Cashu (ecash) for AI agents

Cashu services checked for whether an AI agent can use them: mints, wallets, MCP servers and APIs that take payment over NUT-24 (HTTP 402). YES = the source states it and, where there is a live endpoint, our free unpaid probe agrees. KINDA = partial, early or experimental. Every row quotes its source; services we could not verify are not listed.

56 Cashu services checked · verdict mix

41 YES14 KINDA1 NO

services listed

17 mints, 11 wallets and agent skills, 5 mcp servers, 15 apis and middleware, 7 tools, 1 specification

mints that answered a live info request

free GET /v1/info only; nothing was minted, melted or paid. Reachable is not an endorsement

checked

2026-10-18

every row links to its source page

Plain-English meanings (Cashu)

Cashu: An ecash system for Bitcoin: you deposit sats with a mint and get back bearer tokens you can send like a file. Fast and cheap, but you must trust the mint.
Mint: The server that issues and redeems Cashu ecash. It holds the bitcoin behind your tokens, so it is custodial: if it disappears or is hacked, your ecash can become worthless.
Ecash: A bearer token worth some sats: whoever holds it can spend it. Cashu ecash is backed by bitcoin that a mint holds.
Custodial: Someone else holds the money for you, and you depend on them to give it back.
NUT-24: The Cashu standard for paying over HTTP 402: the server answers 402 with an X-Cashu payment request, then the agent retries with a Cashu token in the X-Cashu header.
HTTP 402: “Payment Required”: a web status code a server sends when a request has to be paid for first.
AI agent: Software that takes actions for you, such as buying an API call, without a person clicking each step.

Showing 56 of 56 Cashu services

Verdict

Mints17

Servers that issue and redeem ecash. Every mint is custodial.

21Mint (21mint.me)↗custodialcashulightning

Live public Cashu mint: free GET https://21mint.me/v1/info returned HTTP 200, software Nutshell/0.21.0, 3 keysets (3 active, units msat/sat). Custodial; see custody. Reachable now is not an endorsement.

YES

Custody. Custodial: the operator holds the sats backing all outstanding ecash. Own page says 'Use at your own risk'. Operator beyond the 21Mint name UNVERIFIED. Limits from /v1/info: mint (NUT-04) bolt11/sat max 1000000; melt (NUT-05) bolt11/sat max 1000000. Contact methods published: nostr.

“This service is provided 'as is' without any warranties.”

source: 21mint.me/v1/info

last checked 2026-10-18

Coinos (mint.coinos.io)↗custodialcashulightning

Live public Cashu mint: free GET https://mint.coinos.io/v1/info returned HTTP 200, software Nutshell/0.21.0, 3 keysets (1 active, units sat). Custodial; see custody. Reachable now is not an endorsement.

YES

Custody. Custodial: the operator holds the sats backing all outstanding ecash. Operated under the coinos name (per /v1/info description). No warning text or limits published in /v1/info; large-balance risk is UNVERIFIED. Limits from /v1/info: mint (NUT-04) bolt11/sat no max stated; melt (NUT-05) bolt11/sat no max stated. Contact methods published: email, twitter, nostr.

“Coinos cashu mint”

source: mint.coinos.io/v1/info

last checked 2026-10-18

Kashu.me (kashu.me)↗custodialcashulightning

Live public Cashu mint: free GET https://kashu.me/v1/info returned HTTP 200, software Nutshell/0.21.0, 1 keysets (1 active, units sat). Custodial; see custody. Reachable now is not an endorsement.

YES

Custody. Custodial: the operator holds the sats backing all outstanding ecash. Own page: 'No accounts, no tracking, no middlemen.' Operator not named (UNVERIFIED); no custody warning published. Limits from /v1/info: mint (NUT-04) bolt11/sat max 100000; melt (NUT-05) bolt11/sat max 100000. Contact methods published: none.

“A Cashu mint by plebs, for plebs.”

source: kashu.me/v1/info

last checked 2026-10-18

Kinda Reckless Mint (cashu.boats)↗custodialcashulightning

Live public Cashu mint: free GET https://cashu.boats/v1/info returned HTTP 200, software Nutshell/0.21.0, 1 keysets (1 active, units sat). Custodial; see custody. Reachable now is not an endorsement.

YES

Custody. Custodial: the operator holds the sats backing all outstanding ecash. Own page: 'it may shutdown at anytime, without warning!' Do not hold balances. Limits from /v1/info: mint (NUT-04) bolt11/sat no max stated; melt (NUT-05) bolt11/sat no max stated. Contact methods published: email, nostr.

