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SEO Check

seo_check
Read-only

On-page SEO audit of any URL: title, meta description, canonical, headings, images without alt, links, Open Graph, structured data, robots.txt/sitemap, prioritized issues and a 0-100 score with grade. Pay per call with USDC or USDT on Base via x402. 3 free calls per wallet.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
urlYesPage URL to audit.
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.
check_robotsNoProbe robots.txt + sitemap (default true).

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
h1Yes
urlYes
langNo
gradeYes
httpsYes
linksYes
scoreYes
titleNo
tokenNoToken actually used for payment (USDC, USDT or FREE).USDC
imagesYes
issuesYes
load_msYes
routingYesHow the request was routed (provider, fallback, cache, latency).
sitemapNo
h2_countYes
viewportNo
canonicalNo
cost_usdcYesPrice charged in stablecoin units (USDC/USDT 1:1); 0 on the free tier.
final_urlYes
redirectsYes
fetched_atNoUTC timestamp when the data was fetched.
html_bytesYes
open_graphYes
robots_txtNo
word_countYes
http_statusYes
meta_robotsNo
title_lengthYes
twitter_cardNo
hreflang_countYes
meta_descriptionNo
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`.
structured_data_blocksYes
meta_description_lengthYes

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed1 schema field changed
    • changedOutput schema / (root)
      Previous value: -nullNew value: +{
      +  "description": "Response for ``POST /seo-check``.",
      +  "properties": {
      +    "canonical": {
      +      "anyOf": [
      +        {
      +          "type": "string"
      +        },
      +        {
      +          "type": "null"
      +        }
      +      ],
      +      "default": null,
      +      "title": "Canonical"
      +    },
      +    "cost_usdc": {
      +      "description": "Price charged in stablecoin units (USDC/USDT 1:1); 0 on the free tier.",
      +      "title": "Cost Usdc",
      +      "type": "number"
      +    },
      +    "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"
      +    },
      +    "grade": {
      +      "title": "Grade",
      +      "type": "string"
      +    },
      +    "h1": {
      +      "items": {
      +        "type": "string"
      +      },
      +      "title": "H1",
      +      "type": "array"
      +    },
      +    "h2_count": {
      +      "title": "H2 Count",
      +      "type": "integer"
      +    },
      +    "hreflang_count": {
      +      "title": "Hreflang Count",
      +      "type": "integer"
      +    },
      +    "html_bytes": {
      +      "title": "Html Bytes",
      +      "type": "integer"
      +    },
      +    "http_status": {
      +      "title": "Http Status",
      +      "type": "integer"
      +    },
      +    "https": {
      +      "title": "Https",
      +      "type": "boolean"
      +    },
      +    "images": {
      +      "additionalProperties": {
      +        "type": "integer"
      +      },
      +      "title": "Images",
      +      "type": "object"
      +    },
      +    "issues": {
      +      "items": {
      +        "additionalProperties": true,
      +        "type": "object"
      +      },
      +      "title": "Issues",
      +      "type": "array"
      +    },
      +    "lang": {
      +      "anyOf": [
      +        {
      +          "type": "string"
      +        },
      +        {
      +          "type": "null"
      +        }
      +      ],
      +      "default": null,
      +      "title": "Lang"
      +    },
      +    "links": {
      +      "additionalProperties": {
      +        "type": "integer"
      +      },
      +      "title": "Links",
      +      "type": "object"
      +    },
      +    "load_ms": {
      +      "title": "Load Ms",
      +      "type": "integer"
      +    },
      +    "meta_description": {
      +      "anyOf": [
      +        {
      +          "type": "string"
      +        },
      +        {
      +          "type": "null"
      +        }
      +      ],
      +      "default": null,
      +      "title": "Meta Description"
      +    },
      +    "meta_description_length": {
      +      "title": "Meta Description Length",
      +      "type": "integer"
      +    },
      +    "meta_robots": {
      +      "anyOf": [
      +        {
      +          "type": "string"
      +        },
      +        {
      +          "type": "null"
      +        }
      +      ],
      +      "default": null,
      +      "title": "Meta Robots"
      +    },
      +    "open_graph": {
      +      "additionalProperties": true,
      +      "title": "Open Graph",
      +      "type": "object"
      +    },
      +    "redirects": {
      +      "title": "Redirects",
      +      "type": "integer"
      +    },
      +    "robots_txt": {
      +      "anyOf": [
      +        {
      +          "additionalProperties": true,
      +          "type": "object"
      +        },
      +        {
      +          "type": "null"
      +        }
      +      ],
      +      "default": null,
      +      "title": "Robots Txt"
      +    },
      +    "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"
      +    },
      +    "score": {
      +      "title": "Score",
      +      "type": "integer"
      +    },
      +    "sitemap": {
      +      "anyOf": [
      +        {
      +          "additionalProperties": true,
      +          "type": "object"
      +        },
      +        {
      +          "type": "null"
      +        }
      +      ],
      +      "default": null,
      +      "title": "Sitemap"
      +    },
      +    "structured_data_blocks": {
      +      "title": "Structured Data Blocks",
      +      "type": "integer"
      +    },
      +    "title": {
      +      "anyOf": [
      +        {
      +          "type": "string"
      +        },
      +        {
      +          "type": "null"
      +        }
      +      ],
      +      "default": null,
      +      "title": "Title"
      +    },
      +    "title_length": {
      +      "title": "Title Length",
      +      "type": "integer"
      +    },
      +    "token": {
      +      "default": "USDC",
      +      "description": "Token actually used for payment (USDC, USDT or FREE).",
      +      "title": "Token",
      +      "type": "string"
      +    },
      +    "twitter_card": {
      +      "anyOf": [
      +        {
      +          "type": "string"
      +        },
      +        {
      +          "type": "null"
      +        }
      +      ],
      +      "default": null,
      +      "title": "Twitter Card"
      +    },
      +    "url": {
      +      "title": "Url",
      +      "type": "string"
      +    },
      +    "viewport": {
      +      "anyOf": [
      +        {
      +          "type": "string"
      +        },
      +        {
      +          "type": "null"
      +        }
      +      ],
      +      "default": null,
      +      "title": "Viewport"
      +    },
      +    "word_count": {
      +      "title": "Word Count",
      +      "type": "integer"
      +    },
      +    "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",
      +    "http_status",
      +    "redirects",
      +    "https",
      +    "load_ms",
      +    "html_bytes",
      +    "title_length",
      +    "meta_description_length",
      +    "h1",
      +    "h2_count",
      +    "word_count",
      +    "images",
      +    "links",
      +    "open_graph",
      +    "structured_data_blocks",
      +    "hreflang_count",
      +    "issues",
      +    "score",
      +    "grade"
      +  ],
      +  "type": "object"
      +}
  2. Changed2 schema fields changed
    • addedInput schema / properties / check_robots / default
      Added value: +true
    • 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

