Monitoring · x402 · early usage

Overwing guardrail: check text before you send, post, or act on it

Name: Overwing guardrail: check text before you send, post, or act on it
Price: 0.002 USD
Availability: InStock

by overwing.ai · discovered, not yet claimed by its owner · updated 2026-10-10

30d calls2

30d payers2

MethodPOST

Outputjson

Mirrored from Coinbase's public x402 Bazaar. The description is the provider's own text and has not been reviewed here; the payment requirements are copied as published.

What it does

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.

Tags: pii · moderation · toxicity · guardrails · dlp · bazaar

Call contract

Method: POST
Input: json
Output: json
Last paid call: 2026-10-10

Input example from Bazaar metadata

{
  "context": {
    "channel": "email",
    "owns_contact_info": true,
    "recipient": "the refunds desk already in this email thread"
  },
  "input": "Reach me at [email protected] or 555-0142 to sort out the refund.",
  "rule_set": "outbound-message"
}

Output example

{
  "aggregate_score": 1,
  "confidence": 0.88,
  "id": "eval_aBcDeFgHiJkLmNoP",
  "latency_ms": 173,
  "paid": {
    "network": "base",
    "price_usd": 0.002,
    "protocol": "x402"
  },
  "recommended_action": "allow",
  "results": [
    {
      "action": "redact",
      "answer": false,
      "confidence": 0.88,
      "probability": 0.94,
      "rule": "unauthorized_pii",
      "type": "noul",
      "verdict": "pass"
    },
    {
      "action": "block",
      "answer": false,
      "confidence": 0.94,
      "probability": 0.97,
      "rule": "confidential_leak",
      "type": "noul",
      "verdict": "pass"
    },
    {
      "action": "block",
      "answer": "safe",
      "confidence": 1,
      "probability": 1,
      "rule": "toxicity",
      "type": "choice",
      "verdict": "pass"
    }
  ],
  "verdict": "pass"
}

Use with an agent

Discover. Agents find this listing with GET https://bazaar.saylorinnovations.com/discovery/search?query=…, the MCP tool search_resources, or /discovery/resources.
Inspect. Fetch /resources/36400.json for the price and payment options.
Pay. Call GET https://overwing.ai/api/x402/execute. The provider answers 402 with its payment requirements. An x402 client signs one of the options below and retries with PAYMENT-SIGNATURE.
Execute. The provider returns 200 with the data. Agent Bazaar is not in the request path and never sees your payment.

For humans

You don't need an account or an API key; you need a wallet holding a small amount of USDC on Base, and an x402-capable client (see the examples below). Call the endpoint unpaid first to see exactly what it asks for.

Pricing & payment

Price: $0.002 / request
Protocol: x402 v2
Auth: No account or API key. Pay per request.
Networks: Base
Demand: 2 calls · 2 unique payers in 30d (public x402 Bazaar data)

x402 payment requirements

Scheme	Network	Asset	Amount	Pay to	Timeout
exact	Base eip155:8453	USDC	$0.002	0xF4A6CEa7CE19CE36D6420905E5a1EAFb30Bfd133	60s

accepts[] (raw JSON)

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0xF4A6CEa7CE19CE36D6420905E5a1EAFb30Bfd133",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "2000",
    "amountUsd": 0.002,
    "maxTimeoutSeconds": 60
  }
]

Schemas

Output schema (JSON Schema)

{
  "properties": {
    "example": {
      "properties": {
        "aggregate_score": {
          "description": "0 to 1, weighted across rules",
          "type": "number"
        },
        "confidence": {
          "description": "Minimum confidence across rules, 0 to 1",
          "type": "number"
        },
        "id": {
          "type": "string"
        },
        "latency_ms": {
          "type": "integer"
        },
        "recommended_action": {
          "description": "The one field to branch on. block: do not send. redact: remove the flagged content and check again. review: ask a human. allow: proceed",
          "enum": [
            "block",
            "redact",
            "review",
            "allow"
          ],
          "type": "string"
        },
        "results": {
          "items": {
            "properties": {
              "action": {
                "description": "What this rule asks for when it fails",
                "enum": [
                  "block",
                  "redact",
                  "review"
                ],
                "type": "string"
              },
              "answer": {},
              "confidence": {
                "type": "number"
              },
              "probability": {
                "type": "number"
              },
              "rule": {
                "type": "string"
              },
              "type": {
                "enum": [
                  "choice",
                  "score",
                  "noul"
                ],
                "type": "string"
              },
              "verdict": {
                "enum": [
                  "pass",
                  "fail",
                  "review"
                ],
                "type": "string"
              }
            },
            "type": "object"
          },
          "type": "array"
        },
        "verdict": {
          "description": "fail: a rule matched. review: a rule was unsure. pass: neither",
          "enum": [
            "pass",
            "fail",
            "review"
          ],
          "type": "string"
        }
      },
      "type": "object"
    },
    "type": {
      "type": "string"
    }
  },
  "required": [
    "type"
  ],
  "type": "object"
}

Example shape — generated from the schema, not a captured live response

{
  "example": {
    "aggregate_score": 0,
    "confidence": 0,
    "id": "string",
    "latency_ms": 0,
    "recommended_action": "block",
    "results": [
      {
        "action": "block",
        "answer": null,
        "confidence": 0,
        "probability": 0,
        "rule": "string",
        "type": "choice",
        "verdict": "pass"
      }
    ],
    "verdict": "pass"
  },
  "type": "string"
}

Examples

curl

curl "https://overwing.ai/api/x402/execute"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

JavaScript

const res = await fetch("https://overwing.ai/api/x402/execute");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

Python

import httpx
res = httpx.get("https://overwing.ai/api/x402/execute")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header

Details

Provider: overwing.ai
Endpoint: https://overwing.ai/api/x402/execute
Machine-readable: /resources/36400.json