Find and vet x402 payment APIs before your agent pays one: uptime, price, on-chain volume.
| Endpoint | https://mcp.x402-list.com/mcp (streamable-http) |
|---|---|
| Registry version | 0.5.3 |
| Now | 7 tools · grade B (81) · pin ts_62400c612338c5f8bd4756e5ca06513d · protocol 2025-06-18 |
| First / last listed | 2026-10-26 00:41 UTC / 2026-10-26 00:41 UTC |
| Grade over time | 2026-10-26: B (81), 7 tools |
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Tools: x402_search_services x402_get_service x402_find_best_service x402_check_health x402_facilitator_volumes x402_assess_services x402_change_events
x402_search_services | Your first call when you do not know which x402 service exists for a job: it narrows the directory of listed services to candidates. Filter by free-text query, category, network, live status, and whether the last observed 402 envelope is signable by a standard x402 client; sort by newest, uptime, cheapest, or endpoints. Returns up to 100 compact summaries a page: price in decimal USD, uptime, stat params: q, category, network, status, verified_only, signable, sort, fields, page, per_page |
x402_get_service | Call this once you hold a slug and are deciding whether to commit to that service: the full record behind a directory row. Live status, uptime over 24h/7d/30d/90d, average response time, networks and settlement asset, every priced endpoint, and the assessment block. When the live 402 of an endpoint asks to be paid at a different address than the listed pay_to and the change is still in review, the params: slug*, include_series |
x402_find_best_service | Call this when you have a need in words and want one service to call rather than a list to read: it is the free ranking step between searching and paying. Pass the need as q, plus any category, network, price cap or verification requirement, and get up to 20 ranked recommendations with the basis each one placed on. Ranking is mostly per-service reliability (live status, verification, uptime, respo params: category, network, q, max_price_usd, require_verified, prefer, limit, include_facilitator_context |
x402_check_health | Call this before you send a payment, or right after a call unexpectedly failed: is this service up right now. With no slug, the directory snapshot: five status counts across the directory (include_services=true attaches every row). With a slug: that service's status, its 24h/7d/30d/90d uptime windows, response time, consecutive failures, daily snapshots. No money fields. params: slug, uptime_period, include_services |
x402_facilitator_volumes | Call this when the question is about the rail rather than the service: which x402 facilitator actually settles money, and how much. Returns on-chain-verified settlement volume and transaction counts per facilitator for today (UTC), 7d, 30d and all-time, plus a verification flag ('on-chain' once volume has been observed on-chain, else 'listed'), across more than 30 facilitators. Optional daily time params: timeframe, include_timeseries, include_chains, days, page, per_page |
x402_assess_services | Call this when the free signals have run out: you hold 2 to 8 finalists from x402_search_services or x402_find_best_service, their stored fields do not separate them for YOUR stated need, and choosing wrong costs more than a quarter. It buys one fresh AI assessment reasoned against your question, not a cached grade; reading an already-computed assessment stays free via x402_get_service. Price: a o params: question*, services*, payment_signature_b64, probe |
x402_change_events | Call this before you trust anything you cached about a service, and right after a payment failed for no obvious reason: the monitor's log of what moved under you. Returns payTo, price and 402-schema changes observed on listed services, most recent first, in exactly three event types (payto_changed, price_changed, schema_changed). Filter with service (the slug), type, and days (1 to 365, default 90 params: service, type, days, page, per_page |
Entries describe changes in tool definitions. They are not statements about a server, its quality or its author. The grade measures how the tool definitions fit model providers (token cost, schema compatibility, confusable names) as scored by the ToolFit engine at the time of the listing. JSON: append .json. Opt-out: how or hello@youraitools.co.