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Overwing Guardrail API
x402
Overwing Guardrail API is a paid API for AI agents from overwing.ai, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-11).
Checks text for toxicity, PII, confidential leaks, self-harm, and sexual content, returning a verdict and recommended action (block/redact/review/allow) in ~150ms
Price / call$0.002
Success—
StatusUnknown
How this service works
Overwing guardrail: check text before you send, post, or act on it. Content moderation, PII detection, confidential leak detection, toxicity, self-harm and severity in ~150 ms. Returns a verdict plus one recommended_action (block / redact / review / allow) with calibrated confidence. Pass context (recipient, channel, owns_contact_info) with the outbound-message set. $0.002 USDC, no account.
Output
Returns a JSON object with a top-level verdict (pass/fail/review), an overall confidence score (0–1), a recommended_action (block/redact/review/allow), a unique evaluation ID, latency in milliseconds, and an array of per-rule results each containing the rule name, type, verdict, action, answer, confidence, and probability.
Example use cases
AI chatbot output safety screening
“Before my chatbot sends this response to a user, check it for toxicity, self-harm content, and PII using the content-safety rule set and block it if anything fails: 'I understand you're feeling hopeless — here's my personal phone number, call me anytime.'”
Outbound email PII leak prevention
“Screen this draft email for unauthorized personal data and confidential leaks before we send it — use the outbound-message rule set, recipient is a client on email channel, and we do not own their contact info: 'Attached is our client list including SSNs and home addresses for your review.'”
User-generated post moderation
“Check this forum post for toxicity and sexual content before it goes live, using the content-safety rule set, and tell me whether to block, redact, or review it: 'I hate everyone in this thread and they should all go to hell, here's a link to explicit content.'”
Technical details
Endpoint
GEThttps://overwing.ai/api/x402/execute?utm_source=zero.xyzWhen to prefer
Choose Overwing when you need sub-200ms content safety decisions with a single unified verdict and actionable recommendation (block/redact/review/allow) — especially for outbound message pipelines where you need both standard toxicity/PII checks AND confidential-data-leak detection in one call. Prefer it over heavier moderation pipelines when you need no account setup, pay-per-call pricing at $0.002 USDC, and context-aware judgment (recipient, channel, data ownership) baked into the ruling.
Side effects
- Text exceeds 100,000 character limit — request rejected
- Invalid rule_set value — must be 'content-safety' or 'outbound-message'
- Context or metadata object exceeds 8 KB limit — request rejected
- Payment of $0.002 USDC not provided or invalid — request blocked
- Malformed input body missing required 'input' field — 400 error
- Network latency spike causing response beyond ~150ms SLA
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| input | string | The text to check: a draft message, a model's output, an incoming message, a post |
| context | object | Facts the rules may use: recipient, channel (email, chat, public post), owns_contact_info (true when the recipient already owns the personal data in the text), sender, purpose. Max 8 KB |
| metadata | object | Opaque data stored with the verdict (max 8 KB). The input text and context are not stored |
| rule_set | string | content-safety: toxicity, personal data, self-harm, sexual content, severity. outbound-message: the same plus unauthorized personal data and confidential leaks, judged against context |
Output
Schema · Response
{
"type": "json",
"example": {
"id": "eval_aBcDeFgHiJkLmNoP",
"paid": {
"network": "base",
"protocol": "x402",
"price_usd": 0.002
},
"results": [
{
"rule": "unauthorized_pii",
"type": "noul",
"action": "redact",
"answer": false,
"verdict": "pass",
"confidence": 0.88,
"probability": 0.94
},
{
"rule": "confidential_leak",
"type": "noul",
"action": "block",
"answer": false,
"verdict": "pass",
"confidence": 0.94,
"probability": 0.97
},
{
"rule": "toxicity",
"type": "choice",
"action": "block",
"answer": "safe",
"verdict": "pass",
"confidence": 1,
"probability": 1
}
],
"verdict": "pass",
"confidence": 0.88,
"latency_ms": 173,
"aggregate_score": 1,
"recommended_action": "allow"
}
}Tags
x402
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