{"id":276809,"recorded_at":"2026-10-26T19:06:06.553329Z","observed_at":"2026-10-26T19:06:06.553265Z","subject_kind":"endpoint","subject":"8d8945ea-fa32-4272-87a8-c295dd7d520e","kind":"mcp.tools","method":"probe.mcp/1","body":{"count":18,"tools":[{"description":"Decode a Base64 string into UTF-8 text and report invalid payloads as errors when recovering embedded credentials, tokens, or transport-encoded content.\n\nUse when:\n- Decode this Base64 string to UTF-8 text\n- Recover plain text from a Base64-encoded payload\n- Check whether a Base64 string is valid and decode it\n\nDo not use when:\n- Encode plain text to Base64 (use base64_encode)\n- Decode percent-encoded URL components (use url_decode)\n- Decrypt ciphertext—Base64 decoding is not decryption","inputSchema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"value":{"description":"Base64 text to decode","type":"string"}},"required":["value"],"type":"object"},"name":"base64_decode"},{"description":"Convert a UTF-8 string into standard Base64 when you need a portable text encoding for credentials, binary-safe transport, or embedding data in JSON/HTTP fields.\n\nUse when:\n- Encode this UTF-8 string as Base64\n- Convert plain text into standard Base64 for transport\n- Produce a Base64 representation of a credential or payload string\n\nDo not use when:\n- Decode Base64 back to text (use base64_decode)\n- Percent-encode URL components (use url_encode)\n- Hash or encrypt data for security—Base64 is encoding only","inputSchema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"value":{"description":"Text to encode","type":"string"}},"required":["value"],"type":"object"},"name":"base64_encode"},{"description":"Download the complete versioned countries dataset as JSON for caching, offline use, or multi-country analysis when a single country_lookup call is not enough.\n\nUse when:\n- Download the full countries dataset as JSON\n- Cache the complete versioned countries snapshot for offline use\n- Analyze or filter many countries without repeated single-code lookups\n\nDo not use when:\n- Look up metadata for a single country by ISO code (use country_lookup instead)\n- Look up one currency or language code (use currency_lookup / language_lookup)\n- Fetch live geopolitical or exchange-rate feeds\n\nPayment: 0.001 USDC via x402 on eip155:8453. No account. No API key. No signup.","inputSchema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"version":{"default":"1","description":"Dataset version to retrieve. Defaults to 1.","type":"string"}},"type":"object"},"name":"countries_bulk"},{"description":"Resolve an ISO 3166-1 alpha-2 country code (for example CA, US, JP) to official name, region, currency, calling code, languages, and related country metadata when you already have the two-letter code.\n\nUse when:\n- What currency and calling code does country code JP use?\n- Get official name, region, and languages for ISO country CA\n- Look up standardized metadata for a two-letter ISO 3166-1 country code\n\nDo not use when:\n- Download the full countries dataset for offline or multi-country use (use countries_bulk)\n- Look up currency symbol or decimals by ISO 4217 code alone (use currency_lookup)\n- Search for a country when you only know its English name and not the ISO code","inputSchema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"code":{"description":"ISO 3166-1 alpha-2 country code, for example CA or JP","maxLength":2,"minLength":2,"pattern":"^[A-Za-z]{2}$","type":"string"}},"required":["code"],"type":"object"},"name":"country_lookup"},{"description":"Resolve an ISO 4217 currency code such as USD, EUR, or JPY to its name, symbol, decimal places, and which countries use it when you need currency metadata rather than a live exchange rate.\n\nUse when:\n- What is the symbol and number of decimal places for EUR?\n- Which countries use currency code JPY?\n- Get ISO 4217 name and metadata for USD\n\nDo not use when:\n- Convert amounts between currencies or fetch live FX rates\n- Find which currency a country uses when you only have a country code (use country_lookup)\n- Validate payment-card-like numbers (use luhn_validate)","inputSchema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"code":{"maxLength":3,"minLength":3,"type":"string"}},"required":["code"],"type":"object"},"name":"currency_lookup"},{"description":"Explain what a numeric HTTP status code such as 404 or 429 means by returning its standard reason phrase and a short description for debugging or API responses.\n\nUse when:\n- What does HTTP status 404 mean?