One key, one base URL.

Join Discord and run /signup. The bot opens a modal that asks for your use case, bot-disclosure answer, and a randomized human challenge. Send the issued key as a bearer token.

Base URL
https://api.freetheai.xyz/v1

Header
Authorization: Bearer YOUR_API_KEY

FreeTheAi supports multiple API formats for easier client compatibility. You can use OpenAI-compatible Chat Completions, Anthropic-compatible Messages, and Responses-style routes with the same API key and the same model aliases.

Pick the route that matches your client. The model alias and the key never change between formats.

Point OpenAI-compatible clients at https://api.freetheai.xyz/v1. Use exact model aliases from /models.

curl https://api.freetheai.xyz/v1/chat/completions \
  -H "Authorization: Bearer $FREETHEAI_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "opc/deepseek-v4-flash-free",
    "messages": [
      { "role": "user", "content": "Write a tiny Flask route." }
    ],
    "stream": true
  }'

import OpenAI from "openai";

const client = new OpenAI({
  apiKey: process.env.FREETHEAI_API_KEY,
  baseURL: "https://api.freetheai.xyz/v1"
});

const res = await client.chat.completions.create({
  model: "opc/deepseek-v4-flash-free",
  messages: [{ role: "user", content: "Reply with OK." }]
});

console.log(res.choices[0].message.content);

Use /v1/messages for clients that expect Anthropic-style request bodies.

curl https://api.freetheai.xyz/v1/messages \
  -H "Authorization: Bearer $FREETHEAI_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "opc/deepseek-v4-flash-free",
    "max_tokens": 256,
    "messages": [
      { "role": "user", "content": "Give me a short implementation plan." }
    ]
  }'

Use /v1/models for normal clients. Use /v1/models/full when you need tier and catalog metadata for a UI. The full catalog is a site-key endpoint, so public catalog clients use Bearer freetheai.xyz.

curl https://api.freetheai.xyz/v1/models \
  -H "Authorization: Bearer $FREETHEAI_API_KEY"

curl "https://api.freetheai.xyz/v1/models/full" \
  -H "Authorization: Bearer freetheai.xyz"