58 tools. 11 can modify or destroy data without limits.
5 destructive tools with no built-in limits. Policy required.
Last updated:
Community server · catalogue entry checked 14/07/2026 · full schemas captured for 52 of 58 tools
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11 of X402 Middleware's 58 tools can modify, destroy, or commit something on every call — and an agent calls them with no built-in limits.
PolicyLayer is an MCP gateway — it sits between your AI agents and X402 Middleware, and nothing reaches the server without passing your rules. These are the rules we recommend:
{
"wallet_buy": {
"deny_if": [
{
"conditions": [],
"on_deny": "Requires human approval."
}
]
}
} Financial tools should be explicitly enabled per use case, not open by default.
{
"agent_memory": {
"deny_if": [
{
"conditions": [],
"on_deny": "Blocked by default. Requires approval."
}
]
}
} Destructive tools should never be available to autonomous agents without human approval.
{
"chat_completion": {
"limits": [
{
"counter": "chat_completion_per_hour",
"window": "hour",
"max": 30,
"scope": "grant"
}
]
}
} Prevents bulk unintended modifications from agents caught in loops.
{
"analyze_readability": {
"limits": [
{
"counter": "analyze_readability_per_minute",
"window": "minute",
"max": 60,
"scope": "grant"
}
]
}
} Controls API costs and prevents retry loops from exhausting upstream rate limits.
Instant setup, no code required.
Other MCP servers with similar tools — same risk classification, starter policies for each.
Yes. The X402 Middleware server exposes 4 financial tools including wallet_buy, x402_payment_request, x402_pricing. Without a policy, an autonomous agent can call these with no spend caps, no rate limits, and no approval flow. PolicyLayer lets you block financial tools by default, require human approval, or set per-tool rate limits — enforced on every call.
Yes. The X402 Middleware server exposes 1 destructive tools including agent_memory. These permanently remove resources with no undo. PolicyLayer blocks destructive tools by default so they never reach the upstream server.
The X402 Middleware server has 6 write tools including chat_completion, convert_csv_to_json, convert_json_to_csv. Set a rate limit in your policy -- for example, 10 calls per hour prevents an agent from making more than 10 modifications per hour. PolicyLayer enforces this at the gateway, before calls reach X402 Middleware.
58 tools across 4 categories: Destructive, Execute, Read, Write. 47 are read-only. 11 can modify, create, or delete data.
Register the X402 Middleware MCP server in PolicyLayer, apply the suggested rules above (adjust the limits to your use case), and point your AI client at the PolicyLayer proxy URL instead of the server directly. Your agents keep the same tools; PolicyLayer evaluates every call against policy before it executes. Nothing to install, live in minutes.
Deterministic rules across all 58 X402 Middleware tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Instant setup, no code required.
58 X402 Middleware tools catalogued and risk-classified — across an index of 46,500+ MCP servers.
These policies come from X402 Middleware's registry record.
The record behind this page: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
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