Superflow Free Tools

Find overlapping working hours and meeting times across cities or countries. Resolves locations to IANA time zones and applies daylight saving for the requested date. Returns resolved locations, overlap windows, the earliest matching meeting starts with UTC and local times, readable copy text, and a link to open the plan. Ambiguous names or countries with multiple zones return choices: retry with a returned location ID or a more specific city/region/country. The same working schedule is applied in each location's local time; the browser plan supports individual schedules. Does not access calendars, account for holidays, send invitations, or book meetings. Returns { ok, date, dateZone, durationMinutes, locations[], overlapMinutes, overlapWindows[], slots[] with UTC/local times and copyText, totalAvailableStarts, hasMore, planUrl, availability }. Limit: No application rate limit. Up to 8 locations, 20 returned starts, and a 16 KB request body; no result storage.. Allow up to 10s for a response. Free, no account, no API key.

{
  "type": "object",
  "properties": {
    "locations": {
      "type": "array",
      "items": {
        "type": "string",
        "maxLength": 150
      },
      "minItems": 1,
      "maxItems": 8,
      "description": "Cities, single-zone countries, or location IDs returned in choices. Include a region/country to distinguish namesakes, e.g. San Francisco California or London United Kingdom. The first location determines the date being searched."
    },
    "date": {
      "type": "string",
      "description": "Meeting date as YYYY-MM-DD (2000–2099), in the first location's time zone. Required: use the actual meeting date so daylight saving is correct."
    },
    "durationMinutes": {
      "type": "number",
      "description": "Length of the whole meeting, 15–1440 minutes in 15-minute increments.",
      "default": 30
    },
    "workStart": {
      "type": "string",
      "description": "Start of working hours, as local 24-hour HH:mm, in 15-minute increments. Applied to all locations.",
      "default": "09:00"
    },
    "workEnd": {
      "type": "string",
      "description": "End of working hours, as local 24-hour HH:mm, in 15-minute increments. An earlier end means an overnight shift. Must differ from workStart.",
      "default": "18:00"
    },
    "workDays": {
      "type": "string",
      "description": "Comma-separated working days: 0=Sunday through 6=Saturday. For overnight shifts, the day the shift starts. Applied to all locations.",
      "default": "1,2,3,4,5"
    },
    "limit": {
      "type": "number",
      "description": "Maximum suggested meeting starts to return, 1–20. Earliest first, at 15-minute intervals; totalAvailableStarts reports the full count.",
      "default": 10
    }
  },
  "required": [
    "locations",
    "date"
  ],
  "additionalProperties": false
}

Check whether AI assistants (ChatGPT, Claude, Perplexity, Google AI) can reach, read, and cite a web page. Runs the full suite: robots.txt rules per AI crawler, a live firewall test that requests the page as GPTBot, JavaScript dependency, llms.txt, headings, structured data, and author identity. Returns a score out of 100 with a grade, a score per category, and a finding per check with why it matters and how to fix it. Use this for a whole-page verdict; use check_robots_txt_for_ai when the question is only about crawler access. Returns { ok, report: { score, grade, scoredOutOf, categories[], findings[] with why and fix, detection }, cached, ageSeconds }. Limit: 10 runs per hour per IP. Allow up to 75s for a response. Free, no account, no API key. Pass `url` to start a run. A slow run answers with `{ status: "pending", runId }` instead of a result: call this same tool again with just that `runId` to collect it, as many times as it takes. Collecting costs no rate-limit slot.

