ActivityHero

ActivityHero is an online marketplace connecting families with kids' camps, classes, and enrichment activities — a one-stop shop to find top-rated summer camps, holiday camps, and after-school classes near you across categories like art, science, sports, dance, and online programs. For activity providers it offers marketing and registration software (MarketingHero and custom registration software) plus programs for school districts. ActivityHero's developer surface is a provider integration built on outbound, HMAC-SHA256 signed JSON webhooks (a Registration API and a Schedule API) rather than a public REST API; it was surfaced as a portfolio company of 500 Global and enriched into the API Evangelist network from its published help-center docs.

ActivityHero is listed with 1 API on the APIs.io network. Tagged areas include Company, Kids Activities, Camps, Classes, and Marketplace.

The ActivityHero catalog on APIs.io includes 1 event-driven AsyncAPI specification.

ActivityHero’s developer surface includes authentication, documentation, engineering blog, pricing, and 10 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

29.4/100 thin ▬ flat Agent 20/100 agent aware Front door AI 1/6 silent Heartbeat 18/100 dormant saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

1 API

CompanyKids ActivitiesCampsClasses Marketplace Registration Webhook Education

Kin Score

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

Composite quality — 29.4/100 · thin

Contract Quality 8.3 / 21

Developer Ergonomics 4.9 / 17

Access Clarity 5.4 / 17

Operational Transparency 0.9 / 11

Contract Governance 0.0 / 10

Discoverability 5.5 / 9

Regulatory Posture 2.9 / 15

Agent readiness — 20/100 · 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 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 6 / 6

Agent Skills 0 / 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 Education & Research 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 could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% 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)
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)

10 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 39.0 — up to +15.3 composite points
Developer Ergonomics scores 28.6 — up to +14.3 composite points
Access Clarity scores 31.6 — up to +13.7 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/activityhero/apis.yml: open an issue on github.com/api-evangelist/activityhero 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 →

APIs 1

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

ActivityHero Registration & Schedule Webhooks

ActivityHero's provider integration surface — outbound, HMAC-SHA256-signed JSON webhooks that sync registrations and activity schedules between ActivityHero and a provider's own...

Event Specifications 1

AsyncAPI definitions for this provider's event-driven and streaming APIs.

Activityhero Webhooks

ASYNCAPI

Security Posture 2

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

Activityhero Authentication

signature · 1 scheme

SECURITY

Activityhero Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

WellKnown

WellKnown

LLMsTxt

LLMsTxt

Design & Contract 2

Pagination, idempotency, versioning, errors, and events

Webhooks

Webhooks

Conventions

Conventions

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

HelpCenter

HelpCenter

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 3

The organization behind the API

BlogRSS

BlogRSS

Blog

Blog

Website

Website

Source (apis.yml)

aid: activityhero
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - security
  generated: '2026-11-06'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/activityhero.png
name: ActivityHero
description: ActivityHero is an online marketplace connecting families with kids' camps, classes, and enrichment activities
  — a one-stop shop to find top-rated summer camps, holiday camps, and after-school classes near you across categories like
  art, science, sports, dance, and online programs. For activity providers it offers marketing and registration software (MarketingHero
  and custom registration software) plus programs for school districts. ActivityHero's developer surface is a provider integration
  built on outbound, HMAC-SHA256 signed JSON webhooks (a Registration API and a Schedule API) rather than a public REST API;
  it was surfaced as a portfolio company of 500 Global and enriched into the API Evangelist network from its published help-center
  docs.
url: https://raw.githubusercontent.com/api-evangelist/activityhero/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- 500-global
x-tier: enriched
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-10-06'
tags:
- Company
- Kids Activities
- Camps
- Classes
- Marketplace
- Registration
- Webhook
- Education
tags_raw:
- Company
- Kids Activities
- Camps
- Classes
- Marketplace
- Registration
- Webhooks
- Education
apis:
- name: ActivityHero Registration & Schedule Webhooks
  description: ActivityHero's provider integration surface — outbound, HMAC-SHA256-signed JSON webhooks that sync registrations
    and activity schedules between ActivityHero and a provider's own systems (configured under Manage Listing > API; Zapier-compatible).
  humanURL: https://help.activityhero.com/api
  tags:
  - Webhook
  - Registration
  - Schedule
  tags_raw:
  - Webhooks
  - Registration
  - Schedules
  properties:
  - type: Documentation
    url: https://help.activityhero.com/api
  - type: Webhooks
    url: asyncapi/activityhero-webhooks.yml
  - type: Authentication
    url: authentication/activityhero-authentication.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- url: https://www.activityhero.com/blog/feed/
  type: BlogRSS
- type: Webhooks
  url: asyncapi/activityhero-webhooks.yml
- type: Authentication
  url: authentication/activityhero-authentication.yml
- type: Conventions
  url: conventions/activityhero-conventions.yml
- type: WellKnown
  url: well-known/activityhero-well-known.yml
- type: LLMsTxt
  url: llms/activityhero-llms.txt
- type: DomainSecurity
  url: security/activityhero-domain-security.yml
- type: Documentation
  url: https://help.activityhero.com/api
- type: HelpCenter
  url: https://help.activityhero.com
- type: Blog
  url: https://www.activityhero.com/blog/
- type: Pricing
  url: https://business.activityhero.com/pricing
- type: TermsOfService
  url: https://activityhero.com/pages/terms
- type: PrivacyPolicy
  url: https://activityhero.com/pages/privacy
- type: Website
  url: https://activityhero.com
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence

ActivityHero API — frequently asked questions

Does ActivityHero have an API?

Yes. APIs.io lists 1 API from ActivityHero, including ActivityHero Registration & Schedule Webhooks.

How do I authenticate with the ActivityHero API?

ActivityHero uses bearer-token authentication (signature · 1 scheme). The details are profiled on APIs.io as Activityhero Authentication.

Is the ActivityHero API ready for AI agents?

ActivityHero has a Kin Score of 29.4 out of 100 (thin) and an Agent Readiness score of 19.8 (agent-aware), scored by API Evangelist on 2026-11-06.

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