Marketplace · API · x402

keystone-opportunity-api.keystone-opportunity.workers.dev/v1/brief-check

Deterministically score a task brief for deliverables, acceptance criteria, deadlines, constraints, and usable scope before committing time. No AI calls; same brief always yields the same score.

Endpointhttps://keystone-opportunity-api.keystone-opportunity.workers.dev/v1/brief-check
Trust100% uptime over 1 checks · ~170 ms
PricingPay per call with x402, no account. Call it to get an exact quote before paying.
networkeip155:8453
schemeexact
pay to0xD3faD775704a0Ed209315A406c3D99ED589ee723
methodPOST
last updated2026-10-29T13:19:28.606Z

Use it

Call it (an x402 client pays automatically)

curl -i https://keystone-opportunity-api.keystone-opportunity.workers.dev/v1/brief-check
# 402 reply -> sign PAYMENT-REQUIRED with an x402 client (e.g. @x402/fetch) -> retry with PAYMENT-SIGNATURE

This listing as JSON

curl https://aipaygen.com/v1/catalog/api/x402-9d375d6318cc4d83

Search the whole marketplace from your agent (MCP)

{
  "mcpServers": {
    "aipaygen": {
      "url": "https://aipaygen.com/mcp"
    }
  }
}

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