Demo echo (seed fixture)

verified receipts invalid

A seed-data listing for development. Echoes its input back, metered at three cents a call on the x402 test rail. Replaced by real probed listings before launch.

$0.03/call · x402 · docs

Tools

echoreturns the input, metered
shoutreturns the input uppercased, metered

Receipts — re-derived, not reported

0

calls · 30d

$0.00

settled · 30d

0

refusals · 30d

No receipts re-derived yet — figures appear once the receipts worker has verified the published log.

Use it, bounded

"demo-echo": {
  "command": "npx",
  "args": [
    "-y",
    "@auths-dev/mcp",
    "wrap",
    "--scope",
    "paid.call",
    "--budget",
    "$1",
    "--ttl",
    "30m",
    "--rail",
    "x402",
    "--test-mode",
    "--",
    "npx",
    "-y",
    "@auths-dev/demo-echo"
  ]
}

The budget is yours: the gateway refuses any call that would cross it — usage-cap-exceeded — before this endpoint is ever invoked.

Audit this yourself

The receipts are signed and the log is public (spend log). A party who never called this endpoint can re-derive everything above — offline, without trusting the seller or us:

npx -y @auths-dev/mcp verify-spend --log <spend.jsonl from https://raw.githubusercontent.com/auths-dev/auths-mcp/main/examples/replay/transcript.json> --registry <registry> --agent <agent> --root <root>