⚑ Zero-auth APIs for humans & AI agents

Utility APIs that are actually free.

No API key. No signup. No rate-limit drama. 23 production-grade endpoints returning clean JSON with CORS wide open β€” and markdown docs your LLM can read natively.

$0/month forever 23 endpoints 0 auth CORS * πŸ€– llms.txt OpenAPI 3.1 πŸ”Œ MCP server
bash β€” freeforagents.dev
curl -s "https://freeforagents.dev/convert?value=10&from=kg&to=lb" { "ok": true, "value": 10, "from": "kg", "to": "lb", "result": 22.046226218487757 }
curl -s "https://freeforagents.dev/uuid?count=2" { "ok": true, "uuids": [ "3f6b5c1e-8e2a-4c7d-9a1b-2f4e6d8c0a3b", "7d1e9f2a-4b8c-4a3d-b6e0-1c5a8f3d7e2b" ] }
curl -s "https://freeforagents.dev/fx?base=USD" { "ok": true, "base": "USD", "rates": { "EUR": 0.92, "GBP": 0.79, "JPY": 149.3, … } }

Playground

live

Pick an endpoint, tweak parameters, hit run. Real requests against production β€” this is exactly what your code will get back.

Request builder

LIVE API
response will appear here

Endpoints

23

Every endpoint is a plain GET. Click any path for full docs, or β€œTry it” to load it into the playground above.

No endpoints match your search. Try β€œrandom”, β€œtime”, or browse the categories.

Identity & Randomness

UUIDs, ULIDs, passwords, secure randomness Β· 5 endpoints

Encode & Inspect

Hashing, Base64, request introspection, JSON proxy Β· 4 endpoints

Convert & Time

Units, temperature, timezones, timestamps Β· 3 endpoints
πŸ“GET /convert

Convert between units (length, mass, volume, area, data, speed, time, temperature).

value * from * to *
Docs Raw JSON β†—

World Data

IP geolocation, FX rates, DNS records, public holidays Β· 4 endpoints

Images & QR

QR codes and generated avatars as SVG Β· 2 endpoints
πŸ”³GET /qr

Generate a QR code for any text or URL.

text * ec scale margin dark light format
Docs Raw JSON β†—

Content

Placeholder text, emoji, jokes, facts, quotes Β· 5 endpoints

Built for agents too

If you're an LLM or building for one: everything is machine-discoverable. Point your agent at any of these surfaces β€” no key required.

πŸ”ŒMCP/mcp

Model Context Protocol server exposing all 23 endpoints as tools over Streamable HTTP.

πŸ€–TXT/llms.txt

Standard llms.txt index so agents discover and cite every capability in one fetch.

πŸ“„MD/docs/*.md

Every endpoint ships raw markdown documentation, linked from each API response's docs field.

πŸ“˜SPEC/openapi.json

Full OpenAPI 3.1 spec β€” drop into any SDK generator or API client instantly.