Introducing x402radar
Introducing x402radar
Discovery and trust for the x402 economy. Curated, verified, and scored from real on-chain usage. Real services, real numbers, real activity.
x402 has been around for just over a year, but its recent adoption by the Linux Foundation marks a turning point. What started as an obscure HTTP status code is gradually becoming the payment layer for AI agents and the emerging agentic economy. APIs, data feeds, and agent tools are quietly enabling pay-per-call payments. As adoption grew, it became harder and harder to understand what was actually happening in the market. So I launched x402radar, a searchable map of the x402 ecosystem.
x402radar (x402radar.io) is a live directory and analytics layer for the x402 ecosystem. It tracks every service that accepts x402 and ranks them by real on-chain volume, along with a trust score computed from actual network activity.
The problem: a fast-growing ecosystem with no map
x402 revives HTTP's long-dormant "402 Payment Required" status code. It lets any API charge per request in stablecoins, settled on-chain, with no accounts, no API keys, and no OAuth. A server replies with a 402, the client, often an AI agent, signs a USDC payment, and gets its response. Coinbase and Cloudflare are behind it, and the "agents that pay for things" thesis has turned it into one of the most active corners of crypto × AI.
The catch: the ecosystem is growing, but it is still hard to see. If you're building an agent that needs to pay for a web search or LLM inference API, how do you find the options? How do you know which ones are real, reliable, and fairly priced versus dead endpoints or someone's weekend project?
What x402radar does
x402radar indexes the x402 ecosystem and makes it explorable:
A live directory of ~1,169 x402-enabled services across Base and Solana. Ranked by real on-chain volume, not vanity listings. We focus on what is actually being paid for. A trust score for each service, computed from real traffic signals such as uptime, success rate, latency, price, and observed on-chain demand. A public JSON API, so agents or your code can query the directory programmatically and route to the best, cheapest, or most reliable source at runtime.
What the data already shows
A few things stood out once the ecosystem was actually measurable:
- It's bigger than it looks. Over a thousand distinct services already live and taking payments.
- It's basically agent infrastructure. The category split is dominated by AI/agent tooling, led by LLM inference (~320 services), with on-chain data, AI media, and web search close behind.
- Recognizable names are arriving. Established providers like Nansen, Exa, and Chainlink agents sit alongside a large indie long tail.
- The money is still early. Top providers are doing tens of thousands of USDC per month, not millions. Real revenue, small numbers, wild growth rates. Supply is racing ahead but demand is an open question. Still, with over 2 million transactions over the last 30 days and 90k unique addresses using those services, something is clearly happening.
Who it's for
- Agent builders: discover and route to x402 services your agent can pay for, with trust signals instead of guesswork.
- Providers: get listed, get verified, and see how your service ranks based on real usage.
- Researchers and investors: track the shape and growth of the x402 economy as it forms.
Built on real traffic, not press releases
Everything on x402radar comes from observed on-chain activity. The trust score is a composite of uptime, success rate, latency, price, and demand, designed so an agent can make routing decisions it can actually defend. If we haven't seen enough data to score something, we say so rather than inventing a number.
What's next
This is an early, solo-built launch, and it will move fast. On the roadmap: deeper per-service analytics, more chains, richer API endpoints, and embeddable trust badges for providers.
If you run an x402 service, submit it. If you're building agents, query the API. And if you have feedback, what's missing, what would make it genuinely useful, I want to hear it.
Browse the ecosystem at x402radar.io.
— built by asuba