On24

ON24 (NYSE: ONTF) is a digital engagement and webinar platform that companies use to run webinars, virtual events, and always-on content experiences and to turn the resulting first-party engagement data into marketing and sales intelligence. ON24 publishes a complete, anonymously accessible OpenAPI 3.0.1 for its Webinar & Content Center (WCC) REST API v2 at https://api.on24.com/v2/openapi.json — 58 paths and 67 operations across six tags: Client Level Analytics, Event Level Analytics, Event Management, REST Registration, Content Listings and Helpers. Customers use it to automate registrant creation, pull attendee and engagement analytics into their CRM, marketing automation platform or data warehouse, provision and configure webinars, and honour GDPR erasure requests. The API runs from two regional hosts, https://api.on24.com/v2 (North America) and https://api.eu.on24.com/v2 (European Union), and is authenticated with a paired accessTokenKey / accessTokenSecret set of HTTP headers plus a numeric client id in every path. There is no OAuth surface, no first-party SDK and no MCP server, and rate-limit exhaustion is signalled as HTTP 403 rather than 429.

On24 publishes 6 API contracts indexed on the APIs.io network, including Client Level Analytics API, Content Listings API, Event Level Analytics API, and 3 more. Tagged areas include Company, Webinars, Virtual Events, Digital Engagement, and Marketing.

The On24 catalog on APIs.io includes 1 Spectral governance ruleset.

On24’s developer surface includes documentation, API reference, engineering blog, authentication, code examples, changelog, getting-started guide, and 28 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

43.7/100 developing ▬ flat Agent 24/100 agent aware saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

7 published contracts 4 Agent Skills

Company Webinars Virtual EventsDigital EngagementMarketing Analytics Event Management MarTech

What this lets a business do 1

Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →

Marketing Management

BC-400

Client Level AnalyticsEvent Level AnalyticsEvent Management

GET /client/{clientId} GET /client/{clientId}/engagedaccount GET /client/{clientId}/lead GET /client/{clientId}/registrant

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 43.7/100 · developing

Contract Quality 9.4 / 19

Developer Ergonomics 4.9 / 15

Access Clarity 5.5 / 15

Operational Transparency 3.1 / 10

Contract Governance 2.9 / 9

Discoverability 5.9 / 8

Regulatory Posture 4.4 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 24/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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Agent readiness — checks not met, largest first (exact, from this profile):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document
Delegated User Identity +6 pts — a served discovery document listing authorization_code in grant_types_supported (served), else an oauth2 authorizationCode flow or openIdConnect declared in an OpenAPI (documented)

7 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Developer Ergonomics scores 32.7 — up to +13.5 composite points
Access Clarity scores 36.8 — up to +12.6 composite points
Contract Quality scores 50.2 — up to +12.5 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from the provider profile at artifacts.apis.io/on24/apis.yml: open an issue on github.com/api-evangelist/on24 to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Events and Ticketing Platforms	standard	34.4	-	-

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

Standards implemented 1

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

OpenAPI

measured — observed by APIs.io (published)

APIs 6

Individual APIs this provider publishes, each with its own machine-readable definition.

On24 Client Level Analytics API

The Client Level Analytics API from On24 — 14 operation(s) for client level analytics.

On24 Content Listings API

The Content Listings API from On24 — 3 operation(s) for content listings.

On24 Event Level Analytics API

The Event Level Analytics API from On24 — 16 operation(s) for event level analytics.

On24 Event Management API

The Event Management API from On24 — 12 operation(s) for event management.

On24 Helpers API

The Helpers API from On24 — 13 operation(s) for helpers.

On24 REST Registration API

The REST Registration API from On24 — 5 operation(s) for rest registration.

Open Collections 6

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

ON24 WCC API v2 — Client Level Analytics

OPEN COLLECTION

ON24 WCC API v2 — Content Listings

OPEN COLLECTION

ON24 WCC API v2 — Event Level Analytics

OPEN COLLECTION

ON24 WCC API v2 — Event Management

OPEN COLLECTION

ON24 WCC API v2 — Helpers

OPEN COLLECTION

ON24 WCC API v2 — REST Registration

OPEN COLLECTION

Agent Skills 4

Packaged agent skills for driving this provider's APIs from an AI assistant.

on24-create-and-configure-webinar

AGENT SKILL

on24-honor-erasure-request

AGENT SKILL

on24-pull-engagement-analytics

AGENT SKILL

on24-register-attendee

AGENT SKILL

On24 API pricing

Pricing Plans 1

Published pricing tiers and plan structures.

On24 Plans Pricing

0 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

On24 Rate Limits

0 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

On24 Finops

FINOPS

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

On24 API Rules

58 rules · 48 errors 6 warnings 4 info

SPECTRAL

OpenAPI Overlays 6

Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.

