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feat(elicitation): Add support URL elicitation. SEP-1036#605

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pbezglasny wants to merge 1 commit intomodelcontextprotocol:mainfrom
pbezglasny:url_elicitation
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feat(elicitation): Add support URL elicitation. SEP-1036#605
pbezglasny wants to merge 1 commit intomodelcontextprotocol:mainfrom
pbezglasny:url_elicitation

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@pbezglasny
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@pbezglasny pbezglasny commented Jan 2, 2026

Motivation and Context

Implement SEP-1036 URL Mode Elicitation. Issue #513

Changes:

  • Change CreateElicitationRequestParam struct to enum with two options: FormElicitationParam and UrlElicitationParam
  • Added elicit_url and elicit_url_with_timeout methods to Peer
  • Added notification for notifications/elicitation/complete

How Has This Been Tested?

Breaking Changes

Next signatures of struct/functions changed:

  • CreateElicitationRequestParam now enum with option of form or url
  • changed supported_elicitation to supported_elicitation_modes with different return type in Peer

Types of changes

  • Bug fix (non-breaking change which fixes an issue)
  • New feature (non-breaking change which adds functionality)
  • Breaking change (fix or feature that would cause existing functionality to change)
  • Documentation update

Checklist

  • I have read the MCP Documentation
  • My code follows the repository's style guidelines
  • New and existing tests pass locally
  • I have added appropriate error handling
  • I have added or updated documentation as needed

Additional context

@github-actions github-actions bot added T-dependencies Dependencies related changes T-test Testing related changes T-config Configuration file changes T-core Core library changes T-examples Example code changes T-handler Handler implementation changes T-model Model/data structure changes T-service Service layer changes labels Jan 2, 2026
apexlnc added a commit to apexlnc/agentgateway that referenced this pull request Jan 29, 2026
@apexlnc
feat(mcp): support elicitation, tasks, and rmcp 0.14.0
8f34b0c 
- Add support for "Human-in-the-loop" parameter filling (SEP-1330) and
  handroll URL-mode support (SEP-1036) locally while awaiting
  upstream inclusion in modelcontextprotocol/rust-sdk#605.
- Implement full lifecycle management for background tasks (SEP-1686),
  allowing tools to enqueue long-running work and poll for results
  across multiplexed upstreams.
- Implement a "Soft Error" parser for code -32042 (URL Required) to
  relay interactive requirements as JSON-RPC data instead of
  transport failures, preserving stateful sessions.
- Refactor session setup to automatically negotiate and mirror
  protocol capabilities between downstream clients and upstream servers.
- Upgrade rmcp to 0.14.0, adopt decoupled structures (SEP-1319), and
  pin git rev ac4146e to resolve an enum variant shadowing issue
  (see modelcontextprotocol/rust-sdk#634).
- Enhance multiplexing logic to preserve and nest upstream _meta fields
  for end-to-end tracing and observability compliance.
- Replace legacy-rmcp (0.10.0) with modern 0.14.0 resumable-polling
  SSE implementations.
apexlnc added a commit to apexlnc/agentgateway that referenced this pull request Jan 29, 2026
@apexlnc
feat(mcp): support elicitation, tasks, and rmcp 0.14.0
4fe34cb 
- Add support for "Human-in-the-loop" parameter filling (SEP-1330) and
  handroll URL-mode support (SEP-1036) locally while awaiting
  upstream inclusion in modelcontextprotocol/rust-sdk#605.
- Implement full lifecycle management for background tasks (SEP-1686),
  allowing tools to enqueue long-running work and poll for results
  across multiplexed upstreams.
- Implement a "Soft Error" parser for code -32042 (URL Required) to
  relay interactive requirements as JSON-RPC data instead of
  transport failures, preserving stateful sessions.
- Refactor session setup to automatically negotiate and mirror
  protocol capabilities between downstream clients and upstream servers.
- Upgrade rmcp to 0.14.0, adopt decoupled structures (SEP-1319), and
  pin git rev ac4146e to resolve an enum variant shadowing issue
  (see modelcontextprotocol/rust-sdk#634).
- Enhance multiplexing logic to preserve and nest upstream _meta fields
  for end-to-end tracing and observability compliance.
- Replace legacy-rmcp (0.10.0) with modern 0.14.0 resumable-polling
  SSE implementations.
@apexlnc apexlnc mentioned this pull request Jan 29, 2026
Open
apexlnc added a commit to apexlnc/agentgateway that referenced this pull request Jan 30, 2026
@apexlnc
feat(mcp): support elicitation, tasks, and rmcp 0.14.0
b818b5c 
- Add support for "Human-in-the-loop" parameter filling (SEP-1330) and
  handroll URL-mode support (SEP-1036) locally while awaiting
  upstream inclusion in modelcontextprotocol/rust-sdk#605.
- Implement full lifecycle management for background tasks (SEP-1686),
  allowing tools to enqueue long-running work and poll for results
  across multiplexed upstreams.
- Implement a "Soft Error" parser for code -32042 (URL Required) to
  relay interactive requirements as JSON-RPC data instead of
  transport failures, preserving stateful sessions.
- Refactor session setup to automatically negotiate and mirror
  protocol capabilities between downstream clients and upstream servers.
- Upgrade rmcp to 0.14.0, adopt decoupled structures (SEP-1319), and
  pin git rev ac4146e to resolve an enum variant shadowing issue
  (see modelcontextprotocol/rust-sdk#634).
- Enhance multiplexing logic to preserve and nest upstream _meta fields
  for end-to-end tracing and observability compliance.
- Replace legacy-rmcp (0.10.0) with modern 0.14.0 resumable-polling
  SSE implementations.
@alexhancock
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alexhancock commented Feb 4, 2026

Sorry for the long delay getting to this. Do you mind rebasing?

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T-config Configuration file changes T-core Core library changes T-dependencies Dependencies related changes T-examples Example code changes T-handler Handler implementation changes T-model Model/data structure changes T-service Service layer changes T-test Testing related changes

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@pbezglasny @alexhancock @scutuatua-crypto