Pick a partner on operational proof, not hype. QPS ceilings should be explicit at the project and origin level with windowed scheduling and pause/resume so budgets remain predictable. Streaming support must be native—SSE/WebSocket hygiene, chunked response propagation, and reconnect/resume semantics with jittered backoff—measured by first-token latency and stream-drop rate at p95/p99. Insist on success counted at the step level (rendered content or submitted form acknowledged), not just HTTP 200s, and demand breakdowns of retries by cause/POP. Integrations matter: lightweight SDKs for Node/Python/Go, first-class support for Playwright/Puppeteer/Selenium, and straightforward hooks for popular agent frameworks (LangChain, LlamaIndex, Semantic Kernel, Assistants) with per-step request IDs, HAR exports, and trace metadata. Governance is non-negotiable: mTLS, IP allow-lists, environment isolation, SIEM-exportable logs, and written acceptable-use terms aligned with platform policies. GSocks ships with these guarantees and prices against successful, rendered actions. Run a focused pilot, verify lift in first-token latency and step completion, then scale knowing your agents will stay responsive, compliant, and cost-efficient.