\n- Get the standard name and description for status code 429\n- Explain an HTTP response code returned by an API\n\nDo not use when:\n- Decide whether a request succeeded without needing the status name\n- Look up MIME types or content-type headers (use mime_lookup)\n- Diagnose TLS, DNS, or network failures that are not HTTP status codes","inputSchema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"code":{"maximum":599,"minimum":100,"type":"integer"}},"required":["code"],"type":"object"},"name":"http_status_lookup"},{"description":"Verify whether an ISBN-10 or ISBN-13 passes checksum rules and return normalized digits when checking book identifiers before catalog or purchase flows.\n\nUse when:\n- Is this ISBN valid?\n- Check the checksum for an ISBN-13 book identifier\n- Normalize and validate an ISBN-10 or ISBN-13 string\n\nDo not use when:\n- Look up book title, author, or cover metadata from an ISBN\n- Validate UUIDs (use uuid_validate) or payment-card Luhn numbers (use luhn_validate)\n- Validate arbitrary barcode formats that are not ISBN-10/13","inputSchema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"value":{"description":"ISBN-10 or ISBN-13 candidate","type":"string"}},"required":["value"],"type":"object"},"name":"isbn_validate"},{"description":"Parse a string as JSON to confirm it is well-formed and return a normalized representation when possible before further processing or storage.\n\nUse when:\n- Is this string valid JSON?\n- Parse and normalize a JSON payload before processing\n- Check whether agent or user-supplied text is well-formed JSON\n\nDo not use when:\n- Validate against a specific JSON Schema or OpenAPI model beyond well-formedness\n- Encode or decode Base64 (use base64_encode / base64_decode)\n- Validate UUID or ISBN identifier formats","inputSchema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"value":{"type":"string"}},"required":["value"],"type":"object"},"name":"json_validate"},{"description":"Resolve an ISO 639-1 language code such as en, fr, or ja to its English name and native name when you need language metadata from a two-letter code.\n\nUse when:\n- What language does ISO 639-1 code ja refer to?\n- Get the native name for language code fr\n- Resolve a two-letter language code to its English and native names\n\nDo not use when:\n- Translate text between languages\n- Detect the language of arbitrary free-form text\n- Look up country languages from a country code (use country_lookup)","inputSchema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"code":{"maxLength":3,"minLength":2,"type":"string"}},"required":["code"],"type":"object"},"name":"language_lookup"},{"description":"Run the Luhn checksum on a numeric string such as a payment-card-like identifier to verify the check digit before accepting or storing the value.\n\nUse when:\n- Does this number pass a Luhn check?\n- Validate a payment-card-like identifier checksum\n- Verify a numeric ID that uses a Luhn check digit\n\nDo not use when:\n- Charge a card, tokenize payments, or call a payment processor\n- Validate ISBNs (use isbn_validate) or UUIDs (use uuid_validate)\n- Look up currency metadata (use currency_lookup)","inputSchema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"value":{"description":"Numeric string to validate with Luhn","type":"string"}},"required":["value"],"type":"object"},"name":"luhn_validate"},{"description":"Map a file extension such as webp or png, or a MIME type string, to curated Content-Type metadata when setting headers, validating uploads, or choosing a media type.\n\nUse when:\n- What MIME type should I use for a .webp file?\n- Look up metadata for Content-Type application/json\n- Resolve a file extension to the correct MIME type for an upload or response header\n\nDo not use when:\n- Sniff or detect MIME type from raw file bytes\n- Encode or decode Base64 file payloads (use base64_encode / base64_decode)\n- Look up DNS top-level domain metadata (use tld_lookup)","inputSchema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"query":{"minLength":1,"type":"string"}},"required":["query"],"type":"object"},"name":"mime_lookup"},{"description":"Convert Unix epoch seconds or milliseconds to ISO-8601, or an ISO-8601 datetime to Unix epoch values, when bridging APIs that disagree on time formats.