Agent Tools MCP

Measured conclusion: Deep-tested. L2 outcome: tools_ok.

32 free MCP tools for data validation, text optimization, and synthetic test data.

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{
  "mcpServers": {
    "Agent Tools MCP": {
      "url": "https://agent-tools-mcp.yvan11.workers.dev/mcp",
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Measured tools (32)

• is-card-safe read-only

  Check payment-card brand, length and Luhn checksum. Use with synthetic card numbers in payment-form tests. Returns {ok, normalized?, brand?, last4?, issues}; not a payment authorization or fraud check.

  Parameters:

  • number (required) — string — Synthetic payment-card number string to examine; do not provide real card details.

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• is-email-safe read-only

  Check conservative ASCII email address syntax. Use to reject malformed addresses in forms and test fixtures. Returns true or false; does not check mailbox existence or deliverability.

  Parameters:

  • email (required) — string — Email address string to check, such as [email protected]; ASCII format only.

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• is-iban-safe read-only

  Check IBAN country rules, length and checksum against a bundled registry. Use to screen public or synthetic IBANs in test data. Returns {ok, normalized?, issues}; does not verify account ownership or transferability.

  Parameters:

  • iban (required) — string — IBAN string, optionally with spaces; do not submit real private bank account details.

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• is-iso-date-safe read-only

  Check Gregorian YYYY-MM-DD calendar dates, including leap days. Use for date-only form fields, not timestamps or timezone offsets. Returns true for a valid date, otherwise false.

  Parameters:

  • date (required) — string — Candidate date formatted YYYY-MM-DD, such as 2024-02-29.

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• is-ip-safe read-only

  Check IPv4 or IPv6 literal-address syntax. Use to screen candidate IP strings, not test reachability or geolocation. Returns {ok, version, issues}; version is 4, 6 or null.

  Parameters:

  • ip (required) — string — IPv4 or IPv6 literal address such as 192.0.2.1 or 2001:db8::1.

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• is-json-safe read-only

  Parse JSON with bounded depth, key counts and input size. Use to screen JSON without execution; use optimize-dataset for JSONL or CSV cleanup. Returns {ok, issues, bytes, depth, keys, value?}; parsed value is included only when valid.

  Parameters:

  • json (required) — string — JSON document as a string, up to 4096 characters; depth and key counts are limited.

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• is-password-safe read-only

  Evaluate password strength using local heuristics. Use only with dummy passwords when testing password policies. Returns {ok, score, entropyBits, length, sets, reasons, suggestions}; no breach-database lookup.

  Parameters:

  • password (required) — string — Fictitious test password; never supply an actual password or secret.

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• is-phone-e164 read-only

  Check phone number syntax against E.164 after local normalization. Use to test international number formats, including spaces or 00 prefixes. Returns true or false, not the normalized number; no subscriber or reachability check.

  Parameters:

  • phone (required) — string — Candidate internationally formatted telephone number, for example +66812345678.

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• is-uuid-safe read-only

  Check canonical UUID syntax and optional RFC variant/version. Use to validate UUIDs; use generate-token to create them. Returns true or false; does not check uniqueness or resource existence.

  Parameters:

  • uuid (required) — string — UUID string in canonical hyphenated format.
  • version — integer — Optional UUID version number from 1 to 8; omit to accept any supported version.

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• is-url-safe read-only

  Check absolute HTTP or HTTPS URL syntax. Use to screen links before display or storage. Returns true or false; does not visit or assess the site's safety.

  Parameters:

  • url (required) — string — Absolute HTTP(S) URL string; other schemes such as javascript: are not supported.

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• is-us-tin-safe read-only

  Check synthetic US EIN, SSN or ITIN number formats. Use with tax-ID input fixtures, never real personal identifiers. Returns {ok, normalized?, type, issues}; does not verify IRS issuance or identity.

  Parameters:

  • tin (required) — string — Synthetic US taxpayer identifier string; do not submit actual personal identifiers.

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• is-vat-safe read-only

  Check country-specific VAT number patterns. Use to screen VAT fixtures before form submission. Returns {ok, country?, normalized?, issues}; no VIES lookup or active-registration check.

