Layer3x is the only MCP-native execution firewall for Claude agents. Connect it as a native tool — no SDK, no integration code required.Documentation Index
Fetch the complete documentation index at: https://docs.layer3x.com/llms.txt
Use this file to discover all available pages before exploring further.
Connect to Claude.ai
Step 1 — Open Claude Settings Go to [claude.ai](https://claude.ai) → Settings → Connectors Step 2 — Add custom connector Click the + button in the top right of the Connectors panel Step 3 — Enter your details- Name: Layer3x
- URL:
https://api.layer3x.com/mcp?apikey=YOUR_AGENT_API_KEY
YOUR_AGENT_API_KEY with the key from your Agents page.
Step 4 — Click Add
Claude will handshake with Layer3x and discover the authorize_payment tool automatically.
What Claude can now do
Once connected, Claude has access to theauthorize_payment tool.
When your agent attempts a payment action, Claude calls Layer3x automatically before executing.
Example:
User: “Release the $6,200 payment to TechVendor Inc”
Claude calls authorize_payment → Layer3x evaluates → Returns ESCALATED
Claude responds: “This payment requires human approval. A request has been logged in your Layer3x dashboard.”
## Tool parameters
action_key (string, required) — The action being requested. Example:payments.release
amount (number, required) — Payment amount in USD.
vendor (string, required) — Destination vendor name.
currency (string, optional) — Currency code. Default: USD.
payload (object, optional) — Additional context for the request.