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Meaning of HTTP 500.
MCP endpoint :https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/http-500/mcp · website · measurements and detailsCreate and manage your own Certificate Authority for internal HTTPS.
MCP endpoint :https://mcp.certman.app · measurements and detailsDeterministic MCP for statistical classifications and survey codelists with provenance.
MCP endpoint :https://classifications.impactengines.ai/mcp · website · measurements and detailsPhoneInfoga - International Phone Number OSINT
MCP endpoint :https://mcp.apify.com/?tools=anshumanatrey/phoneinfoga-phone-osint · website · measurements and detailsRead-only production error evidence for coding agents investigating failures.
MCP endpoint :https://mcp.volato.dev/mcp · website · measurements and detailsInternational call & VoIP rates: per-minute prices to call 200+ countries, comparison, dialing help.
MCP endpoint :https://efon.com/mcp · website · measurements and detailsRead-only search and discovery for the international llms.txt directory maintained by llmsmap.me.
MCP endpoint :https://llmsmap.me/api/mcp/ · measurements and detailsSourced Art Blocks artist research, holding-duration data, and current agent bounties from AB5D.
MCP endpoint :https://ab5d.xyz/mcp · website · measurements and detailsDelegate from Claude Code to Gemini, Codex, Copilot, Cursor and opencode CLIs as sub-agents.
Package pypi :agent-intern · website · measurements and details{"jsonrpc":"2.0","id":1,"method":"tools/call","params":{"name":"whoami","arguments":{}}} free no key
MCP endpoint :https://www.pathwren.workers.dev/c/mcp-registry-official/mcp/lint · website · measurements and detailsAsk an agent why a PHP site is slow: every request with its SQL, HTTP calls, errors and N+1.
MCP endpoint :https://phpray.dev/mcp · website · measurements and detailsOffline, deterministic cause and fix for Node, npm, Next.js, CORS and Postgres URL errors.
Package npm :dev-error-explainers · website · measurements and detailsMeaning of HTTP 505.
MCP endpoint :https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/http-505/mcp · website · measurements and detailsLocal quantum error correction tools; decoder output verified against H c = s (mod 2).
Package mcpb :https://github.com/GuillaumeLessard/qector-claude-plugin/releases/download/v1.0.6/qector-claude-desktop-1.0.6.mcpb · website · measurements and detailshttp/https scheme check, URL discarded
MCP endpoint :https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/url-scheme-ok/mcp · website · measurements and detailsX-Forwarded-Proto http/https, value discarded
MCP endpoint :https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/xfp-ok/mcp · website · measurements and detailsSearch fresh Indian jobs and internships, plus international intern and new-grad roles.
MCP endpoint :https://www.carrerlift.in/api/mcp · website · measurements and detailsMeaning of HTTP 100.
MCP endpoint :https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/http-100/mcp · website · measurements and detailsMeaning of HTTP 102.
MCP endpoint :https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/http-102/mcp · website · measurements and detailsMeaning of HTTP 200.
MCP endpoint :https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/http-200/mcp · website · measurements and detailsAI agents: all of this is available without keys over MCP https://faceabot.com/api/mcp · HTTP https://faceabot.com/api/catalog?q=… · Guide : llms.txt
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