{
  "type": "object",
  "properties": {
    "url": {
      "type": "string",
      "description": "The page to run against. A bare domain like example.com is fine; https is assumed. Must be a public URL: anything behind a login, on a private network, or on localhost is refused."
    },
    "refresh": {
      "type": "boolean",
      "description": "Skip the 24 hour cache and run again. Costs a rate-limit slot even when a cached result exists, so leave it off unless the page has changed.",
      "default": false
    },
    "runId": {
      "type": "string",
      "description": "Collect a run that answered with `{ status: \"pending\", runId }` instead of a result. Send the runId back on its own, with no url, and the same tool returns the finished result once the run is done. Costs no rate-limit slot."
    }
  },
  "required": [],
  "additionalProperties": false
}

Test a site's robots.txt against every AI crawler that matters (GPTBot, ClaudeBot, PerplexityBot, Google-Extended, CCBot, Googlebot, Bingbot and the rest) and report which are allowed, which are blocked, and which rule decided it. Also runs a firewall test, because CDN-level blocks stop crawlers before robots.txt is ever read. This is the access-scoped view of check_ai_visibility. Returns { ok, report: { accessScore, crawlers[] with the rule that decided each verdict, firewall, findings[] }, cached, ageSeconds }. Limit: 10 runs per hour per IP. Allow up to 75s for a response. Free, no account, no API key. Pass `url` to start a run. A slow run answers with `{ status: "pending", runId }` instead of a result: call this same tool again with just that `runId` to collect it, as many times as it takes. Collecting costs no rate-limit slot.

{
  "type": "object",
  "properties": {
    "url": {
      "type": "string",
      "description": "The page to run against. A bare domain like example.com is fine; https is assumed. Must be a public URL: anything behind a login, on a private network, or on localhost is refused."
    },
    "refresh": {
      "type": "boolean",
      "description": "Skip the 24 hour cache and run again. Costs a rate-limit slot even when a cached result exists, so leave it off unless the page has changed.",
      "default": false
    },
    "runId": {
      "type": "string",
      "description": "Collect a run that answered with `{ status: \"pending\", runId }` instead of a result. Send the runId back on its own, with no url, and the same tool returns the finished result once the run is done. Costs no rate-limit slot."
    }
  },
  "required": [],
  "additionalProperties": false
}

Generate llms.txt and llms-full.txt for a site, following the llmstxt.org convention. Inventories the site from its robots.txt, sitemaps, and homepage links, then writes an index file and a full file with page content inlined. Deterministic: no model is involved, so two runs over an unchanged site produce the same bytes. Returns the file contents ready to write to disk. Returns { ok, report: { siteName, llmsTxt, llmsFullTxt, pagesDiscovered, pagesIncluded, truncated }, cached, ageSeconds }. Limit: 10 runs per hour per IP. Allow up to 75s for a response. Free, no account, no API key. Pass `url` to start a run. A slow run answers with `{ status: "pending", runId }` instead of a result: call this same tool again with just that `runId` to collect it, as many times as it takes. Collecting costs no rate-limit slot.

{
  "type": "object",
  "properties": {
    "url": {
      "type": "string",
      "description": "The page to run against. A bare domain like example.com is fine; https is assumed. Must be a public URL: anything behind a login, on a private network, or on localhost is refused."
    },
    "refresh": {
      "type": "boolean",
      "description": "Skip the 24 hour cache and run again. Costs a rate-limit slot even when a cached result exists, so leave it off unless the page has changed.",
      "default": false
    },
    "runId": {
      "type": "string",
      "description": "Collect a run that answered with `{ status: \"pending\", runId }` instead of a result. Send the runId back on its own, with no url, and the same tool returns the finished result once the run is done. Costs no rate-limit slot."
    }
  },
  "required": [],
  "additionalProperties": false
}

Fetch one web page and convert it to clean CommonMark, with the navigation, cookie banners, and boilerplate stripped out. Use this to read a page as text an agent can reason over, or to publish a .md copy of a page alongside the HTML. Returns { ok, report: { markdown, title, description, wordCount, bytes, truncated, httpStatus }, cached, ageSeconds }. Limit: 10 runs per hour per IP. Allow up to 75s for a response. Free, no account, no API key. Pass `url` to start a run. A slow run answers with `{ status: "pending", runId }` instead of a result: call this same tool again with just that `runId` to collect it, as many times as it takes. Collecting costs no rate-limit slot.

