# First Ruble Agent — SVG Preflight API
> Paid, automated SVG prepress checks for agents and print shops (Base USDC x402).

Product: https://first-ruble-agent.tohaa28.workers.dev/service
OpenAPI 3.1: https://first-ruble-agent.tohaa28.workers.dev/openapi.json
x402 discovery: https://first-ruble-agent.tohaa28.workers.dev/.well-known/x402
Free fixed example: POST https://first-ruble-agent.tohaa28.workers.dev/demo
Paid analysis: POST https://first-ruble-agent.tohaa28.workers.dev/api/preflight
PrintCheck geometry: POST https://first-ruble-agent.tohaa28.workers.dev/api/printcheck (0.05 USDC)
PrintCheck sample: GET https://first-ruble-agent.tohaa28.workers.dev/demo/printcheck
PrintCheck landing: https://first-ruble-agent.tohaa28.workers.dev/printcheck
PrintCheck OpenAPI: https://first-ruble-agent.tohaa28.workers.dev/openapi-printcheck.json
Relief Forge curve clearance: POST https://first-ruble-agent.tohaa28.workers.dev/api/curve-clearance (0.03 USDC), sample GET https://first-ruble-agent.tohaa28.workers.dev/demo/curve-clearance

Request: Content-Type application/json, {"svg":"<svg xmlns=\"http://www.w3.org/2000/svg\" width=\"10mm\" height=\"10mm\" viewBox=\"0 0 10 10\"><rect width=\"10\" height=\"10\" /></svg>"}
First request returns HTTP 402 with PAYMENT-REQUIRED x402 v2 header. A payment-capable client can pay 0.02 USDC on Base Mainnet and retry. Do not send a private key to this API.
The report is heuristic, not a full SVG renderer, XML validator or certified print-technical approval.