# l402-kit

> Probe-verified (tier 2 of 3). Last checked 2026-08-23. 4 of 5 capability checks passed.

- host: shinydapps-bd9fa40b.mintlify.app
- url: https://shinydapps-bd9fa40b.mintlify.app/
- category: payments api
- type: documentation
- language: en

## Probe-verified · tier 2 of 3

Probed live on 2026-08-23 against rubric v1. 4 of 5 checks passed.

- PASS — Markdown negotiation
- PASS — Markdown twin at a predictable URL
- PASS — llms.txt
- fail — API catalog
- PASS — MCP server answers

MCP tools (from tools/list on 2026-08-23): search_l402_kit, query_docs_filesystem_l402_kit, submit_feedback

## Unverified actions

Read from the page's own content, with the wording each was drawn from. Inference is kept separate from tested facts; an agent completing the action is tier 3.

- **read** — "Fetch the complete documentation index" → `https://shinydapps-bd9fa40b.mintlify.site/llms.txt`
- **download** — "npm install l402-kit" → `https://npmjs.com/package/l402-kit`
- **download** — "pip install l402kit" → `https://pypi.org/project/l402kit`
- **download** — "Go SDK (net/http)" → `https://pkg.go.dev/github.com/shinydapps/l402-kit/go`
- **download** — "Rust SDK (axum)" → `https://crates.io/crates/l402kit`
- **read** — "Whitepaper Technical design" → `https://l402kit.com/docs/whitepaper`
- **read** — "Watch end-to-end demo" → `https://l402kit.com/#live-demo`

## Summary

l402-kit is open-source middleware implementing the L402 protocol for pay-per-call API monetization using Bitcoin Lightning Network.

## Context

199 sites in this index share the category "payments api"; 66 are transactional.

## How we grade

- tier 1 — **Declared**: The site says agents are welcome in its robots.txt. A permission, not a capability.
- tier 2 — **Probe-verified** (this site): We fetched the site and tested each signal ourselves. Dated, repeatable, re-checked on a schedule.
- tier 3 — **Behaviourally verified**: An agent completed the action end to end — booked, bought, submitted — and it worked.

## About this record

Known-Good probes sites live and publishes what was tested and when.
Method: https://knowngood.sh/about.md · Rubric: https://knowngood.sh/benchmark