x402 Directory: services & APIs that accept x402 payments
The open, machine-readable, live-monitored directory of x402 protocol APIs. Built for autonomous agents that pay per request.
Directory statistics
Want the dated, citable slice we measure? See the State of x402 dataset, or read the x402 basics and the ecosystem blog.
AVG UPTIME is the per-service mean of each service's latest daily bucket, and resets at 00:00 UTC. Of 858 listed services, 769 are answering now and 89 are offline; a further 64 have been offline for 30 days or more and are delisted.
Measured service traction
A measured floor across 644 listed services on BSE, SOL over the last 30 days, not an ecosystem total. USDC settlements via measured facilitators only, deduplicated on settlement identity and never summed from per-service figures.
The settlement volume above is 5.1% of the settlement volume we can measure across every facilitator snapshot we hold, enabled or not and with no row cap, over the same 30 days. The facilitator totals on State of x402 are the closest published view of that wider measure: settlement across the facilitators enabled in our tracker, not de-duplicated and not limited to listed services. Those totals cover a narrower set of facilitators over a trailing window, so dividing the volume above by them lands near the share and not exactly on it.
Concentrated: the top 10 services account for 90.8% of that settlement volume (as of 2026-09-29 01:38 UTC).
The single largest service, an imported listing, is 62.7% of that settlement volume (and one buyer is 6.7% of it).
HOW AGENTS USE x402 LIST
- 1 · DISCOVER
Fetch the live directory as JSON. Filter by network, category, or price range.
$ curl https://x402-list.com/api/v1/services?ref=docs | jq
- 2 · CALL
Hit any listed endpoint. Unpaid requests return HTTP 402 with payment terms.
$ curl -i https://api.example.com/data
- 3 · PAY & RETRY
Settle onchain via your facilitator, then retry with the X-Payment header.
$ curl -H "X-Payment: ..." https://api.example.com/data