KlaviyoAPIintegration&MCPserver

Deliver real-time Marketing faster, close sales deals sooner, and scale without an integration backlog.

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Add Klaviyo and 6 other pre-built Marketing integrations

Real-time data to fuel countless Marketing use cases

Power AI copilots, insights, predictive analysis, and automation with a modern integration infrastructure that scales alongside you.

martech

Analyze Campaigns

Leverage real-time aggregated campaign data from multiple sources into a single dashboard.

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martech

Nurture Leads

Integrate customer data from multiple systems to automate nurturing workflows.

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martech

Personalize Content

Power AI content recommendations with customer data from various marketing systems.

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Unified API data-models and methods

Martech List

list get remove create update

Martech Member

list get create update

Passthrough

get post put patch delete

187 Unified MCP tools

create a list

create_martech_list7 parameters

list all lists

list_martech_lists6 parameters

retrieve a list

get_martech_list2 parameters

update a list

update_martech_list8 parameters

remove a list

remove_martech_list2 parameters

create a member

create_martech_member5 parameters

list all members

list_martech_members7 parameters

retrieve a member

get_martech_member2 parameters

update a member

update_martech_member6 parameters

get accounts

external_get_accounts2 parameters

get account

external_get_account4 parameters

get campaigns

external_get_campaigns8 parameters

create campaign

external_create_campaign2 parameters

get campaign

external_get_campaign7 parameters

update campaign

external_update_campaign4 parameters

delete campaign

external_delete_campaign3 parameters

get campaign message

external_get_campaign_message7 parameters

update campaign message

external_update_campaign_message4 parameters

get campaign send job

external_get_campaign_send_job4 parameters

update campaign send job

external_update_campaign_send_job4 parameters

get campaign recipient estimation job

external_get_campaign_recipient_estimation_job4 parameters

get campaign recipient estimation

external_get_campaign_recipient_estimation4 parameters

create campaign clone

external_create_campaign_clone2 parameters

assign campaign message template

external_create_campaign_message_assign_template2 parameters

create campaign send job

external_create_campaign_send_job2 parameters

create campaign recipient estimation job

external_create_campaign_recipient_estimation_job2 parameters

get campaign message relationships campaign

external_get_campaign_message_relationships_campaign3 parameters

get campaign message campaign

external_get_campaign_message_campaign4 parameters

get campaign message relationships template

external_get_campaign_message_relationships_template3 parameters

get campaign message template

external_get_campaign_message_template4 parameters

get campaign relationships tags

external_get_campaign_relationships_tags3 parameters

get campaign tags

external_get_campaign_tags4 parameters

get campaign relationships campaign messages

external_get_campaign_relationships_campaign_messages3 parameters

get campaign campaign messages

external_get_campaign_campaign_messages7 parameters

get catalog items

external_get_catalog_items7 parameters

create catalog item

external_create_catalog_item2 parameters

get catalog item

external_get_catalog_item6 parameters

update catalog item

external_update_catalog_item4 parameters

delete catalog item

external_delete_catalog_item3 parameters

get catalog variants

external_get_catalog_variants5 parameters

create catalog variant

external_create_catalog_variant2 parameters

get catalog variant

external_get_catalog_variant4 parameters

update catalog variant

external_update_catalog_variant4 parameters

delete catalog variant

external_delete_catalog_variant3 parameters

get catalog categories

external_get_catalog_categories5 parameters

create catalog category

external_create_catalog_category2 parameters

get catalog category

external_get_catalog_category4 parameters

update catalog category

external_update_catalog_category4 parameters

delete catalog category

external_delete_catalog_category3 parameters

get create items jobs

external_get_create_items_jobs4 parameters

spawn create items job

external_spawn_create_items_job2 parameters

get create items job

external_get_create_items_job6 parameters

get update items jobs

external_get_update_items_jobs4 parameters

spawn update items job

external_spawn_update_items_job2 parameters

get update items job

external_get_update_items_job6 parameters

get delete items jobs

external_get_delete_items_jobs4 parameters

spawn delete items job

external_spawn_delete_items_job2 parameters

get delete items job

external_get_delete_items_job4 parameters

get create variants jobs

external_get_create_variants_jobs4 parameters

spawn create variants job

external_spawn_create_variants_job2 parameters

get create variants job

external_get_create_variants_job6 parameters

get update variants jobs

external_get_update_variants_jobs4 parameters

spawn update variants job

external_spawn_update_variants_job2 parameters

get update variants job

external_get_update_variants_job6 parameters

get delete variants jobs