  Parameters:

  • vat (required) — string — Country-prefixed VAT number string such as DE123456789.

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• optimize-dataset read-only

  Clean and compact JSON, JSONL or CSV rows. Use for small datasets; use is-json-safe to check JSON syntax without changes. Returns text in the selected format; trims strings, deduplicates rows and may drop mostly empty columns.

  Parameters:

  • input (required) — string — Source dataset text (maximum 4096 characters).
  • format — string — Parsing format: auto detects, or explicitly select json, jsonl or csv.

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• optimize-google-tag read-only

  Rebuild GA4 gtag.js markup from a G- measurement ID. Use on existing GA4 snippets, not GTM containers or consent setup. Returns replacement HTML with async loading and a config call, or original input if no G- ID exists. Review lost settings and consent.

  Parameters:

  • html (required) — string — Existing HTML snippet containing the Google Analytics tag to optimize.

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• minify-html read-only

  Remove comments and compact whitespace in HTML fragments. Use for small, controlled HTML snippets, not full document compilation. Returns an HTML string; preserves pre, textarea, script and style contents. Regression-test rendered output.

  Parameters:

  • html (required) — string — Original HTML source as text, up to 4096 characters.

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• minify-js read-only

  Compact small JavaScript snippets. Use for basic source cleanup, not AST-aware production minification. Returns JavaScript text, sometimes unchanged for complex syntax; regression-test its behavior.

  Parameters:

  • code (required) — string — JavaScript source code string, limited to 4096 characters.

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• minify-css read-only

  Reduce whitespace in CSS snippets. Use for basic stylesheet cleanup rather than production minification. Not a full CSS parser; visually test the result.

  Parameters:

  • code (required) — string — CSS source code string, limited to 4096 characters.

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• minify-prompt read-only

  Normalize prompt whitespace and line breaks. Use to compact formatting before calling a model; filler phrases are not removed. Returns trimmed text with normalized spacing; review prompts where whitespace carries meaning.

  Parameters:

  • text (required) — string — Prompt text to compact, up to 4096 characters.

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• strip-ansi read-only

  Strip terminal ANSI escape codes from text. Use to make colorized logs readable for indexing or display. Returns plain text without interpreting log entries.

  Parameters:

  • text (required) — string — Terminal output string containing optional ANSI escape sequences.

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• generate-avatar read-only

  Create an SVG placeholder profile icon. Use for synthetic avatars in demos and UI prototypes. Returns SVG markup, not a photorealistic likeness.

  Parameters:

  • seed — string — Optional deterministic seed for repeatable test fixtures; do not use as a secret.
  • size — integer — SVG width and height in pixels, from 32 to 256.
  • text — string — Optional initials or label used to customize the placeholder.
  • pattern — string — Avatar layout: initials, blocks, circles or random.

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• generate-card-number read-only

  Generate a synthetic payment-card fixture. Use for payment-form UI tests requiring a Luhn-valid card number. Returns {number, brand, expiry, cvc}; values are synthetic, not issued credentials.

  Parameters:

  • seed — string — Optional deterministic seed for reproducible fake card fixtures.
  • brand — string — Synthetic card brand: visa, mastercard, amex or discover.

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• generate-color read-only

  Generate a palette from a base color and harmony scheme. Use for design prototypes; defaults: random base, triadic scheme, five hex colors. Returns {base, scheme, colors, textOnBase}; text color is heuristic, not a WCAG contrast check.

  Parameters:

  • base — string — Optional base color such as #3366ff.
  • seed — string — Optional deterministic seed for repeatable palette generation.
  • count — integer — Number of colors, from 1 to 12.
  • format — string — Output color notation: hex, rgb or hsl.
  • scheme — string — Palette harmony algorithm: complementary, triadic, tetradic, analogous, monochrome or random.

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• generate-dataset read-only

  Generate synthetic rows as JSON, JSONL or CSV. Use for data import/export tests; use generate-fake-data for preset people or company fixtures. Returns at most eight records without accessing a database.

  Parameters:

  • seed — string — Optional deterministic seed for reproducible test rows.
  • count — integer — Number of records to generate, 1–8, default 3.
  • format — string — Output format: json, jsonl or csv.
  • schema — object — Optional map of field names to upstream synthetic field specifications; no real records.