“Mint for family and friends of the administrator.”

source: cashu.boats/v1/info

last checked 2026-10-18

LNpay Mint (mint.lnpay.cz)↗custodialcashulightning

Live public Cashu mint: free GET https://mint.lnpay.cz/v1/info returned HTTP 200, software Nutshell/0.21.0, 2 keysets (1 active, units sat). Custodial; see custody. Reachable now is not an endorsement.

YES

Custody. Custodial: the operator holds the sats backing all outstanding ecash. Own page: 'By sending funds to this mint, you acknowledge that you are making a voluntary, non-refundable contribution to the operator and receive no guarantee of value, service, or return.' Do not hold balances. Limits from /v1/info: mint (NUT-04) bolt11/sat no max stated; melt (NUT-05) bolt11/sat no max stated. Contact methods published: email, twitter, nostr.

“This mint is for demonstration purposes only”

source: mint.lnpay.cz/v1/info

last checked 2026-10-18

macadamia Mint (mint.macadamia.cash)↗custodialcashulightning

Live public Cashu mint: free GET https://mint.macadamia.cash/v1/info returned HTTP 200, software cdk-mintd/0.18.1, 4 keysets (1 active, units sat). Custodial; see custody. Reachable now is not an endorsement.

YES

Custody. Custodial: the operator holds the sats backing all outstanding ecash. Default mint of the macadamia wallet (per /v1/info description). Operator identity beyond that UNVERIFIED. Limits from /v1/info: mint (NUT-04) bolt11/sat max 150000; melt (NUT-05) bolt11/sat max 150000. Contact methods published: email.

“Please use this mint at your own risk. Refunds may not always be possible. Only mint amounts you are ready to lose.”

source: mint.macadamia.cash/v1/info

last checked 2026-10-18

Mineracks Mint (mint.mineracks.com)↗custodialcashulightning

Live public Cashu mint: free GET https://mint.mineracks.com/v1/info returned HTTP 200, software Nutshell/0.19.2, 1 keysets (1 active, units sat). Custodial; see custody. Reachable now is not an endorsement.

YES

Custody. Custodial: the operator holds the sats backing all outstanding ecash. Operator named in own description (mineracks). Marked experimental; no limits published. Limits from /v1/info: mint (NUT-04) bolt11/sat no max stated; melt (NUT-05) bolt11/sat no max stated. Contact methods published: email, nostr.

“Public Cashu mint (experimental). Operated by mineracks”

source: mint.mineracks.com/v1/info

last checked 2026-10-18

Minibits mint (mint.minibits.cash/Bitcoin)↗custodialcashulightning

Live public Cashu mint: free GET https://mint.minibits.cash/Bitcoin/v1/info returned HTTP 200, software cdk-mintd/0.17.7, 3 keysets (1 active, units sat). Custodial; see custody. Reachable now is not an endorsement.

YES

Custody. Custodial: the operator holds the sats backing all outstanding ecash. Operator named in /v1/info description as Minibits (wallet project). Own page says: 'Do not use with large amounts of ecash'. Limits from /v1/info: mint (NUT-04) bolt11/sat max 1000000, onchain/sat max 5000000; melt (NUT-05) bolt11/sat max 1000000, onchain/sat max 1000000. Contact methods published: nostr, email.

“Minibits is an active research project in BETA, use at your own risk.”

source: mint.minibits.cash/Bitcoin/v1/info

last checked 2026-10-18

Mint Cuba Bitcoin (mint.cubabitcoin.org)↗custodialcashulightning

Live public Cashu mint: free GET https://mint.cubabitcoin.org/v1/info returned HTTP 200, software Nutshell/0.21.0, 3 keysets (2 active, units sat/usd). Custodial; see custody. Reachable now is not an endorsement.

YES

Custody. Custodial: the operator holds the sats backing all outstanding ecash. Community service by Cuba Bitcoin (per /v1/info description, Spanish). description_long warns it is still in development and may contain bugs (Spanish text). Limits not published. Limits from /v1/info: mint (NUT-04) bolt11/sat no max stated; melt (NUT-05) bolt11/sat no max stated. Contact methods published: email, X, nostr.

“Servicio comunitario de Cashu Mint por Cuba Bitcoin”

source: mint.cubabitcoin.org/v1/info

last checked 2026-10-18

Mountainlake M5 (mint.mountainlake.io)↗custodialcashulightning

Live public Cashu mint: free GET https://mint.mountainlake.io/v1/info returned HTTP 200, software Nutshell/0.21.0, 4 keysets (1 active, units sat). Custodial; see custody. Reachable now is not an endorsement.

