The real catalog of tools for AI agents

JSONPlaceholder MCP — wraps JSONPlaceholder fake REST API (free, no auth)

Placeholder JSON test data. No key required.

Mock, record/replay, verify and chaos-test any HTTP, REST, gRPC or LLM dependency over MCP.

MCP server for the OpenTofu/Terraform native test framework: scaffold, mock, validate, run tests

Placeholder images from Placehold.co. No key required.

Product mockup API. Render PSD and photo mockups, generate videos, manage async jobs and webhooks.

Test generation, mocks, coverage analysis for AI agents

AI-callable tools for API mocking, testing, monitoring, security, and automation.

JSON tools MCP.

Mock Server Ai MCP Server by MEOK AI Labs

JSON Schema, TypeScript types, mocks for AI agents

Cloudflare Workers MCP server: api-mock-server

MCP server for deterministic mock generation and API contract scaffolding using Zod schemas

Fake, mock and test data generator: CSV, JSON, SQL from a .tdc config, made locally by TDCv2.

AI-native mock API server with MCP. Create REST/SOAP mocks from Claude, Cursor, or Windsurf.

Placeholder image services (DummyImage, Picsum).

Self-hosted gallery for AI-generated mockups. MCP interface; token-efficient curl uploads.

Generate deterministic placeholder image URLs and packs for docs, staging, testing, and AI agents.

Lorem MCP — placeholder text, generated locally.

Mock small-business CRM, inbox, calendar, invoicing and phone tools for testing AI agents safely.