Phoenix Zero — Execution Oracle for L2s runs on your own machine — the client starts it, so there is no endpoint to ping. 83 installs a week from npm. Last commit 5 Nov 2026.
Pre-transaction PASS/FAIL for an L2. Free verdict delayed ~60 s, no revert ratio; live via x402.
We read the source, 4 d ago · rules 995398eba69f
What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.
out = subprocess.check_output(
Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.
We found places where it runs commands, builds paths or queries from values it is given. None of that is a flaw by itself — it becomes one when the code changes, and code changes quietly between releases. We re-read it on every one.
This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.
claude mcp add phoenix-mcp-server -- npx -y phoenix-mcp-server
{
"mcpServers": {
"phoenix-mcp-server": {
"command": "npx",
"args": [
"-y",
"phoenix-mcp-server"
]
}
}
}
[mcp_servers.phoenix-mcp-server]
command = "npx"
args = ["-y", "phoenix-mcp-server"]
{
"mcpServers": {
"phoenix-mcp-server": {
"command": "npx",
"args": [
"-y",
"phoenix-mcp-server"
]
}
}
}
{
"servers": {
"phoenix-mcp-server": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"phoenix-mcp-server"
]
}
}
}
Free read-only Base Mainnet transaction Preflight and Verification; no signing or custody.
Pre-execution governance for AI agents. Deterministic PASS/FAIL/REVIEW verdicts, replayable proof.
Deterministic pre-execution audit for trading agents. PASS/WAIT/FAIL, reproducible verdict_hash.
Pre-transaction token risk checks for autonomous agents on six chains. Read-only; paid via x402.
Pre-execution safety oracle for AI agents. Screens Base contracts, simulates sells, pays via x402.
Verify a Base USDC transaction or x402 settlement landed. Free, no account needed.
Convert PDF bank statements into transactions that arrive with a pass/fail reconciliation verdict.
Pre-execution safety layer for autonomous agent wallets via MCP and x402.
Answers built from our own checks of this server.