The open authority layer + SDKs for AI-agent payments. Thin Python/TS clients, an MCP server, framework adapters (LangChain/CrewAI/Hermes/OpenClaw/…), and @sardis/reference — a pure policy simulator + AP2/TAP/x402 verifiers showing exactly how Sardis decides if an agent may spend.
Setup
Choose your client, copy the config, then fill in any required environment variables.
claude mcp add sardis --env SARDIS_API_KEY='<SARDIS_API_KEY>' -- npx -y @sardis/mcp-server~/.codex/config.toml
[mcp_servers.sardis]
command = "npx"
args = ["-y", "@sardis/mcp-server"]
env = { SARDIS_API_KEY = "<SARDIS_API_KEY>" }
# codex mcp add sardis --env SARDIS_API_KEY='<SARDIS_API_KEY>' -- npx -y @sardis/mcp-server~/.cursor/mcp.json
{
"mcpServers": {
"sardis": {
"command": "npx",
"args": [
"-y",
"@sardis/mcp-server"
],
"env": {
"SARDIS_API_KEY": "<SARDIS_API_KEY>"
}
}
}
}.vscode/mcp.json
{
"servers": {
"sardis": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"@sardis/mcp-server"
],
"env": {
"SARDIS_API_KEY": "<SARDIS_API_KEY>"
}
}
}
}~/.gemini/settings.json
{
"mcpServers": {
"sardis": {
"command": "npx",
"args": [
"-y",
"@sardis/mcp-server"
],
"env": {
"SARDIS_API_KEY": "<SARDIS_API_KEY>"
}
}
}
}claude_desktop_config.json
{
"mcpServers": {
"sardis": {
"command": "npx",
"args": [
"-y",
"@sardis/mcp-server"
],
"env": {
"SARDIS_API_KEY": "<SARDIS_API_KEY>"
}
}
}
}.trae/mcp.json
{
"mcpServers": {
"sardis": {
"command": "npx",
"args": [
"-y",
"@sardis/mcp-server"
],
"env": {
"SARDIS_API_KEY": "<SARDIS_API_KEY>"
}
}
}
}Environment variables
SARDIS_API_KEY
Replace the placeholders with your own credentials and keep them out of version control.