All projects on Base matching “letters”

Offline structural validator for an Indian CIN (Corporate Identity Number, 21 characters). Parses and checks: listing status letter (L/U), 5-digit NIC industry code, 2-letter state code (against the known MCA state-code list), 4-digit incorporation year (plausible range), 3-letter company-type/ownership code (against a known enum like PLC, PTC, OPC, GOI, NPL, FTC, SGC, ULL, ULT), and 6-digit regis

Cyrillic transliteration to Latin using a named standard: ISO 9:1995 (one-to-one, with diacritics, covering the full standard: Russian, other Slavic, historic and non-Slavic Cyrillic letters) or BGN/PCGN, which is the Russian system only (Ukrainian, Serbian and other letters are passed through unmapped). Returns the transliteration, the source script, the standard, the mapped fraction and the unma

Convert between a spreadsheet column letter and its 1-based index in either direction. Provide exactly one of `letter` (e.g. "AA") or `number` (e.g. 27); the response always contains both.

Citation-locked medical-bill letter: No Surprises Act balance-bill dispute, health-plan internal appeal, hospital financial-assistance cover letter, Medicare redetermination, or GFE dispute filing pack — deterministic eligibility + computed deadlines + a ready-to-send document. Honest-no: nothing sold on expired windows or unprotected scenarios.

Brave — keyword web search over Brave's own independent index (not Google/Bing). Pass `q`; optional `count` (1-20), `offset` (pagination), `country` (2-letter), `search_lang`, `freshness` (pd|pw|pm|py or YYYY-MM-DDtoYYYY-MM-DD), `safesearch`, `result_filter` (comma list: web,news,videos,faq,discussions), `extra_snippets` (up to 5 alternative excerpts per hit). Returns ranked results with snippets

Active National Weather Service watches, warnings and advisories for a US coordinate or a two-letter state or marine area code - event, severity, certainty, urgency, headline, affected areas and zone codes, and effective/onset/expiry times in UTC. Read at request time, so an empty list means nothing is active. The 5 newest come back by default; detail=full adds the NWS narrative. Use when: Decide

Subscription-trap rights check — the FTC click-to-cancel rule is VACATED (8th Cir. 2025); your rights live in STATE auto-renewal laws. Deterministic duty + remedy math, 13 states: CA/NY/DC/VA/IL/VT/OR/HI/DE letter-worthy (DC treble/$1,500; HI $1,000 floor; DE treble + pre-suit notice), FL void-refund tier, honest-no CO/WA/GA. Effective-date gating, exempt-seller screen, scienter flags, SOL deadlin

Text to tiny, clean SVG code. Best for icons, logos, lettering and badges. Returns real shapes and editable text, each part its own layer. About 10 s.

Complete, ready-to-send Letter of Inquiry: funder and project in, a one-page LOI out — researched against the funder's actual stated priorities and mirroring their language, with every organisation-specific fact left as a [BRACKETED] placeholder (never invented), alignment points listed, and an honest funder-fit read. The document that gets you invited to submit a full proposal. Works for foundati

Encode text into international (ITU) Morse code. Letters are separated by spaces and words by "/". Supports A-Z, 0-9 and common punctuation; unsupported characters are clean 400s.

Check the status and tracking of a physical letter previously sent via POST /api/letters. Returns render status, expected delivery date, and (for certified mail) the USPS tracking number.

Takes a piece of text and either turns it into leetspeak (swapping some letters for numbers and symbols, like 'hello' becoming 'h3110') or turns leetspeak back into normal, easy-to-read words. The same words always produce the same result, so answers never change unexpectedly.

Lists entities publicly flagged as non-compliant under MiCA by EU national competent authorities. Query parameter: country (string, optional; 2-letter EU member-state code, e.g. IT). JSON response: count (number) and entities[] with legal_name, commercial_name, lei, home_member_state, competent_authority, website, infringement, reason, decision_date (ISO date), record_updated. Data source: ESMA In

Render a PDF. Pass `template` (one of 45 starter slugs: invoice, receipt, contract, certificate, nda, letter, report, quote, purchase-order, lease-agreement, resume, lab-report, boarding-pass, menu, bank-statement, etc.) or `html` (raw Handlebars HTML). Returns application/pdf bytes. $0.006 USDC per render, no API key, no signup. Full catalog: GET /v1/starters (free). Agent docs: https://pdfzen.si

Print and mail physical US letters (PDF, HTML, Markdown, DOCX, or image) and postcards via USPS, paid in USDC — with certified/registered proof options and standalone address verification at POST /v1/verify. Integration flow: POST /v1/documents to upload, POST /v1/quotes to lock a fixed USDC price for a recipient, then pay the returned per-quote x402 URL to create and mail the piece. Price is fixe

Markdown to a clean, print-ready PDF (US Letter or A4): one-pagers, checklists with tick boxes, cheat sheets, planner pages. Deterministic, no AI rewriting, up to 4 pages / 12k chars. Returns application/pdf.

One-country brief from the Voidly open censorship observatory: current index status (score, OONI anomaly rate, affected services), up to five recent incidents with citable IDs, and the 7-day censorship-event forecast. Input {"country":"IR"}: two letters (ISO 3166-1 alpha-2, any case). Codes without data return an empty incident list. An unavailable section is omitted. Voidly data CC BY 4.0; OONI-d

Compare text using deterministic, case-insensitive bag-of-words token-overlap similarity for lexical duplicate screening. Lowercase each input and tokenize with Python Unicode regex \w+ (letters, digits and underscores). Count repeated tokens. Similarity = sum(min(count_a(token),count_b(token))) / max(words_a,words_b,1), rounded to four decimal places. Returns exactly similarity in [0,1], words_a