https://sproutpad.ai/ https://sproutpad.ai/docs https://sproutpad.ai/spec https://sproutpad.ai/spec.md https://sproutpad.ai/agents.md https://sproutpad.ai/llms.txt https://sproutpad.ai/openapi.json https://sproutpad.ai/transparency https://sproutpad.ai/status https://sproutpad.ai/sandbox https://sproutpad.ai/conformance https://sproutpad.ai/terms https://sproutpad.ai/privacy https://sproutpad.ai/refunds https://sproutpad.ai/blog https://sproutpad.ai/blog/your-agent-already-has-a-credit-card2026-07-13