On24 Client Level Analytics Overlay

4 actions · update · on24-client-level-analytics-openapi.yml

DERIVED

On24 Content Listings Overlay

4 actions · update · on24-content-listings-openapi.yml

DERIVED

On24 Event Level Analytics Overlay

4 actions · update · on24-event-level-analytics-openapi.yml

DERIVED

On24 Event Management Overlay

4 actions · update · on24-event-management-openapi.yml

DERIVED

On24 Helpers Overlay

4 actions · update · on24-helpers-openapi.yml

DERIVED

On24 Rest Registration Overlay

4 actions · update · on24-rest-registration-openapi.yml

DERIVED

Examples 6

Example request and response payloads for these APIs.

On24 Analyticsclientlevel Events 200

7 fields

EXAMPLE

On24 Analyticsclientlevel Pep 200

7 fields

EXAMPLE

On24 Analyticseventlevel Attendees 200

7 fields

EXAMPLE

On24 Analyticseventlevel Metadataandusage 200

7 fields

EXAMPLE

On24 Analyticseventlevel Surveys 200

7 fields

EXAMPLE

On24 Eventmanagement Createawebinar 200

7 fields

EXAMPLE

Security Posture 3

Authentication, domain security, vulnerability disclosure, and trust-center signals.

On24 Authentication

apiKey · 2 schemes

SECURITY

On24 Domain Security

TLSv1.3 · HSTS

SECURITY

On24 Trust Center

SOC 2, ISO 27001

SECURITY

Resources

Get Started 2

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

X-MCPServerCandidate

X-MCPServerCandidate

LLMsTxt

LLMsTxt

AgentSkill

AgentSkill

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Conventions

Conformance

Lifecycle

ErrorCatalog

DataModel

Build 3

SDKs, sample code, and the tooling you integrate with

Packages

Packages

Examples

Examples

ToolCrosswalk

ToolCrosswalk

Access & Security 4

Authentication, authorization, and security posture

TrustCenter

Compliance

Authentication

DomainSecurity

Operate 4

Status, limits, changes, and where to get help

RateLimits

ChangeLog

StatusPage

Support

Commercial 3

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Plans

Plans

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 7

Properties that don't map to a standard resource type

CapabilityMap

Overlay

Overlay

Overlay

Overlay

Overlay

Overlay

Scroll for all 7

Source (apis.yml)

