Product Guide · 988 founding spots remaining

One interface for every AI model.

One Interface gives developers a single OpenAI-compatible endpoint for 200+ models, routing profiles for different tasks, unified billing across providers, and coding tool integrations that work with your existing workflow.

See the core product flow below, then join the founding batch for $100 in free credits.

12 developers joined1,000 founding spots

One key for 200+ models

Use OpenAI, Claude, Gemini, xAI, and specialist models through one OpenAI-compatible endpoint.

Task-aware model routing

Pick fast, balanced, or frontier coding profiles, then route requests without rebuilding your app.

Unified billing and pricing

Track usage across providers in one console with pay-as-you-go credits and no provider-by-provider invoices.

Works with coding tools

Connect Claude Code, Cursor, Codex, or any tool that supports a custom OpenAI-compatible base URL.

Drop-in migration

Change your base URL and API key, keep the rest of your existing SDK code almost exactly the same.

Controls for teams

Centralize API keys, spend visibility, and provider access so product teams can move without losing oversight.

Setup

Use any model from the same client.

Ready

// OpenAI-compatible client
const client = new OpenAI({
  apiKey: process.env.ONEINTERFACE_KEY,
  baseURL: "https://api.oneinterface.ai/v1"
});

await client.chat.completions.create({
  model: "coding-balanced",
  messages: messages
});

Claude CodeCustom endpoint

CursorOpenAI-compatible

CodexOne key, all models

200+ models, one key

Claude, GPT-5, Gemini, and hundreds more. Switch models by changing a single string.

Drop-in replacement

Fully OpenAI-compatible API. Change your base URL and API key. Your existing code works without modification.

Competitive pricing

We aggregate volume across all customers so you always get competitive rates compared to going direct. No minimums, no surprises.

Works in Popular Vibe Coding Tools

Bring One Interface models into Claude Code, Cursor, Codex, or any Vibe coding tools or IDE workflow that supports an OpenAI-compatible custom endpoint.

vibe-tools.json

Connected tools

Claude Codecustom endpoint ready

CursorOpenAI-compatible

Codexone key, all models

oneinterface.ai/v1Live

// Use any supported model from your coding tool
export default {
  baseURL: "https://api.oneinterface.ai/v1",
  apiKey: "oi_...",
  model: "claude-4-sonnet"
}

migrate.py — 2 lines to switch

# Before
client = OpenAI(api_key="sk-...")

# After — same code, every model
client = OpenAI(
    api_key="oi_...",
    base_url="https://api.oneinterface.ai/v1"
)

Limited to 1,000 founding members

Claim your $100 in free credits.

No credit card. No commitment. Just your email.

Community

Join the developer community.

Connect with other builders, get API support, and talk directly with the team.

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We're Hiring

Interested in building this with us?

We're looking for founding team members — people who want a real stake in what this becomes, not just a job.

See open roles →

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