SimilarWeb

SimilarWeb is a digital intelligence platform offering a REST API for accessing website traffic estimates, audience demographics, keyword analytics, competitive benchmarking, app intelligence data, and lead generation insights. The API provides real-time and historical data covering traffic sources, search behavior, technographics, e-commerce shopper intelligence, and firmographic company data, enabling developers to integrate market intelligence into applications, dashboards, and data pipelines. The current generation is API V5, launched March 2026, which unified the REST and Batch API keys, added multi-metric requests, and shipped a first-party hosted MCP server at mcp.similarweb.com for AI agents; legacy v1-v4 REST endpoints carry a published sunset date of 2026-10-06.

SimilarWeb publishes 13 APIs on the APIs.io network, including Account API, App Intelligence API, Credits API, and 10 more. Tagged areas include Digital Intelligence, Web Analytics, Traffic Analytics, Competitive Intelligence, and Keyword Analytics.

The SimilarWeb catalog on APIs.io includes 1 event-driven AsyncAPI specification, 1 JSON-LD context, and 1 Spectral governance ruleset.

SimilarWeb’s developer surface includes authentication, documentation, engineering blog, pricing, changelog, API reference, getting-started guide, and 36 more developer resources.

🌐 Visit website 📡 Source on GitHub

67.0/100 exemplar ▬ flat Agent 50/100 agent ready saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

AccessPaidSelf serve

2 APIs 1 MCP Servers

Digital IntelligenceWeb AnalyticsTraffic AnalyticsCompetitive IntelligenceKeyword AnalyticsAudience DemographicsApp Intelligence Market Research E-Commerce SEO

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 67.0/100 · exemplar

Contract Quality 16.0 / 23

Developer Ergonomics 10.6 / 18

Access Clarity 16.8 / 18

Operational Transparency 7.7 / 12

Contract Governance 3.0 / 11

Discoverability 6.8 / 9

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 50/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 6 / 6

Agent Skills 5 / 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 6 / 6

Protected Resource Metadata 5 / 5

Registration Without a Human 6 / 6

Agentic Commerce Well-Known Document 0 / 5

Create-or-Update Ergonomics applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

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/similarweb: 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 →

APIs 14

Individual APIs this provider publishes, each with its own machine-readable definition.

SimilarWeb Batch API

The SimilarWeb Batch API is optimized for large-scale bulk data extraction, supporting jobs of up to one million domains per request. It delivers data asynchronously to cloud st...

SimilarWeb Account API

Account credits, capabilities, and usage information

SimilarWeb App Intelligence API

Mobile app downloads, active users, sessions, and demographics

SimilarWeb Credits API

Batch API credit management

SimilarWeb Geography API

Geographic distribution of website traffic

SimilarWeb Integrations API

Manage cloud storage integrations (S3, GCS, Snowflake)

SimilarWeb Keywords API

Keyword analytics including organic and paid keyword data

SimilarWeb Lead Enrichment API

Lead enrichment combining firmographics and web analytics

SimilarWeb Rankings API

Global, country, and industry rank data

SimilarWeb Reports API

Submit, track, and retrieve bulk data report requests

SimilarWeb Similar Sites API

Similar website discovery

SimilarWeb Traffic and Engagement API

Website traffic visits, bounce rate, pages per visit, visit duration

SimilarWeb Traffic Sources API

Marketing channel traffic breakdown including organic, paid, referral, social, and display

SimilarWeb Webhooks API

Webhook subscription management for data-ready notifications

Scroll for all 14

Open Collections 14

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

API Collection

OPEN COLLECTION

SimilarWeb Batch Account API

OPEN COLLECTION

SimilarWeb Batch Account App Intelligence API

OPEN COLLECTION

SimilarWeb Batch Account Credits API

OPEN COLLECTION

SimilarWeb Batch Account Geography API

OPEN COLLECTION

SimilarWeb Batch Account Integrations API

OPEN COLLECTION

SimilarWeb Batch Account Keywords API

OPEN COLLECTION

SimilarWeb Batch Account Lead Enrichment API

OPEN COLLECTION

SimilarWeb Batch Account Rankings API

OPEN COLLECTION

SimilarWeb Batch Account Reports API

OPEN COLLECTION

SimilarWeb Batch Account Similar Sites API

OPEN COLLECTION

SimilarWeb Batch Account Traffic and Engagement API

OPEN COLLECTION

SimilarWeb Batch Account Traffic Sources API

OPEN COLLECTION

SimilarWeb Batch Account Webhooks API

OPEN COLLECTION

Scroll for all 14

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

SimilarWeb MCP Server

Similarweb operates a first-party hosted (remote) MCP server at https://mcp.similarweb.com that exposes its Web, Search and App intelligence datasets as MCP tools. It is not an ...

