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URL Status

url_status
Read-only

Health check for any public URL: HTTP status, full redirect chain, response time, content type, SSL certificate validity/expiry/issuer and a security-header audit (HSTS, CSP, X-Frame-Options, …) with score. SSRF-guarded (private/internal targets are rejected). Pay per call with USDC or USDT on Base via x402. 3 free calls per wallet.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
urlYesPublic http(s) URL to probe.
walletNoYour EVM wallet address (0x...). Unlocks the free tier (3 free calls per wallet).
api_keyNoOptional AMR enterprise API key.
x_paymentNoOptional signed x402 payment payload (base64 JSON) for USDC/USDT on Base.

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
okYes
sslYes
urlYes
errorNo
tokenNoToken actually used for payment (USDC, USDT or FREE).USDC
serverNo
routingYesHow the request was routed (provider, fallback, cache, latency).
cost_usdcYesPrice charged in stablecoin units (USDC/USDT 1:1); 0 on the free tier.
final_urlYes
reachableYes
fetched_atNoUTC timestamp when the data was fetched.
method_usedYes
status_codeNo
content_typeNo
content_lengthNo
redirect_chainYes
redirect_countYes
security_scoreYes
response_time_msYes
security_headersYes
freshness_secondsYesAge of the underlying data in seconds (0 = fetched live).
x_payment_responseNoBase64-encoded x402 settlement receipt (mirrors the X-PAYMENT-RESPONSE header). Only present when the call was paid with `x_payment`.
missing_security_headersYes

