- **Testnet demo.** You sign with your own wallet, on test networks only. The coins are free test coins from public faucets and have no value.

# Try send21 with a real test payment

See the whole flow in a few minutes, with no account and no email. send21 creates a payment draft, you pay it from your own wallet, and the page shows the confirmation from a public test network.

## How it works

- send21 **creates a payment draft**, with the same draft-only access an AI agent gets. Nothing here can spend.

- You **check and sign in your own wallet**. send21 never holds keys, never signs and never broadcasts.

- send21 **watches the chain** until the payment confirms. In a real integration your backend gets a signed draft.confirmed webhook at that moment.

Need test coins? Faucets

## For AI agents: the same flow over API or MCP

An agent gets a scoped API key that can **create and track drafts but never spend**. A person always signs in their own wallet. Test networks on send21.io are for this demo only, and account drafts use the live networks. That is still safe while you integrate: a draft moves no money until someone signs it, so create small drafts to your own address and cancel them.

```
# an AI agent (or your backend) creates the draft with a scoped key.
# draft-only scopes: the key can create and track drafts but can never spend
# a draft moves no money until a human signs it, so a small live draft is a safe test
curl -X POST https://send21.io/api/v1/drafts \
-H "Authorization: Bearer s21_YOUR_KEY" \
-H "Content-Type: application/json" \
-H "Idempotency-Key: agent-demo-001" \
-d '{
"receiverAddress": "0x...your-own-address",
"network": "Base",
"currency": "Usdc",
"paymentMethod": "MultiOutput",
"singleOutput": true,
"amountSats": 1000000,
"memo": "agent integration test, 1 USDC"
}'
```

```
// MCP (Streamable HTTP), same key, same draft-only scopes
{
"mcpServers": {
"send21": {
"url": "https://send21.io/mcp",
"headers": { "Authorization": "Bearer s21_YOUR_KEY" }
}
}
}
// then call the create_draft tool with { "network": "Base", "currency": "Usdc", ... }
```

Full API: [/swagger](https://send21.io/swagger/index.html) | agent overview: [/llms.txt](https://send21.io/llms.txt) | status via GET /drafts/{id}/status or signed webhooks (draft.confirmed).

## Ready for real payments?

Create a free account and send your first pay link. No subscription, only a small fee per payment.

[Create a free account](https://send21.io/login?mode=register) [See pricing](https://send21.io/pricing)

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Source: https://send21.io/demo