A4.4/5.0
Behavior5/5

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

Annotations declare readOnlyHint and openWorldHint, but the description adds critical behavioral details: it is a paid service (pay per call with specific tokens on a specific chain), includes a free tier per wallet, and performs network requests to probe robots.txt/sitemap. It also discloses the output format (prioritized issues and a 0-100 score with grade). This significantly enriches the behavioral profile beyond the annotations and contains no contradictions.

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

Conciseness4/5

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

The description is a single, information-dense sentence that front-loads the core purpose and lists the audit components efficiently. The payment and free-tier details are placed at the end, which is logical. It avoids redundancy but the long list of checks could be slightly tightened; still, it is appropriately sized for the tool's scope.

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

Completeness5/5

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

The tool has a rich output schema, so return values need not be elaborated. The description covers the tool's purpose, key behaviors (including payment and free tier), and the optional robots.txt/sitemap flag. For a tool with this complexity and the presence of an output schema, nothing essential is missing for an agent to invoke it correctly.

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 all five parameters are already documented in the input schema. The description adds no additional parameter-level meaning beyond what the schema provides. Per the rubric, a high coverage baseline of 3 is appropriate.

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

Purpose5/5

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

The description states a specific verb ('audit'), a resource ('any URL'), and enumerates the exact elements checked (title, meta description, canonical, headings, etc.). It clearly distinguishes itself from sibling tools like web_crawl or html_to_markdown by focusing on SEO-specific analysis. No ambiguity remains about what the tool does.

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 defines its domain (on-page SEO audit) and includes practical usage context: payment per call via USDC/USDT on Base, a free tier of 3 calls per wallet, and the ability to toggle robots.txt/sitemap checking. It does not explicitly name alternatives or exclusions, but no sibling tool provides a comparable SEO audit, so the intended usage is unambiguous. Slight deduction for not stating when not to use it.

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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