YES

Custody. Custodial: the operator holds the sats backing all outstanding ecash. Hobbyist operator ('I am a Bitcoiner supporting the adoption of Bitcoin', own page). No warning text or limits published in /v1/info; large-balance risk UNVERIFIED. Limits from /v1/info: mint (NUT-04) bolt11/sat no max stated; melt (NUT-05) bolt11/sat no max stated. Contact methods published: email, nostr.

“A mint for bitcoiners, friends, and family”

source: mint.mountainlake.io/v1/info

last checked 2026-10-18

showing 10 of 17 matches

Wallets and agent skills11

Software an agent can use to hold and send ecash.

archetech/agent-skills (archon-cashu)↗cashup2pk

Agent skill for a DID-native Cashu wallet that locks tokens to a recipient DID key via P2PK (NUT-11). Not run by me.

YES

“Locks ecash to the recipient's DID secp256k1 pubkey.”

source: github.com/archetech/agent-skills/tree/main/archon-cashu

last checked 2026-10-18

cashubtc/cashu-skill ↗cashu

Official-org repo describing itself as a Cashu wallet skill for AI agents. Stars/forks small (26 stars on the fetched page). I did not run it.

YES

“A Cashu wallet skill for AI agents”

source: github.com/cashubtc/cashu-skill

last checked 2026-10-18

cashubtc/nutshell ↗cashulightning

Reference Python implementation (wallet CLI and mint). The generic CLI an agent can shell out to; not agent-specific.

YES

“Chaumian ecash wallet and mint for Bitcoin”

source: github.com/cashubtc/nutshell

last checked 2026-10-18

Egge21M/cocod ↗cashulightningx-cashu

CLI + daemon Cashu wallet whose README lists X-Cashu HTTP 402 handling, so an agent can pay NUT-24 endpoints from a shell. Not run by me.

YES

“Handle HTTP 402 payments with X-Cashu”

source: github.com/Egge21M/cocod

last checked 2026-10-18

hexdaemon/hexnuts ↗cashulightning

Repo About text: lightweight Cashu wallet for AI agents. 0 stars; unaudited.

YES

“A lightweight Cashu ecash wallet for AI agents”

source: github.com/hexdaemon/hexnuts

last checked 2026-10-18

jeletor/cashu-agent ↗cashu

Repo About text claims a Cashu wallet for AI agents with multi-mint support. 0 stars on the fetched page; unaudited.

YES

“Cashu ecash wallet for AI agents. Privacy-preserving payments, offline transfers, multi-mint support.”

source: github.com/jeletor/cashu-agent

last checked 2026-10-18

shroominic/sixty-nuts ↗cashunostr

Python NIP-60 Cashu wallet library; usable from agent code, not agent-specific.

YES

“A lightweight, stateless Cashu wallet implementation following NIP-60 specification for Nostr-based wallet state management.”

source: github.com/shroominic/sixty-nuts

last checked 2026-10-18

aeschylus/botwallets ↗cashu

Repo About claims a simple Cashu wallet API for autonomous agents; 3 commits and 0 stars on the fetched page, so immature.

KINDA

“Bitcoin ecash wallets for bots - simple Cashu wallet API for autonomous agents”

source: github.com/aeschylus/botwallets

last checked 2026-10-18

callebtc/cashu-wallet-cli-tools ↗cashu

Small Cashu CLI by a Cashu core dev; not described as agent-specific, but scriptable.

KINDA

“Small Cashu wallet CLI tool”

source: github.com/callebtc/cashu-wallet-cli-tools

last checked 2026-10-18

eridanux/cashu-skill ↗cashu

CAUTION. Name copies cashubtc/cashu-skill. README is marketing-style boilerplate promising an agent wallet; I did not inspect releases or code. Treat as UNVERIFIED provenance: do not install binaries from a lookalike repo; prefer the cashubtc org one.

KINDA

“Welcome to the cashu-skill project. This application enables AI agents to manage digital cash seamlessly.”

source: github.com/eridanux/cashu-skill

last checked 2026-10-18

showing 10 of 11 matches

MCP servers5

MCP servers that expose Cashu to an AI assistant.

cachet-jp/ln-agent-poc-v2 ↗cashulightningmcp

MCP server whose own description says purchases (gift cards, eSIMs, top-ups) are paid from Cashu ecash over Lightning. A PoC per its name; I did not run purchases.