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• generate-fake-data read-only

  Create fictional users, companies, addresses or rows. Use to seed demos with preset records; use generate-dataset for custom fields. Synthetic values are not verified identities.

  Parameters:

  • kind (required) — string — Fixture category: user, company, address or rows.
  • seed — string — Optional deterministic seed to reproduce the same fake records.
  • count — integer — Requested number of synthetic records, up to eight.

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• generate-hash read-only

  Compute SHA-256 or legacy MD5 text digests. Use for non-secret content fingerprints; generate-token creates new IDs instead. Returns a hex digest; unsuitable for password storage or key derivation.

  Parameters:

  • text (required) — string — Public or synthetic text to digest; never send secrets for hashing.
  • algo — string — Digest algorithm: sha-256 (default) or legacy md5.

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• generate-lorem read-only

  Generate lorem ipsum placeholder copy. Use for mock layouts needing filler words, sentences or paragraphs. Returns synthetic copy, not sourced editorial content.

  Parameters:

  • seed — string — Optional deterministic seed for reproducible placeholder text.
  • count — integer — Number of units, from 1 to 8; default 3.
  • units — string — Output unit: words, sentences or paragraphs.

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• generate-password read-only

  Generate random or seeded test passwords. Use for demo login fields; use generate-token for identifiers. Seeded values are predictable and visible to MCP clients; not a secure credential vault.

  Parameters:

  • seed — string — Optional deterministic seed for testing only; seeded output is predictable.
  • length — integer — Desired password length, 8–256 characters.
  • symbols — boolean — Whether punctuation/symbol characters are included.

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• generate-phone-number read-only

  Generate fictional US-format phone numbers. Use for US demo phone fields; when supplied, city selects a local area-code pool and must match state. Returns an array of fictional (AAA) 555-01XX numbers; no subscriber lookup.

  Parameters:

  • city — string — Optional city: Los Angeles, San Francisco, New York, Houston or Miami; must match state if given.
  • seed — string — Optional deterministic seed for repeatable test numbers.
  • count — integer — Number of fabricated numbers, up to eight.
  • state — string — Optional US state abbreviation: CA, NY, TX or FL.

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• generate-prompt read-only

  Fill a prompt template with supplied variables. Use {name} placeholders with matching vars.name; missing variables become empty text. Returns a prompt string without invoking a model; code/image modes can add framing.

  Parameters:

  • template (required) — string — Template text, e.g. Hello {name}; omitted variables are replaced with empty text.
  • seed — string — Optional deterministic seed for the {{RAND_INT:min,max}} helper, not ordinary placeholders.
  • type — string — Prompt template category: text, code or image; default text.
  • vars — object — Object mapping placeholder names to values, e.g. {"name":"Ada"} for {name}.

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• generate-slug read-only

  Convert a title into a Unicode-aware URL slug. Use when forming new path segments from headings. Inspect output before publishing permanent URLs.

  Parameters:

  • text (required) — string — Source title to normalize, such as Café startups!.
  • maxLength — integer — Maximum slug length, 1–160 characters; omit for the upstream default.

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• generate-ssn read-only

  Generate fictional US SSN-style test identifiers. Use for SSN test fields; use generate-fake-data for mixed-record fixtures. Returns a string for count=1, otherwise an array; structural validity does not confirm issuance.

  Parameters:

  • seed — string — Optional deterministic seed for repeatable fake identifiers.
  • count — integer — Number of synthetic SSN-style fixtures, 1–8.
  • valid — boolean — Whether fixtures should pass the generator's structural validity rules, not actual issuance checks.
  • formatted — boolean — Whether to add standard dashes to the generated identifier.

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• generate-token read-only

  Generate token strings or UUIDs. Use for test identifiers; use generate-password for password fixtures. Seeded output is predictable and unsuitable for authentication credentials.

  Parameters:

  • type (required) — string — Token format: uuid, hex, base64 or numeric.
  • seed — string — Optional deterministic seed, intended for reproducible test output only.
  • length — integer — Output length parameter, 1–256, where applicable to the selected token type.

  Hints: read-only yes · destructive no · idempotent yes · open-world no

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