{
  "type": "object",
  "properties": {
    "url": {
      "type": "string",
      "description": "The page to run against. A bare domain like example.com is fine; https is assumed. Must be a public URL: anything behind a login, on a private network, or on localhost is refused."
    },
    "refresh": {
      "type": "boolean",
      "description": "Skip the 24 hour cache and run again. Costs a rate-limit slot even when a cached result exists, so leave it off unless the page has changed.",
      "default": false
    },
    "runId": {
      "type": "string",
      "description": "Collect a run that answered with `{ status: \"pending\", runId }` instead of a result. Send the runId back on its own, with no url, and the same tool returns the finished result once the run is done. Costs no rate-limit slot."
    }
  },
  "required": [],
  "additionalProperties": false
}

Read a page and write a schema.org JSON-LD block for it, then validate that block against the same checks a validator would run. The markup is model-written from the page's own content and should be reviewed before it is published. Returns the block ready to paste into a <script type="application/ld+json"> tag. Returns { ok, report: { detectedType, jsonLd, jsonLdString, validation: { findings[], passed }, model } }. Limit: 10 runs per hour per IP. Allow up to 75s for a response. Free, no account, no API key. Pass `url` to start a run. A slow run answers with `{ status: "pending", runId }` instead of a result: call this same tool again with just that `runId` to collect it, as many times as it takes. Collecting costs no rate-limit slot.

{
  "type": "object",
  "properties": {
    "url": {
      "type": "string",
      "description": "The page to run against. A bare domain like example.com is fine; https is assumed. Must be a public URL: anything behind a login, on a private network, or on localhost is refused."
    },
    "refresh": {
      "type": "boolean",
      "description": "Skip the 24 hour cache and run again. Costs a rate-limit slot even when a cached result exists, so leave it off unless the page has changed.",
      "default": false
    },
    "runId": {
      "type": "string",
      "description": "Collect a run that answered with `{ status: \"pending\", runId }` instead of a result. Send the runId back on its own, with no url, and the same tool returns the finished result once the run is done. Costs no rate-limit slot."
    }
  },
  "required": [],
  "additionalProperties": false
}

Read the structured data already on a page and check it against Schema.org and what search engines actually accept. Reports every JSON-LD block found, the type of each, and the errors and warnings per block. Returns { ok, report: { blockCount, invalidBlockCount, declaredTypes[], eligibility[], categories[], findings[] } }. Limit: 10 runs per hour per IP. Allow up to 75s for a response. Free, no account, no API key. Pass `url` to start a run. A slow run answers with `{ status: "pending", runId }` instead of a result: call this same tool again with just that `runId` to collect it, as many times as it takes. Collecting costs no rate-limit slot.

{
  "type": "object",
  "properties": {
    "url": {
      "type": "string",
      "description": "The page to run against. A bare domain like example.com is fine; https is assumed. Must be a public URL: anything behind a login, on a private network, or on localhost is refused."
    },
    "refresh": {
      "type": "boolean",
      "description": "Skip the 24 hour cache and run again. Costs a rate-limit slot even when a cached result exists, so leave it off unless the page has changed.",
      "default": false
    },
    "runId": {
      "type": "string",
      "description": "Collect a run that answered with `{ status: \"pending\", runId }` instead of a result. Send the runId back on its own, with no url, and the same tool returns the finished result once the run is done. Costs no rate-limit slot."
    }
  },
  "required": [],
  "additionalProperties": false
}

Read a page's Open Graph and Twitter card tags and report how the link will render on X, LinkedIn, Facebook, Slack, Discord, and Google. Returns a per-platform preview (title, description, image) plus the findings for tags that are missing, truncated, or the wrong size. Returns { ok, report: { previews[] per platform, tags, summary, findings[] }, cached, ageSeconds }. Limit: 10 runs per hour per IP. Allow up to 75s for a response. Free, no account, no API key. Pass `url` to start a run. A slow run answers with `{ status: "pending", runId }` instead of a result: call this same tool again with just that `runId` to collect it, as many times as it takes. Collecting costs no rate-limit slot.

