Install Jentic One Beta

Connect the Calendarific Holiday API to your agent

Jentic One is a self-hosted execution layer for AI agents. It lets your agent call the Calendarific Holiday API, or any other public or private API you need. You set the rules, the agent never sees your credentials, and every call is logged.

Two steps, two machines. Install the instance in a safe environment, then register your agent from wherever it runs.

Step 1: Jentic One Host machine

# On the machine that will host your Jentic One instance:
curl -fsSL "https://jentic.com/install.sh?src=apis&api=%2Fapis%2Fcalendarific.com%2Fcalendarific" | sh

Step 2: Agent machine

# On the machine where your agent runs (keep this separate from the instance):
curl -fsSL "https://jentic.com/install.sh?src=apis&api=%2Fapis%2Fcalendarific.com%2Fcalendarific" | sh
jentic register       # connects your agent to your Jentic One instance

Jentic One is in public beta. The setup above keeps your agent separate from the instance, which is what you want before using real credentials: an agent running as the same OS user as Jentic One can read its stored keys directly. Just evaluating? A single local install is fine to start. See the secure deployment guide for the tiers.

Capabilities

What an agent can do with Calendarific Holiday API.

Fetch public and observed holidays for a country and year

Filter holidays by type such as national or religious

List the countries supported for holiday lookups

List the languages available for localized holiday names

Use Cases

Patterns agents use Calendarific Holiday API for, with concrete tasks.

GET STARTED

Start building with Calendarific Holiday API

Explore with Jentic One

View OpenAPI Document

Business-day calculation

Payroll and SLA logic needs to know which days are holidays. The holiday list feeds a business-day calculator so a backend can compute deadlines that skip public holidays.

Fetch holidays for the current year and mark them as non-working days in a deadline calculation

AI agent holiday lookup

An AI agent planning tasks across regions can pull holiday data without hand-wiring the api_key query parameter. Through Jentic the agent discovers the holidays operation by intent and calls it with the stored key.

Search Jentic for 'get public holidays for a country', load the schema, and fetch holidays for a region

Key Endpoints

3 endpoints — the calendarific holiday api returns public, bank, and observed holidays for countries around the world.

METHOD

PATH

DESCRIPTION

GET

/holidays

List holidays for a country and year

GET

/countries

List supported countries

GET

/languages

List supported languages

GET

/holidays

List holidays for a country and year

GET

/countries

List supported countries

GET

/languages

List supported languages

Why Jentic?

What agents get from Jentic-routed access to this vendor.

Setup

Wiring the Calendarific Holiday API by hand means appending the api_key query parameter on every request and shaping the country and year filters yourself. Through Jentic you install once, import the API from the API Directory, store your credential once, and your agent calls it.

Permission scoping

The Calendarific Holiday API takes its inputs as query parameters rather than a resource id in the URL path, so you limit the agent to the operations it needs, such as listing holidays. You credit the agent only with the operations you allow, so anything else stays out unless you add it.

Credential isolation

Your the Calendarific credential is stored once, encrypted, by your own Jentic One instance and injected at execution time. It never enters the agent's prompt, logs, or context.

Intent-based discovery

Agents search Jentic by intent such as 'get public holidays for a country', and Jentic returns the matching operation with its input schema so the agent calls the right endpoint without browsing docs.

FAQs

Specific to using Calendarific Holiday API through Jentic.

What authentication does the Calendarific Holiday API use?

The Calendarific Holiday API authenticates with an API key passed as the api_key query parameter. Through Jentic the key is stored encrypted in your own instance and added to each request at run time.

Is there a the Calendarific Holiday API MCP server?

You don't need an MCP server to give your agent the Calendarific Holiday API. Jentic connects it directly from the API Directory: import it, store your credential once, and your agent calls it. That keeps another server's tool definitions out of your agent's context while still giving it the operation set from the spec.

Can the Calendarific Holiday API return holidays in different languages?

Yes. The GET /languages operation lists the supported languages, and holiday requests can return localized names so a calendar can display holidays in the user's language.

