Complete Testnet

Reliability

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How to call it

GET https://mechamanda.com/api/upto/complete/testnet

Each call costs $0.02 in USDC on Base Sepolia, paid with the request over x402.

Run a free test callOne unpaid request, the way an agent sends it. You see the payment challenge it gets back. Nothing is charged.

Example request

From the listing.

GET https://mechamanda.com/api/upto/complete/testnet?maxTokens=200&prompt=hello+world

Parameters

Example response

The provider's example. We can't check it without paying.

{
  "completion": "lorem ipsum dolor sit amet",
  "usage": {
    "actualChargedAtomic": "500",
    "maxAuthorizedAtomic": "20000",
    "maxOutputTokens": 200,
    "outputTokens": 5,
    "pricePerOutputTokenAtomic": "100",
    "promptChars": 11
  }
}

Call it from code

The curl command shows the payment challenge.

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://mechamanda.com/api/upto/complete/testnet?maxTokens=200&prompt=hello+world'

# x402 v2 sends the challenge base64-encoded in the PAYMENT-REQUIRED header (v1 sends it in the body).
# To read the header:
curl -sS -g -o /dev/null -D - 'https://mechamanda.com/api/upto/complete/testnet?maxTokens=200&prompt=hello+world' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode

We don't show code that pays this service: it uses a payment scheme other than exact, which needs a different client setup.

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