JSONPlaceholder website screenshot

JSONPlaceholder

Free fake REST API for testing and prototyping providing mock data for posts, comments, albums, photos, todos, and users without any setup. Handles approximately 3 billion requests per month and supports all standard HTTP methods with CORS and JSONP support.

JSONPlaceholder publishes 1 API on the APIs.io network: Posts API. Tagged areas include Fake API, Testing, Prototyping, Mock Data, and REST.

The JSONPlaceholder catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

JSONPlaceholder’s developer surface includes documentation, engineering blog, pricing, and 9 more developer resources.

🌐 Visit website 📡 Source on GitHub
35.4/100 thin ▬ flat Agent 22/100 agent aware Full breakdown ↓
scored 2026-07-28 · rubric v0.6
AccessFreeOpen⚡ Free to try
1 APIs
Fake APITestingPrototypingMock DataRESTOpen Source

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-28 · rubric v0.6
Composite quality — 35.4/100 · thin
Contract Quality 10.8 / 25
Developer Ergonomics 2.2 / 20
Commercial Clarity 7.9 / 20
Operational Transparency 0.7 / 13
Governance 7.0 / 12
Discoverability 6.9 / 10
Agent readiness — 22/100 · agent aware
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
MCP Server 0 / 12
Machine-Readable Auth 0 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 7 / 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
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/json-placeholder: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 1

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

JSONPlaceholder Posts API

The Posts API from JSONPlaceholder — 2 operation(s) for posts.

Pricing Plans 1

Published pricing tiers and plan structures.

Json Placeholder Plans Pricing

1 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Json Placeholder Rate Limits

0 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Json Placeholder Finops

FINOPS

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

context Context

1 classes · 4 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

JSONPlaceholder API Rules

4 rules · 3 warnings 1 info

SPECTRAL

JSON Schema 1

Standalone JSON Schema definitions for this provider's data models.

Post

4 properties

JSON SCHEMA

Examples 2

Example request and response payloads for these APIs.

Create Post Request

3 fields

EXAMPLE

Create Post Response

4 fields

EXAMPLE

Security Posture 1

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

Json Placeholder Domain Security

TLSv1.3

SECURITY

Agentic Access 1

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

Json Placeholder Agentic Access

5 operations · 3 acting

5 operations · 3 acting

AGENTIC

Resources

Documentation 1

Reference material describing how the API behaves

Documentation
Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess

Build 2

SDKs, sample code, and the tooling you integrate with

GitHubOrg
GitHubOrg
 GitHubRepository
GitHubRepository

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity

Operate 1

Status, limits, changes, and where to get help

RateLimits
RateLimits

Commercial 3

Pricing, plans, and the legal terms of use

Pricing
Pricing
 Plans
Plans
 FinOps
FinOps

Company 2

The organization behind the API

Website
Website
 Blog
Blog

Other 1

Properties that don't map to a standard resource type

X
X

Source (apis.yml)

apis.yml Raw ↑ 
aid: json-placeholder
name: JSONPlaceholder
description: Free fake REST API for testing and prototyping providing mock data for posts, comments, albums, photos, todos,
  and users without any setup. Handles approximately 3 billion requests per month and supports all standard HTTP methods with
  CORS and JSONP support.
accessModel:
  pricing: free
  onboarding: open
  trial: false
  try_now: true
  public: true
  label: Free · Open access
  confidence: medium
  source:
  - plans
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/json-placeholder.png
url: https://raw.githubusercontent.com/api-evangelist/json-placeholder/refs/heads/main/apis.yml
created: '2026-06-13'
modified: '2026-06-13'
specificationVersion: '0.19'
tags:
- Fake API
- Testing
- Prototyping
- Mock Data
- REST
- Open Source
apis:
- aid: json-placeholder:json-placeholder-posts-api
  name: JSONPlaceholder Posts API
  description: The Posts API from JSONPlaceholder — 2 operation(s) for posts.
  humanURL: https://jsonplaceholder.typicode.com
  baseURL: https://jsonplaceholder.typicode.com
  tags:
  - Posts
  properties:
  - type: OpenAPI
    url: openapi/json-placeholder-posts-api-openapi.yml
  - type: Documentation
    url: https://jsonplaceholder.typicode.com/guide/
common:
- type: AgenticAccess
  url: agentic-access/json-placeholder-agentic-access.yml
- type: DomainSecurity
  url: security/json-placeholder-domain-security.yml
- type: Website
  url: https://jsonplaceholder.typicode.com
- type: Documentation
  url: https://jsonplaceholder.typicode.com/guide/
- type: GitHubOrg
  url: https://github.com/typicode
- type: GitHubRepository
  url: https://github.com/typicode/jsonplaceholder
- type: Blog
  url: https://blog.typicode.com
- type: Pricing
  url: https://jsonplaceholder.typicode.com
- type: X
  url: https://x.com/typicode
- type: Plans
  url: plans/json-placeholder-plans-pricing.yml
- type: RateLimits
  url: rate-limits/json-placeholder-rate-limits.yml
- type: FinOps
  url: finops/json-placeholder-finops.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com