"Tools for optimizing prompts" 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
Point Gecko at an OpenAPI spec; get first-call-correct, auth-hidden agent tools.
Deterministic validation for AI-generated artifacts: JSON Schema, OpenAPI response, SQL syntax.
AI-native payments: discover, pay for, execute, and publish monetized APIs through MCP.
Apideck Unified API MCP — 330 tools across 200+ SaaS connectors (accounting, CRM, HRIS, ATS).
Unified gateway exposing 150+ tools across all NexGenData MCP servers via one endpoint.
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
Find and verify x402 tools before paying; route by task, budget, network, and readiness.
MCP server and REST API for querying OpenAPI specs. Endpoint-level extraction, schema resolution, 100+ APIs indexed.
Monitor MCP servers, API contracts and AI outputs for schema drift. Alerts on breaking changes.
327 tools, 92 providers. Pay per call via x402 + MPP. One MCP endpoint.
API governance for AI agents. Detects breaking changes, scores blast radius, blocks unsafe calls.
A paid remote MCP for developer endpoint scanner MCP, built to return verdicts, receipts, usage logs
HttpStatus MCP Server — 24 AI-callable tools for API testing, mocking, monitoring, and security. Create and manage API mocks, run chaos engineering rules, validate OpenAPI specs, scan URLs for security issues, check SSL certificates, debug CORS, analyze redirect chains, decode JWTs, inspect HAR files, trace distributed requests, capture webhooks, build automation workflows (including Postman import), and set up uptime monitors — all from your AI assistant.
AI-callable tools for API mocking, testing, monitoring, security, and automation.
Remote MCP for 1,500+ APIs. Vault-managed credentials; OAuth or API key. Search, load, and execute.
Gibs is a multi-regulation compliance API for developers building applications that need to reason about EU regulations. Classify AI systems under the EU AI Act, ask compliance questions about GDPR and DORA, and get source-cited answers with article-level traceability — all in one API call.
The Grafbase MCP server sits in front of a GraphQL API and exposes an MCP protocol-compliant interface that allows AI agents and LLMs to explore and query GraphQL APIs using natural language. It provides tools to search schemas, introspect types and fields, and execute GraphQL queries while minimizing context bloat by returning only relevant schema subsets, with built-in support for authentication, authorization, and configurable access control.