SimilarWeb API

View Similarweb traffic estimates, aggregated audiences, and technology stacks by domain name.

Provide a target website domain to retrieve third-party traffic overviews and audience insights.

Platform availability

24h health
Normal
Normal

Last 30 days

Available capabilities

Each SimilarWeb action, what it does, its price and its health over the last 24 hours. Open an action for its parameters, response fields and code samples.

CapabilityWhat it doesPer 1,00024-hour health
SearchsearchGet a traffic overview for one domain from SimilarWeb, with global, country and category rank, estimated monthly visits, bounce rate, traffic sources and top countries.$1.39 per 1,000 requestsNormal
CompetitorscompetitorsList the sites SimilarWeb relates to a domain, each marked as competitor, similar or related, with category, global and country rank and audience affinity.$1.39 per 1,000 requestsNormal
AudienceaudienceSee an estimated visitor profile for a domain on SimilarWeb: gender split, age bands, other sites and topics visitors favor, the site's technologies and organic versus paid search share.$1.39 per 1,000 requestsNormal

Open a capability for its parameters, response fields, code samples and trial.

What does each SimilarWeb action accept?

Each answer below pairs one callable action with its real inputs. Parameter meanings and allowed values are action-specific; a familiar name does not carry the same meaning across every platform.

Official sources are linked only to clarify the platform term beside them. They do not imply platform authorization or endorsement, and they do not add official-site features to the EveryInfra API contract.

ActionRequiredOptionalDeliveryLimitPer 1,000Response fields
search

Search

Get a traffic overview for one domain from SimilarWeb, with global, country and category rank, estimated monthly visits, bounce rate, traffic sources and top countries. Pass a domain such as example.com, not a search term; figures are modeled estimates with a snapshot date, not the site's own analytics.

keyword—Sync delivery—$1.39 per 1,000 requestsid · url · name · text · category · global_rank · country_rank · category_rank · country · monthly_visits · bounce_rate · pages_per_visit · avg_visit_duration · company_name · company_founded · company_employees_min · company_employees_max · company_hq_country · company_hq_city · top_countries · top_keywords · traffic_sources · top_referrals · social_distribution · competitors · snapshot_date · email · emails · phone · platform
competitors

Competitors

List the sites SimilarWeb relates to a domain, each marked as competitor, similar or related, with category, global and country rank and audience affinity. Pass a domain such as example.com; a listed relation does not prove direct commercial competition or cover the whole market.

keyword—Sync delivery—$1.39 per 1,000 requestsid · url · name · relation · category · category_rank · global_rank · country_rank · affinity · platform · source_domain
audience

Audience

See an estimated visitor profile for a domain on SimilarWeb: gender split, age bands, other sites and topics visitors favor, the site's technologies and organic versus paid search share. These are aggregate estimates with a snapshot date, not identifiable people or the site's own data.

keyword—Sync delivery—$1.39 per 1,000 requestsid · url · name · male_share · female_share · age_distribution · top_interested_websites · top_interested_topics · top_interested_categories · technologies · organic_traffic_share · paid_traffic_share · snapshot_date · platform

What do the SimilarWeb search parameters mean?

Get a traffic overview for one domain from SimilarWeb, with global, country and category rank, estimated monthly visits, bounce rate, traffic sources and top countries. Pass a domain such as example.com, not a search term; figures are modeled estimates with a snapshot date, not the site's own analytics.

Full API reference: parameters, code samples, response example and health →
keywordRequired
Specifies the target domain to analyze (such as example.com) rather than a general search keyword query. Depending on the action selected, this parameter retrieves traffic overviews for search, lists similar sites for competitors, or extracts domain visitor profiles for audience. Returned metrics are third-party estimations and do not reflect internal GA4 analytics measurements.
Similarweb: Visits, unique visitors, and engagement metrics — Similarweb distinguishes Monthly Visits from Monthly Unique Visitors and tracks duration, pages per visit, and bounce rate separately. Date, device, and subdomain filters are not accepted as parameters in this action, and monthly_visits cannot be used as a proxy for unique visitor counts. · Checked

What do the SimilarWeb competitors parameters mean?

List the sites SimilarWeb relates to a domain, each marked as competitor, similar or related, with category, global and country rank and audience affinity. Pass a domain such as example.com; a listed relation does not prove direct commercial competition or cover the whole market.

Full API reference: parameters, code samples, response example and health →
keywordRequired
Specifies the target domain to analyze (such as example.com) rather than a general search keyword query. Depending on the action selected, this parameter retrieves traffic overviews for search, lists similar sites for competitors, or extracts domain visitor profiles for audience. Returned metrics are third-party estimations and do not reflect internal GA4 analytics measurements.

What do the SimilarWeb audience parameters mean?

See an estimated visitor profile for a domain on SimilarWeb: gender split, age bands, other sites and topics visitors favor, the site's technologies and organic versus paid search share. These are aggregate estimates with a snapshot date, not identifiable people or the site's own data.

Full API reference: parameters, code samples, response example and health →
keywordRequired
Specifies the target domain to analyze (such as example.com) rather than a general search keyword query. Depending on the action selected, this parameter retrieves traffic overviews for search, lists similar sites for competitors, or extracts domain visitor profiles for audience. Returned metrics are third-party estimations and do not reflect internal GA4 analytics measurements.

How to use the SimilarWeb API

  1. 01Read the public catalog and choose a platform action.
  2. 02Send the platform, action, and required parameters to POST /api/v1/social.
  3. 03Handle a synchronous result, or poll the returned job ID when the action runs asynchronously.
  4. 04Store the structured response fields needed by your application.
similarweb_search.sh
curl -X POST https://api.everyinfra.com/api/v1/social \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"platform":"similarweb","action":"search","params":{"keyword":"<keyword>"}}'

SimilarWeb API questions

What can I retrieve with the SimilarWeb API?

Set platform to similarweb. The current catalog lists search, competitors, and audience. These action names identify different SimilarWeb objects or views; they are not interchangeable search modes.

Which input starts a SimilarWeb `search` request?

Specifies the target domain to analyze (such as example.com) rather than a general search keyword query. Depending on the action selected, this parameter retrieves traffic overviews for search, lists similar sites for competitors, or extracts domain visitor profiles for audience. Returned metrics are third-party estimations and do not reflect internal GA4 analytics measurements. Send it as keyword inside params.

Which fields can SimilarWeb `search` return?

Its declared schema includes name, text, category, and global_rank. A declared field can still be absent from an individual record, and every other action has its own field list.

Does every SimilarWeb action return immediately?

Actions labeled asynchronous return a job ID you poll. Every other action can also run asynchronously: add "mode": "async" to the request body to receive a job ID immediately, useful for slow tasks or large limits. The current catalog contains sync delivery.