YES

“MCP server & Claude Code skills to buy gift cards, eSIMs & mobile top-ups with Bitcoin — paid from Cashu ecash over Lightning.”

source: github.com/cachet-jp/ln-agent-poc-v2

last checked 2026-10-18

forgesworn/402-mcp ↗l402x402cashulightningmcp

Client MCP that auto-pays L402/x402 APIs and can pay with Cashu tokens from a token file; per-payment cap configurable (MAX_AUTO_PAY_SATS, default 1000).

YES

“Auto-pay with Lightning (NWC), Cashu ecash, LNURLcash bearer notes, or human QR fallback”

source: github.com/forgesworn/402-mcp

last checked 2026-10-18

gzuuus/nutoff-wallet ↗cashulightningmcp

README: CLI plus MCP server implementing a Cashu wallet (mint/send/receive/pay invoices). Educational/testing per its own warning ('Use at your own risk'). Wallet MCP, not a paid-API seller.

YES

“A command-line interface and MCP server interface implementing a Cashu wallet”

source: github.com/gzuuus/nutoff-wallet

last checked 2026-10-18

pablof7z/mcp-money ↗cashulightningnostrmcp

MCP server giving agents a Cashu (NDK) wallet with Lightning deposits and Nostr zaps. Not run by me.

YES

“MCP server to give nutsack wallets to agents”

source: github.com/pablof7z/mcp-money

last checked 2026-10-18

tdelabro/cashu-mcp-wallet ↗cashu

Despite the name this is not an MCP server: its README title describes a Telegram bot for Cashu tokens.

“Telegram bot designed to handle Cashu tokens with long message support.”

source: github.com/tdelabro/cashu-mcp-wallet

last checked 2026-10-18

APIs and middleware15

Services and libraries that charge in Cashu over HTTP 402 (NUT-24).

Athenut (search paid with Cashu)↗cashux-cashu

Frontend README says each search spends one Cashu token sent in an X-Cashu header. Probe: athenut.com returns 200 (a WASM app, no payment challenge visible); backend URL not given in the page, so no 402 probe (UNVERIFIED live behaviour).

YES

“Each search spends one token, sent to the backend in an X-Cashu header”

source: github.com/thesimplekid/athenut-frontend

last checked 2026-10-18

cashubtc/xcashu ↗cashux-cashunut-24

Python (FastAPI) reference for X-Cashu HTTP 402 under the Cashu org (24 stars).

YES

“X-Cashu – HTTP 402: Payment Required”

source: github.com/callebtc/xcashu

last checked 2026-10-18

Clawtar demo (clawtar.cashutools.dev)↗cashux-cashunut-24NUT-24 402 seen

Live NUT-24 demo. Unpaid POST /v1/clawtar/ask with a question returned HTTP 402 plus an X-Cashu creqA header: 42 sat, unit sat, accepted mints minibits.cash/Bitcoin, mint.103100.xyz, mint.coinos.io, mint.mountainlake.io (decoded from the header). Nothing paid.

YES

“Clawtar is an agent-first demo for Cashu 402 payments, allowing agents to learn autonomous payments and briefly glimpse the meaning of life.”

source: github.com/robwoodgate/clawtar

last checked 2026-10-18

jbsdx/express-cashu ↗cashux-cashunut-24

Express middleware for NUT-24 so an API can charge in Cashu. Library.

YES

“NodeJS / NUT-24 Express middleware - Enabling payments for http resources”

source: github.com/jbsdx/express-cashu

last checked 2026-10-18

ProxNut ↗cashu

Cashu proxy to protect/monetise web resources, tokens accepted for access. 28 stars on the fetched page. Not deployed by me.

YES

“ProxNut is a Cashu proxy designed to protect or monetize web resources.”

source: github.com/gandlafbtc/proxnut

last checked 2026-10-18

Routstr (routstr-core)↗cashulightning

Pay-per-request AI inference marketplace where Cashu ecash is the payment unit; node software routstr-core. Probe: api.routstr.com returned 404 on / /v1/models and /v1/chat/completions, so I have no live paid-endpoint proof; its mint.routstr.com /v1/info is live (see mint row). Provider nodes list at routstr.com/providers (not probed).

