# SimilarWeb

**Canonical:** https://apis.io/providers/similarweb/  
**Website:** https://www.similarweb.com/  
**APIs profiled:** 14

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.

## Kin Score — 71.5 / 100 (exemplar)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 71.5).

| Facet | Score |
|---|---|
| Discoverability | 92.6 |
| Contract Quality | 73.8 |
| Governance | 40.2 |
| Contract Governance | 40.2 |
| Operational Transparency | 65.8 |
| Developer Ergonomics | 58.9 |
| Commercial Clarity | 93.4 |
| Access Clarity | 93.4 |

## Agent readiness — 45.8 (agent-ready)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | documented |
| Auth Clarity | yes |
| Idempotency | no |
| Error Semantics | documented |
| OpenAPI Examples | partial |
| Rate Limit Signal | documented |
| Event Surface Described | yes |
| Agent Skills | derived |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Paid · Self-serve signup — onboarding: self-serve, pricing: paid, trial: no (confidence: high).

## APIs (14)

- **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

## MCP servers (1)

- **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 ...

## Agentic access (1)

- **Similarweb Agentic Access** — 27 operations · 8 acting

## Security (3)

- **Similarweb Authentication** — apiKey/http · 3 schemes
- **Similarweb Domain Security** — TLSv1.3 · HSTS · DMARC
- **Similarweb Trust Center** — SOC 2 Type II, ISO 27001

## Plans (1)

- **Similarweb Plans Pricing**

## Tags

Digital Intelligence, Web Analytics, Traffic Analytics, Competitive Intelligence, Keyword Analytics, Audience Demographics, App Intelligence, Market Research, E-Commerce, SEO

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/similarweb/). Scores are computed from the provider's own public artifacts under a published rubric.