Deterministic pre-flight policy check for AI agent actions, run by a Prolog rule...
https://api.x402ai.dev/api/policy-checkOverview
Deterministic pre-flight policy check for AI agent actions, run by a Prolog rule engine (SWI-Prolog), no LLM. POST JSON {profile: baseline or strict, context: {workdir, home, sandboxed}, actions: 1-20 of read, write, delete, exec, network, pay, self_modify}; returns {policy, results, summary, checked_rules}: one verdict per action (allowed, refused, needs_review) with the rules that decided it. Same input, same output. Checks the actions it is sent; does not enforce them. Typically under 1 s.
Protocol
x402 (POST)
Price
$0.01
Payment Asset
USD Coin
Payment Network
eip155:8453
Category
uncategorized
Provider
x402ai
Source
bazaar
Indexed
2026-11-13 00:08:04
Health
Status
unknown
Latency (p50)
—
Uptime (30d)
—
Reliability Score
—
Last Checked
Never
Last Healthy
Never
Consecutive Failures
0
x402 Payment Validation
Payment Requirements
—
Asset Verified
—
Facilitator
—
Input Schema
{
"body": {
"actions": [
{
"change": "lower",
"control": "sandbox",
"type": "self_modify"
}
],
"context": {
"home": "/home/dev",
"sandboxed": true,
"workdir": "/home/dev/project"
},
"profile": "baseline"
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Output Schema
{
"example": {
"checked_rules": 11,
"policy": "baseline v1.0",
"results": [
{
"action": {
"change": "lower",
"control": "sandbox",
"type": "self_modify"
},
"index": 0,
"notes": [],
"verdict": "refused",
"violations": [
{
"because": [
"self_modify of control sandbox with change lower",
"rule no_self_modify_lowering: no protection (sandbox, network allowlist, hooks, permissions, audit log) is lowered (profile baseline)"
],
"rule": "no_self_modify_lowering"
}
]
}
],
"summary": {
"allowed": 0,
"needs_review": 0,
"refused": 1
}
},
"type": "json"
}