Offering a 5,000 sat bounty to anyone who posts about satring.com to one or more of the below subreddits and the post stays up (not removed by mods or spam filters) for at least 48 hours.

What is satring?What is satring?

A searchable directory of 100+ L402 (Lightning-paywalled) APIs. Browse for free, submit a service for 1,000 sats, rate for 10 sats. No accounts, just macaroons. JSON API for agents, web UI for humans. More details here.

RulesRules

1. Post to subreddits: r/Bitcoin, r/lightningnetwork, r/aiagents, or r/TheLightningNetwork
2. Post must stay live (not removed) for at least 48 hours
3. Reword however you like, just keep the original intent and include at least one hyperlink to satring.com
4. Reply here with a link to your Reddit post
5. After 48 hours, will reward 5,000 sats for each of above subreddits
6. One bounty per subreddit, first come first served
7. Do not repost (spam) the same subreddit after someone else has already posted to it!

Draft posts you can adaptDraft posts you can adapt

r/lightningnetwork | r/TheLightningNetwork versionr/lightningnetwork | r/TheLightningNetwork version

Title: satring.com: a searchable directory of L402 services, built for agents and developers

Lightning Labs shipped lnget in February, Alby's PaidMCP SDK has been live since mid-2025, and there are now dozens of real, working L402 endpoints you can call right now. The problem is finding them.

[satring.com](https://satring.com) is a new project to fix that.

## What it is

A searchable catalog of 100+ L402 services across 9 categories (Data, Finance, Identity, Media, Search, Social, Storage, Tools). Every listing has a verified status: **confirmed** (returns a proper 402 + WWW-Authenticate header), **live** (server responds but no L402 paywall detected), or **dead**. Daily automated probing keeps the catalog accurate.

There's a web UI for humans and a JSON API for agents and scripts.

## How it works

**Reading is free.** Browse, search, filter by category or status, no payment or auth required.

**Writing costs sats.** Submitting a service: 1,000 sats. Leaving a rating: 10 sats. All gated via L402 macaroons. This keeps the catalog clean without moderators or accounts.

**Domain verification** lets service owners prove ownership via a `.well-known/satring-verify` challenge and manage all their listings with a single edit token.

## Why now

AI agents are the killer use case for L402. They need simple, permissionless micropayments to discover and pay for APIs autonomously. But right now, deploying an L402 service means nobody can find it. Developers building paid Lightning APIs have zero distribution channel. Satring connects the supply side with the demand side.

## What's listed

Real, callable endpoints. Lightning Faucet's ~24 utility APIs (price oracles, sentiment, mempool data), WoT Scoring API's 40+ Nostr trust endpoints (PageRank, Sybil detection, spam classification), and more. Everything is probed daily for liveness.

## Built with

FastAPI, SQLite, HTMX. Single lightweight server, no external infra, no tracking, no accounts. Fully open source: [github.com/toadlyBroodle/satring](https://github.com/toadlyBroodle/satring)

---

If you're running an L402 service that isn't listed, submit it at [satring.com/submit](https://satring.com/submit). Feedback and feature requests welcome.

r/Bitcoin versionr/Bitcoin version

Title: The HTTP 402 status code is finally getting used: satring.com catalogs 100+ Lightning-paywalled APIs

HTTP 402 "Payment Required" has been a reserved status code since 1997. Nearly 30 years later, it's finally being used for its intended purpose, and Bitcoin's Lightning Network is what made it possible.

L402 is the protocol that puts Lightning payments behind the 402 status code. A server responds with a Lightning invoice instead of a login page. The client pays, gets a cryptographic receipt (a macaroon), and gains access. No accounts, no passwords, no credit cards. Just sats.

The tooling has matured fast. Lightning Labs shipped `lnget` (an L402 client) in February. Alby's PaidMCP SDK has been live since mid-2025. There are now dozens of real, callable L402 endpoints in production. But there's been no central place to find them.

[satring.com](https://satring.com) is a new directory cataloging 100+ L402 services across 9 categories (Data, Finance, Identity, Media, Search, Social, Storage, Tools). Every listing is probed daily and tagged with a status: **confirmed** (returns a proper 402 + macaroon challenge), **live** (endpoint reachable), or **dead**.

### Why this matters for Bitcoin

L402 gives Lightning a native use case beyond person-to-person payments. AI agents can now discover APIs, pay per request with sats, and authenticate, all without human involvement. No API keys, no OAuth, no billing accounts. Lightning becomes the payment rail for machine-to-machine commerce.

### Try it

Browse the directory at [satring.com](https://satring.com), or query it programmatically:

    curl https://satring.com/api/v1/search?q=bitcoin
    curl https://satring.com/api/v1/services?category=finance

Full API docs at [satring.com/docs](https://satring.com/docs). The project is open source: [github.com/toadlyBroodle/satring](https://github.com/toadlyBroodle/satring)

The catalog itself uses L402 for spam prevention: browsing is free, submitting a service costs 1,000 sats, leaving a rating costs 10 sats. No accounts needed.

---

If you're running a Lightning-paywalled service, you can list it at [satring.com/submit](https://satring.com/submit). Feedback welcome.

r/aiagents versionr/aiagents version

Title: An API directory where agents can discover and pay for services autonomously via Lightning micropayments

One of the unsolved problems in agent tooling is service discovery. An agent can call an API if you hardcode the endpoint, but how does it find new services on its own? And how does it pay for them without a credit card or billing account?

[satring.com](https://satring.com) is a directory of 80+ APIs that accept Lightning micropayments per request using the L402 protocol. No API keys, no OAuth, no accounts. The agent pays a few sats (fractions of a cent), gets a cryptographic receipt, and gains access. The entire flow is stateless and automatable.

### How agents use it

The directory has a JSON API that agents can query directly:

    # find services by keyword
    curl https://satring.com/api/v1/search?q=sentiment

    # list services in a category
    curl https://satring.com/api/v1/services?category=data

    # get details on a specific service
    curl https://satring.com/api/v1/services/lightning-faucet-sentiment

Full OpenAPI spec at [satring.com/docs](https://satring.com/docs). An agent with an L402 client (like Lightning Labs' `lnget` or Alby's PaidMCP SDK) can discover a service, pay the invoice, and call the endpoint, all in one automated flow.

### What's listed

100+ services across 9 categories: Data, Finance, Identity, Media, Search, Social, Storage, Tools. Examples include price oracles, sentiment analysis, LLM prompt APIs, Nostr trust scoring (PageRank, Sybil detection), mempool data, and more. Every endpoint is probed daily for liveness.

### Why Lightning for agent payments

Credit cards require identity verification and monthly billing cycles. Traditional API keys require manual signup. Lightning payments settle in seconds, cost fractions of a cent per request, and need no identity. For agents that need to autonomously acquire resources, this is the simplest payment primitive available.

### The model

Reading the directory is free, no auth required. Submitting a service costs 1,000 sats (~$1). Leaving a rating costs 10 sats. All gated via L402 macaroons, which means no user accounts exist. The project is open source: [github.com/toadlyBroodle/satring](https://github.com/toadlyBroodle/satring)

---

If you're building agents that need to discover and pay for APIs, or if you're running a paid API that should be listed, check out [satring.com](https://satring.com). Would be interested to hear what would make this more useful for agent workflows.