MCP SERVER

Pricing Plans 1

Published pricing tiers and plan structures.

Similarweb Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Similarweb Rate Limits

3 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Similarweb Finops

FINOPS

Event Specifications 1

AsyncAPI definitions for this provider's event-driven and streaming APIs.

Similarweb Webhooks

ASYNCAPI

Semantic Vocabularies 1

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

Similarweb Context

7 classes · 49 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

SimilarWeb API Rules

6 rules · 5 warnings 1 info

SPECTRAL

JSON Schema 2

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

SimilarWeb Geography Response

2 properties

JSON SCHEMA

SimilarWeb Traffic and Engagement Response

6 properties

JSON SCHEMA

Examples 3

Example request and response payloads for these APIs.

Similarweb Batch Request Example

2 fields

EXAMPLE

Similarweb Geography Example

2 fields

EXAMPLE

Similarweb Visits Desktop Example

2 fields

EXAMPLE

Security Posture 3

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Similarweb Authentication

apiKey/http · 3 schemes

SECURITY

Similarweb Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Similarweb Trust Center

SOC 2 Type II, ISO 27001

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Similarweb Scopes

1 scope · authorizationCode

1 scopes

SCOPES

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Similarweb Agentic Access

27 operations · 8 acting

AGENTIC

Resources

Get Started 4

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

SignUp

SignUp

Login

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 5

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

WellKnown

MCPServer

LLMsTxt

AgentSkill

Design & Contract 7

Pagination, idempotency, versioning, errors, and events

Conventions

ErrorCatalog

Lifecycle

Conformance

DataModel

Components

Webhooks

Scroll for all 7

Build 3

SDKs, sample code, and the tooling you integrate with

ToolCrosswalk

ToolCrosswalk

Packages

Packages

GitHubOrganization

GitHubOrganization

Access & Security 6

Authentication, authorization, and security posture

DomainSecurity

Authentication

Compliance

TrustCenter

OAuthScopes

Authentication

Operate 5

Status, limits, changes, and where to get help

RateLimits

Deprecation

ChangeLog

Support

HelpCenter

Commercial 5

Pricing, plans, and the legal terms of use

Pricing

Plans

FinOps

TermsOfService

PrivacyPolicy

Company 3

The organization behind the API

Website

Website

LinkedIn

Blog

Blog

Other 3

Properties that don't map to a standard resource type

Overlay

Overlay

Overlay

Overlay

Source (apis.yml)

