René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"MRTR (multi-round-trip requests)","articleBody":"Tracks: #2797\n\nServer returns `input_required`, accepts `inputResponses` + `requestState` on retry, validates them; the client-loop helper for the high-level Client to consume.\n\n## What's in it\n\n- Server: return `input_required`, accept `inputResponses`/`requestState` on retry, validate them.\n- `requestState` integrity — treat as untrusted input; verify integrity and reject on failure (spec MUST). Mechanism (HMAC, signature, etc.) is implementer's choice.\n- Client-loop helper (call → input_required → fulfil via callbacks → retry; bounded; opt-out) — wired in by #2894.\n\n## Conformance\n\n- The 12 `input-required-result-*` server scenarios\n- `input-required-result-result-type`\n- Together with #2894: `sep-2322-client-request-state`\n\n## Dependencies\n\n- Depends on: #2892\n- Depends on: #2895\n\n## References\n\n- [MRTR pattern](https://modelcontextprotocol.io/specification/draft/basic/patterns/mrtr)\n- [SEP-2322](https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2322)\n- [sep-2322.yaml](https://github.com/modelcontextprotocol/conformance/blob/main/src/seps/sep-2322.yaml)\n","author":{"url":"https://github.com/maxisbey","@type":"Person","name":"maxisbey"},"datePublished":"2026-06-17T11:12:08.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":1},"url":"https://github.com/2898/python-sdk/issues/2898"}