Hotel Tonight

HotelTonight is a last-minute hotel booking service founded in 2010 in San Francisco and acquired by Airbnb in 2019 for a reported $400 million. Through its mobile app and website it offers curated same-day and near-term deals on boutique, independent, and chain hotels across thousands of cities worldwide, with more than 15 million app downloads. Its developer surface is a partner/agent-facing portal (api-docs.hoteltonight.com) rather than a publicly documented API; this profile is maintained in the API Evangelist network as an enrichment lead.

Hotel Tonight is listed with 1 API on the APIs.io network. Tagged areas include Company, Consumer, Travel, Hotels, and Booking.

Hotel Tonight’s developer surface includes support, documentation, signup flow, authentication, and 11 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

31.2/100 thin ▬ flat Agent 3/100 human only saas Full breakdown ↓
scored 2026-11-02 · rubric v0.26.0 · Show this score on your site →

1 API

Company Consumer Travel Hotels Booking Hospitality Mobile Airbnb

Kin Score

Kin Score How this is scored →
scored 2026-11-02 · rubric v0.26.0

Composite quality — 31.2/100 · thin

Contract Quality 0.0 / 21

Developer Ergonomics 7.3 / 17

Access Clarity 7.2 / 17

Operational Transparency 1.5 / 11

Contract Governance 1.9 / 10

Discoverability 6.2 / 9

Regulatory Posture 5.3 / 15

Agent readiness — 3/100 · human only

Machine-Readable Contract 0 / 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 0 / 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 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 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):

Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document
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

12 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 0.0 — up to +25.0 composite points
Access Clarity scores 42.1 — up to +11.6 composite points
Developer Ergonomics scores 42.9 — up to +11.4 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/hotel-tonight/apis.yml: open an issue on github.com/api-evangelist/hotel-tonight 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
Mobile SDK Publishers (Play SDK Index, CocoaPods, ADA certification)	covered	34.5 (thin)	-	-

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.

APIs 1

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

HotelTonight Partner API

Auth-gated partner/agent API portal for HotelTonight hotel supply and booking operations. Requires partner-agent credentials; no public OpenAPI is published.

Security Posture 3

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

Hotel Tonight Authentication

http · 1 scheme

SECURITY

Hotel Tonight Domain Security

TLSv1.2 · HSTS · DMARC

SECURITY

Hotel Tonight Vulnerability Disclosure

no policy recorded

SECURITY

Resources

Get Started 2

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

SignUp

SignUp

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

Design & Contract 1

Pagination, idempotency, versioning, errors, and events

Conformance

Conformance

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 5

Authentication, authorization, and security posture

Security

Security

Compliance

Compliance

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 1

The organization behind the API

Website

Website

Source (apis.yml)

aid: hotel-tonight
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: '2026-11-02'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/hotel-tonight.png
name: Hotel Tonight
description: HotelTonight is a last-minute hotel booking service founded in 2010 in San Francisco and acquired by Airbnb in
  2019 for a reported $400 million. Through its mobile app and website it offers curated same-day and near-term deals on boutique,
  independent, and chain hotels across thousands of cities worldwide, with more than 15 million app downloads. Its developer
  surface is a partner/agent-facing portal (api-docs.hoteltonight.com) rather than a publicly documented API; this profile
  is maintained in the API Evangelist network as an enrichment lead.
url: https://raw.githubusercontent.com/api-evangelist/hotel-tonight/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- accel
- ggv-capital
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-08-08'
tags:
- Company
- Consumer
- Travel
- Hotels
- Booking
- Hospitality
- Mobile
- Airbnb
apis:
- name: HotelTonight Partner API
  description: Auth-gated partner/agent API portal for HotelTonight hotel supply and booking operations. Requires partner-agent
    credentials; no public OpenAPI is published.
  humanURL: https://api-docs.hoteltonight.com/
  baseURL: https://api.hoteltonight.com
  properties:
  - type: APIReference
    url: https://api-docs.hoteltonight.com/
  - type: Documentation
    url: https://api-docs.hoteltonight.com/
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://www.hoteltonight.com
- type: Support
  url: https://www.hoteltonight.com/customer-support
- type: TermsOfService
  url: https://www.hoteltonight.com/terms-of-use
- type: PrivacyPolicy
  url: https://www.hoteltonight.com/terms-of-use/privacy-policy
- type: GitHubOrganization
  url: https://github.com/hoteltonight
- type: Security
  url: https://www.hoteltonight.com/terms-of-use/security
- type: Compliance
  url: https://www.hoteltonight.com/terms-of-use/security
- type: VulnerabilityDisclosure
  url: security/hotel-tonight-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/hotel-tonight-domain-security.yml
- type: Conformance
  url: conformance/hotel-tonight-conformance.yml
- type: LLMsTxt
  url: llms/hotel-tonight-llms.txt
- type: DeveloperPortal
  url: https://api-docs.hoteltonight.com/
- type: Documentation
  url: https://api-docs.hoteltonight.com/
- type: SignUp
  url: https://www.hoteltonight.com/hotel-partners
- type: Authentication
  url: authentication/hotel-tonight-authentication.yml
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence
x-merged-from:
- hoteltonight

Hotel Tonight API — frequently asked questions

Does Hotel Tonight have an API?

Yes. APIs.io lists 1 API from Hotel Tonight, including HotelTonight Partner API.

How do I authenticate with the Hotel Tonight API?

Hotel Tonight uses bearer-token authentication (http · 1 scheme). The details are profiled on APIs.io as Hotel Tonight Authentication.

Is the Hotel Tonight API ready for AI agents?

Hotel Tonight has a Kin Score of 31.2 out of 100 (thin) and an Agent Readiness score of 2.5 (human-only), scored by API Evangelist on 2026-11-02.

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Tools for providers

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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.

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