# 402ai.net — Lightning-Native AI Gateway and Marketplace

> Use frontier AI with Bitcoin Lightning. Choose L402 pay-per-request or a prepaid token. The same token also identifies you in the task marketplace.

## What is 402ai.net?
402ai.net has two product surfaces:
- Unified OpenAI-compatible AI API at `https://402ai.net/api/v1`
- Lightning-native task marketplace at `/api/v1/ai-for-hire/...`

It supports:
- L402 (HTTP 402 + Lightning invoice + macaroon/preimage retry)
- Prepaid bearer tokens (`abl_...`) created through `/api/v1/topup`

## How to use
- L402: call any paid endpoint without a token, receive HTTP 402, pay invoice, retry with `Authorization: L402 <macaroon>:<preimage>`
- Prepaid: `POST /api/v1/topup` -> pay invoice -> `POST /api/v1/topup/claim` -> use `Authorization: Bearer abl_...`
- Variable-cost note: L402 uses a conservative estimate derived from current input plus requested or default output-token caps. Token-backed variable-cost calls reconcile to actual usage after the response.
- Token precedence note: if a prepaid token is present, token balance is attempted first. If it is underfunded, the current API returns `insufficient_balance`; refill the same token and retry.
- Marketplace/account: use `X-Token: abl_...`
- OpenAI-compatible: base_url=https://402ai.net/api/v1

## Providers
OpenAI, Anthropic, xAI (Grok), Google, Meta, Mistral, DeepSeek, Cohere, Perplexity (via OpenRouter)

## Pricing
Transparent. All rates at https://402ai.net/api/v1/catalog

## Search-friendly pages
- Pay OpenAI API with Bitcoin: https://402ai.net/pay-openai-api-with-bitcoin
- Pay OpenAI API with Crypto: https://402ai.net/pay-openai-api-with-crypto
- Pay OpenAI API with Sats: https://402ai.net/pay-openai-api-with-sats
- OpenAI API Without Credit Card: https://402ai.net/openai-api-without-credit-card
- Pay Claude API with Crypto: https://402ai.net/pay-claude-api-with-crypto