Herokuapp MeowFacts API
72
AI ReadinessAI-Aware (A-)72/100
Agent-ready OpenAPI document · curated by JenticData EnrichmentData Transformationnone1 EndpointsREST
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For Agents
Fetch one or more random cat facts as JSON, optionally localised by language, with no authentication required.
Use for: I need a random cat fact for a daily message, I want to fetch ten cat facts in a single request, Get a Spanish-language cat fact, Retrieve a cat fact to seed a demo prompt
Not supported: Does not return dog facts, animal images, or general trivia, and offers no SLA - use for fetching random cat fact strings only.
Jentic publishes the only available OpenAPI specification for MeowFacts API, keeping it validated and agent-ready. MeowFacts is a free public API that returns random cat facts as JSON. It supports an optional language parameter for localised facts and an optional count parameter to retrieve several facts in a single call. The endpoint requires no authentication and is well suited to demos, onboarding examples, and lightweight content generation where a single deterministic response is needed.
Install Jentic One Beta
Connect the MeowFacts API to your agent
Jentic One is a self-hosted execution layer for AI agents. It lets your agent call the MeowFacts 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.
1
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%2Fherokuapp.com%2Fmeowfacts" | sh2
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%2Fherokuapp.com%2Fmeowfacts" | sh
jentic register # connects your agent to your Jentic One instanceJentic 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 MeowFacts API.
Retrieve a random cat fact as a JSON response from GET /
Request multiple facts in a single call via the count query parameter
Localise facts using the lang query parameter where translations are available
Use the API anonymously without an API key, OAuth flow, or signed request
Use Cases
Patterns agents use MeowFacts API for, with concrete tasks.
★ Daily Cat Fact in Team Chat
A small bot can call MeowFacts once a day and post the result into Slack, Discord, or Teams as a low-stakes morning message. The single endpoint returns clean JSON that drops into a chat post template, so the bot is one HTTP call and one formatter. This is a popular onboarding example for chat integrations.
GET / and post the response.data[0] string into the chat channel as the daily message.
Demo and Onboarding Examples
MeowFacts is widely used as a teaching API for HTTP clients, OpenAPI generators, and integration tutorials because it has no auth, one endpoint, and a tiny response shape. Tutorials can show a working call in a few lines of code without sign-up friction. This makes it ideal for first-touch developer experience material.
GET / from a fresh client and assert the response contains a non-empty data array.
Bulk Fact Retrieval for Content Seeding
When a content team needs a small bank of cat facts for a marketing site or quiz, the count parameter returns several facts in one call. The output can be written to a static JSON file and used as build-time content. This avoids loops over the endpoint and keeps the deployment self-contained.
GET /?count=20 and write the response.data array to a static facts.json file.
AI Agent Quick Demo Tool
When demoing an AI agent's tool-use capabilities, MeowFacts is a perfect zero-friction tool - no auth, one endpoint, and an obvious output. Through Jentic the agent searches by intent, loads the schema, and executes, exercising the full search-load-execute path without a real-world dependency. This is helpful for live demos and integration smoke tests.
Search Jentic for 'get a random cat fact', load the GET / schema, and execute with no parameters.
Key Endpoints
1 endpoints — jentic publishes the only available openapi specification for meowfacts api, keeping it validated and agent-ready.
METHOD
PATH
DESCRIPTION
GET
/
Get one or more random cat facts
GET
/
Get one or more random cat facts
Jentic AI Readiness Score
This API is usable in Jentic One now. Its AI-readiness score against Jentic's framework shows where it stands today and where improvements would make it even easier for agents to use.
M
MeowFacts API
- AI-Aware (A-)72/100
100
Foundational Compliance63
Developer Experience & Jentic Compatibility52
AI-Readiness & Agent Experience94
Agent Usability100
Security75
AI DiscoverabilityPowered by JenticScoring Framework 1.0.0 | Scoring Engine 0.4.0
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.
63
Developer Experience & Jentic Compatibility
Clarity, completeness, and ingestion readiness for developers and tooling.
Grade: B-Signals: 4
0%
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.
52
AI-Readiness & Agent Experience
Semantic breadth, depth, and agent comprehension for AI systems.
Grade: C-Signals: 4
56%
Description Coverage
Coverage of descriptions across API elements.
0%
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.
94
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.
100
Security
Trust, risk posture, and security compliance.
Grade: A+Signals: 1
100%
Authentication Strength
Average quality of security schemes based on authentication method strength (weakest link for OAuth2).
75
AI Discoverability
Findability, semantic richness, and reasoning readiness.
Grade: A-Signals: 1
75%
Descriptive Richness
Clarity and depth of descriptions across API elements.
Score it yourself
Every API in the directory is allowlisted, so you can re-score it with no key required.
npx @jentic/api-scorecard-cli score <openapi-url>Why Jentic?
What agents get from Jentic-routed access to this vendor.
Setup
The MeowFacts API needs no auth, so wiring it by hand still means handling the query parameters and writing your own retry logic around its single endpoint. Through Jentic you install once, import the MeowFacts API from the API Directory, and your agent calls it with consistent retry handling like any other operation.
Permission scoping
MeowFacts exposes one read-only GET operation that returns random cat facts, with count and lang passed as query parameters rather than a resource id, so limit the agent to that single fetch operation. There is nothing to write or delete, so the allowed set is exactly the read it needs.
Credential isolation
MeowFacts is unauthenticated, so there is no credential to store, and your Jentic One instance forwards the call directly. No secret ever enters the agent's prompt, logs, or context.
Intent-based discovery
Agents search Jentic by intent such as 'get a random cat fact', and Jentic returns the MeowFacts GET operation with its query parameter schema so the agent picks count and lang without reading the docs.
Related APIs
Alternatives and complements available in the Jentic catalogue.
FAQs
Specific to using MeowFacts API through Jentic.
Why is there no official OpenAPI spec for MeowFacts API?
MeowFacts is a community project that does not publish a formal OpenAPI specification. Jentic generates and maintains this spec so that AI agents and developers can call MeowFacts API via structured tooling. It is validated against the live API and kept up to date. Get started with Jentic One, the self-hosted execution layer.
What authentication does the MeowFacts API use?
MeowFacts is a free public API that requires no authentication - there is no API key, OAuth flow, or signed request. Calls are anonymous, so do not send any sensitive context in query parameters.
Can I get more than one cat fact in a single call?
Yes. GET / accepts an optional count query parameter to return multiple facts in one response. The response.data array contains as many strings as requested, up to a service-side maximum.
What are the rate limits for the MeowFacts API?
MeowFacts does not document a strict rate limit. As a free Heroku-hosted service it can be slow under bursty load and may sleep when idle. Cache the result for a few minutes when used at scale rather than calling it on every page view.
How do I fetch a cat fact through Jentic?
Search Jentic for 'get a random cat fact', load the GET / schema, and execute. Because the API has no auth, Jentic forwards the call directly with no credential injection.
Is MeowFacts suitable for production use?
It is best suited to demos, tutorials, and lightweight chat bots. For production-grade content or guaranteed uptime, host the facts statically or pick a paid content API - the public Heroku endpoint has no SLA.
Can I limit what my agent is allowed to do with the MeowFacts API?
Yes. Jentic One runs on your own infrastructure, and you write the rules that decide which operations and credentials your agent may use. The MeowFacts API exposes a single read-only GET operation that returns random cat facts, with count and lang passed as query parameters, so you can allow just that one fetch and nothing else. There is nothing to write or delete, so the permitted set is exactly the read the agent needs.
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