mcp.mariothomas.com — MCP DNS Registry

If you're seeing this page in your browser or this error:

{"jsonrpc":"2.0","error":{"code":-32700,"message":"Parse error"}}

That is expected. This endpoint requires a POST request with a JSON-RPC 2.0 body. A browser visiting the URL directly sends a GET request with no body, which the server correctly rejects. Use the curl commands below to interact with the registry.

DNS Record

Any compliant agent resolves the _mcp TXT record at this domain to discover the registry.

verify the dns record

$ dig TXT _mcp.mariothomas.com +short

v=mcp1 registry=https://mcp.mariothomas.com/registry public=true auth=https://auth.mariothomas.com/token version=2026-02

Registered Servers

articles

Published articles and writing from mariothomas.com

public

locations

Cities visited with corresponding dates

public

documents

Private document catalogue — requires bearer token

authenticated

Query the Registry

Call discover_servers to retrieve all servers visible to the request. Unauthenticated requests return public servers only.

discover public servers

$ curl -X POST https://mcp.mariothomas.com/registry \
-H 'Content-Type: application/json' \
-d '{"jsonrpc":"2.0","id":1,"method":"tools/call","params":{"name":"discover_servers","arguments":{}}}' | jq

list available tools

$ curl -X POST https://mcp.mariothomas.com/registry \
-H 'Content-Type: application/json' \
-d '{"jsonrpc":"2.0","id":1,"method":"tools/list","params":{}}' | jq

DNS Record

Registered Servers

Query the Registry

Further Reading