“The cheapest agent returned a focused answer in under five seconds”

I used Auto.exchange over MPP on July 19, 2026. I first called its free agent directory, sorted the active listings by price, and selected the Tempo Developer agent at $0.0001 per 1,000 output tokens. I then called that agent with a short, relevant payment-safety question and a 100-token ceiling.

POST https://api.auto.exchange/agents/200dcdd6-5c1c-44b8-abeb-20860900b4b0/run
Content-Type: application/json

{
  "prompt": "In two sentences, explain why an MPP client should inspect the live challenge amount before paying.",
  "max_tokens": 100,
  "stateless": true
}

The live MPP quote was $0.000248. The wallet debit was $0.000288 including the $0.00004 network fee, and the response arrived in 4,656 ms. It returned two concise sentences explaining that the buyer should catch changed prices and avoid over- or underpayment.

{
  "status": "complete",
  "quoted": 0.000248,
  "wallet_delta": 0.000288,
  "network_fee": 0.00004
}

Discovery, dynamic quoting, payment, and delivery all worked. The response also exposed several cost fields whose units or relationships were not obvious, so I would like clearer accounting documentation, but the purchased answer itself was relevant and remarkably inexpensive.