aid: similarweb
name: SimilarWeb
description: SimilarWeb is a digital intelligence platform offering a REST API for accessing website traffic estimates, audience
  demographics, keyword analytics, competitive benchmarking, app intelligence data, and lead generation insights. The API
  provides real-time and historical data covering traffic sources, search behavior, technographics, e-commerce shopper intelligence,
  and firmographic company data, enabling developers to integrate market intelligence into applications, dashboards, and data
  pipelines. The current generation is API V5, launched March 2026, which unified the REST and Batch API keys, added multi-metric
  requests, and shipped a first-party hosted MCP server at mcp.similarweb.com for AI agents; legacy v1-v4 REST endpoints carry
  a published sunset date of 2026-10-06.
type: Index
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: paid
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Paid · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/similarweb.png
url: https://raw.githubusercontent.com/api-evangelist/similarweb/refs/heads/main/apis.yml
created: '2026-06-13'
modified: '2026-08-13'
specificationVersion: '0.23'
tags:
- Digital Intelligence
- Web Analytics
- Traffic Analytics
- Competitive Intelligence
- Keyword Analytics
- Audience Demographics
- App Intelligence
- Market Research
- E-Commerce
- SEO
tags_raw:
- Digital Intelligence
- Web Analytics
- Traffic Analytics
- Competitive Intelligence
- Keyword Analytics
- Audience Demographics
- App Intelligence
- Market Research
- E-commerce
- SEO
apis:
- aid: similarweb:similarweb-batch-api
  name: SimilarWeb Batch API
  description: The SimilarWeb Batch API is optimized for large-scale bulk data extraction, supporting jobs of up to one million
    domains per request. It delivers data asynchronously to cloud storage destinations including Amazon S3, Google Cloud Storage,
    and Snowflake. It is ideal for historical analysis, data warehouse ingestion, and large-scale competitive research workflows.
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://developers.similarweb.com/
  baseURL: https://api.similarweb.com
  tags:
  - Batch Processing
  - Bulk Data
  - Data Export
  - Snowflake
  - Amazon S3
  properties:
  - type: Documentation
    url: https://developers.similarweb.com/
  - type: GettingStarted
    url: https://developers.similarweb.com/docs/getting-started
  contact:
  - FN: SimilarWeb Support
    url: https://support.similarweb.com/hc/en-us/articles/22089555897373-REST-API
    email: ''
- aid: similarweb:similarweb-account-api
  name: SimilarWeb Account API
  description: Account credits, capabilities, and usage information
  humanURL: https://developers.similarweb.com/
  baseURL: https://api.similarweb.com
  tags:
  - Account
  properties:
  - type: OpenAPI
    url: openapi/similarweb-account-api-openapi.yml
  - type: Documentation
    url: https://developers.similarweb.com/
  - type: GettingStarted
    url: https://developers.similarweb.com/docs/getting-started
  - type: Authentication
    url: https://developers.similarweb.com/docs/authentication
  - type: RateLimits
    url: https://developers.similarweb.com/docs/rate-limit
- aid: similarweb:similarweb-app-intelligence-api
  name: SimilarWeb App Intelligence API
  description: Mobile app downloads, active users, sessions, and demographics
  humanURL: https://developers.similarweb.com/
  baseURL: https://api.similarweb.com
  tags:
  - App Intelligence
  properties:
  - type: OpenAPI
    url: openapi/similarweb-app-intelligence-api-openapi.yml
  - type: Documentation
    url: https://developers.similarweb.com/
  - type: GettingStarted
    url: https://developers.similarweb.com/docs/getting-started
  - type: Authentication
    url: https://developers.similarweb.com/docs/authentication
  - type: RateLimits
    url: https://developers.similarweb.com/docs/rate-limit
- aid: similarweb:similarweb-credits-api
  name: SimilarWeb Credits API
  description: Batch API credit management
  humanURL: https://developers.similarweb.com/
  baseURL: https://api.similarweb.com
  tags:
  - Credits
  properties:
  - type: OpenAPI
    url: openapi/similarweb-credits-api-openapi.yml
  - type: Documentation
    url: https://developers.similarweb.com/
  - type: GettingStarted
    url: https://developers.similarweb.com/docs/getting-started
  - type: Authentication
    url: https://developers.similarweb.com/docs/authentication
  - type: RateLimits
    url: https://developers.similarweb.com/docs/rate-limit
- aid: similarweb:similarweb-geography-api
  name: SimilarWeb Geography API
  description: Geographic distribution of website traffic
  humanURL: https://developers.similarweb.com/
  baseURL: https://api.similarweb.com
  tags:
  - Geography
