BlockRun

Pay-per-request access to AI models via x402 micropayments.

BlockRun is a unified API gateway that provides access to GPT-5.2, Claude 4, Gemini 2.5, and other frontier AI models with automatic USDC micropayments using the x402 protocol.

Why BlockRun?

No API Keys to Manage - Connect your wallet and start using AI models instantly
Pay Only for What You Use - Micropayments per request, no subscriptions or prepaid credits
Non-Custodial - Your private key never leaves your machine; payments are signed locally
OpenAI-Compatible API - Drop-in replacement for existing integrations
Multiple Providers - Access OpenAI, Anthropic, Google, DeepSeek, and more through one endpoint

How It Works

1. Send API request → 2. Receive 402 + price → 3. Sign payment locally → 4. Get AI response

The x402 protocol enables HTTP-native micropayments. When you make an API call:

BlockRun returns 402 Payment Required with the price
Your SDK signs a USDC payment authorization (EIP-3009)
The request is retried with the signed payment
BlockRun verifies, executes the AI call, and settles the payment on-chain

Your private key stays on your machine - it's only used to sign payments locally.

Quick Example

from blockrun_llm import LLMClient

client = LLMClient()  # Uses BLOCKRUN_WALLET_KEY env var
response = client.chat("openai/gpt-4o", "Hello!")
print(response)

import { LLMClient } from '@blockrun/llm';

const client = new LLMClient({ privateKey: '0x...' });
const response = await client.chat('openai/gpt-4o', 'Hello!');
console.log(response);

Supported Models

Provider	Models
OpenAI	GPT-5.2, GPT-4o, o1, o1-mini
Anthropic	Claude Opus 4, Claude Sonnet 4, Claude Haiku 4.5
Google	Gemini 3 Pro, Gemini 2.5 Pro, Gemini 2.5 Flash
DeepSeek	DeepSeek V3, DeepSeek R1
xAI	Grok 4 Fast
Meta	Llama 3.3 70B, Llama 3.1 405B
Qwen	Qwen 2.5 72B
Mistral	Mistral Large

Supported Networks

Network	Token	Status
Base	USDC	Live
Solana	USDC	Coming Soon