For developers

One key.
Every model.

Keep the SDK you already use. Change the base URL and the model name, and you are on HFAI Cloud.

01 / DROP-IN COMPATIBILITY

Drop-in compatibility.

The same request and response shape
your clients already speak.

Keep the SDK you already use. Change the base URL and the model name.

HFAI Cloud serves POST /v1/chat/completions and GET /v1/models in the OpenAI chat-completions shape, streaming included. Every OpenAI-compatible SDK, client and harness works by changing two strings: the base URL, https://api.heartflowai.net/v1, and the key, hfai_live_….

Switching models is one edit inside the request body — the model string. There is no per-model SDK, no second account and no second balance to top up when you move on.

02 / EXAMPLES

curl, Python
and JavaScript

Three complete calls against
https://api.heartflowai.net/v1.

CURL

curl https://api.heartflowai.net/v1/chat/completions \
  -H "Authorization: Bearer hfai_live_…" \
  -H "Content-Type: application/json" \
  -d '{"model":"deepseek-v4-pro","messages":[{"role":"user","content":"Hello HFAI"}]}'

PYTHON

# pip install openai
from openai import OpenAI

client = OpenAI(
    base_url="https://api.heartflowai.net/v1",
    api_key="hfai_live_…",
)

response = client.chat.completions.create(
    model="deepseek-v4-pro",
    messages=[{"role": "user", "content": "Hello HFAI"}],
)

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

JAVASCRIPT

// npm install openai
import OpenAI from "openai";

const client = new OpenAI({
  baseURL: "https://api.heartflowai.net/v1",
  apiKey: "hfai_live_…",
});

const response = await client.chat.completions.create({
  model: "deepseek-v4-pro",
  messages: [{ role: "user", content: "Hello HFAI" }],
});

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

Replace hfai_live_… with a key from HFAI Cloud and deepseek-v4-pro with any model id from https://api.heartflowai.net/v1/models.

03 / CODING AGENTS

Use it from your coding agent.

An OpenAI-compatible endpoint
for the tools you already run.

Agent tools and editors that accept a custom OpenAI-compatible provider take the same two values: the base URL https://api.heartflowai.net/v1 and an hfai_live_… key. Add them as a new provider alongside the built-in ones, choose a model from the catalogue, and the agent runs on your HFAI Cloud balance. Nothing else in the tool’s configuration changes, and no provider-specific integration is needed per model.

04 / WHAT YOU GET

What you get

One endpoint for every model
in the catalogue.

One balance. Credits bought once with $HFAI at a USD peg and drawn down as you call models.
One key. A single hfai_live_… key works for every model, in every client.
No markup on inference. You pay the model’s list price — no tiers, no discounts, nothing added on top when you buy credits.
Prepaid credits. No subscription, no per-seat licence, no monthly minimum.
The same endpoint for every model. Switching models is changing one string in the request body.

ONE KEY · EVERY MODEL

Change two strings.
Keep your stack.

Connect wallet Read the docs

One key.Every model.