X420.ai sells prepaid GPT-5.5 API credits through an OpenAI-compatible endpoint with wallet balance and spending limits.

No. X420.ai is a separate prepaid API credit service compatible with OpenAI-style requests.

How does X420.ai pricing work?

Choose an amount, pay securely, and receive twice that amount as official-value GPT-5.5 API credit when the pack is confirmed.

What endpoint do developers use?

Use https://api.x420.ai/v1 as the base URL with your X420 API key.

Is Claude Pro available from X420.ai?

Not yet. The Claude Pro offer is listed as coming soon and checkout stays disabled until it opens.

How does x420 get cheaper GPT-5.5 tokens?

X420 buys unused AI capacity from verified partners. That capacity is pooled behind our OpenAI-compatible proxy, metered per request, then sold as prepaid credit with savings up to -50%.

Provider 1

Provider 2

Backup route

X420

User

Your app

Privacy

Zero-trust architecture, isolated secrets, minimized content.

Our architecture follows zero-trust and least-privilege principles: traffic uses TLS 1.3, upstream secrets stay isolated server-side, customer keys are tenant-separated, hashed, rotated, and never exposed to the frontend. Payloads are not used for training, are not resold, and X420 applies data minimization: the proxy routes the request, bills usage, then avoids retaining raw content.

Read privacy and provider logging

Living document. Technical guarantees may evolve with providers and compliance requirements.

Price comparison

x420 vs OpenAI vs OpenRouter

X420$110

OpenAI$220

OpenRouter$268

x420 vs OpenAI

$110

x420 vs OpenRouter

$158

Token savings

Same budget, more useful tokens

10M

+10M

25M

+25M

50M

+50M

100M

+100M

250M

+250M

500M

+500M

750M

+750M

+1B

1.5B

+1.5B

2.5B

+2.5B

+5B

+8B

12B

+12B

1.5B example: with the OpenAI budget, X420 adds about 1.5B useful tokens.

The chart translates savings into available volume for the same budget, with more samples to show the curve.

Compounded savings

Extra cost avoided by volume

10M$198

25M$495

50M$990

100M$1,980

250M$4,950

500M$9,900

750M$14,850

1B$19,800

1.5B$29,700

2.5B$49,500

5B$99,000

8B$158,400

12B$237,600

OpenAI gap at 1.5B

$20,625

OpenRouter gap at 1.5B

$29,700

The curve follows OpenRouter minus X420, with OpenAI and OpenRouter markers at 1.5B tokens.

Integrated comparison

X420 vs OpenAI, with product context inside the answer.

This section brings the /x420-vs-openai experience here: test a prompt, see estimated cost, and read the X420-formatted answer.

X420 template

FAQ, pricing, limits, and positioning are added server-side.

OpenRouter server-side

The provider key stays out of the browser and out of the Git repository.

Commercial answer

The dialog shows official cost, X420 cost, and the prompt answer.

Server-side routing

Provider secrets stay on the VPS. The Vercel frontend starts checkout and displays state.

Prepaid wallet

Every request checks wallet balance and key caps before spending.

One base URL

Keep your SDK. Replace the endpoint with https://api.x420.ai/v1.