Klaviyo

Klaviyo Forms API

forms

GitHub OpenAPI
Business capability
Demand Generation Management BC-400.40

Operations 9

Each operation below carries the questions people ask an LLM about it and the instructions they give an agent to run it. Generated by API Evangelist overlay

GET /api/forms List signup forms · Get Forms #
Ask an LLM
“What signup forms and popups do I have in Klaviyo?”
“Can I filter my forms by status or name?”
Tell an agent
List forms matching {filter}.
Show all forms sorted by {sort}.
POST /api/forms Create a signup form · Create Form #
Ask an LLM
“How do I create a new signup form through the API?”
“Can I build a popup form programmatically?”
Tell an agent
Create a form {form}.
Build a new signup form from {form}.
GET /api/forms/{id} Get one signup form · Get Form #
Ask an LLM
“What are the details of a specific form?”
“Can I look up a form by its ID?”
Tell an agent
Get form {form_id}.
Show the settings of signup form {form_id}.
DELETE /api/forms/{id} Delete a signup form · Delete Form #
Ask an LLM
“Can I delete a form I no longer use?”
“What's the way to permanently remove a popup form?”
Tell an agent destructive · confirm first
Delete form {form_id}.
Permanently remove signup form {form_id}.
GET /api/form-versions/{id} Get one form version · Get Form Version #
Ask an LLM
“What does a specific version of a form look like?”
“Can I fetch a single form version by ID?”
Tell an agent
Get form version {version_id}.
Show the details of form version {version_id}.
GET /api/forms/{id}/form-versions List the versions of a form · Get Versions for Form #
Ask an LLM
“What versions exist for a particular form, like A/B variations?”
“Can I see full details of every version of one form?”
Tell an agent
List the versions of form {form_id}.
Show every version of form {form_id} matching {filter}.
GET /api/forms/{id}/relationships/form-versions List version IDs for a form · Get Version IDs for Form #
Ask an LLM
“Can I get only the version IDs for a form?”
“Which version IDs belong to one form?”
Tell an agent
Get only the version IDs of form {form_id}.
Return the version ID list for form {form_id}.
GET /api/form-versions/{id}/form Get the form a version belongs to · Get Form for Form Version #
Ask an LLM
“Which form does a given form version belong to?”
“Can I get the full parent form from a version ID?”
Tell an agent
Get the form for version {version_id}.
Fetch the signup form that owns version {version_id}.
GET /api/form-versions/{id}/relationships/form Get the form ID for a form version · Get Form ID for Form Version #
Ask an LLM
“Can I get only the parent form ID for a version?”
“What's the form ID behind a particular form version?”
Tell an agent
Get only the form ID for version {version_id}.
Return the parent form ID of version {version_id}.

Documentation

📖
Documentation
https://developers.klaviyo.com/
📖
Authentication
https://developers.klaviyo.com/en/docs/authenticate_
📖
RateLimits
https://developers.klaviyo.com/en/docs/rate_limits_and_error_handling

Specifications

⚙
OpenAPI
https://artifacts.apis.io/klaviyo/openapi/klaviyo-forms-api-openapi.yml
⚙
AsyncAPI
https://artifacts.apis.io/klaviyo/asyncapi/klaviyo-webhooks-asyncapi.yaml

Other Resources

🔗
Reference
https://developers.klaviyo.com/en/reference/api_overview
🔗
Versioning
https://developers.klaviyo.com/en/docs/api_versioning_and_deprecation_policy
🔗
ChangeLog
https://developers.klaviyo.com/en/docs/changelog_
🔗
SDKs
https://developers.klaviyo.com/en/docs/sdk_overview
🔗
GitHub
https://github.com/klaviyo/openapi
🔗
Overlay
https://artifacts.apis.io/klaviyo/overlays/klaviyo-forms-api-overlay.yaml

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OpenAPI Specification

klaviyo-forms-api-openapi.yml Raw ↑ 
openapi: 3.2.0
info:
  title: Klaviyo Forms API
  version: '2026-04-15'
  description: The Klaviyo REST API. Please visit https://developers.klaviyo.com for more details.
  contact:
    name: Klaviyo Developer Experience Team
    email: developers@klaviyo.com
    url: https://developers.klaviyo.com
  termsOfService: https://www.klaviyo.com/legal/api-terms
  license:
    name: License
    url: https://www.klaviyo.com/legal
servers:
- url: https://a.klaviyo.com
  description: Production
security:
- Klaviyo-API-Key: []
tags:


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# Full source: https://artifacts.apis.io/klaviyo/openapi/klaviyo-forms-api-openapi.yml