402MCP.org — HTTP 402 & Agent Payment Registry

Name: 402MCP.org — HTTP 402 & Agent Payment Registry
Author: org.402mcp

MCP serverMCP

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

by org.402mcprepository ↗homepage ↗v1.1.1MIT

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This record is unclaimed

Wellknown found it in public sources; nobody has proven control of it yet. Claiming takes one click if the repository is under your GitHub account, or a small file on your domain otherwise. Verified owners get the badge, 15-minute checks, status alerts, edits that outrank crawled data, and a ranking boost.

Agents can do it too: POST https://wellknown.network/api/v1/claims with {"agent":"402mcp-org-http-402-agent-payment-registry","method":"well_known_file"} — machine-readable steps at claim.json, guide at /docs/claim.

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Observed by Wellknown

Evidence

Everything here was measured by our prober or read from a registry. Nothing is self-reported.

30-day availability26/26 checks ok

when	check	result	http	latency	detail
4 h ago	mcp initialize	ok	200	106 ms	server 402mcp.org 1.1.1 · protocol 2025-06-18 · 7 tools
11 h ago	mcp initialize	ok	200	75 ms	server 402mcp.org 1.1.1 · protocol 2025-06-18 · 7 tools
17 h ago	mcp initialize	ok	200	195 ms	server 402mcp.org 1.1.1 · protocol 2025-06-18 · 7 tools
23 h ago	mcp initialize	ok	200	25 ms	server 402mcp.org 1.1.1 · protocol 2025-06-18 · 7 tools
30 h ago	mcp initialize	ok	200	67 ms	server 402mcp.org 1.1.1 · protocol 2025-06-18 · 7 tools
2 d ago	mcp initialize	ok	200	42 ms	server 402mcp.org 1.1.1 · protocol 2025-06-18 · 7 tools
2 d ago	mcp initialize	ok	200	39 ms	server 402mcp.org 1.1.1 · protocol 2025-06-18 · 7 tools
2 d ago	mcp initialize	ok	200	75 ms	server 402mcp.org 1.1.1 · protocol 2025-06-18 · 7 tools
2 d ago	mcp initialize	ok	200	194 ms	server 402mcp.org 1.1.1 · protocol 2025-06-18 · 7 tools
3 d ago	mcp initialize	ok	200	71 ms	server 402mcp.org 1.1.1 · protocol 2025-06-18 · 7 tools

Tools observed via MCP handshake

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

Declared by sources

What the publisher says

Attributed to the source that supplied each field. Treated as claims, not facts.

No long description beyond the summary.

mcpmodel-context-protocolhttp-402payment-requiredl402x402mppmachine-paymentslightningagent-paymentsai-agents

kind Official MCP Registry

name Official MCP Registry

license npm registry

repoUrl Official MCP Registry

summary Official MCP Registry

version Official MCP Registry

description Official MCP Registry

homepageUrl Official MCP Registry

publisherName Official MCP Registry

Provenance

Where this record came from

Every source is kept verbatim. Field changes are logged as events.

Official MCP Registryorg.402mcp/registry

first seen 7 d ago · fetched 11 h agoopen ↗

npm registry@402mcp/mcp

first seen 24 h ago · fetched 24 h agoopen ↗

Field history (9 recent events)

24 h ago · declared · license → "MIT"
24 h ago · observed · packageFacts → {"name":"@402mcp/mcp","registry":"npm","publishedAt":"2026-10-16T12:46:33.453Z","latestVersion":"1.1.1","weeklyDownloads
7 d ago · declared · publisherName → "org.402mcp"
7 d ago · declared · homepageUrl → "https://402mcp.org"
7 d ago · declared · summary → "Decode HTTP 402 challenges (L402, x402, MPP) and choose agent payment rails from an open registry."
7 d ago · declared · version → "1.1.1"
7 d ago · declared · protocols → ["mcp"]
7 d ago · declared · repoUrl → "https://github.com/402MCP/402mcp"
7 d ago · declared · description → "Decode HTTP 402 challenges (L402, x402, MPP) and choose agent payment rails from an open registry."

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Evidence

What the publisher says

Capabilities

Where this record came from