{
  "type": "object",
  "properties": {
    "url": {
      "type": "string",
      "description": "The page to run against. A bare domain like example.com is fine; https is assumed. Must be a public URL: anything behind a login, on a private network, or on localhost is refused."
    },
    "refresh": {
      "type": "boolean",
      "description": "Skip the 24 hour cache and run again. Costs a rate-limit slot even when a cached result exists, so leave it off unless the page has changed.",
      "default": false
    },
    "runId": {
      "type": "string",
      "description": "Collect a run that answered with `{ status: \"pending\", runId }` instead of a result. Send the runId back on its own, with no url, and the same tool returns the finished result once the run is done. Costs no rate-limit slot."
    }
  },
  "required": [],
  "additionalProperties": false
}

Identify the platform, framework, CMS, ecommerce apps, analytics, CDN, and hosting behind a site by fingerprinting one page's HTML and response headers. One fetch, no rendering and no crawl, so it answers in about a second. A site behind bot protection is reported as blocked rather than as empty. Returns { platformName, theme, apps[], fonts[], analytics[], hosting[], renderMode, url, status, fetchedAt }. Limit: 60 runs per hour per IP. Allow up to 30s for a response. Free, no account, no API key.

{
  "type": "object",
  "properties": {
    "url": {
      "type": "string",
      "description": "The page to run against. A bare domain like example.com is fine; https is assumed. Must be a public URL: anything behind a login, on a private network, or on localhost is refused."
    },
    "refresh": {
      "type": "boolean",
      "description": "Skip the 24 hour cache and run again. Costs a rate-limit slot even when a cached result exists, so leave it off unless the page has changed.",
      "default": false
    }
  },
  "required": [
    "url"
  ],
  "additionalProperties": false
}

Check whether a site's favicon actually works. Reads every icon declaration in the page head, then fetches each one, the web app manifest, and the implicit /favicon.ico, and identifies the real format and pixel dimensions from each file's header bytes. Catches the failures a status-code check misses: a catch-all route answering an icon path with HTML at HTTP 200, a sizes attribute that disagrees with the file, an icon served over http on an https page. Use this when a favicon is missing or blurry; use check_social_preview for the image that appears when a link is shared. Returns { hasWorkingFavicon, tabIcon, icons[] with format, dimensions, bytes and problem, manifest, themeColor, checks[] with id, status and fix, counts }. Limit: 60 runs per hour per IP. Allow up to 30s for a response. Free, no account, no API key.

{
  "type": "object",
  "properties": {
    "url": {
      "type": "string",
      "description": "The page to run against. A bare domain like example.com is fine; https is assumed. Must be a public URL: anything behind a login, on a private network, or on localhost is refused."
    },
    "refresh": {
      "type": "boolean",
      "description": "Skip the 24 hour cache and run again. Costs a rate-limit slot even when a cached result exists, so leave it off unless the page has changed.",
      "default": false
    }
  },
  "required": [
    "url"
  ],
  "additionalProperties": false
}

Capture a full-height PNG of a page in a real headless browser, scrolling first so lazy-loaded content renders. Returns a signed link to the image that expires in about 24 hours; download the bytes if you need to keep them. No watermark and no height cap. Cannot capture anything behind a login. Returns { imageUrl, expiresAt, bytes, width, height, deviceType }. Limit: 10 runs per hour per IP. Allow up to 90s for a response. Free, no account, no API key. Pass `url` to start a run. A slow run answers with `{ status: "pending", runId }` instead of a result: call this same tool again with just that `runId` to collect it, as many times as it takes. Collecting costs no rate-limit slot.

{
  "type": "object",
  "properties": {
    "url": {
      "type": "string",
      "description": "The page to run against. A bare domain like example.com is fine; https is assumed. Must be a public URL: anything behind a login, on a private network, or on localhost is refused."
    },
    "refresh": {
      "type": "boolean",
      "description": "Skip the 24 hour cache and run again. Costs a rate-limit slot even when a cached result exists, so leave it off unless the page has changed.",
      "default": false
    },
    "runId": {
      "type": "string",
      "description": "Collect a run that answered with `{ status: \"pending\", runId }` instead of a result. Send the runId back on its own, with no url, and the same tool returns the finished result once the run is done. Costs no rate-limit slot."
    }
  },
  "required": [],
  "additionalProperties": false
}

