HeadOut

Headout is a global experiences marketplace that curates and sells tickets to tours, attractions, events, shows and activities across major cities worldwide. For developers, Headout operates a public Partner API (github.com/headout/api-docs) that lets affiliates and resellers browse the catalog (products, categories, collections and subcategories by city and language), pull live inventory and per-person/per-group pricing for a variant, and place bookings through a two-step create-then-capture flow. The API is versioned by URI path (v1 and v2 under /api/public/), authenticates with a Headout-Auth API key (pk_ production / tk_ sandbox), paginates with offset/limit, and returns a structured error envelope. A registrable seatmap iframe component is offered for seat selection. Headout is backed by 500 Global and Version One Ventures.

HeadOut publishes 6 APIs on the APIs.io network, including Booking API, Categories API, Collections API, and 3 more. Tagged areas include Travel, Tours and Activities, Experience, Attractions, and Ticketing.

HeadOut’s developer surface includes documentation, API reference, getting-started guide, engineering blog, support, signup flow, authentication, and 20 more developer resources.

🌐 Visit website 📡 Source on GitHub

19.0/100 emerging ▬ flat Agent 24/100 agent aware Front door AI 1/6 silent saas Full breakdown ↓
scored 2026-09-19 · rubric v0.22.0

1 APIs

Travel Tours and Activities Experience Attractions Ticketing Booking Marketplace Partner API Affiliates Event

Kin Score

Kin Score How this is scored →
scored 2026-09-19 · rubric v0.22.0

Composite quality — 19.0/100 · emerging

Contract Quality 3.1 / 23

Developer Ergonomics 3.7 / 18

Access Clarity 2.4 / 18

Operational Transparency 1.2 / 12

Contract Governance 0.5 / 11

Discoverability 6.8 / 9

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 24/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 9 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 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

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.

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 github.com/api-evangelist/headout: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 6

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

HeadOut Booking API

The Booking API from HeadOut — 2 operation(s) for booking.

HeadOut Categories API

The Categories API from HeadOut — 1 operation(s) for categories.

HeadOut Collections API

The Collections API from HeadOut — 1 operation(s) for collections.

HeadOut Inventory API

The Inventory API from HeadOut — 1 operation(s) for inventory.

HeadOut Products API

The Products API from HeadOut — 1 operation(s) for products.

HeadOut Subcategories API

The Subcategories API from HeadOut — 1 operation(s) for subcategories.

Open Collections 7

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

API Collection

OPEN COLLECTION

Headout Partner Booking API

OPEN COLLECTION

Headout Partner Booking Categories API

OPEN COLLECTION

Headout Partner Booking Collections API

OPEN COLLECTION

Headout Partner Booking Inventory API

OPEN COLLECTION

Headout Partner Booking Products API

OPEN COLLECTION

Headout Partner Booking Subcategories API

OPEN COLLECTION

Scroll for all 7

Security Posture 2

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

Headout Authentication

apiKey · 1 scheme

SECURITY

Headout Domain Security

TLSv1.3 · DMARC

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Headout Agentic Access

9 operations · 2 acting

AGENTIC

Resources

Get Started 4

Portal, sign-up, and the first successful call

DeveloperPortal

GettingStarted

SignUp

Sandbox

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

X-MCPServerCandidate

X-MCPServerCandidate

LLMsTxt

LLMsTxt

AgentSkill

AgentSkill

Design & Contract 7

Pagination, idempotency, versioning, errors, and events

Conventions

Idempotency

ErrorCatalog

Lifecycle

Conformance

DataModel

Components

Scroll for all 7

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 2

Status, limits, changes, and where to get help

Support

Support

Deprecation

Deprecation

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 1

Properties that don't map to a standard resource type

Overlay

Overlay

Source (apis.yml)

