Skip to content
x402 List logo

x402 List MCP server

Which MCP servers are x402 List's own, from the official registry and from asking its own domain, whether they answer, and what they offer. A program checked each of these, nobody copied them from a product page.

read 2026-10-27

← Back to x402 List

Whose server it is
  • Registry namecom.x402-list/x402-list-mcpverified in the MCP registry

The registry name sits under x402-list.com. The registry only lets a publisher use that namespace after proving control of the domain through DNS or HTTP.

When we asked itchecked 2026-10-27
  • Stateanswerschecked 2026-10-27
  • Tools7
  • Server calls itselfx402-list-mcp
  • Server version0.5.3
  • Protocol version2025-06-18

On 2026-10-27 the server answered initialize and tools/list without a sign-in. First answer in 585 ms.

Should an agent connect itNot proven either way yet
  • Its tools do every use case we checked: find APIs that accept x402 per-request payments; check which x402 services are answering now; compare x402 services by uptime and endpoint pricing.
  • Checked on 6 of the 7 days it takes to judge reliability.

Once connected

  • For "find APIs that accept x402 per-request payments", the likely first call is x402_search_services.
  • For "check which x402 services are answering now", the likely first call is x402_check_health.
  • For "compare x402 services by uptime and endpoint pricing", the likely first call is x402_search_services.

Said by rules from the measurements above. The likely first call is a model's pick from the tool list; read its description before relying on it.

Measured dailydaily checks: 6, the first on 2026-10-27
  • INITE MCP scoreafter a weeka score needs 7 daily checks: 6 so far
  • What an agent can do with it3 of 3 use cases
  • Use119 npm downloads a week26 GitHub stars
  • Answeredmeasuring6 of the 7 daily checks it takes to print a share
  • Median first answer562 ms
  • Space in an agent's context≈ 3,570 tokensthe definitions of all its tools (7), which an agent carries on every turn
  • Tool definitionsA · 98 of 100
  • Typed results0 of 7 toolsdeclared outputSchema: results come typed, read once
  • Parameters without a description: in 1 of 7

What an agent can do with it

  • can do · find APIs that accept x402 per-request payments
  • can do · check which x402 services are answering now
  • can do · compare x402 services by uptime and endpoint pricing

Each of the product's use cases, put to Jev against this server's tool list: can an agent do it with these tools?

Worth a look

None of the five warning signs in these definitions.

A program checks the server once a day: initialize and tools/list, no model. Tokens are the definitions' length at about four characters a token. The grade averages six checks of every tool's name, description, schema and annotations; it says how well the tools are described, not whether they work. The score weighs what was measured and nothing else: answering (25%), doing the product's job (25%), definitions (20%), context (10%), use (10%) and how readily a client connects (10%). A part that was not measured is left out, and a hidden instruction caps the score at 40. The state of vendors' MCP servers: method and numbers →

Tools it offers7 tools · read 2026-10-27
  • 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…

  • 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…

  • 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…

  • 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…

  • 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…

  • 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…

  • 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…

How to connect

Add the server to your MCP client config. Claude Desktop, Cursor and most other clients read this shape:

{
  "mcpServers": {
    "x402-list-mcp": {
      "type": "http",
      "url": "https://mcp.x402-list.com/mcp"
    }
  }
}

Add it

Claude Code, in a terminal

claude mcp add --transport http x402-list https://mcp.x402-list.com/mcp

Add to CursorAdd to VS Code

claude.ai, ChatGPT and other clients: add https://mcp.x402-list.com/mcp as a custom connector in the settings.

Also shipped through: npm

OpenAPI spec

26 paths, read 2026-10-27. Open the spec ↗

Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.