Forth MCP
Forth MCP is a hosted relay that exposes local, NAT'd, or firewalled MCP servers behind a single secure URL so any MCP-speaking AI client (e.g., Claude, ChatGPT) can call your local tools without port forwarding or VPN.
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Quick Overview
Best for: Developer Tools
What it does
Developer Tools software for decision-makers comparing workflow fit and alternatives.
Best fit
Developer Tools
Pricing snapshot
Freemium from $0
Next step
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Forth MCP
Forth MCP is a hosted relay service that places local, NAT'd, or firewalled MCP servers behind a single secure URL, enabling any MCP-speaking AI client (including Claude and ChatGPT) to access local tools without port forwarding, VPNs, or exposing the host machine. It uses a lightweight connector binary installed as a background service on Windows, macOS, or Linux that authenticates endpoints with a connector token and relays requests through the hosted Forth MCP URL and API token. The product is positioned for production use and agentic workflows, with features for multi-endpoint connectors, per-token tool allowlists, usage dashboards, quotas, and health monitoring.
Forth MCP is a hosted relay that gives Claude, ChatGPT, or any MCP client secure access to your local, NAT'd, or firewalled MCP servers — no port forwarding, no VPN. Install one lightweight connector and go.
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Claim this listing for $29Key Features
Hosted relay with single secure URL
Puts local, NAT'd, or firewalled MCP servers behind one secure Forth MCP URL so clients can reach tools without port forwarding or VPN.
Lightweight connector binary
A single self-contained binary installed as a background service (Windows service, launchd agent, or systemd unit) published from the dashboard.
Multi-endpoint connectors
One connector token can authenticate every local MCP endpoint you add, including npx packages or plain HTTP addresses; endpoints can be added or removed independently.
Per-token tool permissions
Scope each API token to an allowlist of tools so different AI clients or teammates only see authorized tools.
Usage dashboards & quotas
See calls by token and by tool in real time, configure per-plan limits, threshold alerts, and use an instant kill switch.
Live health monitoring
Detect when a connector instance or endpoint drops and re-add deleted endpoints without losing the rest of the connector.
Agent session grace buffer
A grace buffer protects in-progress agent sessions so they are not hard-cut when a quota is hit.
Simple billing and caps
Flat monthly tiers with a hard usage cap to avoid metered billing surprises.
Pricing
Free tier: $0, 1 connector, 500 calls/month, all tools allowed, 7-day audit log retention, kill switch.
Free
$0- 1 connector
- 500 calls / month
- All tools, no filtering
- 7-day audit log retention
Basic
$12/mo- 5 connectors
- 5,000 calls / month
- Per-token tool allowlists
- 14-day audit log retention
Pro
$29/mo- 5 connectors
- 12,000 calls / month
- Per-token tool allowlists
- 30-day audit log retention
Business
$69/mo- Unlimited connectors
- 30,000 calls / month
- Per-token tool allowlists
- 90-day audit log retention
Use Cases
Expose local MCP servers to cloud AI clients
Allow Claude, ChatGPT, or any MCP-speaking client to call locally hosted tools without exposing the host or configuring port forwarding.
Run production fleets of tools
Manage many tool endpoints with multi-endpoint connectors, per-token allowlists, usage dashboards, quotas, and health monitoring for production environments.
Agentic workflows
Support long-running or multi-step agent sessions with a grace buffer to prevent abrupt termination when quotas are reached.
Team and role-based access
Use per-token tool permissions to limit which tools different AI clients or teammates can see and call.
Integrations
Claude
Works with Anthropic Claude as an MCP client to call local MCP endpoints through the relay.
ChatGPT
Works with ChatGPT as an MCP client to call local MCP endpoints through the relay.
Any MCP client
Supports any MCP-speaking client; endpoints can be npx packages or plain HTTP addresses.
Benefits
Limitations
No verified limitations are available.
Frequently Asked Questions
No verified FAQs are available.
Getting Started
- 1 Step 1: Install the connector — one binary, installed as a background service on Windows, macOS, or Linux from your dashboard.
- 2 Step 2: Attach your connector token — use one token to authenticate every local MCP endpoint (npx package or HTTP address).
- 3 Step 3: Call it from anywhere — point any MCP client at your Forth MCP URL and API token to start calling your local tools.
Support
No verified support channels are available.
API
Flat per-plan hard usage caps (e.g., 500/mo free, 5,000/mo Basic, 12,000/mo Pro, 30,000/mo Business) with purchasable extra call blocks.
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