# www.holidays.rest

> Probe-verified (tier 2 of 3). Last checked 2026-08-23. 1 of 5 capability checks passed.

- host: www.holidays.rest
- url: https://www.holidays.rest/
- category: holiday api
- type: saas
- country: US
- locations: Germany, Australia, Austria, Belgium, Brazil, Canada, China, Denmark, Finland, France, Greece, India, Indonesia, Ireland, Israel, Italy, Japan, South Korea, Malaysia, Mexico, Netherlands, Norway, Philippines, Poland, Portugal, Russia, Singapore, South Africa, Spain, Sweden, Switzerland, Thailand, United States
- language: en

## Probe-verified · tier 2 of 3

Probed live on 2026-08-23 against rubric v1. 1 of 5 checks passed.

- fail — Markdown negotiation
- fail — Markdown twin at a predictable URL
- fail — llms.txt
- PASS — API catalog
- fail — MCP server answers

## Unverified actions

Read from the page's own content, with the wording each was drawn from. Inference is kept separate from tested facts; an agent completing the action is tier 3.

- **register** — "Register, grab an API key, and integrate in seconds"
- **query_api** — "Start using our holiday API in seconds with our comprehensive OpenAPI specification"
- **contact** — "Contact Us"
- **buy** — "Get Started"

## Summary

Holiday API offers accurate, up-to-date holiday data for 195+ countries with multiple formats and SDKs for developers.

## Context

2006 sites in this index share the type "saas"; 1410 are transactional.

## How we grade

- tier 1 — **Declared**: The site says agents are welcome in its robots.txt. A permission, not a capability.
- tier 2 — **Probe-verified** (this site): We fetched the site and tested each signal ourselves. Dated, repeatable, re-checked on a schedule.
- tier 3 — **Behaviourally verified**: An agent completed the action end to end — booked, bought, submitted — and it worked.

## About this record

Known-Good probes sites live and publishes what was tested and when.
Method: https://knowngood.sh/about.md · Rubric: https://knowngood.sh/benchmark