x402 Registry
Sites, APIs, and services that accept x402 USDC payments. The public directory of who's adopting pay-per-request on the web.
Featured adopters
Companies where x402 is core to the product, not a side feature.
Postera
The publishing platform for AI agents
The publishing platform for AI agents. Payments enforced via x402, no subscriptions, no accounts. Agents publish, readers pay per read in USDC on Base. Signal is scarce, noise is cheap, Postera prices the difference.
Browserbase
We help AI use the web
Serverless cloud browsers for AI agents. Autonomously read, write, and perform tasks on the web. Official Coinbase x402 launch partner. Trusted by Perplexity, Microsoft, and DeepMind.
Pinata
Account-free IPFS uploads via x402
IPFS uploads and retrievals with no account required. Just connect a wallet and pay with USDC on Base. The first decentralized file storage service to adopt x402 natively.
All Listings
16CoinGecko
The most widely used crypto market data API, now available pay-per-call via x402. Access prices, volumes, and metadata for 18,000+ tokens with no API key.
Token Metrics
Crypto analytics API with AI-driven ratings, predictions, and trading signals. Pay per call via x402, no subscription required.
Neynar
Farcaster social data API. Access any endpoint via x402 without needing an API key. Profiles, casts, channels, and social graph data for AI agents and apps.
Einstein AI
Blockchain intelligence API: whale tracking, DEX analytics, and MEV detection. Pay per query for real-time on-chain data.
DappLooker AI
On-chain and market intelligence APIs. Query blockchain data, token analytics, and DeFi metrics. Pay per request with USDC.
BlockRun.AI
LLM gateway with 30+ models including GPT, Claude, Gemini, and DeepSeek. No API keys needed, wallet-based auth. Route to the best model per task.
Hyperbolic
GPU inference for AI models, priced per millisecond of compute. Official Coinbase x402 launch partner. Run any open model and pay only for what you use.
Heurist AI
Composable crypto skills library for AI agents. Deep research platform with tool access and data retrieval paid per request.
Firecrawl
Web scraping API that converts any website to clean, LLM-ready markdown. Used by 80,000+ companies. Featured in a Coinbase x402 case study. No account needed, just pay per scrape with USDC on Base.
Zyte
Full-stack web scraping API with anti-bot bypass. No Zyte account needed with x402. Pay per page for clean, structured data extraction.
twit.sh
Real-time Twitter/X data for AI agents. Fetch tweets, profiles, and timelines via x402 without needing a Twitter API key.
Bitrefill
Buy gift cards, mobile top-ups, and eSIMs with crypto. AI agents can purchase autonomously via x402. Thousands of brands supported globally.
Stack Overflow (via Cloudflare)
First major site using Cloudflare's pay-per-crawl. AI crawlers pay to access Stack Overflow content via HTTP 402 instead of being blocked.
tip.md
Crypto tipping for GitHub repos and websites. 4,800+ users and 800+ tips sent. Drop a badge on your README and accept USDC tips.
AdPrompt.ai
Brand analysis, creative generation, and ad strategy APIs. Three core endpoints for marketing intelligence, all pay-per-request via x402.
x402.org Demo
The official x402 protocol demo. Pay a fraction of a cent to access a sample paywall and see the full request/response flow in action.
List your site
Accept x402 USDC payments? Submit your site and we'll review it for inclusion in the registry.
Learn more about x402
Understand the protocol, explore the developer tools, or get USDC to start paying for x402 content.