aid: headout
name: HeadOut
description: Headout is a global experiences marketplace that curates and sells tickets to tours, attractions, events, shows
  and activities across major cities worldwide. For developers, Headout operates a public Partner API (github.com/headout/api-docs)
  that lets affiliates and resellers browse the catalog (products, categories, collections and subcategories by city and language),
  pull live inventory and per-person/per-group pricing for a variant, and place bookings through a two-step create-then-capture
  flow. The API is versioned by URI path (v1 and v2 under /api/public/), authenticates with a Headout-Auth API key (pk_ production
  / tk_ sandbox), paginates with offset/limit, and returns a structured error envelope. A registrable seatmap iframe component
  is offered for seat selection. Headout is backed by 500 Global and Version One Ventures.
url: https://raw.githubusercontent.com/api-evangelist/headout/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- 500-global
- version-one-ventures
x-tier: profiled
x-tier-reason: partner-api-enriched
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: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - security
  - sandbox
  generated: '2026-09-03'
  method: derived
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-19'
image: https://cdn-imgix.headout.com/static-pages/logo.png
tags:
- Travel
- Tours and Activities
- Experience
- Attractions
- Ticketing
- Booking
- Marketplace
- Partner API
- Affiliates
- Event
tags_raw:
- Travel
- Tours and Activities
- Experiences
- Attractions
- Ticketing
- Bookings
- Marketplace
- Partner API
- Affiliate
- Events
apis:
- aid: headout:headout-booking-api
  name: HeadOut Booking API
  description: The Booking API from HeadOut — 2 operation(s) for booking.
  humanURL: https://github.com/headout/api-docs
  baseURL: https://www.headout.com/api/public/v2
  tags:
  - Booking
  properties:
  - type: OpenAPI
    url: openapi/headout-booking-api-openapi.yml
  - type: Documentation
    url: https://github.com/headout/api-docs
  - type: APIReference
    url: https://github.com/headout/api-docs/tree/master/apis
  - type: GettingStarted
    url: https://github.com/headout/api-docs/wiki/Integration-flow-for-Partners
  - type: Authentication
    url: authentication/headout-authentication.yml
- aid: headout:headout-categories-api
  name: HeadOut Categories API
  description: The Categories API from HeadOut — 1 operation(s) for categories.
  humanURL: https://github.com/headout/api-docs
  baseURL: https://www.headout.com/api/public/v2
  tags:
  - Categories
  properties:
  - type: OpenAPI
    url: openapi/headout-categories-api-openapi.yml
  - type: Documentation
    url: https://github.com/headout/api-docs
  - type: APIReference
    url: https://github.com/headout/api-docs/tree/master/apis
  - type: GettingStarted
    url: https://github.com/headout/api-docs/wiki/Integration-flow-for-Partners
  - type: Authentication
    url: authentication/headout-authentication.yml
- aid: headout:headout-collections-api
  name: HeadOut Collections API
  description: The Collections API from HeadOut — 1 operation(s) for collections.
  humanURL: https://github.com/headout/api-docs
  baseURL: https://www.headout.com/api/public/v2
  tags:
  - Collection
  tags_raw:
  - Collections
  properties:
  - type: OpenAPI
    url: openapi/headout-collections-api-openapi.yml
  - type: Documentation
    url: https://github.com/headout/api-docs
  - type: APIReference
    url: https://github.com/headout/api-docs/tree/master/apis
  - type: GettingStarted
    url: https://github.com/headout/api-docs/wiki/Integration-flow-for-Partners
  - type: Authentication
    url: authentication/headout-authentication.yml
- aid: headout:headout-inventory-api
  name: HeadOut Inventory API
  description: The Inventory API from HeadOut — 1 operation(s) for inventory.
  humanURL: https://github.com/headout/api-docs
  baseURL: https://www.headout.com/api/public/v2
  tags:
  - Inventory
  properties:
  - type: OpenAPI
    url: openapi/headout-inventory-api-openapi.yml
  - type: Documentation
    url: https://github.com/headout/api-docs
  - type: APIReference
