org.402mcp/registry

up checked 2026-11-11T11:38:16.052Z

Unclaimed · Unverified

Publisher-provided title

402MCP.org — HTTP 402 & Agent Payment Registry

Publisher-provided description

Decode HTTP 402 challenges (L402, x402, MPP) and choose agent payment rails from an open registry.

Summary by lookupd

Decodes HTTP 402 payment challenges, probes URLs for them, and searches and recommends agent payment solutions from a registry.

Install

Claude Code, remote (streamable-http)

claude mcp add --transport http registry https://402mcp.org/api/v1/mcp

Claude Code, npm package (stdio)

claude mcp add registry -- npx -y @402mcp/mcp

Codex, remote (streamable-http)

codex mcp add registry --url https://402mcp.org/api/v1/mcp

Codex, npm package (stdio)

codex mcp add registry -- npx -y @402mcp/mcp

Cursor, remote (streamable-http) → .cursor/mcp.json

{
  "mcpServers": {
    "registry": {
      "url": "https://402mcp.org/api/v1/mcp"
    }
  }
}

Cursor, npm package (stdio) → .cursor/mcp.json

{
  "mcpServers": {
    "registry": {
      "command": "npx",
      "args": [
        "-y",
        "@402mcp/mcp"
      ]
    }
  }
}

Other clients: docs. Or tell your agent: Set up lookupd for me: read https://lookupd.com/agent.md and follow it.

Publisher-provided text

decode_402_challenge Call this whenever an HTTP response has status 402, or carries a WWW-Authenticate (L402, LSAT or Payment) or PAYMENT-REQUIRED header. Identifies the payment sch
recommend_payment_rail Choose an HTTP 402 payment solution from requirements rather than from rank. Filters the registry by role (pay or charge), settlement asset, custody, infrastruc
search_402_solutions Search the 402MCP.org registry of HTTP 402 payment solutions (L402, x402, MPP). Free-text query plus filters; results come back in published rank order with sco
get_solution Return one solution in full: summary, advantages and trade-offs, the six criterion scores with rationale, install commands, verified code samples, sources, matu
get_scheme_reference Protocol reference for L402, x402 or MPP: challenge, credential and receipt headers, encodings, the request/response flow, an example, and links to the specific
probe_402_support Make one GET (or HEAD) request to a public URL and report whether it answers with an HTTP 402 payment challenge, which scheme, and the decoded terms. Redirects
get_best_payment_solution Return whichever solution currently holds rank 1 on 402MCP.org, with its full breakdown, install commands and code. Rank 1 is the highest composite score, not a

Shows this live status and links here; updates hourly.

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