LLM API

POST https://openapi.felo.ai/api/v1/decisions

import os
import requests

response = requests.post(
    "https://openapi.felo.ai/api/v1/decisions",
    headers={"Authorization": f"Bearer {os.environ['FELO_API_KEY']}"},
    json={
        "model": "jev-1.13",
        "state": "Help! My payouts have been failing for 3 days.",
        "questions": {
            "is_urgent": {
                "type": "noul",
                "instructions": "Does this message convey urgency?",
                "criteria": {"true": "Time-sensitive", "false": "No urgency"},
            },
            "department": {
                "type": "choice",
                "instructions": "Which team should handle this?",
                "criteria": {
                    "billing": "Payments, invoicing, refunds",
                    "technical": "Bugs, outages, integrations",
                    "sales": "Pricing, upgrades, new accounts",
                },
            },
            "frustration": {
                "type": "score",
                "instructions": "How frustrated is the customer?",
                "criteria": ["Calm", "Frustrated", "Very angry"],
            },
        },
    },
    timeout=60,
)
response.raise_for_status()
answers = response.json()["answers"]
print(answers["is_urgent"]["noul"])
print(answers["department"]["choice"], answers["department"]["probabilities"])
print(answers["frustration"]["score"])

Authorization: Bearer YOUR_API_KEY

X-API-Key: YOUR_API_KEY

https://openapi.felo.ai

curl "https://openapi.felo.ai/api/v1/models?exclude_video_and_decisions=true&provider=openrouter" \
  -H "Authorization: Bearer ${FELO_API_KEY}"
curl "https://openapi.felo.ai/api/v1/videos/models?provider=openrouter" \
  -H "Authorization: Bearer ${FELO_API_KEY}"
curl "https://openapi.felo.ai/api/v1/decisions/models?provider=openrouter" \
  -H "Authorization: Bearer ${FELO_API_KEY}"

export FELO_API_KEY="YOUR_API_KEY"

npm install openai

pip install openai

npm install @anthropic-ai/sdk

pip install anthropic

import OpenAI from "openai";

const openai = new OpenAI({
  apiKey: process.env.FELO_API_KEY,
  baseURL: "https://openapi.felo.ai/api/v1",
});

import os
from openai import OpenAI

openai = OpenAI(
    api_key=os.environ.get("FELO_API_KEY"),
    base_url="https://openapi.felo.ai/api/v1",
)

import Anthropic from "@anthropic-ai/sdk";

const anthropic = new Anthropic({
  apiKey: process.env.FELO_API_KEY,
  baseURL: "https://openapi.felo.ai/api",
});

import os
from anthropic import Anthropic

anthropic = Anthropic(
    api_key=os.environ.get("FELO_API_KEY"),
    base_url="https://openapi.felo.ai/api",
)

import OpenAI from "openai";

const client = new OpenAI({
  apiKey: process.env.FELO_API_KEY,
  baseURL: "https://openapi.felo.ai/api/v1",
});

const response = await client.responses.create({
  model: "gpt-5.6-sol",
  input: "Write a one-sentence bedtime story about a unicorn.",
});

console.log(response.output_text);

import os
from openai import OpenAI

client = OpenAI(
    api_key=os.environ.get("FELO_API_KEY"),
    base_url="https://openapi.felo.ai/api/v1",
)

response = client.responses.create(
    model="gpt-5.6-sol",
    input="Write a one-sentence bedtime story about a unicorn.",
)

print(response.output_text)

import OpenAI from "openai";

const client = new OpenAI({
  apiKey: process.env.FELO_API_KEY,
  baseURL: "https://openapi.felo.ai/api/v1",
});

const completion = await client.chat.completions.create({
  model: "gpt-5.6-sol",
  messages: [
    {
      role: "user",
      content: "Give me one sentence about why API compatibility matters.",
    },
  ],
});

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

import os
from openai import OpenAI

client = OpenAI(
    api_key=os.environ.get("FELO_API_KEY"),
    base_url="https://openapi.felo.ai/api/v1",
)

completion = client.chat.completions.create(
    model="gpt-5.6-sol",
    messages=[
        {
            "role": "user",
            "content": "Give me one sentence about why API compatibility matters.",
        }
    ],
)

print(completion.choices[0].message.content)

import Anthropic from "@anthropic-ai/sdk";

const client = new Anthropic({
  apiKey: process.env.FELO_API_KEY,
  baseURL: "https://openapi.felo.ai/api",
});

const message = await client.messages.create({
  model: "claude-sonnet-4-6",
  max_tokens: 128,
  messages: [
    {
      role: "user",
      content: "Summarize the value of direct model APIs in one sentence.",
    },
  ],
});

const text = message.content
  .filter((block) => block.type === "text")
  .map((block) => block.text)
  .join("");

console.log(text);

import os
from anthropic import Anthropic

client = Anthropic(
    api_key=os.environ.get("FELO_API_KEY"),
    base_url="https://openapi.felo.ai/api",
)

message = client.messages.create(
    model="claude-sonnet-4-6",
    max_tokens=128,
    messages=[
        {
            "role": "user",
            "content": "Summarize the value of direct model APIs in one sentence.",
        }
    ],
)

text = "".join(block.text for block in message.content if block.type == "text")
print(text)

POST https://openapi.felo.ai/api/v1/responses

const response = await client.responses.create({
  model: "gpt-5.6-sol",
  input: "Reply with exactly: responses ok",
});

console.log(response.output_text);

output_text

POST https://openapi.felo.ai/api/v1/chat/completions

const completion = await client.chat.completions.create({
  model: "gpt-5.6-sol",
  messages: [
    {
      role: "user",
      content: "Reply with exactly: chat completions ok",
    },
  ],
});

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

choices[0].message.content

POST https://openapi.felo.ai/api/v1/messages

const message = await client.messages.create({
  model: "claude-sonnet-4-6",
  max_tokens: 64,
  messages: [
    {
      role: "user",
      content: "Reply with exactly: messages ok",
    },
  ],
});

const text = message.content
  .filter((block) => block.type === "text")
  .map((block) => block.text)
  .join("");

console.log(text);

const message = await client.messages.create({
  model: "claude-sonnet-4-6",
  max_tokens: 64,
  messages: [
    {
      role: "user",
      content: [
        {
          type: "text",
          text: "Reply with exactly: messages ok",
        },
      ],
    },
  ],
});

content[].text

const stream = await client.responses.create({
  model: "gpt-5.6-sol",
  input: "Write one sentence.",
  stream: true,
});