  properties:
  - type: OpenAPI
    url: openapi/similarweb-geography-api-openapi.yml
  - type: Documentation
    url: https://developers.similarweb.com/
  - type: GettingStarted
    url: https://developers.similarweb.com/docs/getting-started
  - type: Authentication
    url: https://developers.similarweb.com/docs/authentication
  - type: RateLimits
    url: https://developers.similarweb.com/docs/rate-limit
- aid: similarweb:similarweb-integrations-api
  name: SimilarWeb Integrations API
  description: Manage cloud storage integrations (S3, GCS, Snowflake)
  humanURL: https://developers.similarweb.com/
  baseURL: https://api.similarweb.com
  tags:
  - Integration
  tags_raw:
  - Integrations
  properties:
  - type: OpenAPI
    url: openapi/similarweb-integrations-api-openapi.yml
  - type: Documentation
    url: https://developers.similarweb.com/
  - type: GettingStarted
    url: https://developers.similarweb.com/docs/getting-started
  - type: Authentication
    url: https://developers.similarweb.com/docs/authentication
  - type: RateLimits
    url: https://developers.similarweb.com/docs/rate-limit
- aid: similarweb:similarweb-keywords-api
  name: SimilarWeb Keywords API
  description: Keyword analytics including organic and paid keyword data
  humanURL: https://developers.similarweb.com/
  baseURL: https://api.similarweb.com
  tags:
  - Keywords
  properties:
  - type: OpenAPI
    url: openapi/similarweb-keywords-api-openapi.yml
  - type: Documentation
    url: https://developers.similarweb.com/
  - type: GettingStarted
    url: https://developers.similarweb.com/docs/getting-started
  - type: Authentication
    url: https://developers.similarweb.com/docs/authentication
  - type: RateLimits
    url: https://developers.similarweb.com/docs/rate-limit
- aid: similarweb:similarweb-lead-enrichment-api
  name: SimilarWeb Lead Enrichment API
  description: Lead enrichment combining firmographics and web analytics
  humanURL: https://developers.similarweb.com/
  baseURL: https://api.similarweb.com
  tags:
  - Lead Enrichment
  properties:
  - type: OpenAPI
    url: openapi/similarweb-lead-enrichment-api-openapi.yml
  - type: Documentation
    url: https://developers.similarweb.com/
  - type: GettingStarted
    url: https://developers.similarweb.com/docs/getting-started
  - type: Authentication
    url: https://developers.similarweb.com/docs/authentication
  - type: RateLimits
    url: https://developers.similarweb.com/docs/rate-limit
- aid: similarweb:similarweb-rankings-api
  name: SimilarWeb Rankings API
  description: Global, country, and industry rank data
  humanURL: https://developers.similarweb.com/
  baseURL: https://api.similarweb.com
  tags:
  - Rankings
  properties:
  - type: OpenAPI
    url: openapi/similarweb-rankings-api-openapi.yml
  - type: Documentation
    url: https://developers.similarweb.com/
  - type: GettingStarted
    url: https://developers.similarweb.com/docs/getting-started
  - type: Authentication
    url: https://developers.similarweb.com/docs/authentication
  - type: RateLimits
    url: https://developers.similarweb.com/docs/rate-limit
- aid: similarweb:similarweb-reports-api
  name: SimilarWeb Reports API
  description: Submit, track, and retrieve bulk data report requests
  humanURL: https://developers.similarweb.com/
  baseURL: https://api.similarweb.com
  tags:
  - Reports
  properties:
  - type: OpenAPI
    url: openapi/similarweb-reports-api-openapi.yml
  - type: Documentation
    url: https://developers.similarweb.com/
  - type: GettingStarted
    url: https://developers.similarweb.com/docs/getting-started
  - type: Authentication
    url: https://developers.similarweb.com/docs/authentication
  - type: RateLimits
    url: https://developers.similarweb.com/docs/rate-limit
- aid: similarweb:similarweb-similar-sites-api
  name: SimilarWeb Similar Sites API
  description: Similar website discovery
  humanURL: https://developers.similarweb.com/
  baseURL: https://api.similarweb.com
  tags:
  - Similar Sites
  properties:
  - type: OpenAPI
    url: openapi/similarweb-similar-sites-api-openapi.yml
  - type: Documentation
    url: https://developers.similarweb.com/
  - type: GettingStarted
    url: https://developers.similarweb.com/docs/getting-started
  - type: Authentication
    url: https://developers.similarweb.com/docs/authentication
  - type: RateLimits
    url: https://developers.similarweb.com/docs/rate-limit
- aid: similarweb:similarweb-traffic-and-engagement-api
  name: SimilarWeb Traffic and Engagement API
  description: Website traffic visits, bounce rate, pages per visit, visit duration
  humanURL: https://developers.similarweb.com/
  baseURL: https://api.similarweb.com
  tags:
  - Traffic and Engagement
  properties:
  - type: OpenAPI
    url: openapi/similarweb-traffic-and-engagement-api-openapi.yml
