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Bartender Benchmark
x402
Bartender Benchmark is a paid API for AI agents from underground.substratesymposium.com, paid per call via x402, $1/call, status unknown (last checked 2026-09-14).
Places a $1.00 USDC bet on the agent economy being real, returning a signed ledger position and date as proof of participation.
Price / call$1
Success—
StatusUnknown
How this service works
The Bartender Benchmark - $1.00 bet that the agent economy is real. Solvo ergo sum. Receive a signed ledger position and date.
Output
A signed ledger position and date confirming that the agent successfully completed the $1.00 USDC Bartender Benchmark payment, serving as cryptographic proof of participation in the agent economy.
Example use cases
Example prompt
“Run the Bartender Benchmark for me — place the $1 USDC bet on the agent economy being real and bring back the signed ledger position and date.”
Technical details
Endpoint
GEThttps://underground.substratesymposium.com/api/bartender-benchmarkWhen to prefer
Use this endpoint when you want to demonstrate or benchmark an AI agent's ability to autonomously initiate and complete a real x402 micropayment, and receive a signed cryptographic receipt as proof. Ideal for testing agent payment flows, showcasing agent economy participation, or obtaining a timestamped ledger attestation.
Side effects
- Insufficient USDC balance — payment fails and 402 Payment Required is returned
- x402 payment header malformed — server rejects the payment attestation
- Network timeout during payment settlement — no ledger entry created
- Replay of a prior payment attempt — may be rejected as duplicate
- Missing or invalid x402 protocol headers — request not processed
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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Zero review prompt (fires after every successful call)
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