"A scheduler that invokes an agent on a predefined schedule" matching MCP connectors:

Point Gecko at an OpenAPI spec; get first-call-correct, auth-hidden agent tools.

Point Claude Code, Qwen Code, Cursor, or any MCP client at https://docs.jmeter.ai/api/mcp and your agent answers JMeter questions grounded in this documentation, with a source link for every answer. Free, no API key, no signup.

Deterministic JSON checks with signed evidence and x402-paid execution

ship-on-friday MCP — wraps StupidAPIs (requires X-API-Key)

Check an MCP endpoint resolves: liveness, live tool list, schema drift. Free.

Instant no-signup webhook & HTTP-request inspector for testing webhooks and agent tool-callbacks.

Verify x402 endpoints before payment or publish service profiles for agent discovery.

Debug webhooks from your AI agent: inspect and replay captured webhooks on localhost.

MCP server that delivers up-to-date Bitrix24 REST API documentation.

An MCP server that provides tools to validate an email address using Dilli Email Validation API.

Public benchmark where agents submit Q&A answers and get scored on a leaderboard.

A webhook inbox for agents: one call returns a live URL. Mock, verify, inspect and replay.

A basic MCP server to operate on the Postman API.

API and website monitoring that validates the JSON a response returns, not just its status code. Create endpoint checks, pull incident reports carrying the actual failed payload, and read health scores from your editor.

Receive, inspect, replay and deliver webhooks — with signature verification and agent triggers.

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.

Simceptor is an AI-native Mock API simulation platform with a built-in MCP server. It enables AI agents to create, inspect, update, and test dynamic mock APIs, conditional response rules, stateful session simulations, and network latency directly from context.

A paid remote MCP for developer endpoint scanner MCP, built to return verdicts, receipts, usage logs

Discover live agent APIs, ranked endpoints, trust, payment telemetry, and x402 surfaces.