com/api-evangelist/tray-io/refs/heads/main/apis.yml
- name: Unified.to
  url: https://raw.githubusercontent.com/api-evangelist/unified-to/refs/heads/main/apis.yml
- name: Vessel
  url: https://raw.githubusercontent.com/api-evangelist/vessel/refs/heads/main/apis.yml
- name: Workato
  url: https://raw.githubusercontent.com/api-evangelist/workato/refs/heads/main/apis.yml
- name: Zyla
  url: https://raw.githubusercontent.com/api-evangelist/zyla/refs/heads/main/apis.yml
common:
- type: Portal
  url: https://apievangelist.com
- type: GitHubOrganization
  url: https://github.com/api-evangelist
- type: Features
  data:
  - name: Unified API Interface
    description: API aggregation platforms expose multiple underlying APIs through a single, standardized interface, reducing
      the integration burden for developers.
  - name: API Marketplaces and Discovery
    description: API directories and marketplaces like RapidAPI, APIs.guru, and APIs.io help developers discover, evaluate,
      and subscribe to APIs from multiple providers.
  - name: Data Normalization
    description: Unified API platforms like Merge and Apideck normalize data schemas across disparate HR, CRM, and accounting
      systems into a consistent model.
  - name: Authentication Abstraction
    description: Aggregation layers handle OAuth, API keys, and other authentication flows across multiple providers, presenting
      a single auth interface to the consumer.
  - name: API Catalogs and Internal Discovery
    description: Internal API catalog tools like Backstage and Stoplight enable organizations to document, discover, and govern
      APIs across the enterprise.
  - name: Web Scraping as API
    description: Platforms like Bright Data, Apify, and ScrapingBee aggregate web data and expose it through structured APIs,
      removing the need for custom scraper maintenance.
- type: UseCases
  data:
  - name: Unified HR and CRM Integration
    description: Unified API platforms like Merge and Apideck enable applications to sync with dozens of HR systems (BambooHR,
      Workday, ADP) through a single normalized API.
  - name: API Marketplace Distribution
    description: API providers publish their APIs to marketplaces like RapidAPI to reach new developer audiences and monetize
      access through tiered subscription plans.
  - name: Internal API Governance
    description: Organizations use API catalogs like Backstage or Stoplight to document, version, and govern internal APIs
      across product teams.
  - name: Financial Data Aggregation
    description: Platforms like Plaid and Codat aggregate financial account data from banks and accounting systems into normalized
      APIs for fintech applications.
  - name: AI Agent Tool Federation
    description: Aggregation platforms like Composio expose hundreds of third-party APIs as unified tool sets that AI agents
      can discover and invoke.
- type: Integrations
  data:
  - name: RapidAPI
    description: The largest API marketplace with 40,000+ APIs available to developers through a unified subscription and
      API key model.
  - name: Merge
    description: Unified API for HR, payroll, accounting, CRM, and ATS integrations across 100+ providers.
  - name: Apideck
    description: Unified API platform for CRM, file storage, accounting, and e-commerce integrations.
  - name: Composio
    description: API aggregation platform enabling AI agents to use 100+ apps as structured tools.
  - name: Backstage
    description: Open-source developer portal and API catalog platform from Spotify for internal service discovery.
  - name: APIs.guru
    description: Open-source directory of machine-readable API specifications (OpenAPI) maintained by the community.
  - name: Plaid
    description: Financial data aggregation platform connecting apps to bank accounts and financial institutions.
  - name: Nango
    description: Open-source unified API for OAuth integrations across 200+ apps.
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
humanURL: https://apievangelist.com

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