  - type: Documentation
    url: https://developers.similarweb.com/
  - type: GettingStarted
    url: https://developers.similarweb.com/docs/getting-started
  - type: Authentication
    url: https://developers.similarweb.com/docs/authentication
  - type: RateLimits
    url: https://developers.similarweb.com/docs/rate-limit
- aid: similarweb:similarweb-traffic-sources-api
  name: SimilarWeb Traffic Sources API
  description: Marketing channel traffic breakdown including organic, paid, referral, social, and display
  humanURL: https://developers.similarweb.com/
  baseURL: https://api.similarweb.com
  tags:
  - Traffic Sources
  properties:
  - type: OpenAPI
    url: openapi/similarweb-traffic-sources-api-openapi.yml
  - type: Documentation
    url: https://developers.similarweb.com/
  - type: GettingStarted
    url: https://developers.similarweb.com/docs/getting-started
  - type: Authentication
    url: https://developers.similarweb.com/docs/authentication
  - type: RateLimits
    url: https://developers.similarweb.com/docs/rate-limit
- aid: similarweb:similarweb-webhooks-api
  name: SimilarWeb Webhooks API
  description: Webhook subscription management for data-ready notifications
  humanURL: https://developers.similarweb.com/
  baseURL: https://api.similarweb.com
  tags:
  - Webhook
  tags_raw:
  - Webhooks
  properties:
  - type: OpenAPI
    url: openapi/similarweb-webhooks-api-openapi.yml
  - type: Documentation
    url: https://developers.similarweb.com/
  - type: GettingStarted
    url: https://developers.similarweb.com/docs/getting-started
  - type: Authentication
    url: https://developers.similarweb.com/docs/authentication
  - type: RateLimits
    url: https://developers.similarweb.com/docs/rate-limit
common:
- type: AgenticAccess
  url: agentic-access/similarweb-agentic-access.yml
- type: DomainSecurity
  url: security/similarweb-domain-security.yml
- type: Authentication
  url: authentication/similarweb-authentication.yml
- type: Website
  url: https://www.similarweb.com/
- type: Documentation
  url: https://developers.similarweb.com/
- type: LinkedIn
  url: https://www.linkedin.com/company/similarweb
- type: Blog
  url: https://www.similarweb.com/blog/
- type: Pricing
  url: https://www.similarweb.com/corp/daas/api/
- type: X
  url: https://x.com/similarweb
- type: Plans
  url: plans/similarweb-plans-pricing.yml
- type: RateLimits
  url: rate-limits/similarweb-rate-limits.yml
- type: FinOps
  url: finops/similarweb-finops.yml
- type: WellKnown
  url: well-known/similarweb-well-known.yml
- type: MCPServer
  url: mcp/similarweb-mcp.yml
- type: ToolCrosswalk
  url: mcp/similarweb-tool-crosswalk.yml
- type: LLMsTxt
  url: llms/similarweb-llms.txt
- type: Packages
  url: packages/similarweb-packages.yml
- type: Conventions
  url: conventions/similarweb-conventions.yml
- type: ErrorCatalog
  url: errors/similarweb-problem-types.yml
- type: Lifecycle
  url: lifecycle/similarweb-lifecycle.yml
- type: Deprecation
  url: https://docs.similarweb.com/api-v5/guides/rest-api-data-version-migration
- type: ChangeLog
  url: changelog/similarweb-changelog.yml
- type: Conformance
  url: conformance/similarweb-conformance.yml
- type: Compliance
  url: https://www.similarweb.com/corp/privacy-security/
- type: TrustCenter
  url: security/similarweb-trust-center.yml
- type: OAuthScopes
  url: scopes/similarweb-scopes.yml
- type: DataModel
  url: data-model/similarweb-data-model.yml
- type: Components
  url: components/similarweb-components.yml
- type: Webhooks
  url: asyncapi/similarweb-webhooks.yml
- type: AgentSkill
  url: skills/_index.yml
- type: Overlay
  url: overlays/similarweb-rest-api-overlay.yaml
- type: Overlay
  url: overlays/similarweb-batch-api-overlay.yaml
- type: DeveloperPortal
  url: https://docs.similarweb.com/api-v5/
- type: APIReference
  url: https://docs.similarweb.com/api-v5/api-reference/website-analysis-api
- type: GettingStarted
  url: https://docs.similarweb.com/api-v5/getting-started/making-your-first-request
- type: Authentication
  url: https://docs.similarweb.com/api-v5/getting-started/authentication
- type: Support
  url: https://support.similarweb.com/hc/en-us
- type: HelpCenter
  url: https://developers.similarweb.com/docs/getting-help
- type: GitHubOrganization
  url: https://github.com/similarweb
- type: SignUp
  url: https://account.similarweb.com/standard-api
- type: Login
  url: https://pro.similarweb.com/
- type: TermsOfService
  url: https://www.similarweb.com/corp/legal/terms/
- type: PrivacyPolicy
  url: https://www.similarweb.com/corp/legal/privacy-policy/
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
x-enrichment:
  date: '2026-08-13'
  status: enriched
  artifacts_added: 24
  pass: local-v1

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