Find every image on a page and draft alt text for the ones that need it, using a vision model that actually looks at the image. Lists every image with the alt it has today, the suggested alt, whether it looks decorative, and why any image was skipped. Up to 10 images per run go to the model. The suggestions are drafts for a human to review. Returns { images[] with src, hadAlt, currentAlt, suggestedAlt, isDecorative, skippedReason; counts; model }. Limit: 10 runs per hour per IP. Allow up to 90s for a response. Free, no account, no API key. Pass `url` to start a run. A slow run answers with `{ status: "pending", runId }` instead of a result: call this same tool again with just that `runId` to collect it, as many times as it takes. Collecting costs no rate-limit slot.

{
  "type": "object",
  "properties": {
    "url": {
      "type": "string",
      "description": "The page to run against. A bare domain like example.com is fine; https is assumed. Must be a public URL: anything behind a login, on a private network, or on localhost is refused."
    },
    "refresh": {
      "type": "boolean",
      "description": "Skip the 24 hour cache and run again. Costs a rate-limit slot even when a cached result exists, so leave it off unless the page has changed.",
      "default": false
    },
    "runId": {
      "type": "string",
      "description": "Collect a run that answered with `{ status: \"pending\", runId }` instead of a result. Send the runId back on its own, with no url, and the same tool returns the finished result once the run is done. Costs no rate-limit slot."
    }
  },
  "required": [],
  "additionalProperties": false
}

Build a campaign URL with utm parameters, normalised to one tagging convention, and report which GA4 default channel group the link will land in. Warns about the mistakes that silently break reporting: an unrecognised medium that drops traffic into Unassigned, casing that splits one source into several report rows, PII in a campaign name. Pure string work: nothing is fetched and nothing is stored. Returns { url, normalized, channel, issues[] with level, field and message }. Limit: None. The work is local and costs nothing.. Allow up to 10s for a response. Free, no account, no API key.

{
  "type": "object",
  "properties": {
    "url": {
      "type": "string",
      "description": "The destination page. Existing utm parameters on it are rewritten; any other query parameter is left alone."
    },
    "source": {
      "type": "string",
      "description": "utm_source. Where the traffic comes from, e.g. newsletter."
    },
    "medium": {
      "type": "string",
      "description": "utm_medium. How it gets there, e.g. email, cpc, social. This is the field GA4 reads to pick a channel."
    },
    "campaign": {
      "type": "string",
      "description": "utm_campaign. The campaign name, e.g. spring_launch."
    },
    "id": {
      "type": "string",
      "description": "utm_id. Optional campaign ID."
    },
    "term": {
      "type": "string",
      "description": "utm_term. Optional paid keyword."
    },
    "content": {
      "type": "string",
      "description": "utm_content. Optional variant, e.g. header_link."
    },
    "caseRule": {
      "type": "string",
      "description": "How values are cased before they go in the URL. Default lower, which is what keeps one source from becoming three report rows.",
      "enum": [
        "lower",
        "preserve"
      ],
      "default": "lower"
    },
    "spaceRule": {
      "type": "string",
      "description": "What happens to spaces inside a value.",
      "enum": [
        "underscore",
        "hyphen",
        "preserve"
      ],
      "default": "underscore"
    },
    "stripPunctuation": {
      "type": "boolean",
      "description": "Drop accents and punctuation that make report rows hard to match.",
      "default": true
    }
  },
  "required": [
    "url"
  ],
  "additionalProperties": false
}

Hash text to an MD5 hex digest. Useful for checksums, cache keys, dedupe keys, and Gravatar-style identifiers. MD5 is broken for anything security-related: never use it for passwords or to verify authenticity. Returns { md5, algorithm, bytes }. Limit: None. The work is local and costs nothing.. Allow up to 10s for a response. Free, no account, no API key.

{
  "type": "object",
  "properties": {
    "text": {
      "type": "string",
      "description": "The text to hash. Up to 1 MB of UTF-8."
    }
  },
  "required": [
    "text"
  ],
  "additionalProperties": false
}