Block: SimilarWeb Block

Retrieve total website visits and engagement over time and the global rank of a website through the SimilarWeb API. Authenticate with a SimilarWeb API key to pull traffic analytics and competitive intelligence data into any workflow.

Overview

Property	Value
Type	`similarweb`
Category	`tools`
Color	`#0061FF`

When to Use

Pulling monthly visit trends for a competitor domain to feed into a market research workflow.
Benchmarking a website's global rank against others in a category.
Enriching a CRM record with traffic data by chaining this block after a lead-lookup block.
Scheduling a recurring workflow that logs website traffic metrics to a table.
Feeding SimilarWeb data into an Agent block for automated competitive analysis summaries.
Triggering alerts when a domain's traffic or rank changes beyond a threshold.

Configuration

Operation

Selects which SimilarWeb data point to fetch. This dropdown controls which fields are shown and which tool is called.

Label	ID
Total traffic	`similarweb_total_traffic`
Website rank	`similarweb_website_rank`

Default: similarweb_total_traffic.

Both operations require the Domain field.

Domain

Type: Short text input
Placeholder: example.com
Required: Yes (for both operations)
Condition: Shown for both similarweb_total_traffic and similarweb_website_rank

The domain to analyze, without https:// (e.g., google.com). Can be supplied as a literal or as a reference to another block's output using {{blockName.field}}.

API Key

Type: Short text input (password-masked)
Placeholder: Your SimilarWeb API key
Required: Yes (for all operations)

Your SimilarWeb API key. Store it as an environment variable and reference it as {{SIMILARWEB_API_KEY}} so the key is not hard-coded in the workflow.

Inputs & Outputs

Inputs:

operation (string) — Operation to perform; must be one of similarweb_total_traffic or similarweb_website_rank
apiKey (string) — SimilarWeb API key
domain (string) — Website domain to analyze

Outputs:

data (json) — Result object from SimilarWeb; for similarweb_total_traffic this contains the monthly visits and engagement payload; for similarweb_website_rank this contains the global rank payload
metadata (json) — Response metadata; includes domain (string) — the analyzed domain

Tools

SimilarWeb Total Traffic (similarweb_total_traffic) — Calls the SimilarWeb v1 endpoint GET /website/{domain}/total-traffic-and-engagement/visits with monthly granularity and returns total visits and engagement data. Requires apiKey and domain.

SimilarWeb Website Rank (similarweb_website_rank) — Calls the SimilarWeb v1 endpoint GET /website/{domain}/global-rank/global-rank and returns the current global rank of the domain. Requires apiKey and domain.

YAML Example

similarweb_1:
  type: similarweb
  name: "SimilarWeb"
  inputs:
    operation: "similarweb_total_traffic"
    domain: "{{leadEnrich.domain}}"
    apiKey: "{{SIMILARWEB_API_KEY}}"
  connections:
    outgoing:
      - target: next-block-id

SimilarWeb Block