Payment firewall for AI agents: a signed, independently-verifiable verdict on every money-moving action. Non-custodial, local-first. npx @fidacy/mcp
Setup
Choose your client, copy the config, then fill in any required environment variables.
claude mcp add ai-agent-firewall --env FIDACY_ENGINE_API_KEY='<FIDACY_ENGINE_API_KEY>' -- npx -y @fidacy/mcp~/.codex/config.toml
[mcp_servers.ai-agent-firewall]
command = "npx"
args = ["-y", "@fidacy/mcp"]
env = { FIDACY_ENGINE_API_KEY = "<FIDACY_ENGINE_API_KEY>" }
# codex mcp add ai-agent-firewall --env FIDACY_ENGINE_API_KEY='<FIDACY_ENGINE_API_KEY>' -- npx -y @fidacy/mcp~/.cursor/mcp.json
{
"mcpServers": {
"ai-agent-firewall": {
"command": "npx",
"args": [
"-y",
"@fidacy/mcp"
],
"env": {
"FIDACY_ENGINE_API_KEY": "<FIDACY_ENGINE_API_KEY>"
}
}
}
}.vscode/mcp.json
{
"servers": {
"ai-agent-firewall": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"@fidacy/mcp"
],
"env": {
"FIDACY_ENGINE_API_KEY": "<FIDACY_ENGINE_API_KEY>"
}
}
}
}~/.gemini/settings.json
{
"mcpServers": {
"ai-agent-firewall": {
"command": "npx",
"args": [
"-y",
"@fidacy/mcp"
],
"env": {
"FIDACY_ENGINE_API_KEY": "<FIDACY_ENGINE_API_KEY>"
}
}
}
}claude_desktop_config.json
{
"mcpServers": {
"ai-agent-firewall": {
"command": "npx",
"args": [
"-y",
"@fidacy/mcp"
],
"env": {
"FIDACY_ENGINE_API_KEY": "<FIDACY_ENGINE_API_KEY>"
}
}
}
}.trae/mcp.json
{
"mcpServers": {
"ai-agent-firewall": {
"command": "npx",
"args": [
"-y",
"@fidacy/mcp"
],
"env": {
"FIDACY_ENGINE_API_KEY": "<FIDACY_ENGINE_API_KEY>"
}
}
}
}Environment variables
FIDACY_ENGINE_API_KEY
Replace the placeholders with your own credentials and keep them out of version control.