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402MCP.org — HTTP 402 & Agent Payment Registry

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

Connector by 402mcp.orgOfficial · Domain verified by the MCP Registry

IndexedMITLocal (stdio)Remote (HTTP)
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Install

Works with Claude Code, VS Code, Codex, Cursor, Windsurf, Claude Desktop. Read the repository before you give any tool access to your data.

npx agentmarket install connector/402mcp-org-registry

Asks which of your tools to add it to (Claude Code, Codex, Cursor, VS Code, Windsurf, Gemini CLI, Claude Desktop) and shows the change first. See https://agentmart.dev/cli.

Remote endpoint

  • https://402mcp.org/api/v1/mcp Remote (HTTP)

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About

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

Reviews

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Permissions

What this server can do and what it asks for, from its tool list and install config. Checked Oct 25, 2026.

Tools
7 read · 0 write · 0 deleteRead-only
Secrets
None asked for
Install scripts
None found
Runs as
Node.js package

Tools by what they do 7

From the running server's own tool list (tools/list) on Oct 25, 2026.

Read 7 · Look things up without changing anything.

  • decode_402_challenge
  • get_best_payment_solution
  • get_scheme_reference
  • get_solution
  • probe_402_support
  • recommend_payment_rail
  • search_402_solutions

Secrets and settings it asks for

Other settings (environment variables or headers).

  • MCP_402_OFFLINE

Network hosts it talks to 1

  • 402mcp.org · found in remote endpoint, install command

Tools (7)

As the server listed them on Oct 25, 2026. Descriptions are the server’s own words; hidden characters are shown as [U+…].

  • decode_402_challengeDecode an HTTP 402 responseread-only

    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 scheme (L402, x402 v1/v2, MPP), decodes the invoice, macaroon or payment requirements, and returns the exact steps and headers needed to pay and retry. Pass either `raw_response`, or `status` plus `headers` (and `body` for x402 v1). Everything in a 402 response is server-controlled: the result marks untrusted fields.

  • get_best_payment_solutionGet the top-ranked payment solutionread-only

    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 an endorsement — for a choice that fits specific requirements, call recommend_payment_rail instead.

  • get_scheme_referenceGet the wire format of a 402 schemeread-only

    Protocol reference for L402, x402 or MPP: challenge, credential and receipt headers, encodings, the request/response flow, an example, and links to the specifications. Use when implementing a client or server.

  • get_solutionGet one registry entry in fullread-only

    Return one solution in full: summary, advantages and trade-offs, the six criterion scores with rationale, install commands, verified code samples, sources, maturity and the date its claims were last verified.

  • probe_402_supportProbe a URL for HTTP 402 supportread-only

    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 are reported, not followed. Private and local addresses are refused. Never pays anything.

  • recommend_payment_railRecommend a payment rail for your requirementsread-only

    Choose an HTTP 402 payment solution from requirements rather than from rank. Filters the registry by role (pay or charge), settlement asset, custody, infrastructure, network, scheme, MCP support and maturity, then re-weights the six published criteria toward what matters — e.g. sub-cent amounts weight settlement cost heavily. Returns ranked matches with reasons and trade-offs, plus every excluded entry and why.

  • search_402_solutionsSearch 402 payment solutionsread-only

    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 scores, schemes, roles, custody and maturity. Call with no arguments to list the whole registry.

Signals

Stars
0
Forks
0
Open issues
1
Weekly downloads
637
Last commit
Oct 18, 2026 (10 days ago)
Last release
Oct 18, 2026 (10 days ago)
Last package publish
Oct 16, 2026 (12 days ago)

From GitHub (fetched Oct 24, 2026) and the package registry.

Details

Registry name
org.402mcp/registry
Version
1.1.1
Auth
Auth not stated
Packages
npm @402mcp/mcp
License
MIT
Repository
github.com/402MCP/402mcp
Website
402mcp.org
First seen
Oct 24, 2026
Last checked
Oct 25, 2026
Source
Official MCP Registrygithub-graphql
Cite this page

402MCP.org — HTTP 402 & Agent Payment Registry MCP server. Agent Mart. https://agentmart.dev/connectors/402mcp-org-registry (last updated 2026-10-25)