YES

“It enables an open marketplace where anyone can buy and sell compute using Bitcoin eCash (Cashu)”

source: docs.routstr.com/

“Routstr is a decentralized protocol for permissionless, private, and censorship-resistant AI inference.”

source: github.com/Routstr/routstr-core

last checked 2026-10-18

Routstr/otrta-client ↗cashux-cashu

Local proxy that pays an OpenAI-style request with an e-cash note in an X-Cashu header; routstr client.

YES

“routstr client is a privacy-focused payment gateway that enables anonymous micropayments for AI services using Cashu e-cash”

source: github.com/Routstr/otrta-client

last checked 2026-10-18

Sats4Tokens ↗cashulightning

Pay sats (Lightning or Cashu) to receive a capped AI API key. Live site returned 200; no paid-flow test (would require paying).

YES

“Sats4Tokens: pay sats (Lightning or Cashu ecash), get a capped AI API key.”

source: github.com/beihaili/sats4tokens

last checked 2026-10-18

toll-booth (forgesworn)↗l402cashux402lightning

Middleware that lets any API accept Lightning, Cashu or NWC payments; README lists xcashu (NUT-24) direct-header payments. Library, not a hosted service.

YES

“Clients pay with Lightning, Cashu ecash, or NWC”

source: github.com/forgesworn/toll-booth

last checked 2026-10-18

402 for Dummies (NUT-24 landing)↗cashux-cashunut-24

Educational page walking the NUT-24 flow. Its example uses Host 402fordummies.com, which did not resolve; GET 402fordummies.dev/premium/guide returned 404. So the demo endpoint is not live from my probe.

KINDA

“Server returns HTTP 402 + X-Cashu”

source: 402fordummies.dev/

last checked 2026-10-18

showing 10 of 15 matches

Tools7

Libraries and utilities around Cashu.

babdbtc/nutpay ↗cashux-cashu

Chrome extension that pays X-Cashu HTTP 402 automatically; browser tool, not an agent runtime. 2 stars.

YES

“Chrome extension for automatic Cashu micropayments via X-Cashu protocol (HTTP 402)”

source: github.com/babdbtc/nutpay

last checked 2026-10-18

brainbytes-dev/leashd ↗lightningcashux402mcp

Spend-governance layer for agents with a Cashu rail among Lightning (NWC) and x402; claims non-custodial.

YES

“Non-custodial spend governance for autonomous AI agents.”

source: github.com/brainbytes-dev/leashd

last checked 2026-10-18

cashubtc/cdk ↗cashu

Cashu Development Kit (Rust): the library under many mints and wallets (the cdk-mintd software seen in several /v1/info probes below).

YES

“Cashu Development Kit”

source: github.com/cashubtc/cdk

last checked 2026-10-18

ChuXo/plugin-nostr ↗cashunostr

ElizaOS plugin combining Nostr, Cashu and an agent-to-agent protocol; claims micropayments, not independently tested.

KINDA

“Nostr + Cashu ecash + A2N (Agent-to-Agent Nostr) protocol plugin for ElizaOS”

source: github.com/ChuXo/plugin-nostr

last checked 2026-10-18

JamesKevinJones/boss-battle-dvm-agent ↗cashunostr

Hackathon Nostr DVM that audits Bitcoin scripts and is paid via Cashu; demo-grade.

KINDA

“Nostr DVM (NIP-90) that audits Bitcoin Script/PSBT for vulnerabilities, paid via Cashu e-cash.”

source: github.com/JamesKevinJones/boss-battle-dvm-agent

last checked 2026-10-18

johnzilla/arbstr-vault ↗lightningcashu

Centralised treasury ('bank') for agents with Cashu (self-hosted Nutshell) and LND rails: by design custodial, so it is not a self-custody wallet.

KINDA

“A centralized treasury service that acts as a "bank" for AI agents.”

source: github.com/johnzilla/arbstr-vault

last checked 2026-10-18

longevityboris/peer2prompt ↗cashu

Protocol proposal for anonymous AI inference paid with Cashu; no live network checked.

KINDA

“A peer-to-peer protocol for anonymous AI inference using Ghost Nodes and Cashu ecash”

source: github.com/longevityboris/peer2prompt

last checked 2026-10-18

Specification1

The standard behind paying over HTTP 402 with ecash.

NUT-24: HTTP 402 Payment Required ↗cashux-cashunut-24

The spec that defines the flow: server replies 402 with X-Cashu payment request, client retries with a cashuB token in X-Cashu.

YES

“HTTP servers may respond with the HTTP status code 402 and an X-Cashu header containing a payment request”

source: github.com/cashubtc/nuts/blob/main/24.md

last checked 2026-10-18