Send a paid venture intake directly into Startup Rocket.

Canonical payload

{
  "intake_submission": {
    "founder_name": "Ada Lovelace",
    "founder_email": "ada@example.com",
    "startup_name": "Analytical Engines",
    "website_url": "https://analytical.example.com",
    "summary": "Evidence-backed workflow tooling for technical founders.",
    "packet_data": {
      "team": {
        "founder_name": "Ada Lovelace",
        "team_size": "2-3"
      },
      "product": {
        "product_name": "Analytical Engines",
        "problem": "Technical founders lose time proving traction and diligence readiness."
      },
      "market": {
        "target_customer": "Seed and pre-seed founders preparing to raise",
        "market_size": "$4B workflow software opportunity"
      },
      "traction": {
        "current_stage": "mvp_live",
        "users_growth": "12 active companies using the workflow each week"
      },
      "financial": {
        "revenue_model": "Subscription software",
        "runway_months": "18"
      }
    }
  }
}

Minimal curl flow

curl -i \
  -X POST \
  -H "Content-Type: application/json" \
  https://startuprocket.railsplayground.com/api/v1/x402/intake_submissions.json \
  -d @payload.json

# Read the PAYMENT-REQUIRED header from the 402 response.
# Pay the challenge, then retry with:

curl -i \
  -X POST \
  -H "Content-Type: application/json" \
  -H "PAYMENT-SIGNATURE: <base64-encoded payment payload>" \
  https://startuprocket.railsplayground.com/api/v1/x402/intake_submissions.json \
  -d @payload.json

OpenClaw Example

Example prompt flow for an OpenClaw-style agent using the public paid intake contract. The agent assembles the venture payload first, requests the 402 challenge, pays it, then retries the same request with the encoded payment payload.

{
  "task": "Create a paid Startup Rocket intake for this founder.",
  "request": {
    "method": "POST",
    "url": "https://startuprocket.railsplayground.com/api/v1/x402/intake_submissions.json",
    "headers": {
      "Content-Type": "application/json"
    },
    "body": {
      "intake_submission": {
        "founder_name": "Ada Lovelace",
        "founder_email": "ada@example.com",
        "startup_name": "Analytical Engines",
        "website_url": "https://analytical.example.com",
        "summary": "Evidence-backed workflow tooling for technical founders.",
        "packet_data": {
          "team": {
            "founder_name": "Ada Lovelace",
            "team_size": "2-3"
          },
          "product": {
            "product_name": "Analytical Engines",
            "problem": "Technical founders lose time proving traction and diligence readiness."
          },
          "market": {
            "target_customer": "Seed and pre-seed founders preparing to raise",
            "market_size": "$4B workflow software opportunity"
          },
          "traction": {
            "current_stage": "mvp_live",
            "users_growth": "12 active companies using the workflow each week"
          },
          "financial": {
            "revenue_model": "Subscription software",
            "runway_months": "18"
          }
        }
      }
    }
  },
  "retry_rule": "If the response is 402, read PAYMENT-REQUIRED, pay the challenge, then repeat the same request with PAYMENT-SIGNATURE."
}

Agent Notes

• Use x402 when the founder is not signed in yet and you need a public paid create-and-handoff flow.
• Retry the exact same intake body after payment. Only the PAYMENT-SIGNATURE header changes.
• On success, store the returned founder_claim.path and founder_handoff.path so the human can take over in the web app.
• If the founder already has a Startup Rocket login and wants ongoing agent access, use the authenticated MCP or OAuth flow instead of x402.