    url: https://github.com/headout/api-docs/tree/master/apis
  - type: GettingStarted
    url: https://github.com/headout/api-docs/wiki/Integration-flow-for-Partners
  - type: Authentication
    url: authentication/headout-authentication.yml
- aid: headout:headout-products-api
  name: HeadOut Products API
  description: The Products API from HeadOut — 1 operation(s) for products.
  humanURL: https://github.com/headout/api-docs
  baseURL: https://www.headout.com/api/public/v2
  tags:
  - Product
  tags_raw:
  - Products
  properties:
  - type: OpenAPI
    url: openapi/headout-products-api-openapi.yml
  - type: Documentation
    url: https://github.com/headout/api-docs
  - type: APIReference
    url: https://github.com/headout/api-docs/tree/master/apis
  - type: GettingStarted
    url: https://github.com/headout/api-docs/wiki/Integration-flow-for-Partners
  - type: Authentication
    url: authentication/headout-authentication.yml
- aid: headout:headout-subcategories-api
  name: HeadOut Subcategories API
  description: The Subcategories API from HeadOut — 1 operation(s) for subcategories.
  humanURL: https://github.com/headout/api-docs
  baseURL: https://www.headout.com/api/public/v2
  tags:
  - Subcategories
  properties:
  - type: OpenAPI
    url: openapi/headout-subcategories-api-openapi.yml
  - type: Documentation
    url: https://github.com/headout/api-docs
  - type: APIReference
    url: https://github.com/headout/api-docs/tree/master/apis
  - type: GettingStarted
    url: https://github.com/headout/api-docs/wiki/Integration-flow-for-Partners
  - type: Authentication
    url: authentication/headout-authentication.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: AgenticAccess
  url: agentic-access/headout-agentic-access.yml
- type: DomainSecurity
  url: security/headout-domain-security.yml
- type: Website
  url: https://headout.com
- type: DeveloperPortal
  url: https://github.com/headout/api-docs
- type: Documentation
  url: https://github.com/headout/api-docs
- type: APIReference
  url: https://github.com/headout/api-docs/tree/master/apis
- type: GettingStarted
  url: https://github.com/headout/api-docs/wiki/Integration-flow-for-Partners
- type: GitHubOrganization
  url: https://github.com/headout
- type: Blog
  url: https://www.headout.com/blog/
- type: Support
  url: https://www.headout.com/help/
- type: SignUp
  url: https://partner.headout.com/affiliate/
- type: TermsOfService
  url: https://www.headout.com/terms-of-use/
- type: PrivacyPolicy
  url: https://www.headout.com/privacy-policy/
- type: Authentication
  url: authentication/headout-authentication.yml
- type: Conventions
  url: conventions/headout-conventions.yml
- type: Idempotency
  url: conventions/headout-conventions.yml
- type: ErrorCatalog
  url: errors/headout-error-codes.yml
- type: Lifecycle
  url: lifecycle/headout-lifecycle.yml
- type: Deprecation
  url: lifecycle/headout-lifecycle.yml
- type: X-MCPServerCandidate
  url: mcp/headout-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/headout-llms.txt
- type: Overlay
  url: overlays/headout-partner-overlay.yaml
- type: Conformance
  url: conformance/headout-conformance.yml
- type: DataModel
  url: data-model/headout-data-model.yml
- type: Sandbox
  url: sandbox/headout-sandbox.yml
- type: Components
  url: components/headout-components.yml
- type: AgentSkill
  url: skills/_index.yml
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence

Work with this as data

Every provider here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for providers

9 MCP tools reach this

find_providersBrowse and filter every provider in the catalog.
get_provider_artifactsEvery artifact this provider publishes, grouped by type.
get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

All 92 tools →

Call it yourself

curl for this page

This provider

curl "https://apis.io/api/v1/providers/headout"

All providers

curl "https://apis.io/api/v1/providers?limit=25"

Every operation they expose

curl "https://apis.io/api/v1/providers/headout/operations?limit=25"

How their score was established

curl "https://apis.io/api/v1/providers/headout/evidence"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.