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Three-layer firewall for MCP: content, egress and action policy. Proxy or server.
Package npm :mcp-output-firewall · website · measurements and detailsLocal MCP proxy: collapses N servers' tools into 4 meta-tools and compresses large tool outputs.
Package npm :context-firewall · website · measurements and detailsInput/output safety for AI agents: known-pattern injection and obfuscation scan, URL/IP, secrets.
Package npm :agent-firewall-mcp · website · measurements and detailsPre-spend firewall for AI agents. Approves, blocks, flags transactions against policy rules.
MCP endpoint :https://sipi.bot/api/mcp · website · measurements and detailsAdvisory policy preflight for AI-agent spend requests; never executes payments or accesses wallets.
MCP endpoint :https://agent-reserve-protocol.super-myna-7255.chatgpt.site/api/mcp · website · measurements and detailsFail-closed action authorization, MCP risk scanning, x402 checks, and signed receipts.
MCP endpoint :https://agentpass-protocol.rmalka06.chatgpt.site/api/mcp · website · measurements and detailsPermission before writes. Gravity→DENYs→Session $0.25. Pilot $100; Gateway $299. Probe free.
MCP endpoint :https://sqlguard.io/mcp · website · measurements and detailsBudget, payment and audit controls for AI agent API calls and MCP tool calls.
MCP endpoint :https://satgate-mcp-saas.fly.dev/sse · website · measurements and detailsToken guard and rate limiter preventing runaway API cost spikes for OpenAI and Anthropic.
MCP endpoint :https://neon_innovation_lab--mcp-rate-limiter.apify.actor/mcp · website · measurements and detailsGoverned OPNsense + pfSense firewall ops: rules, NAT, VPN, DHCP, RCA. 35 tools.
Package pypi :firewall-aiops · website · measurements and detailsMulti-agent LLM security layer detecting prompt injection and jailbreaks.
Package pypi :ai-firewall-mcp · website · measurements and detailsMCP security firewall: stdio wrap proxy or inspection tools; zero runtime dependencies.
Package npm :@aimarket/warden · website · measurements and detailsVerify an agent's output before you pay: JSON Schema checks, signed receipts. Free during launch.
MCP endpoint :https://fastapi-service-5ag4.onrender.com/mcp · website · measurements and detailsHKDF-SHA256 output length, input discarded
MCP endpoint :https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/hkdf-len/mcp · website · measurements and detailsPunycode output length band, host discarded
MCP endpoint :https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/puny-len/mcp · website · measurements and detailsGovern model, retrieval, memory, and tool access for AI applications and agents.
Package pypi :yagami · website · measurements and detailsStructured Output MCP Agent
MCP endpoint :https://structured-output-agent.getvda.ai/mcp · website · measurements and detailsClaude Schema Output Agent
MCP endpoint :https://structured-output-agent-89bcb0.getvda.ai/mcp · website · measurements and detailsStructured Output Agent (Openai)
MCP endpoint :https://structured-output-agent-openai.getvda.ai/mcp · website · measurements and detailsTraced Structured Output Agent (Groq)
MCP endpoint :https://structured-output-agent-c2ddcc.getvda.ai/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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