Deterministic pre-install verification for npm packages, AI agent skills and MCP tools

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x428df107e32E08288fcAC6567f4F40bc4eAB4Da0",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "30000",
    "maxTimeoutSeconds": 60
  }
]

{
  "bazaar": {
    "info": {
      "description": "Deterministic pre-install verification for npm packages, AI agent skills and MCP tools. Matches the exact version against OSV and OpenSSF malicious-package advisories, then runs behavioral analysis for credential theft, exfiltration, obfuscation, prompt injection and install-time droppers, returning a verdict with file-and-line evidence, a SHA-256 of what was analyzed, and a signed attestation that verifies offline. No LLM in the scan path, so the same input yields the same verdict.",
      "input": {
        "body": {
          "depth": "full",
          "target": {
            "ref": "[email protected]",
            "type": "npm_package"
          }
        },
        "bodyType": "json",
        "method": "POST",
        "type": "http"
      },
      "name": "Lazaretto pre-install scan",
      "output": {
        "example": {
          "confidence": "high",
          "risk": "none",
          "target_hash": "sha256:aa57b3ac555f3bfe2357e8a2e7ddfaa77934597887502db9ca0e660d388bf85f",
          "verdict": "clear"
        },
        "type": "json"
      }
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "additionalProperties": false,
          "properties": {
            "body": {
              "properties": {
                "depth": {
                  "enum": [
                    "lookup",
                    "full"
                  ],
                  "type": "string"
                },
                "target": {
                  "properties": {
                    "content": {
                      "type": "string"
                    },
                    "ref": {
                      "type": "string"
                    },
                    "type": {
                      "enum": [
                        "inline",
                        "raw_url",
                        "npm_package",
                        "github_repo",
                        "clawhub_skill"
                      ],
                      "type": "string"
                    }
                  },
                  "required": [
                    "type"
                  ],
                  "type": "object"
                }
              },
              "required": [
                "target"
              ]
            },
            "bodyType": {
              "enum": [
                "json",
                "form-data",
                "text"
              ],
              "type": "string"
            },
            "method": {
              "enum": [
                "POST",
                "PUT",
                "PATCH"
              ],
              "type": "string"
            },
            "type": {
              "const": "http",
              "type": "string"
            }
          },
          "required": [
            "type",
            "method",
            "bodyType",
            "body"
          ],
          "type": "object"
        },
        "output": {
          "properties": {
            "example": {
              "type": "object"
            },
            "type": {
              "type": "string"
            }
          },
          "required": [
            "type"
          ],
          "type": "object"
        }
      },
      "required": [
        "input"
      ],
      "type": "object"
    }
  }
}

curl "https://lazaretto.dev/v1/scan"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

const res = await fetch("https://lazaretto.dev/v1/scan");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

import httpx
res = httpx.get("https://lazaretto.dev/v1/scan")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header