castomAPI
Get your key

Convert, generate & parse · 14 operations

Generate API

Hashes, secrets, RSA keypairs, QR codes, screenshots, PDFs and DOCX from HTML, names and identities for test data.

Utilities 1–3 tokens API key

Endpoints in Generate

POSTCompute Hash-based Message Authentication Code using SHA-256/v1/generate/hash/hmac-sha256free POSTCompute MD5 cryptographic checksum/v1/generate/hash/md5free POSTCompute RIPEMD-160 hash/v1/generate/hash/ripemd160free POSTCompute SHA-1 hash/v1/generate/hash/sha1free POSTCompute secure SHA-256 hash/v1/generate/hash/sha256free POSTCompute high-security SHA-512 hash/v1/generate/hash/sha512free POSTConvert raw HTML into a downloadable .docx (Word) document/v1/generate/html-to-docx1 token POSTRender raw HTML strings into downloadable A4/Letter PDF documents/v1/generate/html-to-pdfPRO 3 tokens POSTGenerate full synthetic identities with realistic address/v1/generate/identityfree POSTGenerate random first and last names with options for count/v1/generate/namesfree POSTGenerate customizable QR codes in Data URL (PNG)/v1/generate/qrcodefree POSTGenerate secure PKCS#8 RSA or Ed25519 keypairs in PEM or JWK formats…/v1/generate/rsa-keypair2 tokens POSTCapture an above-the-fold viewport screenshot of any website/v1/generate/screenshotPRO 2 tokens POSTGenerate cryptographically secure passwords/v1/generate/secretsfree

Cost and limits

This operation costs 1–3 tokens. A call that fails is never billed. Every account gets 1000 free tokens a month; paid balances never expire.

Rate limits per minute

No key 10 · Free 60 · Pro 300 · Enterprise 1200 ·

OpenAPI

https://app.castomapi.com/docs/json

Convert, generate & parse

Convert

Currencies, colours, coordinates, timestamps, data formats, encodings, numerals, casing — one call each.

Parse

Receipts, invoices (KSeF, ZUGFeRD), e-mails, files, webhooks, user agents, JSON and JSON Schema — into structure.

Minify

HTML, code, JSON, SVG, SQL, GraphQL, URLs and image metadata, made smaller without changing meaning.

Utilities

DNS, GeoIP, weather, domain checks, disposable e-mail, image search, OCR, PDF to text and image, Excel to JSON.