SLIM
AGNTCY's secure, low-latency messaging substrate for agent-to-agent, human-in-the-loop and tool communication, designed for multi-modal exchange and quantum-safe security.
- name
- SLIM
- full_name
- Secure Low-latency Interactive Messaging
- layer
- interop
- creator
- AGNTCY project (Cisco / Outshift); Linux Foundation
- status
- active (AGNTCY component)
- year
- 2025
- one_liner
- AGNTCY's secure, low-latency messaging substrate for agent-to-agent, human-in-the-loop and tool communication, designed for multi-modal exchange and quantum-safe security.
- spec_url
- https://docs.agntcy.org/
- snippet
SLIM carries agent ↔ agent / human / tool messages with low latency and quantum-safe security.- abbreviation
- SLIM
- also_known_as
Secure Low-latency Interactive Messaging- canonical_spec_url
- https://docs.agntcy.org/messaging/slim-core/
- entity_uri
- https://github.com/agntcy
- taxonomy_layer
- interop
- sub_layer
- agent-messaging-substrate
- protocol_type
- transport
- central_problem
- Gives multi-agent systems a secure, low-latency messaging substrate for agent-to-agent, human-in-the-loop, and tool communication with multi-modal data and quantum-safe security.
- maintainer
- AGNTCY project under the Linux Foundation (originated at Cisco / Outshift)
- governance_body
- Linux Foundation (AGNTCY)
- license
- Apache-2.0 verify-against-primary-at-build ↗ https://github.com/agntcy
- maturity_tag
- emerging
- current_spec_version
- — verify-against-primary-at-build ↗ https://docs.agntcy.org/
- spec_date
- — verify-against-primary-at-build ↗ https://docs.agntcy.org/
- launch_date
- 2025 verify-against-primary-at-build ↗ https://docs.agntcy.org/
- last_verified
- 2026-06-15
- transport
- Low-latency messaging substrate (multi-modal; quantum-safe security by design)
- core_mechanism
- SLIM (Secure Low-latency Interactive Messaging) handles the communication patterns of AGNTCY: agent-to-agent, human-in-the-loop, and tool exchanges, optimized for low-latency multi-modal data with quantum-safe security designed in. It is the messaging leg of AGNTCY's Internet-of-Agents stack, paired with OASF discovery.
- discovery_endpoint
- SLIM messaging endpoints (AGNTCY component; implementation-defined)
- settlement_type
- —
- adoption_metric
- — verify-against-primary-at-build ↗ https://docs.agntcy.org/
- notable_adopters
{"value":"Cisco / Outshift (originator)","source":"https://www.linuxfoundation.org/press/linux-foundation-welcomes-the-agntcy-project-to-standardize-open-multi-agent-system-infrastructure-and-break-down-ai-agent-silos"}- relationships
{"predicate":"part_of","target":"agntcy","note":"SLIM -part_of-> AGNTCY: SLIM is AGNTCY's secure messaging component (paired with OASF discovery)."}{"predicate":"competes_with","target":"a2a","note":"SLIM is an agent messaging transport, overlapping with A2A's task/message transport."}- ideal_use_case
- The secure, low-latency message bus for a multi-agent system built on AGNTCY, including human-in-the-loop steps.
- when_to_use
- When you need a purpose-built, low-latency, quantum-safe messaging substrate across agents, humans, and tools within AGNTCY.
- when_not_to_use
- When A2A's HTTP/JSON-RPC transport or plain REST (ACP) already meets your messaging needs.
- code_example
- // SLIM messaging (schematic) // slim.connect(agent.endpoint); slim.send({ to: 'planner', modality: 'text', body: '...' })
- source
- SLIM as AGNTCY's secure low-latency messaging component (agent/human/tool, multi-modal, quantum-safe): https://docs.agntcy.org/ ; AGNTCY/LF context https://www.linuxfoundation.org/press/linux-foundation-welcomes-the-agntcy-project-to-standardize-open-multi-agent-system-infrastructure-and-break-down-ai-agent-silos . Listed for addition in research §2.
- agent_readiness_link
- agent-readiness/a2a
- layer_legacy
- agent