Kit
Kit (formerly ConvertKit) is a creator email marketing platform with a REST API for managing subscribers, tags, sequences, forms, broadcasts, and automation rules. The API supports both API key and OAuth 2.0 authentication, with v4 as the current version featuring cursor-based pagination, bulk operations, and async processing.
Kit publishes 14 APIs on the APIs.io network, including Accounts API, Broadcasts API, Custom Fields API, and 11 more. Tagged areas include Email Marketing, Creator Economy, Subscribers, Automation, and Newsletters.
The Kit catalog on APIs.io includes 1 Spectral governance ruleset.
Kit’s developer surface includes authentication, documentation, engineering blog, pricing, and 13 more developer resources.
Kin Score
APIs 14
Individual APIs this provider publishes, each with its own machine-readable definition.
Kit Accounts API
The Accounts API from Kit — 5 operation(s) for accounts.
Kit Broadcasts API
The Broadcasts API from Kit — 5 operation(s) for broadcasts.
Kit Custom Fields API
The Custom Fields API from Kit — 4 operation(s) for custom fields.
Kit Email Templates API
The Email Templates API from Kit — 1 operation(s) for email templates.
Kit Forms API
The Forms API from Kit — 4 operation(s) for forms.
Kit Posts API
The Posts API from Kit — 2 operation(s) for posts.
Kit Purchases API
The Purchases API from Kit — 2 operation(s) for purchases.
Kit Segments API
The Segments API from Kit — 1 operation(s) for segments.
Kit Sequence Emails API
The Sequence Emails API from Kit — 2 operation(s) for sequence emails.
Kit Sequences API
The Sequences API from Kit — 4 operation(s) for sequences.
Kit Snippets API
The Snippets API from Kit — 2 operation(s) for snippets.
Kit Subscribers API
The Subscribers API from Kit — 7 operation(s) for subscribers.
Kit Tags API
The Tags API from Kit — 6 operation(s) for tags.
Kit Webhooks API
The Webhooks API from Kit — 2 operation(s) for webhooks.
Scroll for all 14
GraphQL 1
GraphQL schemas published by this provider.
Kit (ConvertKit) GraphQL API
Kit (formerly ConvertKit) is a creator email marketing platform. This conceptual GraphQL schema wraps the Kit REST API v4, providing queries for subscribers, tags, sequences, fo...
GRAPHQLPricing Plans 1
Published pricing tiers and plan structures.
Rate Limits 1
Documented rate limits and quota policies.
Convertkit Rate Limits
RATE LIMITSFinOps 1
Cost, billing, and metering signals for API financial operations.
Convertkit Finops
FINOPSSpectral Rules 1
Spectral governance rulesets for linting and validating these APIs.
Kit API Rules
SPECTRALJSON Schema 100
Standalone JSON Schema definitions for this provider's data models.
BroadcastAnyCondition
JSON SCHEMAFilterCondition
JSON SCHEMAFormsAnyCondition
JSON SCHEMAIdsAnyCondition
JSON SCHEMASubscriberFilterRequest
JSON SCHEMAUrlAnyCondition
JSON SCHEMAAdd subscriber to form Request
JSON SCHEMAAdd subscriber to form Response
JSON SCHEMAAdd subscriber to sequence Request
JSON SCHEMAAdd subscriber to sequence Response
JSON SCHEMABulk add subscribers to forms Request
JSON SCHEMABulk add subscribers to forms Response
JSON SCHEMABulk create custom fields Request
JSON SCHEMABulk create custom fields Response
JSON SCHEMABulk create subscribers Request
JSON SCHEMABulk create subscribers Response
JSON SCHEMABulk create tags Request
JSON SCHEMABulk create tags Response
JSON SCHEMABulk remove tags from subscribers Response
JSON SCHEMABulk tag subscribers Request
JSON SCHEMABulk tag subscribers Response
JSON SCHEMACreate a broadcast Request
JSON SCHEMACreate a broadcast Response
JSON SCHEMACreate a custom field Request
JSON SCHEMACreate a custom field Response
JSON SCHEMACreate a purchase Request
JSON SCHEMACreate a purchase Response
JSON SCHEMACreate a sequence email Request
JSON SCHEMACreate a sequence email Response
JSON SCHEMACreate a sequence Request
JSON SCHEMACreate a sequence Response
JSON SCHEMACreate a snippet Request
JSON SCHEMACreate a snippet Response
JSON SCHEMACreate a subscriber Request
JSON SCHEMACreate a subscriber Response
JSON SCHEMACreate a tag Request
JSON SCHEMACreate a tag Response
JSON SCHEMACreate a webhook Request
JSON SCHEMACreate a webhook Response
JSON SCHEMAGet a broadcast Response
JSON SCHEMAGet a post Response
JSON SCHEMAGet a purchase Response
JSON SCHEMAGet a sequence email Response
JSON SCHEMAGet a sequence Response
