{
 "acronym": "SLIM",
 "adoption": {
  "by": null,
  "level": "unmeasured",
  "probe_run": null
 },
 "aliases": [
  "AGNTCY SLIM"
 ],
 "analog": "none",
 "collisions": [],
 "discovery": {
  "mechanism": "none",
  "path": "none"
 },
 "dispute": null,
 "evidence": [
  {
   "claim": "SLIM (Secure Low-Latency Interactive Messaging) is described by its own README as a next-generation communication framework providing the secure, scalable transport layer for AI agent protocols like A2A and MCP, with a Data Plane, Session Layer, and Control Plane architecture; the repository is Apache-2.0 licensed and was created 2025-02-05 under the agntcy GitHub org.",
   "date": "2026-09-05",
   "label": "VERIFIED",
   "url": "https://raw.githubusercontent.com/agntcy/slim/main/README.md"
  },
  {
   "claim": "Cisco donated the AGNTCY project, which SLIM belongs to, to the Linux Foundation; formative members named include Cisco, Dell Technologies, Google Cloud, Oracle, and Red Hat, and the project covers discovery, identity, messaging, and observability for multi-vendor AI agents, with SLIM as its messaging-transport protocol.",
   "date": "2026-09-05",
   "label": "VERIFIED",
   "url": "https://www.techzine.eu/blogs/infrastructure/133408/cisco-donates-agntcy-to-linux-foundation-internet-of-agents-on-its-way/"
  },
  {
   "claim": "A SLIM specification has also been filed at the IETF as an individual draft, draft-mpsb-agntcy-slim-00, \"Secure Low-Latency Interactive Messaging (SLIM).\"",
   "date": "2026-09-05",
   "label": "REPORTED",
   "url": "https://www.ietf.org/archive/id/draft-mpsb-agntcy-slim-00.html"
  }
 ],
 "form": "endpoint",
 "governance": "Linux Foundation (AGNTCY project); originally donated by Cisco",
 "group": null,
 "history": [
  {
   "date": "2026-09-06",
   "note": "new record created during coordinate-step verification; verified against github.com/agntcy/slim README, Linux Foundation/AGNTCY donation coverage, and the IETF individual draft draft-mpsb-agntcy-slim-00"
  }
 ],
 "id": "slim",
 "implementation": "shipping",
 "last_verified": "2026-09-06",
 "name": "Secure Low-Latency Interactive Messaging",
 "native_status": "\"Next-generation communication framework that provides the secure, scalable transport layer for AI agent protocols like A2A and MCP\"",
 "origin": {
  "date": "2025-02",
  "org": "Cisco (AGNTCY project)"
 },
 "part_of": null,
 "parties": [
  "agent-agent"
 ],
 "phase": "working-group",
 "probe": {
  "method": "none",
  "on_absent": "not applicable — SLIM has no well-known discovery surface as of this verification; see summary_md",
  "parse": "not applicable: there is no HTTP response to parse; presence would instead be inferred from a target's published SLIM node configuration or its listed use of the slim-a2a-python / slim-mcp-python bindings",
  "path": "none — SLIM is a session/routing protocol operated by a data-plane node over its own wire format, not a document served at a fixed well-known HTTP path; no origin-fetchable probe was identified"
 },
 "question": "How can agents send secure, low-latency, group-aware messages (point-to-point, pub/sub, fire-and-forget, streaming) as a transport underneath higher-level protocols like A2A and MCP?",
 "scope": "general",
 "spec_url": "https://github.com/agntcy/slim",
 "step": "coordinate",
 "summary_md": "SLIM (Secure Low-Latency Interactive Messaging) is a messaging/transport framework built for the AGNTCY project, intended to serve as the secure, scalable transport layer underneath higher-level agent protocols such as A2A and MCP [1]. It solves a gap those protocols leave open: neither A2A nor MCP specifies a low-latency, group-aware, end-to-end-encrypted messaging transport; SLIM supports request-response, publish-subscribe, fire-and-forget, and streaming interaction patterns, and builds in authentication, authorization, and end-to-end (MLS) encryption at the transport layer [2]. Architecturally it splits into a Data Plane (pure hierarchical-name-based packet routing, content-blind), a Session Layer (reliable delivery, end-to-end MLS encryption, group membership), and a Control Plane (configuration, monitoring, orchestration) — letting lightweight routing nodes run only the data plane while applications carry the full stack via language bindings (Python, Go, .NET, Java, Kotlin) [1].\n\nSLIM does not define agent discovery, identity, or task semantics itself — those are the roles of A2A/MCP and AGNTCY's separate directory/identity components; SLIM's own README frames itself purely as the transport underneath those protocols [1].\n\nCurrent state: the `agntcy/slim` repository was created 2025-02-05, is Apache-2.0 licensed, and is actively maintained (CI, code coverage, and OpenSSF Scorecard badges all present and green as of this check) [1]. AGNTCY itself — the umbrella project SLIM belongs to — was donated by Cisco to the Linux Foundation, with Dell Technologies, Google Cloud, Oracle, and Red Hat joining as formative members, to standardize open multi-agent-system infrastructure including discovery, identity, messaging (SLIM), and observability [2]. A SLIM specification has also been filed as an individual IETF Internet-Draft, draft-mpsb-agntcy-slim-00, though it is not yet a working-group document — this record treats the Linux Foundation/AGNTCY project as SLIM's primary governance home given that the code, documentation, and formative-member structure all live there, and marks track as linux-foundation rather than ietf accordingly. Implementations exist and ship as bindings across five languages plus integrations for A2A and MCP transport (slim-a2a-python, slim-mcp-python) and OpenTelemetry [1]. What is unresolved: no independently measured adoption count was found; this is a genuinely new record added during this verification pass per the coordinator's occupant-diff instruction, and its exact relationship to the IETF draft (same authors? formally submitted by the AGNTCY project?) was not further disambiguated in this pass.",
 "track": "linux-foundation",
 "version": {
  "date": null,
  "label": "IETF individual draft draft-mpsb-agntcy-slim-00; active GitHub development"
 },
 "url": "https://agenticweb.wiki/protocols/slim/",
 "category": "coordinate",
 "type": "protocol"
}