A deterministic, model-free verification engine — and an MCP for agents (five doors: Check · Find · Walk · Word · Keep). Bring a claim; get a verdict, the worked trail, and a re-checkable seal. 77 verifier domains, 880k+ cards, 0 false positives, sovereign + offline.
Setup
Choose your client, copy the config, then fill in any required environment variables.
claude mcp add --transport http concordance https://narrowhighway.com/mcp~/.codex/config.toml
[mcp_servers.concordance]
url = "https://narrowhighway.com/mcp"
# codex mcp add concordance --url https://narrowhighway.com/mcp~/.cursor/mcp.json
{
"mcpServers": {
"concordance": {
"url": "https://narrowhighway.com/mcp"
}
}
}.vscode/mcp.json
{
"servers": {
"concordance": {
"type": "http",
"url": "https://narrowhighway.com/mcp"
}
}
}~/.gemini/settings.json
{
"mcpServers": {
"concordance": {
"httpUrl": "https://narrowhighway.com/mcp"
}
}
}claude_desktop_config.json · Customize › Connectors › Add custom connector
{
"mcpServers": {
"concordance": {
"command": "npx",
"args": [
"-y",
"mcp-remote",
"https://narrowhighway.com/mcp"
]
}
}
}.trae/mcp.json
{
"mcpServers": {
"concordance": {
"url": "https://narrowhighway.com/mcp"
}
}
}