JSON SCHEMAGet a snippet Response
JSON SCHEMAGet a subscriber Response
JSON SCHEMAGet Creator Profile Response
JSON SCHEMAGet current account Response
JSON SCHEMAGet email stats Response
JSON SCHEMAGet growth stats Response
JSON SCHEMAGet link clicks for a broadcast Response
JSON SCHEMAGet stats for a broadcast Response
JSON SCHEMAGet stats for a list of broadcasts Response
JSON SCHEMAList broadcasts Response
JSON SCHEMAList colors Response
JSON SCHEMAList custom fields Response
JSON SCHEMAList email templates Response
JSON SCHEMAList forms Response
JSON SCHEMAList posts Response
JSON SCHEMAList purchases Response
JSON SCHEMAList segments Response
JSON SCHEMAList sequence emails Response
JSON SCHEMAList sequences Response
JSON SCHEMAList snippets Response
JSON SCHEMAList stats for a subscriber Response
JSON SCHEMAList subscribers for a form Response
JSON SCHEMAList subscribers for a sequence Response
JSON SCHEMAList subscribers for a tag Response
JSON SCHEMAList subscribers Response
JSON SCHEMAList tags for a subscriber Response
JSON SCHEMAList tags Response
JSON SCHEMAList webhooks Response
JSON SCHEMATag a subscriber by email address Request
JSON SCHEMATag a subscriber by email address Response
JSON SCHEMATag a subscriber Request
JSON SCHEMATag a subscriber Response
JSON SCHEMAUnsubscribe subscriber Request
JSON SCHEMAUpdate a broadcast Request
JSON SCHEMAUpdate a broadcast Response
JSON SCHEMAUpdate a custom field Request
JSON SCHEMAUpdate a custom field Response
JSON SCHEMAUpdate a sequence email Request
JSON SCHEMAUpdate a sequence email Response
JSON SCHEMAUpdate a sequence Request
JSON SCHEMAUpdate a sequence Response
JSON SCHEMAUpdate a snippet Request
JSON SCHEMAUpdate a snippet Response
JSON SCHEMAUpdate a subscriber Request
JSON SCHEMAUpdate a subscriber Response
JSON SCHEMAUpdate colors Request
JSON SCHEMAUpdate colors Response
JSON SCHEMAUpdate tag name Request
JSON SCHEMAUpdate tag name Response
JSON SCHEMAScroll for all 100
Examples 72
Example request and response payloads for these APIs.
Add Subscriber To Form
EXAMPLEAdd Subscriber To Sequence
EXAMPLEBulk Create Custom Fields
EXAMPLEBulk Create Subscribers
EXAMPLEBulk Create Tags
EXAMPLEBulk Tag Subscribers
EXAMPLECreate A Broadcast
EXAMPLECreate A Custom Field
EXAMPLECreate A Purchase
EXAMPLECreate A Sequence Email
EXAMPLECreate A Sequence
EXAMPLECreate A Snippet
EXAMPLECreate A Subscriber
EXAMPLECreate A Tag
EXAMPLECreate A Webhook
EXAMPLEDelete A Broadcast
EXAMPLEDelete A Sequence Email
EXAMPLEDelete A Sequence
EXAMPLEDelete A Webhook
EXAMPLEDelete Custom Field
EXAMPLEGet A Broadcast
EXAMPLEGet A Post
EXAMPLEGet A Purchase
EXAMPLEGet A Sequence Email
EXAMPLEGet A Sequence
EXAMPLEGet A Snippet
EXAMPLEGet A Subscriber
EXAMPLEGet Creator Profile
EXAMPLEGet Current Account
EXAMPLEGet Email Stats
EXAMPLEGet Growth Stats
EXAMPLEGet Stats For A Broadcast
EXAMPLEList Broadcasts
EXAMPLEList Colors
EXAMPLEList Custom Fields
EXAMPLEList Email Templates
EXAMPLEList Forms
EXAMPLEList Posts
EXAMPLEList Purchases
EXAMPLEList Segments
EXAMPLEList Sequence Emails
EXAMPLEList Sequences
EXAMPLEList Snippets
EXAMPLEList Stats For A Subscriber
EXAMPLEList Subscribers For A Form
EXAMPLEList Subscribers For A Tag
EXAMPLEList Subscribers
EXAMPLEList Tags For A Subscriber
EXAMPLEList Tags
EXAMPLEList Webhooks
EXAMPLERemove Tag From Subscriber
EXAMPLETag A Subscriber
EXAMPLEUnsubscribe Subscriber
EXAMPLEUpdate A Broadcast
EXAMPLEUpdate A Custom Field
EXAMPLEUpdate A Sequence Email
EXAMPLEUpdate A Sequence
EXAMPLEUpdate A Snippet
EXAMPLEUpdate A Subscriber
EXAMPLEUpdate Colors
EXAMPLEUpdate Tag Name
EXAMPLEScroll for all 72
Security Posture 4
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Scopes 1
OAuth scopes governing access to this provider's APIs.
Agentic Access 1
Recommended x-agentic-access execution contracts for AI agents.
Resources
Documentation 1
Reference material describing how the API behaves
Agent Surfaces 1
MCP servers, agent skills, and machine-readable catalogs
Build 1
SDKs, sample code, and the tooling you integrate with
Access & Security 5
Authentication, authorization, and security posture
Operate 2
Status, limits, changes, and where to get help
Commercial 3
Pricing, plans, and the legal terms of use
Company 3
The organization behind the API
Other 1
Properties that don't map to a standard resource type