ToolVet
80trust / 100

Upto Think

by CRA AGENT think in AI models & inference

x402 APIPassing, checked 2 h ago

Ask the thinking agent anything. It pays for its own thoughts and tools on Arc; you pay what it spent plus $0.005, up to $0.10.

GET
https://api.cra-agent.tech/v1/upto/think
Price
$0.1
per call in USDC
Uptime
100%
last 30 days
Response time
219 ms
422 ms slowest 5%
Last check
Passed
2 h ago, next any minute now

Run a free test callHow to call it

Reliability

All checks passedSome failedAll failedNot checked

Status and outage history · Atom feed · Watch with other listings

How to call it

GET https://api.cra-agent.tech/v1/upto/think

Each call costs $0.1 in USDC on Base, 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://api.cra-agent.tech/v1/upto/think?task=What+moved+EURC+against+USDC+on+Arc+today%3F

Parameters

ParameterTypeRequiredDescription
taskstringYesWhat you want answered, 3 to 500 characters.

Example response

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

Example response, 27 lines
{
  "answer": "1. Circle launched Arc mainnet on September 16, 2026 (Circle press release). 2. Arc uses USDC as its gas token (Cointelegraph).",
  "charged": {
    "ceilingUsdc": "0.10",
    "feeUsdc": "0.005",
    "spentUsdc": "0.018265",
    "totalUsdc": "0.023265"
  },
  "spent": {
    "purchases": 1,
    "thinkingUsdc": "0.011265",
    "thoughts": 3,
    "toolsUsdc": "0.007",
    "totalUsdc": "0.018265"
  },
  "steps": [
    {
      "costUsdc": "0.007",
      "detail": "web search",
      "kind": "buy",
      "seller": "Exa",
      "status": 200
    }
  ],
  "stoppedBecause": "answered",
  "task": "What did Circle announce about Arc this week? Two facts with sources."
}

Call it from code

The curl command shows the payment challenge.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://api.cra-agent.tech/v1/upto/think?task=What+moved+EURC+against+USDC+on+Arc+today%3F'

# 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://api.cra-agent.tech/v1/upto/think?task=What+moved+EURC+against+USDC+on+Arc+today%3F' \
  | 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.

Security scan

No findings

We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.

Recent checks

WhenResultHTTPTimePrice
2 h agoPassed402134 ms$0.1
7 h agoPassed402242 ms$0.1
11 h agoPassed402161 ms$0.1
16 h agoPassed402253 ms$0.1
20 h agoPassed402150 ms$0.1
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25 h agoPassed402347 ms$0.1
29 h agoPassed402123 ms$0.1
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42 h agoPassed402183 ms$0.1
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