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed1 schema field changed
    • changedOutput schema / (root)
      Previous value: -nullNew value: +{
      +  "description": "Response for ``POST /url-status``.",
      +  "properties": {
      +    "content_length": {
      +      "anyOf": [
      +        {
      +          "type": "integer"
      +        },
      +        {
      +          "type": "null"
      +        }
      +      ],
      +      "default": null,
      +      "title": "Content Length"
      +    },
      +    "content_type": {
      +      "anyOf": [
      +        {
      +          "type": "string"
      +        },
      +        {
      +          "type": "null"
      +        }
      +      ],
      +      "default": null,
      +      "title": "Content Type"
      +    },
      +    "cost_usdc": {
      +      "description": "Price charged in stablecoin units (USDC/USDT 1:1); 0 on the free tier.",
      +      "title": "Cost Usdc",
      +      "type": "number"
      +    },
      +    "error": {
      +      "anyOf": [
      +        {
      +          "type": "string"
      +        },
      +        {
      +          "type": "null"
      +        }
      +      ],
      +      "default": null,
      +      "title": "Error"
      +    },
      +    "fetched_at": {
      +      "description": "UTC timestamp when the data was fetched.",
      +      "format": "date-time",
      +      "title": "Fetched At",
      +      "type": "string"
      +    },
      +    "final_url": {
      +      "title": "Final Url",
      +      "type": "string"
      +    },
      +    "freshness_seconds": {
      +      "description": "Age of the underlying data in seconds (0 = fetched live).",
      +      "title": "Freshness Seconds",
      +      "type": "integer"
      +    },
      +    "method_used": {
      +      "title": "Method Used",
      +      "type": "string"
      +    },
      +    "missing_security_headers": {
      +      "items": {
      +        "type": "string"
      +      },
      +      "title": "Missing Security Headers",
      +      "type": "array"
      +    },
      +    "ok": {
      +      "title": "Ok",
      +      "type": "boolean"
      +    },
      +    "reachable": {
      +      "title": "Reachable",
      +      "type": "boolean"
      +    },
      +    "redirect_chain": {
      +      "items": {
      +        "properties": {
      +          "location": {
      +            "anyOf": [
      +              {
      +                "type": "string"
      +              },
      +              {
      +                "type": "null"
      +              }
      +            ],
      +            "default": null,
      +            "title": "Location"
      +          },
      +          "status_code": {
      +            "title": "Status Code",
      +            "type": "integer"
      +          },
      +          "url": {
      +            "title": "Url",
      +            "type": "string"
      +          }
      +        },
      +        "required": [
      +          "url",
      +          "status_code"
      +        ],
      +        "title": "RedirectHop",
      +        "type": "object"
      +      },
      +      "title": "Redirect Chain",
      +      "type": "array"
      +    },
      +    "redirect_count": {
      +      "title": "Redirect Count",
      +      "type": "integer"
      +    },
      +    "response_time_ms": {
      +      "title": "Response Time Ms",
      +      "type": "integer"
      +    },
      +    "routing": {
      +      "description": "How the request was routed (provider, fallback, cache, latency).",
      +      "properties": {
      +        "cache_hit": {
      +          "default": false,
      +          "description": "True if the result was served from cache.",
      +          "title": "Cache Hit",
      +          "type": "boolean"
      +        },
      +        "fallback_used": {
      +          "default": false,
      +          "description": "True if the primary provider failed and a fallback served the result.",
      +          "title": "Fallback Used",
      +          "type": "boolean"
      +        },
      +        "latency_ms": {
      +          "default": 0,
      +          "description": "End-to-end routing latency in milliseconds.",
      +          "title": "Latency Ms",
      +          "type": "integer"
      +        },
      +        "provider": {
      +          "description": "Name of the upstream provider that served the result.",
      +          "title": "Provider",
      +          "type": "string"
      +        },
      +        "providers_tried": {
      +          "description": "Providers attempted, in order.",
      +          "items": {
      +            "type": "string"
      +          },
      +          "title": "Providers Tried",
      +          "type": "array"
      +        }
      +      },
      +      "required": [
      +        "provider"
      +      ],
      +      "title": "RoutingMeta",
      +      "type": "object"
      +    },
      +    "security_headers": {
      +      "additionalProperties": {
      +        "anyOf": [
      +          {
      +            "type": "string"
      +          },
      +          {
      +            "type": "null"
      +          }
      +        ]
      +      },
      +      "title": "Security Headers",
      +      "type": "object"
      +    },
      +    "security_score": {
      +      "title": "Security Score",
      +      "type": "integer"
      +    },
      +    "server": {
      +      "anyOf": [
      +        {
      +          "type": "string"
      +        },
      +        {
      +          "type": "null"
      +        }
      +      ],
      +      "default": null,
      +      "title": "Server"
      +    },
      +    "ssl": {
      +      "properties": {
      +        "checked": {
      +          "title": "Checked",
      +          "type": "boolean"
      +        },
      +        "days_until_expiry": {
      +          "anyOf": [
      +            {
      +              "type": "integer"
      +            },
      +            {
      +              "type": "null"
      +            }
      +          ],
      +          "default": null,
      +          "title": "Days Until Expiry"
      +        },
      +        "error": {
      +          "anyOf": [
      +            {
      +              "type": "string"
      +            },
      +            {
      +              "type": "null"
      +            }
      +          ],
      +          "default": null,
      +          "title": "Error"
      +        },
      +        "expires_at": {
      +          "anyOf": [
      +            {
      +              "type": "string"
      +            },
      +            {
      +              "type": "null"
      +            }
      +          ],
      +          "default": null,
      +          "title": "Expires At"
      +        },
      +        "issuer": {
      +          "anyOf": [
      +            {
      +              "type": "string"
      +            },
      +            {
      +              "type": "null"
      +            }
      +          ],
      +          "default": null,
      +          "title": "Issuer"
      +        },
      +        "subject": {
      +          "anyOf": [
      +            {
      +              "type": "string"
      +            },
      +            {
      +              "type": "null"
      +            }
      +          ],
      +          "default": null,
      +          "title": "Subject"
      +        },
      +        "valid": {
      +          "anyOf": [
      +            {
      +              "type": "boolean"
      +            },
      +            {
      +              "type": "null"
      +            }
      +          ],
      +          "default": null,
      +          "title": "Valid"
      +        }
      +      },
      +      "required": [
      +        "checked"
      +      ],
      +      "title": "SslInfo",
      +      "type": "object"
      +    },
      +    "status_code": {
      +      "anyOf": [
      +        {
      +          "type": "integer"
      +        },
      +        {
      +          "type": "null"
      +        }
      +      ],
      +      "default": null,
      +      "title": "Status Code"
      +    },
      +    "token": {
      +      "default": "USDC",
      +      "description": "Token actually used for payment (USDC, USDT or FREE).",
      +      "title": "Token",
      +      "type": "string"
      +    },
      +    "url": {
      +      "title": "Url",
      +      "type": "string"
      +    },
      +    "x_payment_response": {
      +      "description": "Base64-encoded x402 settlement receipt (mirrors the X-PAYMENT-RESPONSE header). Only present when the call was paid with `x_payment`.",
      +      "type": "string"
      +    }
      +  },
      +  "required": [
      +    "freshness_seconds",
      +    "cost_usdc",
      +    "routing",
      +    "url",
      +    "final_url",
      +    "reachable",
      +    "ok",
      +    "method_used",
      +    "response_time_ms",
      +    "redirect_count",
      +    "redirect_chain",
      +    "ssl",
      +    "security_headers",
      +    "security_score",
      +    "missing_security_headers"
      +  ],
      +  "type": "object"
      +}
  2. Changed1 schema field changed
    • changedInput schema / properties / wallet / description
      Previous value: -"Your EVM wallet address (0x...). Unlocks the free tier (3 calls per wallet)."New value: +"Your EVM wallet address (0x...). Unlocks the free tier (3 free calls per wallet)."
  3. Added

TDQS

A4/5.0
Behavior4/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already signal readOnlyHint and openWorldHint, and the description adds valuable non-obvious behavior: SSRF guarding, public-only targeting, and payment/free-tier behavior. It does not need to restate the annotation-level safety profile, and nothing in the description contradicts the annotations.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is compact and front-loaded: purpose and main outputs first, followed by critical security behavior and payment mechanics. Every part carries useful and specific information; there is no filler or redundant restatement.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given a present output schema, the description need not explain return values, but it covers scope, SSRF behavior, and payment/free-tier constraints relevant to calling correctly. It is complete enough for a payment-gated probe tool, leaving only minor gaps such as explicit alternative routing to sibling tools.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100%, so the structured fields already document each parameter. The description adds a bit of semantic color by explaining x402 payment and the 3-free-calls-per-wallet rule, but it does not significantly deepen meaning beyond the schema.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description names a specific action ('health check') and a distinct resource (any public URL), enumerating concrete data points (HTTP status, redirect chain, response time, SSL, security headers). It does not explicitly contrast sibling tools such as seo_check or web_crawl, so it loses the top mark on sibling differentiation.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines4/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description clearly scopes when the tool is appropriate: any public URL, and it explicitly warns that private/internal targets are rejected via SSRF guarding. It does not explicitly reference alternative tools, but the target domain and rejection rule provide clear enough context for an agent to select it correctly.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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