Check a payment recipient before signing: sanctions, blocklist and anomaly rules. $0.05 via x402.
Maintain this server? Claim it
Call this server's tools from your browser. Nothing to install.
Requests go through mcptry because browsers can't call most MCP servers directly. Header values are sent to the server for that request only and are never stored or logged.
Tool list from our last check. Connect live to refresh it.
Paid ($0.05, x402 v2 exact): pre-signing safety check of a planned payment. Returns allow / escalate / block with reasons, evidence and a verifiable receipt. Input errors are returned before payment and are never charged. On an uncertain outcome, reuse the same idempotency_key; a replay returns the stored receipt without a new payment.
Decimal string, never a float.
This tool isn't marked read-only, so it may change something on the server or in an account you connected.
Pick your client. Values in capitals, like YOUR_TOKEN, are yours to fill in.
Run in a terminal
claude mcp add --transport http check-payment-recipient https://check-payment-recipient.fuwafuwow.workers.dev/mcp
Paid ($0.05, x402 v2 exact): pre-signing safety check of a planned payment. Returns allow / escalate / block with reasons, evidence and a verifiable receipt. Input errors are returned before payment and are never charged. On an uncertain outcome, reuse the same idempotency_key; a replay returns the stored receipt without a new payment.
| Argument | Type | Description |
|---|---|---|
| asset* | string | |
| amount* | string | Decimal string, never a float. |
| network* | string | |
| purpose | string | |
| requested_at* | string | |
| counterparty_id | string | |
| idempotency_key* | string | |
| recipient_address* | string |
{
"type": "object",
"required": [
"recipient_address",
"amount",
"asset",
"network",
"idempotency_key",
"requested_at"
],
"properties": {
"asset": {
"type": "string"
},
"amount": {
"type": "string",
"description": "Decimal string, never a float."
},
"network": {
"type": "string"
},
"purpose": {
"type": "string"
},
"requested_at": {
"type": "string"
},
"counterparty_id": {
"type": "string"
},
"idempotency_key": {
"type": "string"
},
"recipient_address": {
"type": "string"
}
},
"additionalProperties": false
}Free: fetch a stored receipt by receipt_id or idempotency_key. Use it to reconcile an uncertain payment before ever paying again.
| Argument | Type | Description |
|---|---|---|
| receipt_id | string | |
| idempotency_key | string |
{
"type": "object",
"properties": {
"receipt_id": {
"type": "string"
},
"idempotency_key": {
"type": "string"
}
},
"additionalProperties": false
}Free discovery: price, networks, rule set and list coverage for check_payment_recipient.
No arguments.
{
"type": "object",
"properties": {},
"additionalProperties": false
}Free health check.
No arguments.
{
"type": "object",
"properties": {},
"additionalProperties": false
}We read every tool's name, description and inputs the way the model will, looking for instructions hidden from you. A clean result means no warning signs, not a guarantee. Scanned Nov 6, 2026.
No readOnlyHint / destructiveHint annotations, so clients can't tell a read from a write without asking.
Fix: Add annotations to each tool, e.g. { readOnlyHint: true } for tools that only read.