"A tool for sharing files, task lists, and a kanban board" matching MCP connectors:

Conformance checker for MCP servers. Free, no key, verdicts recomputable and re-measured daily.

Detect breaking changes, generate changelogs, diff, and validate OpenAPI specs.

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

Regex matching, email/URL format validation, and JSON Schema validation.

Search millions of x402 APIs for data, finance, validation, security, inventory, sync and automation

Validate OpenRTB bid requests and responses against IAB specs. ARTF, Rust core.

MCP tool observatory: do registry servers answer, and are their answers true? No key.

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

Deterministic JSON checks with signed evidence and x402-paid execution

Discover, pay for, execute, and publish APIs through Apiosk.

Deploy production REST APIs from JSON schemas in seconds. Manage projects, schemas, and deployments.

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

Anonymous webhook capture, inspection, waiting, and response configuration for AI agents.

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.

Deterministic validation for AI-generated artifacts: JSON Schema, OpenAPI response, SQL syntax.

Keyless webhook endpoints: capture, wait, replay, forward, and generate types from real traffic.

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

API governance for AI agents. Detects breaking changes, scores blast radius, blocks unsafe calls.

End-to-end API testing — generate and run tests from OpenAPI, curl, Postman, or real user traffic.