x-enrichment:
  date: '2026-08-13'
  status: enriched
  artifacts_added: 31
  pass: local-v1
aid: on24
name: On24
description: 'ON24 (NYSE: ONTF) is a digital engagement and webinar platform that companies use to run webinars, virtual events,
  and always-on content experiences and to turn the resulting first-party engagement data into marketing and sales intelligence.
  ON24 publishes a complete, anonymously accessible OpenAPI 3.0.1 for its Webinar & Content Center (WCC) REST API v2 at https://api.on24.com/v2/openapi.json
  — 58 paths and 67 operations across six tags: Client Level Analytics, Event Level Analytics, Event Management, REST Registration,
  Content Listings and Helpers. Customers use it to automate registrant creation, pull attendee and engagement analytics into
  their CRM, marketing automation platform or data warehouse, provision and configure webinars, and honour GDPR erasure requests.
  The API runs from two regional hosts, https://api.on24.com/v2 (North America) and https://api.eu.on24.com/v2 (European Union),
  and is authenticated with a paired accessTokenKey / accessTokenSecret set of HTTP headers plus a numeric client id in every
  path. There is no OAuth surface, no first-party SDK and no MCP server, and rate-limit exhaustion is signalled as HTTP 403
  rather than 429.'
url: https://raw.githubusercontent.com/api-evangelist/on24/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- canaan-partners
x-tier: stub
x-tier-reason: portfolio-lead
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: contract
  onboarding: sales
  trial: false
  try_now: false
  public: false
  label: Contract-gated API access
  confidence: high
  source:
  - authentication
  - plans
  note: 'Corrected 2026-08-13. The API contract itself is public (OpenAPI served anonymously at https://api.on24.com/v2/openapi.json),
    but CREDENTIALS are not self-serve: ON24 documents that the customer contract must include the "Connect" product before
    an API token can be provisioned, and a subset of operations additionally requires the Elite tier. No pricing is published.'
  generated: '2026-08-13'
  method: searched
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-08-13'
image: https://www.on24.com/wp-content/themes/on24/assets/images/on24-logo.svg
tags:
- Company
- Webinars
- Virtual Events
- Digital Engagement
- Marketing
- Analytics
- Event Management
- MarTech
tags_raw:
- Company
- Webinars
- Virtual Events
- Digital Engagement
- Marketing
- Analytics
- Event Management
- Martech
apis:
- aid: on24:on24-client-level-analytics-api
  name: On24 Client Level Analytics API
  description: The Client Level Analytics API from On24 — 14 operation(s) for client level analytics.
  humanURL: https://apidoc.on24.com/
  baseURL: https://api.on24.com/v2/
  tags:
  - Client Level Analytics
  properties:
  - type: OpenAPI
    url: openapi/on24-client-level-analytics-api-openapi.yml
  - type: Documentation
    url: https://apidoc.on24.com/
  - type: APIReference
    url: https://apidoc.on24.com/
  - type: Examples
    url: examples/_index.yml
  - type: Authentication
    url: authentication/on24-authentication.yml
  - type: Conventions
    url: conventions/on24-conventions.yml
  - type: ErrorCatalog
    url: errors/on24-problem-types.yml
  - type: RateLimits
    url: rate-limits/on24-rate-limits.yml
  - type: DataModel
    url: data-model/on24-data-model.yml
  - type: ToolCrosswalk
    url: mcp/on24-tool-crosswalk.yml
- aid: on24:on24-content-listings-api
  name: On24 Content Listings API
  description: The Content Listings API from On24 — 3 operation(s) for content listings.
  humanURL: https://apidoc.on24.com/
  baseURL: https://api.on24.com/v2/
  tags:
  - Content Listings
  properties:
  - type: OpenAPI
    url: openapi/on24-content-listings-api-openapi.yml
  - type: Documentation
    url: https://apidoc.on24.com/
  - type: APIReference
    url: https://apidoc.on24.com/
  - type: Examples
    url: examples/_index.yml
  - type: Authentication
    url: authentication/on24-authentication.yml
  - type: Conventions
    url: conventions/on24-conventions.yml
  - type: ErrorCatalog
    url: errors/on24-problem-types.yml
  - type: RateLimits
    url: rate-limits/on24-rate-limits.yml
  - type: DataModel
    url: data-model/on24-data-model.yml
  - type: ToolCrosswalk
    url: mcp/on24-tool-crosswalk.yml
- aid: on24:on24-event-level-analytics-api
  name: On24 Event Level Analytics API
  description: The Event Level Analytics API from On24 — 16 operation(s) for event level analytics.
  humanURL: https://apidoc.on24.com/
  baseURL: https://api.on24.com/v2/
  tags:
  - Event Level Analytics
  properties:
  - type: OpenAPI
    url: openapi/on24-event-level-analytics-api-openapi.yml
  - type: Documentation
    url: https://apidoc.on24.com/
  - type: APIReference
    url: https://apidoc.on24.com/
  - type: Examples
    url: examples/_index.yml
  - type: Authentication
    url: authentication/on24-authentication.yml
  - type: Conventions
    url: conventions/on24-conventions.yml
  - type: ErrorCatalog
    url: errors/on24-problem-types.yml
  - type: RateLimits
    url: rate-limits/on24-rate-limits.yml
  - type: DataModel
    url: data-model/on24-data-model.yml
  - type: ToolCrosswalk
    url: mcp/on24-tool-crosswalk.yml
- aid: on24:on24-event-management-api
  name: On24 Event Management API
  description: The Event Management API from On24 — 12 operation(s) for event management.
  humanURL: https://apidoc.on24.com/
  baseURL: https://api.on24.com/v2/
  tags:
  - Event Management
  properties:
  - type: OpenAPI
    url: openapi/on24-event-management-api-openapi.yml
