Utility APIs that are actually free: no API key, no signup, no rate-limit drama. Built for developers, scripts, and AI agents. Every response is JSON, CORS is wide open, and every endpoint ships a markdown doc so LLMs can read it natively.
$0 / month hosting 20 endpoints CORS: * llms.txt OpenAPI 3.1 MCP server
Generate RFC 4122 version 4 UUIDs.
count (opt)
curl -s "https://freeforagents.dev/uuid?count=2"Generate ULIDs (sortable unique identifiers).
count (opt)
curl -s "https://freeforagents.dev/ulid"Hash text with SHA-1/256/384/512.
text algo (opt)
curl -s "https://freeforagents.dev/hash?text=hello&algo=sha-256"Encode or decode Base64 strings.
text mode (opt)
curl -s "https://freeforagents.dev/base64?text=hello+world"Convert between units (length, mass, volume, area, data, speed, time, temperature).
value from to
curl -s "https://freeforagents.dev/convert?value=10&from=kg&to=lb"Cryptographically secure random integers.
min (opt) max (opt) count (opt) decimals (opt)
curl -s "https://freeforagents.dev/random?min=1&max=6&count=2"Generate strong random passwords.
length (opt) count (opt)
curl -s "https://freeforagents.dev/password?length=20"Lorem ipsum placeholder text.
paragraphs (opt)
curl -s "https://freeforagents.dev/lorem?paragraphs=2"Public holidays by country and year.
country (opt) year (opt)
curl -s "https://freeforagents.dev/holidays?country=GB&year=2026"Foreign exchange rates (daily, no key).
base (opt)
curl -s "https://freeforagents.dev/fx?base=EUR"