\n\nUse when:\n- Convert this Unix timestamp to ISO-8601\n- Turn an ISO-8601 datetime into epoch milliseconds\n- Bridge APIs that mix Unix seconds and ISO-8601 strings\n\nDo not use when:\n- Convert a datetime between IANA timezones while preserving the instant (use timezone_convert)\n- Convert length, mass, or temperature units (use unit_convert)\n- Interpret relative phrases like 'next Tuesday' or 'in 3 hours'","inputSchema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"input_format":{"description":"Format of value","enum":["unix_seconds","unix_milliseconds","iso8601"],"type":"string"},"value":{"description":"Unix timestamp or ISO-8601 datetime","type":"string"}},"required":["value","input_format"],"type":"object"},"name":"timestamp_convert"},{"description":"Convert an ISO-8601 datetime from one IANA timezone to another while preserving the same instant, including daylight-saving-aware wall times such as Toronto to Tokyo.\n\nUse when:\n- What time is 3pm Toronto in Tokyo?\n- Convert an ISO-8601 datetime from America/New_York to Europe/London\n- Show the same instant in another IANA timezone with DST-aware offsets\n\nDo not use when:\n- Only convert between Unix epoch and ISO-8601 without changing timezone (use timestamp_convert)\n- Convert length, mass, or temperature units (use unit_convert)\n- Guess a city timezone from a postal address without an IANA zone id","inputSchema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"datetime":{"description":"ISO-8601 datetime, with or without offset","type":"string"},"from_timezone":{"description":"IANA timezone for interpreting naive datetimes","type":"string"},"to_timezone":{"description":"IANA timezone for output","type":"string"}},"required":["datetime","from_timezone","to_timezone"],"type":"object"},"name":"timezone_convert"},{"description":"Identify what a DNS top-level domain such as com, io, or ai is classified as and commonly used for when classifying domains or answering TLD questions.\n\nUse when:\n- What kind of TLD is .io?\n- Is .ai a country-code or generic top-level domain?\n- Get curated metadata for DNS TLD com\n\nDo not use when:\n- Check whether a full domain name is registered or available\n- Resolve DNS records or WHOIS ownership\n- Look up MIME types for file extensions (use mime_lookup)","inputSchema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"tld":{"minLength":2,"type":"string"}},"required":["tld"],"type":"object"},"name":"tld_lookup"},{"description":"Convert a numeric value between supported length, mass, or temperature units—for example miles to kilometers or Celsius to Fahrenheit—when you need a deterministic unit conversion.\n\nUse when:\n- Convert 10 miles to kilometers\n- What is 25°C in Fahrenheit?\n- Convert a mass value between kilograms and pounds\n\nDo not use when:\n- Convert currencies or fetch exchange rates (use currency_lookup for metadata only)\n- Convert timestamps or timezones (use timestamp_convert / timezone_convert)\n- Convert unsupported unit categories outside length, mass, and temperature","inputSchema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"from_unit":{"type":"string"},"to_unit":{"type":"string"},"value":{"type":"number"}},"required":["value","from_unit","to_unit"],"type":"object"},"name":"unit_convert"},{"description":"Decode a percent-encoded URL component into plain text when reading query parameters, path segments, or form values that contain escaped characters.\n\nUse when:\n- Decode this percent-encoded URL component\n- Convert %20-style escapes back to plain text\n- Recover the original string from an encoded query parameter\n\nDo not use when:\n- Percent-encode text for a URL (use url_encode)\n- Decode Base64 payloads (use base64_decode)\n- Parse HTML entities that are not URL percent-encoding","inputSchema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"value":{"type":"string"}},"required":["value"],"type":"object"},"name":"url_decode"},{"description":"Apply encodeURIComponent-style percent-encoding so query parameters, path segments, or form values are safe to place in a URL.\n\nUse when:\n- Percent-encode this string for a query parameter\n- Make a path segment URL-safe with encodeURIComponent-style encoding\n- Encode special characters before inserting text into a URL\n\nDo not use when:\n- Decode a percent-encoded string (use url_decode)\n- Encode binary data as Base64 (use base64_encode)\n- Build or rewrite a full absolute URL structure beyond component encoding","inputSchema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"value":{"type":"string"}},"required":["value"],"type":"object"},"name":"url_encode"},{"description":"Check whether a string is a well-formed UUID and, when recognizable, report its version and variant so you can accept or reject identifier inputs confidently.\n\nUse when:\n- Is this string a valid UUID?\n- What version and variant is this UUID?\n- Validate a UUID before using it as a primary key or request id\n\nDo 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