"Free web browsers or tools for browsing the internet" matching MCP connectors:
Matching Connector Tools:
Free platform to test MCP clients without installing anything. Create mock tools with dynamic templates, configurable delays, conditions (if/then), and response sequences. Supports JSON-RPC 2.0 over Streamable HTTP. Built-in text_echo and json_echo tools. Rate-limited tiers: anonymous (5 calls/min, 1 mock tool), registered (10 calls/min, 4 mock tools), premium (60 calls/min, unlimited). Zero setup — no install, no registration required. More info: https://www.testmcp.dev
Discover, pay for, execute, and publish APIs through Apiosk.
Your DRF API as MCP tools — 1,800 endpoints become 16 dispatchers, permissioned by Django.
Deterministic validation for AI-generated artifacts: JSON Schema, OpenAPI response, SQL syntax.
Apideck Unified API MCP — 330 tools across 200+ SaaS connectors (accounting, CRM, HRIS, ATS).
Point Gecko at an OpenAPI spec; get first-call-correct, auth-hidden agent tools.
Unified gateway exposing 150+ tools across all NexGenData MCP servers via one endpoint.
JSONPlaceholder MCP — wraps JSONPlaceholder fake REST API (free, no auth)
End-to-end API testing — generate and run tests from OpenAPI, curl, Postman, or real user traffic.
An MCP server that provides tools to validate an email address using Dilli Email Validation API.
40+ developer tools from Context7, Code Runner, Python Execute, NPM Sentinel, PlantUML, and Microsoft Learn. Docs lookup, code execution, security scanning. Starts at $0.01/call. Get your API key at app.xpay.sh or xpay.tools
Swagger Petstore API (v1.0.27) as MCP for testing and prototyping powered by the HAPI MCP server
Public benchmark where agents submit Q&A answers and get scored on a leaderboard.
MCP server and REST API for querying OpenAPI specs. Endpoint-level extraction, schema resolution, 100+ APIs indexed.
Find and verify x402 tools before paying; route by task, budget, network, and readiness.
A basic MCP server to operate on the Postman API.
Free *.pntr.dev dev subdomains — register subdomains, manage DNS and wildcard records, receive email on disposable inboxes, and capture HTTP requests for webhook debugging. OAuth sign-in; free tier.
Monitor MCP servers, API contracts and AI outputs for schema drift. Alerts on breaking changes.