  - type: Documentation
    url: https://apidoc.on24.com/
  - type: APIReference
    url: https://apidoc.on24.com/
  - type: Examples
    url: examples/_index.yml
  - type: Authentication
    url: authentication/on24-authentication.yml
  - type: Conventions
    url: conventions/on24-conventions.yml
  - type: ErrorCatalog
    url: errors/on24-problem-types.yml
  - type: RateLimits
    url: rate-limits/on24-rate-limits.yml
  - type: DataModel
    url: data-model/on24-data-model.yml
  - type: ToolCrosswalk
    url: mcp/on24-tool-crosswalk.yml
- aid: on24:on24-helpers-api
  name: On24 Helpers API
  description: The Helpers API from On24 — 13 operation(s) for helpers.
  humanURL: https://apidoc.on24.com/
  baseURL: https://api.on24.com/v2/
  tags:
  - Helpers
  properties:
  - type: OpenAPI
    url: openapi/on24-helpers-api-openapi.yml
  - type: Documentation
    url: https://apidoc.on24.com/
  - type: APIReference
    url: https://apidoc.on24.com/
  - type: Examples
    url: examples/_index.yml
  - type: Authentication
    url: authentication/on24-authentication.yml
  - type: Conventions
    url: conventions/on24-conventions.yml
  - type: ErrorCatalog
    url: errors/on24-problem-types.yml
  - type: RateLimits
    url: rate-limits/on24-rate-limits.yml
  - type: DataModel
    url: data-model/on24-data-model.yml
  - type: ToolCrosswalk
    url: mcp/on24-tool-crosswalk.yml
- aid: on24:on24-rest-registration-api
  name: On24 REST Registration API
  description: The REST Registration API from On24 — 5 operation(s) for rest registration.
  humanURL: https://apidoc.on24.com/
  baseURL: https://api.on24.com/v2/
  tags:
  - REST Registration
  properties:
  - type: OpenAPI
    url: openapi/on24-rest-registration-api-openapi.yml
  - type: Documentation
    url: https://apidoc.on24.com/
  - type: APIReference
    url: https://apidoc.on24.com/
  - type: Examples
    url: examples/_index.yml
  - type: Authentication
    url: authentication/on24-authentication.yml
  - type: Conventions
    url: conventions/on24-conventions.yml
  - type: ErrorCatalog
    url: errors/on24-problem-types.yml
  - type: RateLimits
    url: rate-limits/on24-rate-limits.yml
  - type: DataModel
    url: data-model/on24-data-model.yml
  - type: ToolCrosswalk
    url: mcp/on24-tool-crosswalk.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: CapabilityMap
  url: capabilities/on24-capability-edges.yml
  name: On24 Business Capability Map
- type: Overlay
  url: overlays/on24-client-level-analytics-overlay.yaml
- type: Overlay
  url: overlays/on24-event-level-analytics-overlay.yaml
- type: Overlay
  url: overlays/on24-event-management-overlay.yaml
- type: Overlay
  url: overlays/on24-rest-registration-overlay.yaml
- type: Overlay
  url: overlays/on24-content-listings-overlay.yaml
- type: Overlay
  url: overlays/on24-helpers-overlay.yaml
- type: TrustCenter
  url: security/on24-trust-center.yml
- type: Website
  url: https://www.on24.com/
- type: Documentation
  url: https://apidoc.on24.com/
- type: APIReference
  url: https://apidoc.on24.com/
- type: Blog
  url: https://www.on24.com/blog/
- type: Compliance
  url: https://trust.on24.com/
- type: TermsOfService
  url: https://www.on24.com/terms-of-use/
- type: PrivacyPolicy
  url: https://www.on24.com/privacy-policy/
- type: Authentication
  url: authentication/on24-authentication.yml
- type: Conventions
  url: conventions/on24-conventions.yml
- type: Packages
  url: packages/on24-packages.yml
- type: X-MCPServerCandidate
  url: mcp/on24-mcp.yml
  note: 'Renamed from MCPServer 2026-09-03 (roadmap#247): the manifest self-describes as status: candidate — a tool list derived
    from the published API contracts, not an existing server. The scorer already read the manifest and reported mcp_server
    correctly; the MCPServer type was crediting the artifact-type surfaces with a server that does not exist.'
- type: LLMsTxt
  url: llms/on24-llms.txt
- type: Conformance
  url: conformance/on24-conformance.yml
- type: Lifecycle
  url: lifecycle/on24-lifecycle.yml
- type: DomainSecurity
  url: security/on24-domain-security.yml
- type: ErrorCatalog
  url: errors/on24-problem-types.yml
- type: RateLimits
  url: rate-limits/on24-rate-limits.yml
- type: DataModel
  url: data-model/on24-data-model.yml
- type: Examples
  url: examples/_index.yml
- type: AgentSkill
  url: skills/_index.yml
- type: ToolCrosswalk
  url: mcp/on24-tool-crosswalk.yml
- type: ChangeLog
  url: changelog/on24-changelog.yml
- type: StatusPage
  url: https://on24.statuspage.io/
- type: Plans
  url: plans/on24-plans-pricing.yml
- type: DeveloperPortal
  url: https://apidoc.on24.com/
- type: GettingStarted
  url: https://support.on24.com/hc/en-us/articles/21420794723739-Getting-Started-with-Connect-Integrations
- type: Support
  url: https://support.on24.com/hc/en-us

On24 API — frequently asked questions

Does On24 have an API?

Yes. APIs.io lists 6 APIs from On24, including On24 Client Level Analytics API, On24 Content Listings API and On24 Event Level Analytics API, and 3 more.

Is there an OpenAPI specification for the On24 API?

Yes. APIs.io indexes 6 OpenAPI specifications for On24, each linked for download from this page.

How do I authenticate with the On24 API?

On24 uses bearer-token authentication (apiKey · 2 schemes). The details are profiled on APIs.io as On24 Authentication.

Is the On24 API ready for AI agents?

On24 has a Kin Score of 43.7 out of 100 (developing) and an Agent Readiness score of 24.4 (agent-aware), scored by API Evangelist on 2026-11-06.

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