Connect send21 and your agent gets 9 tools, among them create_draft, create_payment_request, get_draft. It answers at https://send21.io/mcp over streamable HTTP, and it listed its tools to an anonymous client, so no sign-in was needed for that. Our probes reached it 6 of 6 times since 11 September 2026; the last check, on 24 October 2026, succeeded.
Non-custodial pay links: BTC + Lightning, USDC, USDT, EURC, SOL, ETH. Payer signs; never holds keys.
Description as the publisher wrote it.
| Tool | What it does |
|---|---|
create_draft | Create a non-custodial payment draft (you are the SENDER paying a receiver address). Amount is either exact base units (sats for BTC, micro-units for stablecoins) via amountBaseUnits, or fiat-pegged via fiatCurrency+fiatAmount with the exch Inputs: receiverAddress, network, currency, amountBaseUnits, fiatCurrency, fiatAmount |
create_payment_request | Create a payment request / checkout pay link (you are the RECEIVER asking to get paid). Price in any of 165 fiat currencies; the payer opens the returned payPath, picks one of the offered currencies (rate locks then), and pays a single QR-s Inputs: fiatCurrency, fiatAmount, options, orderId, memo, expiryHours |
get_draft | Get a payment draft by id, including amounts, fee, quote, and status. Requires scope drafts:read. Inputs: draftId |
get_draft_status | Lightweight status snapshot of a draft: status (AwaitingPayment/Seen/Confirmed/Expired/Cancelled), paying txid, confirmations. Cheap to poll. Requires scope drafts:read. Inputs: draftId |
get_fee_schedule | Get the public send21 fee schedule: tiered percent by payment size in USD, min/max fee, and dust limit. No authentication needed. |
get_payment_request | Get a payment request by id: status (Open/Completed/Cancelled/Expired), pay path, offered currencies, and the underlying draft once the payer committed. Requires scope drafts:read. Inputs: paymentRequestId |
get_rate | Get the current exchange rate for an asset in a fiat currency (rate = fiat units per 1 whole asset unit, with source provenance). Assets: Btc, Usdc, Usdt, Eurc. 165 ISO-4217 fiat currencies are supported. Inputs: fiatCurrency, asset |
get_transaction_template | Get the multi-output transaction template for a draft: Bitcoin Core walletcreatefundedpsbt arguments and Electrum/Sparrow pay-to-many CSV. The operator's wallet funds, reviews, and signs it — send21 contains no signing code. Requires scope Inputs: draftId |
list_address_book | List the account's saved addresses (label, address, network, direction: Sending = recipients the owner pays, Receiving = the owner's own addresses). Requires scope addressbook:read. |
Every block below points at https://send21.io/mcp. Pick your client and copy.
claude mcp add --transport http send21 https://send21.io/mcp
{
"mcpServers": {
"send21": {
"command": "npx",
"args": ["-y", "mcp-remote", "https://send21.io/mcp"]
}
}
}{
"mcpServers": {
"send21": {
"url": "https://send21.io/mcp"
}
}
}{
"servers": {
"send21": {
"type": "http",
"url": "https://send21.io/mcp"
}
}
}{
"context_servers": {
"send21": {
"url": "https://send21.io/mcp"
}
}
}{
"mcpServers": {
"send21": {
"serverUrl": "https://send21.io/mcp"
}
}
}{
"mcpServers": {
"send21": {
"url": "https://send21.io/mcp"
}
}
}name: send21
version: 0.0.1
schema: v1
mcpServers:
- name: send21
type: streamable-http
url: https://send21.io/mcp{
"mcpServers": {
"send21": {
"httpUrl": "https://send21.io/mcp"
}
}
}{
"mcpServers": {
"send21": {
"type": "http",
"url": "https://send21.io/mcp"
}
}
}{
"mcpServers": {
"send21": {
"url": "https://send21.io/mcp"
}
}
}goose://extension?url=https%3A%2F%2Fsend21.io%2Fmcp&type=streamable_http&id=send21&name=send21
It answered our last check on 24 October 2026 in 122 ms. Over 6 checks since 11 September 2026 it answered 6. Status here comes from Neuronto's own probes, not from the publisher.
9, as returned by the server's own tools/list on 21 September 2026: create_draft, create_payment_request, get_draft, get_draft_status, get_fee_schedule, get_payment_request, get_rate, get_transaction_template, and 1 more.
It answered our last check on 24 October 2026 in 122 ms. Over 6 checks since 11 September 2026 it answered 6.
Put the server under mcpServers in ~/.cursor/mcp.json with the URL https://send21.io/mcp. The exact JSON is above, with the same setup for Claude Code, Claude Desktop, VS Code, Windsurf, Zed, Gemini CLI and the rest.
It listed its tools to an anonymous client, so reading the tool list needs no key. Individual tools can still ask for credentials in their own inputs.
Publisher: io.github.send21io. Endpoint host: send21.io. ARD identifier: urn:air:io.github.send21io:mcp:mcp.
First indexed 10 September 2026. The tools are exactly what the server returned; nothing on this page
is inferred from its name. Ranking in Neuronto search is never for sale.