external_get_delete_variants_jobs4 parameters

spawn delete variants job

external_spawn_delete_variants_job2 parameters

get delete variants job

external_get_delete_variants_job4 parameters

get create categories jobs

external_get_create_categories_jobs4 parameters

spawn create categories job

external_spawn_create_categories_job2 parameters

get create categories job

external_get_create_categories_job6 parameters

get update categories jobs

external_get_update_categories_jobs4 parameters

spawn update categories job

external_spawn_update_categories_job2 parameters

get update categories job

external_get_update_categories_job6 parameters

get delete categories jobs

external_get_delete_categories_jobs4 parameters

spawn delete categories job

external_spawn_delete_categories_job2 parameters

get delete categories job

external_get_delete_categories_job4 parameters

create back in stock subscription

external_create_back_in_stock_subscription2 parameters

get catalog category items

external_get_catalog_category_items9 parameters

get catalog item variants

external_get_catalog_item_variants7 parameters

get catalog item categories

external_get_catalog_item_categories7 parameters

get catalog category relationships items

external_get_catalog_category_relationships_items4 parameters

create catalog category relationships items

external_create_catalog_category_relationships_items4 parameters

update catalog category relationships items

external_update_catalog_category_relationships_items4 parameters

delete catalog category relationships items

external_delete_catalog_category_relationships_items3 parameters

get catalog item relationships categories

external_get_catalog_item_relationships_categories4 parameters

create catalog item relationships categories

external_create_catalog_item_relationships_categories4 parameters

update catalog item relationships categories

external_update_catalog_item_relationships_categories4 parameters

delete catalog item relationships categories

external_delete_catalog_item_relationships_categories3 parameters

request profile deletion

external_request_profile_deletion2 parameters

get events

external_get_events8 parameters

create event

external_create_event2 parameters

get event

external_get_event7 parameters

get event metric

external_get_event_metric4 parameters

get event profile

external_get_event_profile5 parameters

get event relationships metric

external_get_event_relationships_metric3 parameters

get event relationships profile

external_get_event_relationships_profile3 parameters

get flows

external_get_flows9 parameters

get flow

external_get_flow7 parameters

update flow status

external_update_flow4 parameters

get flow action

external_get_flow_action7 parameters

get flow message

external_get_flow_message7 parameters

get flow flow actions

external_get_flow_flow_actions8 parameters

get flow relationships flow actions

external_get_flow_relationships_flow_actions6 parameters

get flow relationships tags

external_get_flow_relationships_tags3 parameters

get flow tags

external_get_flow_tags4 parameters

get flow for flow action

external_get_flow_action_flow4 parameters

get flow action relationships flow

external_get_flow_action_relationships_flow3 parameters

get flow action messages

external_get_flow_action_messages7 parameters

get flow action relationships messages

external_get_flow_action_relationships_messages7 parameters

get flow action for message

external_get_flow_message_action4 parameters

get flow message relationships action

external_get_flow_message_relationships_action3 parameters

get flow message relationships template

external_get_flow_message_relationships_template3 parameters

get flow message template

external_get_flow_message_template4 parameters

get lists

external_get_lists6 parameters

create list

external_create_list2 parameters

get list

external_get_list7 parameters

update list

external_update_list4 parameters

delete list

external_delete_list3 parameters

get list relationships tags

external_get_list_relationships_tags3 parameters

get list tags

external_get_list_tags4 parameters

get list relationships profiles

external_get_list_relationships_profiles4 parameters

add profile to list

external_create_list_relationships4 parameters

remove profile from list

external_delete_list_relationships3 parameters

get list profiles

external_get_list_profiles8 parameters

get metrics

external_get_metrics4 parameters

get metric

external_get_metric4 parameters

query metric aggregates

external_query_metric_aggregates2 parameters

get profiles

external_get_profiles7 parameters

create profile

external_create_profile2 parameters

get profile

external_get_profile8 parameters

update profile

external_update_profile4 parameters

suppress profiles

external_suppress_profiles2 parameters

unsuppress profiles

external_unsuppress_profiles2 parameters

subscribe profiles

external_subscribe_profiles2 parameters

unsubscribe profiles

external_unsubscribe_profiles2 parameters

create or update push token

external_create_push_token2 parameters

get profile lists

external_get_profile_lists4 parameters

get profile relationships lists

external_get_profile_relationships_lists3 parameters

get profile segments

external_get_profile_segments4 parameters

get profile relationships segments

external_get_profile_relationships_segments3 parameters

get segments

external_get_segments6 parameters

get segment

