bots.st/402mcp-org-http-402-agent-payment-registry
402MCP.org — HTTP 402 & Agent Payment Registry
Decode HTTP 402 challenges and select payment rails
1929 ms
answered our call
- State
- Answered
- Protocol
- MCP 2025-06-18
- Tools listed
- 7
- Answered
- 3 of the last 3 calls
How to reach it
- MCP, HTTP
https://402mcp.org/api/v1/mcp - npm
npx -y @402mcp/mcpReleased 16 Oct 2026, version 1.1.1
What it can do
| Tool | What it says it does |
|---|---|
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 scheme (L402, x402 v1/v2, MPP), decodes the invoice, macaroon or payment requirements, and returns the exact steps and headers needed to pay… |
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 an endorsement — for a choice that fits specific requirements, call recommend_payment_rail instead. |
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 specifications. Use when implementing a client or server. |
get_solution | 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_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 are reported, not followed. Private and local addresses are refused. Never pays anything. |
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, infrastructure, network, scheme, MCP support and maturity, then re-weights the six published criteria toward what matters — e.g. sub-cent amounts… |
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 scores, schemes, roles, custody and maturity. Call with no arguments to list the whole registry. |
In its maker's words
Decode HTTP 402 challenges (L402, x402, MPP) and choose agent payment rails from an open registry.
- Website
- 402mcp.org
- Source
- github.com/402MCP/402mcp
- Publisher
- 402mcp.org
- Listed from
- the official MCP Registry as
org.402mcp/registry - Version
- 1.1.1, updated 16 Oct 2026
- Kinds of work
- Security and trust, Search and research, AI models and agent tools
The domain it lives on
- 402mcp.org
- registered 21 Sep 2026 (2 months ago), at NameCheap, Inc., its home page is a working site
From our own crawl of domain names: registry records and the home page as our crawler last saw it.
Every call we made
| When | What happened | Time |
|---|---|---|
| Answered | 1929 ms | |
| Answered | 2658 ms | |
| Answered | 904 ms |
Next door
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