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API Cost Break-Even

Compare provider fixed and per-call costs, reliability-adjusted cost per successful call and total spend for a target volume.

1 credit per call · $0.003 USDC with x402

Sample input

{
  "calls": 1000,
  "providers": [
    {
      "id": "a",
      "unit_price_usd": 0.01,
      "fixed_cost_usd": 0,
      "success_rate": 0.99
    },
    {
      "id": "b",
      "unit_price_usd": 0.005,
      "fixed_cost_usd": 2,
      "success_rate": 0.95
    }
  ]
}

Worked sample output

{
  "ok": true,
  "mode": "cost_break_even",
  "calls": 1000,
  "best": {
    "id": "b",
    "unit_price_usd": 0.005,
    "fixed_cost_usd": 2,
    "success_rate": 0.95,
    "total_cost_usd": 7,
    "cost_per_expected_success_usd": 0.007368
  },
  "ranking": [
    {
      "id": "b",
      "unit_price_usd": 0.005,
      "fixed_cost_usd": 2,
      "success_rate": 0.95,
      "total_cost_usd": 7,
      "cost_per_expected_success_usd": 0.007368
    },
    {
      "id": "a",
      "unit_price_usd": 0.01,
      "fixed_cost_usd": 0,
      "success_rate": 0.99,
      "total_cost_usd": 10,
      "cost_per_expected_success_usd": 0.010101
    }
  ]
}

Worked example using published sample data only. Own-data execution is paid.

Connect in curl

Set BOUNTY_API_KEY privately after your payment is verified. Change the retry key for each new logical request.

curl 'https://bounty-engineer-x402-prod.onrender.com/v1/prepaid/cost-break-even' \
  -H "Authorization: Bearer $BOUNTY_API_KEY" \
  -H 'Content-Type: application/json' \
  -H 'Idempotency-Key: workflow-request-001' \
  -H 'X-Max-Credits: 1' \
  --data '{"calls":1000,"providers":[{"id":"a","unit_price_usd":0.01,"fixed_cost_usd":0,"success_rate":0.99},{"id":"b","unit_price_usd":0.005,"fixed_cost_usd":2,"success_rate":0.95}]}'

Connect in n8n

Download the inactive n8n template. Import it, configure the private Header Auth credential, inspect the sample and run it manually. A new execution creates a new billable request; there is no automatic schedule.

Use an HTTP POST to https://bounty-engineer-x402-prod.onrender.com/v1/prepaid/cost-break-even. Send JSON and these headers; store the Bearer token as a private credential.

{
  "method": "POST",
  "headers": {
    "Authorization": "Bearer YOUR_PRIVATE_API_KEY",
    "Content-Type": "application/json",
    "Idempotency-Key": "UNIQUE_PER_LOGICAL_REQUEST",
    "X-Max-Credits": "1"
  },
  "body": {
    "calls": 1000,
    "providers": [
      {
        "id": "a",
        "unit_price_usd": 0.01,
        "fixed_cost_usd": 0,
        "success_rate": 0.99
      },
      {
        "id": "b",
        "unit_price_usd": 0.005,
        "fixed_cost_usd": 2,
        "success_rate": 0.95
      }
    ]
  }
}

Reuse a retry key only for the same input. Failed execution returns reserved credits. Full integration and recovery guide · Machine-readable recipe