Can I limit what my agent is allowed to do with the Calendarific Holiday API?

Yes. Because you run Jentic One yourself, your own rules decide which the Calendarific Holiday API operations and credentials the agent may use. You grant only the operations it needs, such as listing holidays, so any operation you have not granted stays off limits unless you add it. The choice of what the agent may call is yours.

How do I connect my agent to the Calendarific Holiday API through Jentic?

Search Jentic by intent such as 'get public holidays for a country' to discover the operation, load its input schema, and your agent calls it with your stored credential injected at run time. To run it on your own infrastructure, install Jentic One from its GitHub repo.

Calendarific Holiday API

AI ReadinessFoundational (D)46/100

See full scorecard

Official vendor OpenAPI document · agent-readyProductivityCalendar SchedulingapiKey3 EndpointsREST

For Agents

Fetch public and observed holidays for a country and year, and list supported countries and languages.

Use for: I need the public holidays for a country this year, List the national holidays for a given date range, Check which countries the holiday data supports, Get holiday names in a specific language

Not supported: Does not handle event scheduling, reminders, or calendar storage - use for looking up public and observed holidays only.

The Calendarific Holiday API returns public, bank, and observed holidays for countries around the world. It lists holidays for a country and year, the supported countries, and the available languages for localized names. Requests authenticate with an API key passed as the api_key query parameter.

Jentic One on Github View OpenAPI Document

Show dimension breakdown

100

Foundational Compliance

Base layer of spec validity and structural soundness.

Grade: A+Signals: 4

99%

Lint Results

Aggregated quality score from linter diagnostics, weighted by severity.

100%

Resolution Completeness

Percentage of `$ref` references that resolve successfully.

100%

Specification Validity

Checks whether the API description parses successfully and conforms to its declared specification (e.g., OpenAPI).

100%

Structural Integrity

Structural correctness score based on schema issues using logarithmic dampening.

Developer Experience & Jentic Compatibility

Clarity, completeness, and ingestion readiness for developers and tooling.

Grade: B-Signals: 4

Example Density

How richly the API is illustrated with examples.

100%

Example Validity

Percentage of examples that conform to their schemas.

50%

Response Coverage

Percentage of operations with complete response definitions (success, client error, server error).

100%

Tooling Readiness

Health of API ingestion, bundling, and resolution within Jentic pipelines.

AI-Readiness & Agent Experience

Semantic breadth, depth, and agent comprehension for AI systems.

Grade: DSignals: 4

34%

Description Coverage

Coverage of descriptions across API elements.

Error Standardization

Coverage of RFC 9457 Problem Details for error responses.

100%

OperationId Quality

Coverage, uniqueness, and casing consistency of operationIds for AI inference.

50%

Summary Coverage

Coverage of summaries across operations/tags/info.

Agent Usability

Functional utility, complexity comfort, and AI orchestration readiness.

Grade: A+Signals: 1

94%

Complexity Comfort

Agent comfort level based on API operational and structural complexity.

Security

Trust, risk posture, and security compliance.

Grade: FSignals: 1

15%

Authentication Strength

Average quality of security schemes based on authentication method strength (weakest link for OAuth2).

AI Discoverability

Findability, semantic richness, and reasoning readiness.

Grade: C-Signals: 1

50%

Descriptive Richness

Clarity and depth of descriptions across API elements.

Connect the Calendarific Holiday API to your agent

Capabilities

Use Cases

Start building with Calendarific Holiday API

Key Endpoints

Why Jentic?

Related APIs

FAQs

Calendarific Holiday API

Jentic AI Readiness Score

Calendarific Holiday API

Foundational Compliance

Lint Results

Resolution Completeness

Specification Validity

Structural Integrity

Developer Experience & Jentic Compatibility

Example Density

Example Validity

Response Coverage

Tooling Readiness

AI-Readiness & Agent Experience

Description Coverage

Error Standardization

OperationId Quality

Summary Coverage

Agent Usability

Complexity Comfort

Security

Authentication Strength

AI Discoverability

Descriptive Richness