external_get_segment7 parameters

update segment

external_update_segment4 parameters

get segment relationships tags

external_get_segment_relationships_tags3 parameters

get segment tags

external_get_segment_tags4 parameters

get segment relationships profiles

external_get_segment_relationships_profiles4 parameters

get segment profiles

external_get_segment_profiles8 parameters

get tags

external_get_tags7 parameters

create tag

external_create_tag2 parameters

get tag

external_get_tag6 parameters

update tag

external_update_tag4 parameters

delete tag

external_delete_tag3 parameters

get tag groups

external_get_tag_groups5 parameters

create tag group

external_create_tag_group2 parameters

get tag group

external_get_tag_group4 parameters

update tag group

external_update_tag_group4 parameters

delete tag group

external_delete_tag_group3 parameters

get tag relationships flows

external_get_tag_relationships_flows3 parameters

create tag relationships flows

external_create_tag_relationships_flows4 parameters

delete tag relationships flows

external_delete_tag_relationships_flows3 parameters

get tag relationships campaigns

external_get_tag_relationships_campaigns3 parameters

create tag relationships campaigns

external_create_tag_relationships_campaigns4 parameters

delete tag relationships campaigns

external_delete_tag_relationships_campaigns3 parameters

get tag relationships lists

external_get_tag_relationships_lists3 parameters

create tag relationships lists

external_create_tag_relationships_lists4 parameters

delete tag relationships lists

external_delete_tag_relationships_lists3 parameters

get tag relationships segments

external_get_tag_relationships_segments3 parameters

create tag relationships segments

external_create_tag_relationships_segments4 parameters

delete tag relationships segments

external_delete_tag_relationships_segments3 parameters

get tag relationships tag group

external_get_tag_relationships_tag_group3 parameters

get tag group relationships tags

external_get_tag_group_relationships_tags3 parameters

get tag tag group

external_get_tag_tag_group4 parameters

get tag group tags

external_get_tag_group_tags4 parameters

get templates

external_get_templates5 parameters

create template

external_create_template2 parameters

get template

external_get_template4 parameters

update template

external_update_template4 parameters

delete template

external_delete_template3 parameters

create template render

external_create_template_render2 parameters

create template clone

external_create_template_clone2 parameters

create client subscription

external_create_client_subscription3 parameters

create or update client push token

external_create_client_push_token3 parameters

unregister client push token

external_unregister_client_push_token3 parameters

create client event

external_create_client_event3 parameters

create or update client profile

external_create_client_profile3 parameters

bulk create client events

external_bulk_create_client_events3 parameters

create client back in stock subscription

external_create_client_back_in_stock_subscription3 parameters

The modern Unified API platform, built differently

Real-time, pass-through

Every request hits the source API live. No caching, no sync jobs, no stale data — just on-demand API reads/writes with native and virtual webhooks for instant updates.

Zero-storage by design

We never store end-customer data. Traffic is stateless and regionalized (US/EU/AU), reducing compliance scope and eliminating data-at-rest risk.

One API, deeply normalized

360+ integrations, 21 categories... Unified objects, endpoints, scopes, and errors—plus raw payload passthrough when you need provider-specific fields.

Custom fields & objects

Go beyond shallow schemas. We support custom fields and read/write on custom objects (e.g., Salesforce) via unified metadata APIs.

AI-ready integrations

Built for AI products: real-time streams for RAG/embeddings and Unified MCP tools that securely grant LLMs controlled integration access.

Predictable pricing, no lock-in

Transparent usage-based pricing that scales with API volume—not customers. Own your credentials and migrate anytime.

Add a Klaviyo integration to your application in hours

1Test drive integrations

Effortlessly test API calls, explore endpoints, and try out the Klaviyo integration using synthetic data in our Sandbox environment.

2Authorize connections

Drop in our Authorization component with a single line of code. Your users can then connect and grant access to their Klaviyo data.

3Start making API calls

Use the Connection ID to interact with Klaviyo via our unified API. We handle maintenance and updates so you can focus on your product.

Seamless Auth, no extra work

Unified.to removes the complexity of authentication and authorization so you can focus on building your product, not managing auth flows. Our pre-built UI and flexible API handle everything in the background—no extra setup required.

See documentation

React

React component React component source code

Trusted by global product companies and developers to power integrations for innovative AI and SaaS applications

5 stars on G2

Integrate with all the major marketing applications

Unified.to makes it possible to integrate once to a unified API to connect with all the applications your customers use, so you can train AI models, build advanced automation, and expand your market.

Start testing for free